CN113467417B - Finished automobile test control method, device and equipment and readable storage medium - Google Patents
Finished automobile test control method, device and equipment and readable storage medium Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The application relates to a finished automobile test control method, a device, equipment and a readable storage medium, relating to the technical field of finished automobile tests and comprising the steps of creating a finished automobile CAN message of a finished automobile control unit, wherein the finished automobile CAN message comprises a control unit basic information message; creating a rack CAN message of the test rack system, wherein the rack CAN message comprises the wheel side rotating speed of a dynamometer and the wheel side torque of the dynamometer; integrating the CAN message of the whole vehicle and the CAN message of the rack to form a DBC file; and analyzing the DBC file, and performing simulation test on each working condition of the whole vehicle according to the analysis result to obtain a test result. According to the invention, the whole vehicle test is moved to the development stage for virtual test, so that the road verification of the real vehicle is not required, the whole vehicle development period is shortened, the cost is reduced, the whole vehicle test is not required to be carried out through an uncured software calibration control strategy, and the safety of the real vehicle test is improved.
Description
Technical Field
The application relates to the technical field of finished automobile tests, in particular to a finished automobile test control method, a finished automobile test control device, finished automobile test control equipment and a readable storage medium.
Background
Nowadays, the economy is rapidly developed, and the living standard of people is continuously improved, the number of automobiles is also continuously increased, and the automobiles become an indispensable vehicle in the work and the life of people. However, because the use conditions of the automobile products are complex and the requirements on the performance of the products are high, in order to ensure the quality and the performance of the automobile products, the whole automobile test becomes an important component of the automobile industry, and is the most important link in the whole automobile development process, namely, the theory of no test is wood-free, the test is an effective method for verifying the theory and solving the problem, and the whole automobile test needs to be verified to ensure the reliability of the product quality and the performance of the whole automobile no matter how fine and careful the theoretical design is, so the whole automobile test is an important means for ensuring the performance of the automobile products.
However, the traditional finished automobile test needs a large number of real automobiles to verify on a road, and not only various calibration engineers are required to carry out real automobile calibration on the vehicle, but also fuel is consumed, so that the problem of high cost exists; and because the software calibration control strategy is not solidified, the whole vehicle test of the real vehicle by the uncured software calibration control strategy is easy to cause the risks of out-of-control and the like of the vehicle, and further the danger in the real vehicle test process is aggravated.
Disclosure of Invention
The application provides a whole vehicle test control method, a whole vehicle test control device, a whole vehicle test control equipment and a readable storage medium, and aims to solve the problems of high cost and poor safety in the related technology.
In a first aspect, a vehicle test control method is provided, which includes the following steps:
the method comprises the steps that a whole vehicle CAN message of a whole vehicle control unit is created, wherein the whole vehicle CAN message comprises a control unit basic information message, and the control unit basic information message comprises a P _ CAN message and an H _ CAN message; the P _ CAN message comprises a speed signal of each wheel, a brake master cylinder oil pressure signal, a brake pedal switch signal, a gear shifting signal, a vehicle speed signal, an ignition switch signal and an engine starting request signal; the H _ CAN message comprises a battery signal, a rotating speed signal of a driving motor and a rotating speed signal of an engine;
creating a rack CAN message of a test rack system, wherein the rack CAN message comprises a dynamometer wheel side rotating speed and a dynamometer wheel side torque;
integrating the whole vehicle CAN message and the rack CAN message to form a DBC file;
analyzing the DBC file, and performing simulation test on each working condition of the whole vehicle according to an analysis result to obtain a test result;
wherein, will whole car CAN message with the rack CAN message is integrated, forms the DBC file, includes:
integrating the P _ CAN message with the rack CAN message to form a CAN1 message;
integrating the H _ CAN message with the rack CAN message to form a CAN2 message;
integrating the CAN1 message and the CAN2 message to form a DBC file;
before the simulation test of each working condition is carried out on the whole vehicle according to the analytic result, the method further comprises the following steps:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting the whole vehicle low-voltage power supply circuit with the test bench system low-voltage power supply circuit according to the connection control strategy;
electrically connecting the double throttle circuits of the whole vehicle with the double throttle circuits of the test bed system according to the connection control strategy;
and according to the connection control strategy, a P _ CAN bus corresponding to the P _ CAN message is connected with a CAN1 line on the test bench system, and an H _ CAN bus corresponding to the H _ CAN message is connected with a CAN2 line on the test bench system.
