CN116793669A - Testing method, system and storage medium for dual clutch transmission - Google Patents
Testing method, system and storage medium for dual clutch transmission Download PDFInfo
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Abstract
The invention discloses a testing method, a testing system and a storage medium of a dual clutch transmission. The method comprises the following steps: the hardware-in-loop equipment switches and collects a calculation model and an active test model according to an upper computer test sequence; under the condition that the acquisition calculation model is switched to an active test model, the hardware calculates first shifting fork positions of a plurality of control stages through the active test model in ring equipment, and sends the first shifting fork positions to a control unit; the control unit determines a theoretical current curve according to the positions of the first shifting forks; and the control unit acquires the current of the shifting solenoid valve, and determines a shifting fork position test result of the dual clutch transmission according to the current of the shifting solenoid valve and the theoretical current curve. And acquiring a calculation model and an active test model to obtain a current and theoretical current curve of the gear shifting electromagnetic valve, determining a shifting fork position test result of the dual-clutch transmission according to the current and theoretical current curve, and realizing accurate control test of the gear shifting process of the dual-clutch transmission.
Description
Technical Field
The invention relates to the technical field of ring test, in particular to a test method, a test system and a storage medium of a dual clutch transmission.
Background
In the current development process of automobile ECU software, the control logic of gear shifting and gear shifting of a gearbox is required to be tested, so that the actual situation of a controller under various working conditions is obtained, and the quality of control unit software is ensured by a testing means.
In the prior art, a gearbox assembly is generally adopted for testing, all the testing methods are real loads, and the testing result is the current actual occurrence condition.
However, the testing method for testing the gearbox assembly cannot cover all working conditions, particularly abnormal working conditions, and is not suitable for testing the related functions of accurate control.
Disclosure of Invention
The invention provides a testing method, a testing system and a storage medium of a dual clutch transmission, which are used for solving the technical problem that the testing method in the prior art cannot accurately control the testing of related functions.
According to an aspect of the present invention, there is provided a method of testing a dual clutch transmission, comprising:
the hardware-in-loop equipment switches and collects a calculation model and an active test model according to an upper computer test sequence;
under the condition that the acquisition calculation model is switched to an active test model, the hardware calculates first shifting fork positions of a plurality of control stages through the active test model in ring equipment, and sends the first shifting fork positions to a control unit;
the control unit determines a theoretical current curve according to the positions of the first shifting forks;
and the control unit acquires the current of the shifting solenoid valve, and determines a shifting fork position test result of the dual clutch transmission according to the current of the shifting solenoid valve and the theoretical current curve.
The embodiment of the invention also provides a testing system of the dual clutch transmission, which comprises:
the hardware-in-loop equipment is used for switching and collecting a calculation model and an active test model according to the test sequence of the upper computer;
under the condition that the acquisition calculation model is switched to the active test model, the hardware-in-the-loop equipment is used for calculating first shifting fork positions of a plurality of control stages through the active test model and sending the first shifting fork positions to the control unit;
the control unit is used for determining a theoretical current curve according to the positions of the plurality of first shifting forks;
and the control unit is used for collecting the current of the gear shifting electromagnetic valve and determining a shifting fork position test result of the dual clutch transmission according to the current of the gear shifting electromagnetic valve and the theoretical current curve.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a method of testing a dual clutch transmission according to any one of the embodiments of the present invention.
According to the technical scheme, a shifting solenoid valve current and theoretical current curve is obtained through a collection calculation model and an active test model, and a shifting fork position test result of the dual clutch transmission is determined according to the shifting solenoid valve current and theoretical current curve. The problem that the test of related functions cannot be accurately controlled because the upper computer control software and the TCU are in interaction with each other and the time for taking off and taking on is short and the acquisition of derivative data is delayed is solved, and the accurate control test of the double-clutch gearbox during the gear taking and taking process can be realized.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of testing a dual clutch transmission according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method of testing a dual clutch transmission according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a testing system of a dual clutch transmission according to a third embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a testing method of a dual clutch transmission according to an embodiment of the present invention, where the method may be performed by a testing system of a dual clutch transmission, the testing system of the dual clutch transmission may be implemented in hardware and/or software, and the testing method of the dual clutch transmission may be implemented in a computer device. As shown in fig. 1, the method includes:
s110, the hardware-in-the-loop equipment switches the acquisition calculation model and the active test model according to the upper computer test sequence.
