CN114211927A - Electromagnetic valve control method, device and equipment based on air suspension and storage medium - Google Patents
Electromagnetic valve control method, device and equipment based on air suspension and storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0525—Height adjusting or levelling valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
- B60G2400/252—Stroke; Height; Displacement vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/204—Pressure regulating valves for air-springs
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Abstract
The invention relates to the technical field of electrical control, and discloses an electromagnetic valve control method, device, equipment and storage medium based on an air suspension, wherein the method comprises the following steps: obtaining target pressure information of the air spring in a load state according to the current height and height pressure characteristic information; generating the gas quantity to be charged and discharged through the flow characteristic information, the target pressure information and the target height of the air spring; generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of gas to be charged and discharged; compared with the prior art that the electromagnetic valve is controlled through the system state, the efficiency and the accuracy of controlling the electromagnetic valve can be effectively improved, and prediction support is provided for the phenomena of over-charging, over-discharging and frequent gas charging and discharging.
Description
Technical Field
The invention relates to the technical field of electrical control, in particular to an electromagnetic valve control method, device, equipment and storage medium based on an air suspension.
Background
At present, large commercial vehicles, luxury passenger vehicles and other vehicle models are often equipped with an electric Control air suspension system, and the air springs are inflated and deflated through electromagnetic valves to Control the height of the vehicle body during the working process, while the existing mode of controlling the electromagnetic valves often transmits real-time height signals to an Electronic Control Unit (ECU), so that the ECU compares the current height with the target height, and controls the electromagnetic valves to inflate and deflate according to the height difference, but the duty ratio of the electromagnetic valves depends on the height difference, the above mode lacks the prediction of inflation quantity, and further cannot predict the Control action, because the influence of calculation speed and response speed, calculation and Control lag behind state recognition, the action is started or stopped after the time when a certain action should be started or stopped, and thus the adverse phenomena of over-inflation, over-deflation, frequent inflation and deflation occur, resulting in lower efficiency and accuracy in the final control of the solenoid valve.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an electromagnetic valve control method, device, equipment and storage medium based on an air suspension, and aims to solve the technical problems that the efficiency and accuracy of controlling an electromagnetic valve are low and prediction support cannot be provided for the phenomena of overcharge, overdischarge and frequent gas charging and discharging in the prior art.
In order to achieve the aim, the invention provides an electromagnetic valve control method based on an air suspension, which comprises the following steps:
determining the load state of the air spring according to the current height and the current air pressure information;
obtaining target pressure information of the air spring in the load state according to the current height and height pressure characteristic information;
generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring;
and generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal.
Optionally, the determining the load state of the air spring according to the current height and the current air pressure information includes:
constructing a corresponding flow-pressure-height model according to the flow characteristic information of the air spring;
constructing a corresponding flow-pressure-duty ratio model according to the flow characteristic information of the electromagnetic valve;
and calculating the current height and the current air pressure information through a flow-pressure-height model and a flow-pressure-duty ratio model to obtain the load state of the air spring.
Optionally, the obtaining target pressure information of the air spring in the load state according to the current height and the target height includes:
calculating the current height according to the height pressure characteristic information to obtain current pressure information;
obtaining a corresponding internal pressure set according to the height pressure characteristic information;
and performing linear interpolation on the current pressure information and the internal pressure set to obtain target pressure information of the air spring in the load state.
Optionally, the generating a gas amount to be charged and discharged through the flow characteristic information, the target pressure information, and the target height of the air spring includes:
performing difference calculation on the current height and the target height to obtain a corresponding height change value;
determining the flow required by lifting unit height according to the flow characteristic information of the air spring;
and accumulating and calculating the height change value and the flow required by the lifting unit height through a target circulating calculation strategy and target pressure information to obtain the amount of gas to be charged and discharged.
Optionally, the generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal includes:
calculating the gas quantity to be charged and discharged according to the flow characteristic information of the electromagnetic valve to obtain the current charging and discharging air-to-air ratio and the current cycle number;
and generating a target PWM control signal according to the current charging and discharging air-to-air ratio and the current cycle number, and controlling the electromagnetic valve based on the target PWM control signal.