In some embodiments, the performing simulation tests on the entire vehicle under various operating conditions according to the analytic result includes:
setting simulation data according to the analysis result, wherein the simulation data comprises input data, output data, a variable calculation formula and vehicle information;
and carrying out simulation test on each working condition of the whole vehicle according to the simulation data and the analysis result.
In some embodiments, the vehicle information includes vehicle mass, tire radius, final reduction ratio, gear ratio, road wind resistance, sliding resistance, road load factor, and braking energy recovery.
In some embodiments, the method further comprises:
and comparing real-time operation data of a dynamometer of the test bed system with a preset alarm threshold value, and alarming according to a comparison result, wherein the real-time operation data comprises rotating speed, torque, temperature, pressure, battery charge state, battery temperature, bus voltage, current and gear.
In a second aspect, a vehicle test control device is provided, which includes:
the system comprises a first establishing module, a second establishing module and a sending module, wherein the first establishing module is used for establishing a whole vehicle CAN message of a whole vehicle control unit, the whole vehicle CAN message comprises a control unit basic information message, and the control unit basic information message comprises a P _ CAN message and an H _ CAN message; the P _ CAN message comprises a speed signal of each wheel, a brake master cylinder oil pressure signal, a brake pedal switch signal, a gear shifting signal, a vehicle speed signal, an ignition switch signal and an engine starting request signal; the H _ CAN message comprises a battery signal, a rotating speed signal of a driving motor and a rotating speed signal of an engine;
the second creating module is used for creating a rack CAN message of the test rack system, wherein the rack CAN message comprises the wheel edge rotating speed of the dynamometer and the wheel edge torque of the dynamometer;
the message integration module is used for integrating the whole vehicle CAN message and the rack CAN message to form a DBC file;
the simulation test module is used for analyzing the DBC file and carrying out simulation test on each working condition of the whole vehicle according to the analysis result to obtain a test result;
the message integration module is specifically configured to:
integrating the P _ CAN message with the rack CAN message to form a CAN1 message;
integrating the H _ CAN message with the rack CAN message to form a CAN2 message;
integrating the CAN1 message and the CAN2 message to form a DBC file;
the apparatus also includes a connection control module to:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting the whole vehicle low-voltage power supply circuit with the test bench system low-voltage power supply circuit according to the connection control strategy;
electrically connecting the whole vehicle double throttle circuit with the test bed system double throttle circuit according to the connection control strategy;
and respectively connecting a P _ CAN bus corresponding to the P _ CAN message with a CAN1 line on the test bench system and connecting an H _ CAN bus corresponding to the H _ CAN message with a CAN2 line on the test bench system according to the connection control strategy.
In a third aspect, a vehicle verification control device is provided, which includes: the control system comprises a memory and a processor, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor so as to realize the whole vehicle test control method.
In a fourth aspect, a computer-readable storage medium is provided, which stores computer instructions, and when the computer instructions are executed by a computer, the computer is enabled to execute the whole vehicle test control method.
The beneficial effect that technical scheme that this application provided brought includes: the whole vehicle test is moved to the development stage for virtual test, so that the whole vehicle development period is shortened, the cost is reduced, and the safety of the real vehicle test is improved.
The application provides a finished automobile test control method, a device, equipment and a readable storage medium, which comprises a finished automobile CAN message for establishing a finished automobile control unit, wherein the finished automobile CAN message comprises a control unit basic information message; creating a rack CAN message of a test rack system, wherein the rack CAN message comprises the wheel side rotating speed of a dynamometer and the wheel side torque of the dynamometer; integrating the whole vehicle CAN message and the rack CAN message to form a DBC file; and analyzing the DBC file, and performing simulation test on each working condition of the whole vehicle according to an analysis result to obtain a test result. By the aid of the method, the whole vehicle test is moved to the development stage for virtual testing, road verification of the real vehicle is not needed, the whole vehicle development period is shortened, cost is reduced, the whole vehicle test is not needed through an uncured software calibration control strategy, and safety of the real vehicle test is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a complete vehicle test control method provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a finished vehicle test control device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a finished automobile verification control device provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a finished automobile test control method, a finished automobile test control device, finished automobile test control equipment and a readable storage medium, and can solve the problems of high cost and poor safety in the related technology.