The hardware-in-loop device may be a computer device that performs hardware-in-loop testing. The upper computer test sequence can be used for testing the required test cases in a hardware-in-the-loop manner. The upper computer test sequence construction, model parameter modification, evaluation index construction and the like are realized through upper computer test sequence software. In the process of setting up an upper computer test sequence, when an active test model is required to be used for calling, calibration parameters are required to be configured in advance, and the calibration parameters are generally written in an initial stage of automatic sequence execution, and specific switching time can be determined according to the current test requirement.
The acquisition calculation model can be a hardware-in-loop equipment acquisition current hardware simulation model calculation based on controller feedback current, the hardware-in-loop equipment is used for acquiring shift solenoid valve current, the shift solenoid valve current is abstracted into shift pressure applied to a virtual synchronizer according to preset gearbox parameters, comprehensive stress and running speed of the synchronizer and the shifting fork are calculated according to damping simulation of each stage of movement of the synchronizer and the shifting fork, the actual position of the shifting fork is obtained through integral operation, and the calculated shifting fork signal model is output to the controller.
The active test model is used for simulating shifting fork movement tracks of each shift-off or shift-on control stage in the control unit under different calibration parameters.
Specifically, the hardware-in-loop device switches between a collection calculation model and an active test model according to an upper computer test sequence, including:
the hardware executes an upper computer test sequence on the ring equipment to acquire a switching signal;
and modifying parameters corresponding to the zone bit in the calling model by the hardware-in-loop equipment according to the switching signal so as to perform the switching operation of collecting the quality inspection of the calculation model and the active test model.
The switching signal is a signal corresponding to a switching time in the upper computer test sequence, and the hardware can correspondingly modify parameters of the flag bit in the calling model under the condition that the ring equipment detects the switching signal so as to realize model switching.
And S120, under the condition that the acquisition calculation model is switched to the active test model, the hardware calculates first shifting fork positions of a plurality of control stages through the active test model in the loop equipment, and sends the first shifting fork positions to the control unit.
The control phase can be a calibration parameter of the active test model, the number of the control phases can be selected based on the requirement of the target control phase, and in the whole control process, when the speed and the acceleration between different control phases are independently changed, the number of the control phases is increased by 1, namely the current control phase is the 2 nd control phase, and if the speed or the acceleration is changed, the control phase is increased by 1 to be changed into the 3 rd control phase. If the speed and acceleration are changed simultaneously in the front and rear control phases, the control phase number control phase is still incremented by 1.
Specifically, the hardware calculates a first shift fork position of a plurality of control stages through an active test model in the ring equipment, and sends the first shift fork position to the control unit, including:
for each control stage, the hardware-in-the-loop equipment calculates a first shifting fork position corresponding to the ending time of the current control stage according to the shifting fork position at the model switching time, the shifting fork position changed in the previous control stage, the target shifting fork speed initial value of the current control stage, the shifting fork acceleration of the current control stage and the time step.
Specifically, when the acquisition and calculation model is switched to the active test model, the shift fork position value calculated by the current acquisition model is inherited, and the shift fork motion speed and acceleration in the active test model are used for calculating the shift fork action and position.