Optionally, the calculating the amount of the gas to be charged and discharged according to the flow characteristic information of the electromagnetic valve to obtain the current charge and discharge air-to-air ratio and the current cycle number includes:
acquiring a target duty ratio set of the solenoid valve;
calculating the target duty ratio set according to the flow characteristic information of the electromagnetic valve to obtain a corresponding flow set;
comparing the flow in the flow set with the gas amount to be charged and discharged to obtain the corresponding duty ratio number;
and comparing the duty ratio number with preset control time to obtain the current charge-discharge air-to-air ratio and the current cycle number.
Optionally, the generating a target PWM control signal according to the current charge-discharge air-to-air ratio and the current cycle number, and controlling the electromagnetic valve based on the target PWM control signal includes:
acquiring the current single cycle number, and obtaining the corresponding cycle length according to the current single cycle number and the current cycle number;
obtaining a corresponding initial period and a corresponding end period according to the current period number;
generating a target PWM control signal according to the current charging and discharging air-to-air ratio, the period length, the initial period and the ending period;
when the target PWM control signal is a target PWM opening signal, controlling the opening of a channel of the electromagnetic valve;
and when the target PWM control signal is a target PWM closing signal, controlling the passage of the electromagnetic valve to be closed.
In addition, in order to achieve the above object, the present invention further provides an air suspension-based solenoid valve control device, including:
the determining module is used for determining the load state of the air spring according to the current height and the current air pressure information;
the acquisition module is used for acquiring target pressure information of the air spring in the load state according to the current height and height pressure characteristic information;
the generating module is used for generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring;
and the control module is used for generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the gas amount to be charged and discharged and controlling the electromagnetic valve based on the target PWM control signal.
In addition, in order to achieve the above object, the present invention also provides an air suspension-based electromagnetic valve control apparatus, including: a memory, a processor, and an air suspension based solenoid valve control program stored on the memory and executable on the processor, the air suspension based solenoid valve control program configured to implement the air suspension based solenoid valve control method as described above.
In addition, in order to achieve the above object, the present invention further provides a storage medium having an air suspension-based solenoid valve control program stored thereon, wherein the air suspension-based solenoid valve control program, when executed by a processor, implements the air suspension-based solenoid valve control method as described above.
The invention provides an electromagnetic valve control method based on an air suspension, which is characterized in that the load state of an air spring is determined according to the current height and the current air pressure information; obtaining target pressure information of the air spring in the load state according to the current height and height pressure characteristic information; generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring; generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal; compared with the prior art that the electromagnetic valve is controlled through the system state, the efficiency and the accuracy of controlling the electromagnetic valve can be effectively improved, and prediction support is provided for the phenomena of over-charging, over-discharging and frequent gas charging and discharging.
Drawings
FIG. 1 is a schematic structural diagram of an air suspension-based solenoid valve control device for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the electromagnetic valve control method based on the air suspension according to the present invention;
FIG. 3 is a schematic overall flow chart of an embodiment of the method for controlling the solenoid valve based on the air suspension according to the present invention;
FIG. 4 is a schematic flow chart of a second embodiment of the electromagnetic valve control method based on the air suspension;
FIG. 5 is a schematic inflation diagram of an embodiment of the solenoid valve control method based on air suspension according to the present invention;
FIG. 6 is a schematic flow chart of a third embodiment of the electromagnetic valve control method based on the air suspension according to the present invention;
FIG. 7 is a schematic flow chart illustrating the flow rate variation of an embodiment of the electromagnetic valve control method based on the air suspension according to the present invention;
fig. 8 is a functional module schematic diagram of a first embodiment of the electromagnetic valve control device based on the air suspension.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air suspension-based solenoid valve control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the air suspension-based solenoid valve control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of an air suspension based solenoid valve control device and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a solenoid valve control program based on an air suspension.