Fig. 1 is a schematic flow chart of a complete vehicle test control method provided in an embodiment of the present application, including the following steps:
step S10: creating a Controller Area Network (CAN) message of a whole vehicle control unit, wherein the CAN message of the whole vehicle comprises a basic information message of the control unit;
in the present exemplary embodiment, the Vehicle Control units in the hybrid Vehicle System include a VCU (Vehicle Control Unit), an EMS (Engine Management System), an MCU (Microcontroller Unit), a TCU (Transmission Control Unit), a BMS (Battery Management System), a GCU (Generator Control Unit), and the like, and each Control Unit is connected to the CAN bus by adding a 120 Ω terminal resistance.
The method comprises the steps that a whole vehicle CAN message of a whole vehicle control unit is established based on basic information of the control unit, wherein the whole vehicle CAN message comprises a control unit basic information message, and the control unit basic information message specifically comprises a P _ CAN message and an H _ CAN message; the P _ CAN message includes a speed signal of each wheel, a brake master cylinder oil pressure signal (ESC _ BrakeOilPress), a brake pedal switch signal (EMS _ brakepadaidal signal), a shift gear signal (SCU _ ActualGear), a vehicle speed signal (ESC _ VehSpd), an ignition switch signal (ibcmignationst), and an engine start request signal (EngineStartReq), wherein the speed signal includes a left front wheel speed (ESC _ frontleft wheelspeed spd), a right front wheel speed (ESC _ frontright wheelspeed spd), a left rear wheel speed (ESC _ rerleftwheelspeed spd), and a right rear wheel speed (ESC _ rerriwheelspeed spd); the H _ CAN message comprises a battery signal, a rotating speed signal (MCU _ MotorSpd) of a driving motor and a rotating speed signal (EMS _ EngSpd) of an engine, wherein the battery signal comprises a battery state of charge (BMS _ SOC), a battery total Voltage (BMS _ Voltage) and a battery charging and discharging total Current (BMS _ Current).
Step S20: creating a rack CAN message of a test rack system, wherein the rack CAN message comprises a dynamometer wheel side rotating speed and a dynamometer wheel side torque;
in the present embodiment, the test bed system may be a two-body and four-body powertrain test bed system, or may be other test bed systems capable of performing a hybrid vehicle test, which is not limited herein. In this embodiment, a two-trunk and four-trunk power assembly test bed system is taken as an example: and creating a rack CAN message based on the wheel side rotating Speed and the wheel side torque of the dynamometer in the test rack system, wherein the rack CAN message specifically comprises the wheel side rotating Speed of the dynamometer such as the right front wheel side rotating Speed (Dyno _ FR _ Speed), the left front wheel side rotating Speed (Dyno _ FL _ Speed), the right rear wheel side rotating Speed (Dyno _ RR _ Speed) and the left rear wheel side rotating Speed (Dyno _ RL _ Speed), and the wheel side torques such as the right front wheel side torque (Dyno _ FR _ wheelTorque), the left front wheel side torque (Dyno _ FL _ wheelTorque), the right rear wheel side torque (Dyno _ RR _ wheelTorque) and the left rear wheel side torque (Dyno _ RL _ wheelTorque).
Step S30: integrating the whole vehicle CAN message and the rack CAN message to form a DBC (Database Can, CAN Database file) file;
exemplarily, in the present embodiment, the DBC file is a file for describing data communication between nodes of the CAN network, and includes protocol data in the CAN bus protocol and specific meaning represented by the protocol data, that is, it defines the information of CAN communication completely and clearly, and the communication of the CAN network is performed according to the description of the file. Simply speaking, after a complete vehicle CAN message and a rack CAN message are integrated, a DBC file is formed, the DBC file describes that information such as the complete vehicle CAN message and the rack CAN message exists on a CAN network, the complete vehicle CAN message carries signal information such as a brake master cylinder oil pressure signal and a brake pedal switch signal, and the rack CAN message carries signal information such as a dynamometer wheel side rotating speed and a dynamometer wheel side torque; and information describing from which node the different messages are sent and received.
Specifically, the P _ CAN message and the rack CAN message are integrated to form a CAN1 message; integrating the H _ CAN message with the rack CAN message to form a CAN2 message; and integrating the CAN1 message and the CAN2 message to form a DBC file.