The shift fork position at the time of model switching may be a shift fork position at the time of switching from the acquisition calculation model to the active test model, if the operation of switching from the acquisition calculation model to the active test model is performed when the shift fork position of the acquisition calculation model is N, then N is the shift fork position at the time of model switching. The shift fork position changed in the previous control stage may be a difference between an initial position and an end position of the shift fork position in the previous control stage, for example, in the process of executing the third control stage, the shift fork position changed in the previous control stage is a difference between an initial time shift fork position and an end time shift fork position in the second control stage. The target shift fork speed initial value of the current control stage can inherit the shift fork speed at the end time of the previous stage, namely, the shift fork speed at the end position of the previous stage is used as the shift fork speed initial value of the current control stage. For example, when the second control stage is switched to the third control stage, the initial value of the fork speed at the end of the second control stage may be used as the initial value of the fork speed in the third control stage. The shifting fork acceleration and time step in the current control stage can be determined according to the actual gear-taking operation period in the target test controller.
The calibration parameters of the active test model comprise the number of target control stages, and the shifting fork speed and shifting fork acceleration of each target control stage.
The control phase of the gear-off or gear-on may include the following control phases: (1) controlling the shifting fork movement speed to be in a target control range, adjusting target current output by a controller in a closed loop manner, and automatically adding and subtracting command current by the controller; (2) controlling the shifting fork movement acceleration to be in a target control range, adjusting target current output by a controller in a closed loop manner, and automatically adding and subtracting command current by the controller; (3) according to the actual position movement position of the shifting fork or the synchronous rotating speed state of the shifting shaft, the target current of the controller is regulated in an open loop or closed loop mode, and the controller automatically increases and decreases command current and calculates a current compensation value according to the position, the target rotating speed conversion state and the whole vehicle control state (accelerator, temperature and the like).
When the control type is (1), presetting multi-section shifting fork control at different speeds according to the test requirement, and testing the correctness of the output current of the controller under different parameters. In this state, the fork acceleration is set to 0.
When the control type is (2), presetting multi-section shifting fork control of different accelerations according to the test requirement, and testing the correctness of the output current of the controller under different parameters. And the initial fork speed is set in this state according to the test requirements.
When the control type is (3), the accuracy of the output current of the controller under different parameters can be tested under different working conditions by approaching the target position or rotating speed from different directions and speeds or accelerations through the combination of speed and acceleration control according to the test requirement.
Specifically, the active test model can be calculated based on a hardware-in-loop equipment current acquisition hardware simulation model of current fed back by the controller, the current of the shifting solenoid valve is acquired through the hardware-in-loop equipment, the current is abstracted into the shifting pressure applied to the virtual synchronizer according to preset gearbox parameters, the comprehensive stress and the running speed of the synchronizer and the shifting fork are calculated according to damping simulation of each stage of the movement of the synchronizer and the shifting fork, the actual position of the shifting fork is obtained through integral operation, and the calculated shifting fork signal is output to the controller.
Specifically, taking gear engagement as an example, the active test model is switched by a normal acquisition calculation model, after switching, shifting fork position output can be performed according to the following formula, and taking a second-stage shifting fork position (forward stroke) control stage as an example, the output is as follows:
ForkPostionPhase2＝ForkPostionStart+ΔForkPostionPhase1+∫(ForkSpeedPhase2+∫ForkSpeedAccPhase2 dt)dt
the fork position of the fork at the end of the second stage is represented by fork position of fork position phase2, fork position of fork position phase2 at the end of the second stage is represented by fork position of fork position phase2 at the end of the second stage, fork speed of fork position 2 at the last point of phase1 can be inherited through a calibration switch, and dt is a time step, so that the operation period of actual gear picking and shifting in a target test controller is consistent according to the actual gear picking and shifting operation period in the target test controller, and the consistency of operation is ensured.
The hardware in-loop equipment performs signal conversion on the position of the first shifting fork through the analog sensor to obtain a first position signal corresponding to the position of the first shifting fork, and sends the first position signal to the control unit.
Specifically, the hardware performs signal conversion on the first shift fork position by the ring device through the analog sensor to obtain a first position signal corresponding to the first shift fork position, and specifically may be that after the ring device acquires the first shift fork position information, the hardware converts the first shift fork position information into a first position signal that can be identified by the control unit through the analog sensor, that is, into an analog signal that can represent the first position. After the conversion is completed, the hardware-in-the-loop device may send the converted position signal to the control unit.