In the air suspension-based solenoid valve control apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with the network integrated platform workstation; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the air suspension-based solenoid valve control device of the present invention may be provided in an air suspension-based solenoid valve control device that calls an air suspension-based solenoid valve control program stored in the memory 1005 through the processor 1001 and executes the air suspension-based solenoid valve control method provided by the embodiment of the present invention.
Based on the hardware structure, the embodiment of the electromagnetic valve control method based on the air suspension is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the electromagnetic valve control method based on the air suspension according to the present invention.
In a first embodiment, the air suspension-based solenoid valve control method comprises the steps of:
and step S10, determining the load state of the air spring according to the current height and the current air pressure information.
It should be noted that the execution subject of the present embodiment is a solenoid valve control device based on an air suspension, and may also be other devices that can achieve the same or similar functions, such as a solenoid valve controller, etc., and the present embodiment is not limited to this, and in the present embodiment, the solenoid valve controller is taken as an example for description.
It should be understood that the current height refers to the height at which the air spring is currently located, and the current air pressure information refers to the air pressure information that the air spring is subjected to at the current height, and the current air pressure information includes information of air pressure, air pressure direction and the like.
It can be understood that the load state refers to a load loading state where the air spring is located under the current height and current air pressure information, the load state can reflect the load condition of the air spring, and after the current height and current air pressure information is obtained, the load state of the air spring under the current condition is detected through models of the air spring and the electromagnetic valve.
Further, step S10 includes: constructing a corresponding flow-pressure-height model according to the flow characteristic information of the air spring; constructing a corresponding flow-pressure-duty ratio model according to the flow characteristic information of the electromagnetic valve; and calculating the current height and the current air pressure information through a flow-pressure-height model and a flow-pressure-duty ratio model to obtain the load state of the air spring.
It should be understood that the flow-pressure-height model refers to a model constructed by mapping relationships between the flow, pressure and height of the air spring, and the flow characteristic information of the air spring includes: the flow-pressure-duty ratio model refers to a model constructed by mapping relations among flow, pressure and duty ratio of the electromagnetic valve.
It can be understood that after the flow-pressure-height model and the flow-pressure-duty ratio model are constructed, the current height and the current air pressure of the air spring are calculated through the flow-pressure-height model and the flow-pressure-duty ratio model to obtain the load state of the air spring under the current condition, wherein the load state corresponds to the current height.
And step S20, obtaining target pressure information of the air spring in the load state according to the current height and the target height.
It can be understood that the target height refers to a height of the air spring after being adjusted, and the target pressure information refers to pressure information borne by the air spring under the target height and a load state, that is, internal pressure borne by the air spring under the same load and different heights, and changes of the internal pressure caused by height changes under the load corresponding to different internal pressures.
Further, step S20 includes: calculating the current height according to the height pressure characteristic information to obtain current pressure information; obtaining a corresponding internal pressure set according to the height pressure characteristic information; and performing linear interpolation on the current pressure information and the internal pressure set to obtain target pressure information of the air spring in the load state.
It should be understood that the current pressure information refers to pressure information that the air spring bears under the current height and the load state, the height pressure characteristic information refers to characteristic information between the design height and the pressure of the air spring, when any one condition in the height pressure characteristic information is known, another condition can be found, for example, if the known condition is the current height, the found another condition is the pressure corresponding to the current height, and the corresponding pressure information is obtained through the pressure, and similarly, the internal pressure set corresponding to the design height is found through the height pressure characteristic information, that is, the internal pressures corresponding to the design heights under different standards are multiple.
It can be understood that after the current pressure information and the internal pressure set are obtained, linear interpolation is respectively performed on the current pressure information and each internal pressure in the internal pressure set to obtain target pressure information borne by the air spring at the target height under the condition that the load state is not changed.
And step S30, generating the gas amount to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring.
It should be understood that the amount of gas to be charged and discharged refers to the volume of the solenoid valve that needs to be charged or discharged, that is, when the current height is smaller than the target height, the solenoid valve needs to be controlled to charge, and when the current height is larger than the target height, the solenoid valve needs to be controlled to discharge, and the volume of the solenoid valve that needs to be charged or discharged is determined by the flow characteristic information, the target pressure information and the target height.