Exemplarily, in this embodiment, the test bench system includes a plurality of data transmission CAN modules (for example, CAN1 modules and CAN2 modules, the number of CAN modules is determined according to specific requirements, and is not limited herein), and the plurality of CAN modules CAN transmit data in parallel, so that a complete vehicle test simulation CAN be performed according to the received parallel data; therefore, the protocol matrix definition in the P _ CAN message and the protocol in the rack CAN message are integrated uniformly to form a CAN1 message, the protocol matrix definition in the H _ CAN message and the protocol in the rack CAN message are integrated uniformly to form a CAN2 message, the CAN1 message and the CAN2 message are integrated corresponding to a CAN matrix network to form a DBC file with CAN protocol control logic, and the DBC file contains information on which CAN module the CAN1 message and the CAN2 message carry out data transmission. For example, the CAN1 message is transmitted in the CAN1 module, and the CAN2 message is transmitted in the CAN2 module, so that the CAN1 message and the CAN2 message CAN be transmitted in parallel and cooperatively used for simulating a finished automobile test.
Step S40: and analyzing the DBC file, and performing simulation test on each working condition of the whole vehicle according to an analysis result to obtain a test result.
Exemplarily, in this embodiment, after the DBC file is analyzed, information that a complete vehicle CAN message and a rack CAN message need to be transmitted on a CAN network CAN be obtained, specifically, a CAN1 message obtained by integrating a P _ CAN message and the rack CAN message is transmitted in a CAN1 module, a CAN2 message obtained by integrating an H _ CAN message and the rack CAN message is transmitted in a CAN2 module, and information such as specific sending nodes and receiving nodes of each message and specific signals that need to be transmitted in each module CAN also be obtained; and according to the result obtained by the analysis, the whole vehicle can be subjected to simulation test of each working condition to obtain a test result.
Specifically, analog data are set according to the analysis result, and the analog data comprise input data, output data, a variable calculation formula and vehicle information; and carrying out simulation test on each working condition of the whole vehicle according to the simulation data and the analysis result.
Exemplarily, in this embodiment, after the DBC file is respectively opened and analyzed in the CAN1 module and the CAN2 module, which data needs to be transmitted in the CAN module CAN be determined. For example, a CAN1 message is transmitted in a CAN1 module, a CAN2 message is transmitted in a CAN2 module, and simulation data such as input data, output data, a variable calculation formula, vehicle information and the like required by a test bench system for vehicle test simulation are determined according to the information recorded in the CAN1 message and the CAN2 message.
Further, analog data is set in each module (including an analog input module (AI module), an analog output module (AO module), a digital input module (DI module), and a digital output module (DO module)) in the test bench system, for example, sampling time, frequency, and precision of variables edited and displayed in the AI module are prompted according to a message, variables to be input to a control unit such as MCU, VCU, TCU, BMS, and EMS for display, such as battery charge state, battery voltage, and battery current, to be output to the BMS for display, and motor controller temperature, motor speed, and engine speed to be displayed in the MCU; setting variables such as MCU, VCU, TCU, BMS, EMS and the like which need to be input into a test bed system for simulation in the AO module according to the message prompt, for example, setting the left front wheel side rotating speed, the right front wheel side rotating speed, the vehicle speed, the gear information, the brake signal, the accelerator voltage, the ignition switch signal and the like of the VCU to be input into the test bed system for simulation and corresponding relations, for example, the brake master cylinder pressure of 0.48V corresponds to 0 and 4.5V to 100 percent, the brake vacuum opening of 0.5V corresponds to 0 and 4.5V to 100 percent, and the atmospheric pressure of 0.5V corresponds to 0 and 4.5V to 100 percent; the method comprises the steps of editing calculation formulas for calculating actual finished vehicle gears, finished vehicle wheel side rotating speeds (gearbox speed ratios), finished vehicle wheel side torques, vehicle speeds and the like in an FDV calculation formula editor, for example, editing a rack gear formula in formula equipment, enabling a value 4 of a D gear in the formula equipment to correspond to 7 of the D gear of the rack gear, enabling a value 0 of an N gear to correspond to 0 of the rack gear and the like, and after the editing is completed, calculating the dynamic vehicle speeds of the finished vehicles corresponding to all gears through the calculation formulas in the testing process, namely the vehicle speeds = gear speed ratios x main reduction ratio x dynamometer rotating speeds.
The whole vehicle information includes the whole vehicle mass, the tire radius, the main reduction ratio, the gear speed ratio, the highest vehicle speed, the highest engine speed, the highest motor speed, the road wind resistance, the sliding resistance, the road load coefficient, the braking energy recovery and the like, and the whole vehicle information can be set according to specific requirements and is not limited herein.