S130, the control unit determines a theoretical current curve according to the positions of the plurality of first shifting forks.
The theoretical current curve is a current curve in an ideal state predicted by an active test model based on the number of target control stages, the fork speed and the fork acceleration of each target control stage.
Specifically, after receiving the position signals of the plurality of first fork positions, the control unit may determine the theoretical current curve according to the received position signals of the plurality of first fork positions.
And S140, the control unit collects the current of the gear shifting electromagnetic valve, and determines a shifting fork position test result of the dual clutch transmission according to the current of the gear shifting electromagnetic valve and the theoretical current curve.
Specifically, according to a current and theoretical current curve of a gear shifting electromagnetic valve, determining a shifting fork position test result of the dual clutch transmission comprises the following steps:
determining a target control current of a set control stage according to a theoretical current curve;
specifically, after the theoretical current curve is obtained, the target control current of each set control stage may be determined according to information included in the theoretical current curve.
And comparing the current of the gear shifting electromagnetic valve with the target control current, and determining whether the current of the gear shifting electromagnetic valve of the dual clutch transmission is reasonable or not according to the comparison result.
Specifically, after the actual shift solenoid valve current and the target control current are obtained, the difference values of the actual shift solenoid valve current and the target control current can be compared in a mode, if the difference values do not accord with the range of the preset difference values, the shift solenoid valve current of the dual clutch transmission is determined to be unreasonable, and if the difference values accord with the range of the preset difference values, the shift solenoid valve current of the dual clutch transmission is determined to be reasonable.
According to the technical scheme, under the condition that an acquisition calculation model is switched to an active test model, hardware calculates first shifting fork positions of a plurality of control stages through the active test model in ring equipment, and sends the first shifting fork positions to a control unit; the control unit determines a theoretical current curve according to the positions of the first shifting forks; and the control unit collects the current of the shifting solenoid valve, and determines the shifting fork position test result of the dual clutch transmission according to the current of the shifting solenoid valve and the theoretical current curve. The problem that the test of related functions cannot be accurately controlled because the time required by interaction of upper computer control software and TCU is more and the time for taking off and taking on is very short is solved, and the acquisition of derivative data is delayed is solved, so that the accurate control test of the double-clutch gearbox during the gear taking off and taking on process can be realized, and the accuracy of the test of the double-clutch gearbox during the gear taking off and taking on process is improved.
Example two
Fig. 2 is a flowchart of a testing method of a dual clutch transmission according to a second embodiment of the present invention, where the technical solution of the present embodiment is further refined on the basis of the technical solution, and specifically includes the following steps:
s210, the hardware-in-the-loop equipment switches the acquisition calculation model and the active test model according to the upper computer test sequence.
And S220, under the condition that the active test model is switched to the acquisition calculation model, the hardware acquires the shift solenoid valve current output by the control unit in loop equipment, calculates a second shifting fork position based on the shift solenoid valve current through the acquisition calculation model, and sends the second shifting fork position to the control unit.
Specifically, the hardware obtains the solenoid valve electric current of shifting that the control unit output at the ring equipment to calculate the second shift fork position based on solenoid valve electric current of shifting through gathering calculation model, include:
the hardware collects the current of the shifting electromagnetic valve output by the control unit in the ring equipment, and determines the shifting pressure applied to the virtual synchronizer according to the preset parameters of the gearbox and the current of the shifting electromagnetic valve.
Specifically, the hardware-in-loop device collects the current of the shift solenoid valve output by the control unit, which may be that the control unit sends the current value of the shift solenoid valve to the hardware-in-loop device, and the hardware-in-loop device receives the current value of the shift solenoid valve sent by the control unit. The method comprises the steps of determining a gear shifting pressure applied to a virtual synchronizer according to preset gear box parameters and gear shifting electromagnetic valve current, wherein after the ring device acquires the gear shifting electromagnetic valve current value sent by a control unit, the hardware can be used for matching the gear box parameters preset in the ring device according to the gear shifting electromagnetic valve current value, and determining the gear shifting pressure applied to the virtual synchronizer according to the preset gear box parameters and the gear shifting electromagnetic valve current.