And step S40, generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the gas amount to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal.
It can be understood that the flow characteristic information of the solenoid valve refers to a characteristic curve between outlet pressure and outlet flow of the solenoid valve under a certain inlet pressure, the target PWM control signal refers to a signal for controlling the solenoid valve to open or close, after the amount of gas to be charged and discharged is obtained, the target PWM control signal is generated according to the flow characteristic information of the solenoid valve and the amount of gas to be charged and discharged, and then the closing of the solenoid valve is controlled by the PWM control signal.
It should be understood that, referring to fig. 3, fig. 3 is a schematic overall flow chart, and the specific flow chart is as follows: the method comprises the steps of obtaining the current height and the current high-pressure information of the air spring, obtaining target pressure intensity information of the target height with the equal load change value according to the current height, the current high-pressure information and the air spring design height pressure characteristic information, then generating the required gas quantity to be charged and discharged according to the target pressure intensity information, the flow characteristic information of the air spring and the target height, obtaining the corresponding duty ratio and the number of cycles according to the required gas quantity to be charged and discharged and the flow characteristic information of the electromagnetic valve, and finally generating a target PWM control signal according to the duty ratio and the number of cycles.
The load state of the air spring is determined according to the current height and the current air pressure information; obtaining target pressure information of the air spring in the load state according to the current height and height pressure characteristic information; generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring; generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal; compared with the prior art that the electromagnetic valve is controlled through the system state, the efficiency and the accuracy of controlling the electromagnetic valve can be effectively improved, and prediction support is provided for the phenomena of over-charging, over-discharging and frequent gas charging and discharging.
In an embodiment, as shown in fig. 4, the second embodiment of the electromagnetic valve control method based on air suspension according to the present invention is proposed based on the first embodiment, and the step S30 includes:
step S301, calculating the difference between the current height and the target height to obtain a corresponding height change value.
It should be understood that the height variation value refers to a value of a height variation of the air spring when the current height is adjusted to the target height, and the height variation value is obtained by a difference between the current height and the target height, for example, the current height of the air spring is L1, and the adjusted target height is L2, and the height variation Δ L is | L1-L2 |.
And step S302, determining the flow required by lifting unit height according to the flow characteristic information of the air spring.
It is understood that the flow rate refers to a flow rate required for the air spring to ascend or descend by one unit height under different loads, and when the current height is less than the target height, the flow rate is required for ascending by one unit height, and when the current height is greater than the target height, the flow rate is required for descending by one unit height, and the unit height may be 1 mm.
And step S303, accumulating and calculating the height change value and the flow required by the lifting unit height through a target circulation calculation strategy and target pressure information to obtain the amount of gas to be charged and discharged.
It should be understood that the target circulation calculation strategy refers to a strategy for circularly calculating the amount of the charge and discharge gas, after obtaining the flow rate required by the lifting unit height, a total flow rate value required from the current height to the target height is calculated by adding the height change value and the flow rate required by the lifting unit height, and then the amount of the gas to be charged and discharged is obtained by the total flow rate value, for example, the flow rate required by descending or ascending one unit height is m, and n unit heights are reached from the current height or descending to the target height, the number of the electromagnetic valves is p, and then the total flow rate value is m x n x p.
It can be understood that, with reference to fig. 5, fig. 5 is a schematic view of inflation, specifically: the air spring can lift 1mm of required inflation quantity under the conditions of different loads and different heights, the different loads are reflected by pressure intensity, the lifting height is determined by the current height and the target height of the air spring, and the parameter of the vertical coordinate is the inflation quantity required by lifting 1 mm.