According to the analysis result and the set simulation data, the CAN bus joint debugging is carried out on the Test bench and the whole Vehicle control unit, the signals of the Test bench system CAN be statically and dynamically debugged after the Test bench system and the whole Vehicle control unit CAN normally send and receive CAN messages, and the corresponding input and output frequency, message address, control precision and the like are selected, so that the whole Vehicle CAN automatically circularly simulate various signals under various working conditions in NEDC (New European Driving Cycle) or WLTC (World Light Vehicle Test Cycle).
For example, the motor speed, the motor torque, the motor controller temperature, the transmission gear state of the TCU, the transmission oil pressure, the clutch state, the engine speed of the EMS, the estimated engine torque, the battery voltage of the BMS, the battery current, the SOC (System on Chip) power, etc. input to the MCU; dynamically starting low-voltage electrification of the test bed system according to an electrification safety strategy, and when the test bed system receives VCU whole vehicle key low-voltage electrification and whole vehicle high-voltage electrification information, indicating that the vehicle is in a READY state at the moment; then the test bench system simulates the whole vehicle to start through CAN communication, so that an engine runs, further the whole vehicle CAN simulate the working conditions of stepping on a brake, engaging a D gear, opening of an accelerator, driving intention, full accelerator rapid acceleration, accelerating the vehicle from rest to 80km/h, accelerating the vehicle to 120km/h, braking the vehicle to stop and the like, and the functions of automatic combination and automatic gear shifting of a gearbox clutch, dynamic real-time calculation of vehicle speed, high-speed braking energy recovery and the like are completed; after the test is finished, the actual results of gears, braking energy torque, braking main oil cylinder pressure and the like can be output, dynamic simulation of the whole hybrid power vehicle on a test bench system is completed, development and verification of the whole hybrid power vehicle on the test bench system are further realized, namely, a power assembly development test is moved forward, the whole vehicle calibration development capacity is improved, a whole vehicle test is transferred from a real vehicle road system to the test bench system, the test development manpower and oil cost can be reduced, and the whole vehicle control strategy can be improved.
Therefore, the whole vehicle test is moved forward to the development stage for virtual test, the road verification of the whole vehicle is not needed, the development period of the whole vehicle is shortened, the cost is reduced, the whole vehicle test is not needed through an uncured software calibration control strategy, the safety of the real vehicle test is improved, and a good test means is provided for the forward movement of the whole vehicle test.
Further, in this embodiment, before the performing the simulation test of each operating condition on the entire vehicle according to the analysis result, the method further includes:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting the whole vehicle low-voltage power supply circuit with the test bench system low-voltage power supply circuit according to the connection control strategy;
electrically connecting the whole vehicle double throttle circuit with the test bed system double throttle circuit according to the connection control strategy;
and respectively connecting a P _ CAN bus corresponding to the P _ CAN message with a CAN1 line on the test bench system and connecting an H _ CAN bus corresponding to the H _ CAN message with a CAN2 line on the test bench system according to the connection control strategy.
Exemplarily, in this embodiment, a power-on safety policy of the test bed system may be obtained by analyzing the DBC file, and a connection control policy of the vehicle control unit and the test bed may be determined according to the power-on safety policy. For example, the DBC file stores the content of the definition of the whole vehicle electrical drawing obtained by modifying the whole vehicle wiring harness and the test bed electrical system according to the present application, so that the connection between the whole vehicle wiring harness and the test bed electrical system can be made according to the definition of the whole vehicle electrical drawing, for example, according to the definition of the whole vehicle wiring harness pin, the power supply of the VCU, the power supply of the MCU, the power supply of the TCU, the power supply of the BMS, and the power supply of the EMS are connected to the agilent low-voltage power supply in the test bed system; connecting a double-accelerator circuit of a VCU of the whole vehicle with a double-accelerator circuit PPS1 (high) and a double-accelerator circuit PPS2 (low) of a test bench system; respectively connecting a P _ CAN bus and an H _ CAN bus of the whole vehicle with a CAN1 line and a CAN2 line of a test bed system through buses (wherein a pin 2 is low, and a pin 7 is high); connecting a brake signal of the TCU, a brake master cylinder pressure signal and a brake vacuum opening degree with AO output of the test bed system; the whole vehicle wire harness brake control signal is connected with the DO output on the test bed system, and the like, so that a foundation is provided for the normal communication between the test bed system and the whole vehicle control unit, and the power-on safety of the system is ensured.