The hardware-in-the-loop equipment determines the speed of the shifting fork according to the gear shifting pressure, the virtual synchronizer and damping simulation of each stage of shifting fork movement, and determines the position of the second shifting fork according to the speed of the shifting fork.
The hardware in-loop equipment performs signal conversion on the position of the second shifting fork through the analog sensor to obtain a second position signal corresponding to the position of the second shifting fork, and sends the second position signal to the control unit.
Specifically, the acquisition calculation model can acquire the current of the shifting solenoid valve through hardware in-loop equipment, abstract the current into the shifting pressure applied to the virtual synchronizer according to preset gearbox parameters, calculate the comprehensive stress and the running speed of the synchronizer and the shifting fork according to damping simulation of each stage of the movement of the synchronizer and the shifting fork, and obtain the actual position of the shifting fork, namely the position of the second shifting fork through integral operation. After the second shifting fork position is obtained, the hardware-in-the-loop equipment can perform signal conversion on the second shifting fork position through the analog sensor to obtain a second position signal corresponding to the second shifting fork position, and the second position signal is sent to the control unit.
S230, the control unit adjusts the current of the gear shifting electromagnetic valve according to the position of the second shifting fork.
Specifically, the control unit adjusts the current of the shift solenoid valve according to the second shift fork position, and may be configured to perform an adjustment operation on the current of the shift solenoid valve by comparing a value of a preset shift fork position with a value of the second shift fork position after receiving the second shift fork position signal.
S240, the control unit collects the current of the gear shifting electromagnetic valve, and determines a shifting fork position test result of the dual clutch transmission according to the current of the gear shifting electromagnetic valve and the theoretical current curve.
Specifically, according to a current and theoretical current curve of a gear shifting electromagnetic valve, determining a shifting fork position test result of the dual clutch transmission comprises the following steps:
determining a target control current of a set control stage according to a theoretical current curve;
and comparing the current of the gear shifting electromagnetic valve with the target control current, and determining whether the current of the gear shifting electromagnetic valve of the dual clutch transmission is reasonable or not according to the comparison result.
According to the technical scheme, under the condition that an active test model is switched to an acquisition calculation model, hardware acquires a shifting solenoid valve current output by a control unit in loop equipment, calculates a second shifting fork position based on the shifting solenoid valve current through the acquisition calculation model, sends the second shifting fork position to the control unit, and the control unit adjusts the shifting solenoid valve current according to the second shifting fork position. The method can provide more accurate shifting solenoid valve current for testing the double-clutch transmission and improve the testing accuracy of the double-clutch transmission.
Example III
Fig. 3 is a schematic structural diagram of a testing system for a dual clutch transmission according to a third embodiment of the present invention. As shown in fig. 3, the system includes:
the hardware-in-loop equipment is used for switching and collecting a calculation model and an active test model according to the test sequence of the upper computer;
under the condition that the acquisition calculation model is switched to the active test model, the hardware-in-the-loop equipment is used for calculating first shifting fork positions of a plurality of control stages through the active test model and sending the first shifting fork positions to the control unit;
the hardware-in-loop equipment is used for acquiring the current of the shifting electromagnetic valve output by the control unit under the condition that the active test model is switched to the acquisition calculation model, calculating a second shifting fork position based on the current of the shifting electromagnetic valve through the acquisition calculation model, and sending the second shifting fork position to the control unit;
the control unit is used for determining a theoretical current curve according to the positions of the plurality of first shifting forks;
the control unit is used for adjusting the current of the gear shifting electromagnetic valve according to the position of the second shifting fork;
and the control unit is used for collecting the current of the gear shifting electromagnetic valve and determining a shifting fork position test result of the dual clutch transmission according to the current of the gear shifting electromagnetic valve and the theoretical current curve.