In the embodiment, the corresponding height change value is obtained by performing difference calculation on the current height and the target height; determining the flow required by lifting unit height according to the flow characteristic information of the air spring; accumulating and calculating the height change value and the flow required by the lifting unit height through a target cyclic calculation strategy and target pressure information to obtain the amount of gas to be charged and discharged; according to the embodiment, the difference between the current height and the target height is calculated, the flow rate required by the lifting unit height is determined according to the flow rate characteristic information of the air spring, and the height change value and the flow rate required by the lifting unit height are accumulated and calculated through the target circulation calculation strategy, so that the accuracy of obtaining the gas amount to be charged and discharged can be effectively improved.
In an embodiment, as shown in fig. 6, the third embodiment of the electromagnetic valve control method based on air suspension according to the present invention is proposed based on the first embodiment, and the step S40 includes:
step S401, calculating the gas quantity to be charged and discharged according to the flow characteristic information of the electromagnetic valve to obtain the current charging and discharging air-to-air ratio and the current cycle number.
It can be understood that the current charge-discharge air-to-air ratio refers to a ratio between the charging or discharging time and the total time, the current cycle number refers to the number of cycles of charging or discharging, and after the amount of gas to be charged and discharged is obtained, the amount of gas to be charged and discharged is calculated through the flow characteristic information of the electromagnetic valve to obtain the corresponding current charge-discharge air-to-air ratio and the current cycle number.
Further, step S401 includes: acquiring a target duty ratio set of the solenoid valve; calculating the target duty ratio set according to the flow characteristic information of the electromagnetic valve to obtain a corresponding flow set; comparing the flow in the flow set with the gas amount to be charged and discharged to obtain the corresponding duty ratio number; and comparing the duty ratio number with preset control time to obtain the current charge-discharge air-to-air ratio and the current cycle number.
It should be understood that the set of target duty cycles refers to a set of air ratios common to solenoid valves, e.g., 40%, 60%, and 80% duty cycles when the solenoid valve is inflated, with air sources and air springs at the front and rear ends of the solenoid valve, and 60%, 80%, and 100% duty cycles when the solenoid valve is deflated, with air springs and atmosphere at the front and rear ends of the solenoid valve.
It can be understood that the flow set refers to a set composed of flows corresponding to duty ratios, the preset control time refers to time required for controlling the solenoid valve, after the target duty ratio set is obtained, the target duty ratio set is calculated through flow characteristic information of the solenoid valve to obtain the corresponding flow set, then the ratio of the flows in the flow set to the gas quantity to be charged and discharged is obtained, the duty ratio quantity can be obtained, and then when the duty ratio quantity is compared with the preset control time, the cycle quantity is rounded to obtain the most accurate current charging and discharging air-to-air ratio and the current cycle quantity.
And S402, generating a target PWM control signal according to the current charging and discharging air-to-air ratio and the current cycle number, and controlling the electromagnetic valve based on the target PWM control signal.
It should be understood that after the current charge-discharge air-to-air ratio and the current cycle number are obtained, a corresponding target PWM control signal is generated according to the current charge-discharge air-to-air ratio and the current cycle number, when the target PWM control signal is a target PWM on-signal, a channel of the electromagnetic valve is controlled to be on, and when the target PWM on-signal is a target PWM off-signal, the channel of the electromagnetic valve is controlled to be off.
Further, step S402 includes: acquiring the current single cycle number, and obtaining the corresponding cycle length according to the current single cycle number and the current cycle number; obtaining a corresponding initial period and a corresponding end period according to the current period number; generating a target PWM control signal according to the current charging and discharging air-to-air ratio, the period length, the initial period and the ending period; when the target PWM control signal is a target PWM opening signal, controlling the opening of a channel of the electromagnetic valve; and when the target PWM control signal is a target PWM closing signal, controlling the passage of the electromagnetic valve to be closed.
It is understood that the period length refers to a length of a continuous period of the control solenoid valve, for example, a single period number is a, a current period number is B, the period length is B/a, a start period refers to a start period in the current period number, and similarly, an end period refers to an end period in the current period number, and the setting time of the PWM control signal is calculated by the current charge/discharge air ratio and the period length, that is, the target PWM control signal is set to the target PWM on signal from the start period to the current charge/discharge air ratio period length, that is, the target PWM on signal is "0", and the signal is set to the target PWM off signal from the current charge/discharge air ratio period length to the end period, that is, the target PWM off signal is "1".