Further, in this embodiment, the method further includes: and comparing real-time operation data of a dynamometer of the test bed system with a preset alarm threshold value, and alarming according to a comparison result, wherein the real-time operation data comprises rotating speed, torque, temperature, pressure, battery charge state, battery temperature, bus voltage, current and gear.
For example, in the present embodiment, the rotation speed, torque, temperature, pressure, battery state of charge, battery temperature, bus voltage, current, gear and other alarm thresholds of the dynamometer in the test bench system can be preset. In the whole vehicle test process, real-time operation data are compared with preset alarm threshold values, and alarm is started as long as one of the operation data exceeds the alarm threshold value, namely, when any fault occurs in operation, the test bed triggers an alarm limit value. For example, when the real-time rotating speed is greater than a preset rotating speed alarm threshold value, the alarm is automatically started, so that a tester can take corresponding measures and statistics, and the fault detection rate of the whole vehicle signal is effectively improved.
Referring to fig. 2, an embodiment of the present application further provides a finished automobile test control device, including:
the system comprises a first establishing module, a second establishing module and a control unit, wherein the first establishing module is used for establishing a whole vehicle CAN message of a whole vehicle control unit, and the whole vehicle CAN message comprises a control unit basic information message;
the second creating module is used for creating a rack CAN message of the test rack system, wherein the rack CAN message comprises the wheel side rotating speed of the dynamometer and the wheel side torque of the dynamometer;
the message integration module is used for integrating the whole vehicle CAN message and the rack CAN message to form a DBC file;
and the simulation test module is used for analyzing the DBC file and carrying out simulation test on each working condition of the whole vehicle according to the analysis result to obtain a test result.
Therefore, the method and the device can move the whole vehicle test forward to the development stage for virtual testing, not only does not need a real vehicle to carry out road verification, shortens the development period of the whole vehicle, reduces the cost, but also does not need an uncured software calibration control strategy to carry out the whole vehicle test, improves the safety of the real vehicle test, and provides a good testing means for the forward movement of the whole vehicle test.
Further, in this embodiment, the basic information message of the control unit includes a P _ CAN message and an H _ CAN message;
the P _ CAN message comprises a speed signal of each wheel, a brake master cylinder oil pressure signal, a brake pedal switch signal, a gear shifting signal, a vehicle speed signal, an ignition switch signal and an engine starting request signal;
the H _ CAN message comprises a battery signal, a rotating speed signal of a driving motor and a rotating speed signal of an engine.
Further, in this embodiment, the message integration module is specifically configured to:
integrating the P _ CAN message with the rack CAN message to form a CAN1 message;
integrating the H _ CAN message with the rack CAN message to form a CAN2 message;
and integrating the CAN1 message and the CAN2 message to form a DBC file.
Referring to fig. 2, further, in this embodiment, the apparatus further includes a connection control module, configured to:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting the whole vehicle low-voltage power supply circuit with the test bench system low-voltage power supply circuit according to the connection control strategy;
electrically connecting the double throttle circuits of the whole vehicle with the double throttle circuits of the test bed system according to the connection control strategy;
and respectively connecting a P _ CAN bus corresponding to the P _ CAN message with a CAN1 line on the test bench system and connecting an H _ CAN bus corresponding to the H _ CAN message with a CAN2 line on the test bench system according to the connection control strategy.
Furthermore, in this embodiment, the simulation test module is specifically configured to:
setting simulation data according to the analysis result, wherein the simulation data comprises input data, output data, a variable calculation formula and vehicle information;
and carrying out simulation test on each working condition of the whole vehicle according to the simulation data and the analysis result.
Furthermore, in this embodiment, the vehicle information includes vehicle mass, tire radius, final reduction ratio, gear speed ratio, road wind resistance, sliding resistance, road load coefficient, and braking energy recovery.
Referring to fig. 2, further, in this embodiment, the apparatus further includes an early warning module, configured to:
and comparing real-time operation data of a dynamometer of the test bed system with a preset alarm threshold value, and alarming according to a comparison result, wherein the real-time operation data comprises rotating speed, torque, temperature, pressure, battery charge state, battery temperature, bus voltage, current and gear.