Optionally, the hardware in-loop device includes:
the analog sensor is used for converting signals of the first shifting fork position and the second shifting fork position;
and the virtual synchronizer is used for simulating the synchronizer of the double-clutch transmission.
Optionally, the hardware-in-loop device is further configured to obtain a shift solenoid valve current output by the control unit when the active test model is switched to the acquisition calculation model, calculate a second shift fork position based on the shift solenoid valve current through the acquisition calculation model, and send the second shift fork position to the control unit;
the control unit is also used for adjusting the current of the gear shifting electromagnetic valve according to the position of the second shifting fork.
Optionally, the hardware in the ring device is specifically configured to:
executing the upper computer test sequence to obtain a switching signal;
and modifying parameters corresponding to the zone bit in the calling model according to the switching signal so as to perform the switching operation of collecting the quality inspection of the calculation model and the active test model.
Optionally, the hardware-in-loop device is further specifically configured to:
for each control stage, calculating a first shifting fork position corresponding to the ending time of the current control stage according to the shifting fork position at the model switching time, the shifting fork position changed in the previous control stage, the target shifting fork speed initial value of the current control stage, the shifting fork acceleration of the current control stage and the time step;
and performing signal conversion on the first shifting fork position through an analog sensor to obtain a first position signal corresponding to the first shifting fork position, and sending the first position signal to the control unit.
Optionally, the control unit is specifically configured to:
determining a target control current of a set control stage according to the theoretical current curve;
and comparing the shifting electromagnetic valve current with the target control current, and determining whether the shifting electromagnetic valve current of the dual clutch transmission is reasonable or not according to the comparison result.
Optionally, the hardware in the ring device is specifically further configured to:
acquiring a shifting electromagnetic valve current output by the control unit, and determining a shifting pressure applied to a virtual synchronizer according to preset gearbox parameters and the shifting electromagnetic valve current;
determining a shifting fork speed according to the gear shifting pressure, the virtual synchronizer and damping simulation of each shifting fork movement stage, and determining a second shifting fork position according to the shifting fork speed;
and performing signal conversion on the second shifting fork position through an analog sensor to obtain a second position signal corresponding to the second shifting fork position, and sending the second position signal to the control unit.
Optionally, the method comprises:
the active test model is used for simulating shifting fork motion tracks of all shift-off or shift-on control stages in the control unit under different calibration parameters, wherein the calibration parameters of the active test model comprise the number of target control stages, shifting fork speeds and shifting fork accelerations of all target control stages.
The testing system of the dual clutch transmission provided by the embodiment of the invention can execute the testing method of the dual clutch transmission provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of testing a dual clutch transmission, comprising:
the hardware-in-loop equipment switches and collects a calculation model and an active test model according to an upper computer test sequence;
under the condition that the acquisition calculation model is switched to an active test model, the hardware calculates first shifting fork positions of a plurality of control stages through the active test model in ring equipment, and sends the first shifting fork positions to a control unit;
the control unit determines a theoretical current curve according to the positions of the first shifting forks;
and the control unit acquires the current of the shifting solenoid valve, and determines a shifting fork position test result of the dual clutch transmission according to the current of the shifting solenoid valve and the theoretical current curve.
2. The method of claim 1, further comprising, after the hardware-in-the-loop device switches the acquisition computation model and the active test model according to the upper computer test sequence:
under the condition that the active test model is switched to the acquisition calculation model, the hardware acquires the current of the shifting electromagnetic valve output by the control unit in loop equipment, calculates a second shifting fork position based on the current of the shifting electromagnetic valve through the acquisition calculation model, and sends the second shifting fork position to the control unit;
the control unit adjusts the current of the gear shifting electromagnetic valve according to the position of the second shifting fork.