It should be understood that, after the target PWM control signal is obtained, it is determined whether the target PWM control signal is a target PWM on signal, if so, the channel of the electromagnetic valve is controlled to be opened, and if it is determined that the target PWM control signal is a target PWM off signal, the channel of the electromagnetic valve is controlled to be closed, and the main valve is controlled to be inflated or deflated.
It can be understood that, referring to fig. 7, fig. 7 is a schematic flow chart of flow rate change, specifically: the flow rate of the channel in a single period changes with the change of the pressure difference and the duty ratio, that is, when any one of the pressure difference or the duty ratio changes, the flow rate also changes, and the overall change condition of the flow rate can be reflected through fig. 7, wherein the flow rate includes three parameters, that is, the duty ratio, the flow rate in a single period and the pressure difference, and for example, the flow rate in a single period also increases with the decrease of the duty ratio and the increase of the pressure difference.
In this embodiment, the amount of the gas to be charged and discharged is calculated according to the flow characteristic information of the electromagnetic valve, so as to obtain the current charge and discharge air-to-air ratio and the current cycle number; generating a target PWM control signal according to the current charging and discharging air-to-air ratio and the current periodicity, and controlling the electromagnetic valve based on the target PWM control signal; according to the embodiment, the amount of gas to be charged and discharged is calculated through the flow characteristic information of the electromagnetic valve, then the target PWM control signal is generated according to the current charging and discharging air-to-air ratio and the current cycle number, and then the electromagnetic valve is controlled to be opened and closed through the target PWM control signal, so that the accuracy of the electromagnetic valve can be effectively improved.
Furthermore, an embodiment of the present invention further provides a storage medium, where the storage medium stores an air suspension-based solenoid valve control program, and the air suspension-based solenoid valve control program, when executed by a processor, implements the steps of the air suspension-based solenoid valve control method as described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
In addition, referring to fig. 8, an embodiment of the present invention further provides an air suspension-based solenoid valve control device, including:
and the determining module 10 is used for determining the load state of the air spring according to the current height and the current air pressure information.
And the obtaining module 20 is configured to obtain target pressure information of the air spring in the load state according to the current height and height pressure characteristic information.
And the generating module 30 is configured to generate the amount of gas to be charged and discharged according to the flow characteristic information of the air spring, the target pressure information, and the target height.
And the control module 40 is configured to generate a target PWM control signal according to flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and control the electromagnetic valve based on the target PWM control signal.
The load state of the air spring is determined according to the current height and the current air pressure information; obtaining target pressure information of the air spring in the load state according to the current height and height pressure characteristic information; generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring; generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal; compared with the prior art that the electromagnetic valve is controlled through the system state, the efficiency and the accuracy of controlling the electromagnetic valve can be effectively improved, and prediction support is provided for the phenomena of over-charging, over-discharging and frequent gas charging and discharging.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in this embodiment can be referred to the electromagnetic valve control method based on the air suspension provided by any embodiment of the present invention, and are not described herein again.
In an embodiment, the determining module 10 is further configured to construct a corresponding flow-pressure-height model according to the flow characteristic information of the air spring; constructing a corresponding flow-pressure-duty ratio model according to the flow characteristic information of the electromagnetic valve; and calculating the current height and the current air pressure information through a flow-pressure-height model and a flow-pressure-duty ratio model to obtain the load state of the air spring.
In an embodiment, the obtaining module 20 is further configured to calculate the current height according to the height pressure characteristic information to obtain current pressure information; obtaining a corresponding internal pressure set according to the height pressure characteristic information; and performing linear interpolation on the current pressure information and the internal pressure set to obtain target pressure information of the air spring in the load state.