In this embodiment, the using method of the apparatus is as follows: a whole vehicle CAN message of a whole vehicle control unit is created through a first creation module; establishing a rack CAN message of the test rack system through a second establishing module; integrating the whole vehicle CAN message and the rack CAN message through a message integration module to form a DBC file; analyzing the DBC file through a simulation test module to obtain a connection control strategy and a power-on safety strategy; then, the whole vehicle wire harness is connected with the test bench system through the connection control module based on a connection control strategy, and before the test bench system is started, the connection states of a low-voltage power supply (Agilent) of the test bench system and a low-voltage power supply box line of the whole vehicle wire harness, the connection states of a P _ CAN bus and an H _ CAN bus of a whole vehicle control unit and a CAN1 line and a CAN2 line of the test bench system, the state of a 120 omega terminal resistor, and the connection states of a high-voltage line and a low-voltage line of a battery of a motor and a BMS (battery management system) of an MCU (micro-controller unit) are respectively checked;
after all the connection states are in normal states, setting a system limit value according to test requirements for alarming; setting the complete vehicle NEDC cycle working conditions such as braking, sliding energy recovery function, climbing slope 20%, climbing slope 40% and the like according to the analysis result; starting the test bed system according to the power-on safety strategy, wherein at the moment, the low-voltage power-on Agilent outputs 12V voltage, the display interface of the test bed system sets an ignition switch signal to be 1, the whole vehicle system is in a READY state, and the test bed system performs CAN message receiving, starting state display and automatic control function verification on all control units of the whole vehicle; then, the test bed system is subjected to automatic condition test, for example, the test bed system controls the rotation speed operation of the dynamometer according to the vehicle speed comparison table (see table 1), such as vehicle speed =0.377 × 0.33 × dynamometer rotation speed, engine rotation speed =3.425 × dynamometer rotation speed, generator rotation speed =2.476 × 3.425 × dynamometer rotation speed, and driving motor rotation speed =2.82 × 3.425 × dynamometer rotation speed; and verifying the automatic control curve of 0-120 km/h and outputting a test result.
Through simulating the complete vehicle NEDC cycle working condition test of hybrid power many times, CAN know that this device CAN satisfy the complete vehicle test verification function, has better verified the ability of complete vehicle CAN message injection fault information relevance ratio, realizes the experimental antedisplacement of hybrid power development, for complete vehicle development practices thrift a large amount of manpowers, material resources cost, has filled domestic realization hybrid power complete vehicle verification blank on test bench system, for complete vehicle development practices thrift a large amount of research and development expenses, promotes complete vehicle research and development ability, reduces the research and development cost, shortens the research and development cycle.
TABLE 1 speed comparison chart
It should be noted that, as will be clearly understood by those skilled in the art, for convenience and simplicity of description, the specific working processes of the device and each module described above may refer to the corresponding processes in the foregoing embodiment of the vehicle test control method, and are not described herein again.
The vehicle test control device provided by the above embodiment may be implemented in the form of a computer program, and the computer program may be run on the vehicle verification control device shown in fig. 3.
The embodiment of the present application further provides a finished automobile verification control device, including: the system comprises a memory, a processor and a network interface which are connected through a system bus, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor so as to realize all steps or part of steps of the whole vehicle test control method.
The network interface is used for performing network communication, such as sending distributed tasks. Those skilled in the art will appreciate that the architecture shown in fig. 3 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
The Processor may be a CPU, other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and the various parts of the overall computer device being connected by various interfaces and lines.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a video playing function, an image playing function, etc.), and the like; the storage data area may store data (such as video data, image data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The embodiment of the application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, all steps or part of steps of the whole vehicle test control method are implemented.
The embodiments of the present application may implement all or part of the foregoing processes, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the foregoing methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-Only memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers in the embodiments of the present application are for description only and do not represent the merits of the embodiments.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A whole vehicle test control method is characterized by comprising the following steps:
the method comprises the steps that a whole vehicle CAN message of a whole vehicle control unit is created, wherein the whole vehicle CAN message comprises a control unit basic information message, and the control unit basic information message comprises a P _ CAN message and an H _ CAN message; the P _ CAN message comprises a speed signal of each wheel, a brake master cylinder oil pressure signal, a brake pedal switch signal, a gear shifting signal, a vehicle speed signal, an ignition switch signal and an engine starting request signal; the H _ CAN message comprises a battery signal, a rotating speed signal of a driving motor and a rotating speed signal of an engine;
creating a rack CAN message of a test rack system, wherein the rack CAN message comprises a dynamometer wheel side rotating speed and a dynamometer wheel side torque;
integrating the whole vehicle CAN message and the rack CAN message to form a DBC file;
analyzing the DBC file, and performing simulation test on each working condition of the whole vehicle according to an analysis result to obtain a test result;
wherein, will whole car CAN message with the rack CAN message is integrated, forms the DBC file, includes:
integrating the P _ CAN message with the rack CAN message to form a CAN1 message;
integrating the H _ CAN message with the rack CAN message to form a CAN2 message;
integrating the CAN1 message and the CAN2 message to form a DBC file;
before the simulation test of each working condition is carried out on the whole vehicle according to the analytic result, the method further comprises the following steps:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting a low-voltage power supply circuit of the whole vehicle with a low-voltage power supply circuit of a test bed system according to the connection control strategy;
electrically connecting the whole vehicle double throttle circuit with the test bed system double throttle circuit according to the connection control strategy;
and according to the connection control strategy, a P _ CAN bus corresponding to the P _ CAN message is connected with a CAN1 line on the test bench system, and an H _ CAN bus corresponding to the H _ CAN message is connected with a CAN2 line on the test bench system.