3. The method of claim 1, wherein the hardware switches between the acquisition computing model and the active test model at the ring device according to the upper computer test sequence, comprising:
the hardware executes the upper computer test sequence in the ring equipment to acquire a switching signal;
and modifying parameters corresponding to the zone bit in the calling model by the hardware-in-loop equipment according to the switching signal so as to perform the switching operation of collecting the quality inspection of the calculation model and the active test model.
4. The method of claim 1, wherein the hardware calculates a first fork position for a number of control phases at a ring device via the active test model, and sends the first fork position to a control unit, comprising:
for each control stage, the hardware calculates a first shifting fork position corresponding to the ending time of the current control stage according to the shifting fork position of the model switching time, the shifting fork position changed in the previous control stage, the target shifting fork speed initial value of the current control stage, the shifting fork acceleration of the current control stage and the time step;
the hardware performs signal conversion on the first shifting fork position through an analog sensor in the ring equipment to obtain a first position signal corresponding to the first shifting fork position, and sends the first position signal to the control unit.
5. The method of claim 1, wherein determining a shift fork position test result of the dual clutch transmission based on the shift solenoid current and the theoretical current profile comprises:
determining a target control current of a set control stage according to the theoretical current curve;
and comparing the shifting electromagnetic valve current with the target control current, and determining whether the shifting electromagnetic valve current of the dual clutch transmission is reasonable or not according to the comparison result.
6. The method of claim 1, wherein the hardware obtains a shift solenoid current output by the control unit at a loop device and calculates a second shift fork position based on the shift solenoid current through the acquisition calculation model, comprising:
the hardware acquires the current of the shifting electromagnetic valve output by the control unit in the ring equipment, and determines the shifting pressure applied to the virtual synchronizer according to preset gearbox parameters and the current of the shifting electromagnetic valve;
the hardware-in-the-loop equipment determines a shifting fork speed according to the gear shifting pressure, the virtual synchronizer and damping simulation of each shifting fork movement stage, and determines a second shifting fork position according to the shifting fork speed;
the hardware performs signal conversion on the second shifting fork position through an analog sensor in the ring equipment to obtain a second position signal corresponding to the second shifting fork position, and sends the second position signal to the control unit.
7. The method according to claim 1, characterized in that it comprises:
the active test model is used for simulating shifting fork motion tracks of all shift-off or shift-on control stages in the control unit under different calibration parameters, wherein the calibration parameters of the active test model comprise the number of target control stages, shifting fork speeds and shifting fork accelerations of all target control stages.
8. A test system for a dual clutch transmission, comprising:
the hardware-in-loop equipment is used for switching and collecting a calculation model and an active test model according to the test sequence of the upper computer;
under the condition that the acquisition calculation model is switched to the active test model, the hardware-in-the-loop equipment is used for calculating first shifting fork positions of a plurality of control stages through the active test model and sending the first shifting fork positions to the control unit;
the control unit is used for determining a theoretical current curve according to the positions of the plurality of first shifting forks;
and the control unit is used for collecting the current of the gear shifting electromagnetic valve and determining a shifting fork position test result of the dual clutch transmission according to the current of the gear shifting electromagnetic valve and the theoretical current curve.
9. The system of claim 8, wherein the hardware-in-the-loop device comprises:
the analog sensor is used for converting signals of the first shifting fork position and the second shifting fork position;
and the virtual synchronizer is used for simulating the synchronizer of the double-clutch transmission.
10. A computer readable storage medium storing computer instructions for causing a processor to execute the method of testing a dual clutch transmission according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778263.4A CN116793669A (en) | 2023-06-28 | 2023-06-28 | Testing method, system and storage medium for dual clutch transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778263.4A CN116793669A (en) | 2023-06-28 | 2023-06-28 | Testing method, system and storage medium for dual clutch transmission |
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| CN116793669A true CN116793669A (en) | 2023-09-22 |
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| CN202310778263.4A Pending CN116793669A (en) | 2023-06-28 | 2023-06-28 | Testing method, system and storage medium for dual clutch transmission |
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