2. The vehicle test control method according to claim 1, wherein the simulation test of each working condition of the vehicle according to the analysis result comprises:
setting simulation data according to the analysis result, wherein the simulation data comprises input data, output data, a variable calculation formula and vehicle information;
and carrying out simulation test on each working condition of the whole vehicle according to the simulation data and the analysis result.
3. The vehicle test control method according to claim 2, characterized in that: the whole vehicle information comprises the whole vehicle mass, the tire radius, the main reduction ratio, the gear speed ratio, the road wind resistance, the sliding resistance, the road load coefficient and the braking energy recovery.
4. The vehicle test control method according to claim 1, further comprising:
and comparing real-time operation data of a dynamometer of the test bed system with a preset alarm threshold value, and alarming according to a comparison result, wherein the operation data comprises rotating speed, torque, temperature, pressure, battery charge state, battery temperature, bus voltage, current and gear.
5. The utility model provides a whole car test control device which characterized in that includes:
the system comprises a first establishing module, a second establishing module and a sending module, wherein the first establishing module is used for establishing a whole vehicle CAN message of a whole vehicle control unit, the whole vehicle CAN message comprises a control unit basic information message, and the control unit basic information message comprises a P _ CAN message and an H _ CAN message; the P _ CAN message comprises a speed signal of each wheel, a brake master cylinder oil pressure signal, a brake pedal switch signal, a gear shifting signal, a vehicle speed signal, an ignition switch signal and an engine starting request signal; the H _ CAN message comprises a battery signal, a rotating speed signal of a driving motor and a rotating speed signal of an engine;
the second creating module is used for creating a rack CAN message of the test rack system, wherein the rack CAN message comprises the wheel side rotating speed of the dynamometer and the wheel side torque of the dynamometer;
the message integration module is used for integrating the whole vehicle CAN message and the rack CAN message to form a DBC file;
the simulation test module is used for analyzing the DBC file and performing simulation test on each working condition of the whole vehicle according to an analysis result to obtain a test result;
the message integration module is specifically configured to:
integrating the P _ CAN message with the rack CAN message to form a CAN1 message;
integrating the H _ CAN message with the rack CAN message to form a CAN2 message;
integrating the CAN1 message and the CAN2 message to form a DBC file;
the apparatus also includes a connection control module to:
determining a connection control strategy of the whole vehicle control unit and the test bed system according to an analysis result;
electrically connecting the whole vehicle low-voltage power supply circuit with the test bench system low-voltage power supply circuit according to the connection control strategy;
electrically connecting the double throttle circuits of the whole vehicle with the double throttle circuits of the test bed system according to the connection control strategy;
and respectively connecting a P _ CAN bus corresponding to the P _ CAN message with a CAN1 line on the test bench system and connecting an H _ CAN bus corresponding to the H _ CAN message with a CAN2 line on the test bench system according to the connection control strategy.
6. The utility model provides a whole car verification control equipment which characterized in that includes: the vehicle test control system comprises a memory and a processor, wherein at least one instruction is stored in the memory, and is loaded and executed by the processor to realize the vehicle test control method in any one of claims 1 to 4.
7. A computer-readable storage medium characterized by: the computer-readable storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the full vehicle test control method of any one of claims 1 to 4.
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| CN114598568B (en) * | 2022-03-15 | 2024-06-14 | 偌轮汽车科技(武汉)有限公司 | Wheel speed signal compression method and android platform indirect tire pressure monitoring program product |
| CN115277773B (en) * | 2022-07-28 | 2023-09-26 | 中国第一汽车股份有限公司 | Whole vehicle message processing method and device, vehicle and storage medium |
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