In an embodiment, the generating module 30 is further configured to perform difference calculation on the current height and the target height to obtain a corresponding height variation value; determining the flow required by lifting unit height according to the flow characteristic information of the air spring; and accumulating and calculating the height change value and the flow required by the lifting unit height through a target circulating calculation strategy and target pressure information to obtain the amount of gas to be charged and discharged.
In an embodiment, the control module 40 is further configured to calculate the amount of the gas to be charged and discharged according to the flow characteristic information of the electromagnetic valve, so as to obtain a current charging and discharging air-to-air ratio and a current cycle number; and generating a target PWM control signal according to the current charging and discharging air-to-air ratio and the current cycle number, and controlling the electromagnetic valve based on the target PWM control signal.
In an embodiment, the control module 40 is further configured to obtain a target duty cycle set of the solenoid valve; calculating the target duty ratio set according to the flow characteristic information of the electromagnetic valve to obtain a corresponding flow set; comparing the flow in the flow set with the gas amount to be charged and discharged to obtain the corresponding duty ratio number; and comparing the duty ratio number with preset control time to obtain the current charge-discharge air-to-air ratio and the current cycle number.
In an embodiment, the control module 40 is further configured to obtain a current single cycle number, and obtain a corresponding cycle length according to the current single cycle number and the current cycle number; obtaining a corresponding initial period and a corresponding end period according to the current period number; generating a target PWM control signal according to the current charging and discharging air-to-air ratio, the period length, the initial period and the ending period; when the target PWM control signal is a target PWM opening signal, controlling the opening of a channel of the electromagnetic valve; and when the target PWM control signal is a target PWM closing signal, controlling the passage of the electromagnetic valve to be closed.
Other embodiments or methods of implementing the air suspension based solenoid operated valve control of the present invention are described with reference to the method embodiments described above and are not intended to be exhaustive herein.
Further, it is to 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 phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, an all-in-one platform workstation, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The electromagnetic valve control method based on the air suspension is characterized by comprising the following steps of:
determining the load state of the air spring according to the current height and the current air pressure information;
obtaining target pressure information of the air spring in the load state according to the current height and height pressure characteristic information;
generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring;
and generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged, and controlling the electromagnetic valve based on the target PWM control signal.
2. The air suspension-based solenoid valve control method of claim 1, wherein said determining the load condition of the air spring based on the current height and current air pressure information comprises:
constructing a corresponding flow-pressure-height model according to the flow characteristic information of the air spring;
constructing a corresponding flow-pressure-duty ratio model according to the flow characteristic information of the electromagnetic valve;
and calculating the current height and the current air pressure information through a flow-pressure-height model and a flow-pressure-duty ratio model to obtain the load state of the air spring.
3. The air suspension-based solenoid valve control method of claim 1, wherein said deriving target pressure information for said air spring under said load condition from said current altitude and altitude pressure characteristic information comprises:
calculating the current height according to the height pressure characteristic information to obtain current pressure information;
obtaining a corresponding internal pressure set according to the height pressure characteristic information;
and performing linear interpolation on the current pressure information and the internal pressure set to obtain target pressure information of the air spring in the load state.
4. The air suspension-based solenoid valve control method according to claim 1, wherein the generating of the amount of gas to be charged and discharged through the flow characteristic information of the air spring, the target pressure information and the target height comprises:
performing difference calculation on the current height and the target height to obtain a corresponding height change value;
determining the flow required by lifting unit height according to the flow characteristic information of the air spring;
and accumulating and calculating the height change value and the flow required by the lifting unit height through a target circulating calculation strategy and target pressure information to obtain the amount of gas to be charged and discharged.
5. The air suspension-based electromagnetic valve control method according to claim 1, wherein the generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the amount of the gas to be charged and discharged and controlling the electromagnetic valve based on the target PWM control signal comprises:
calculating the gas quantity to be charged and discharged according to the flow characteristic information of the electromagnetic valve to obtain the current charging and discharging air-to-air ratio and the current cycle number;
and generating a target PWM control signal according to the current charging and discharging air-to-air ratio and the current cycle number, and controlling the electromagnetic valve based on the target PWM control signal.
6. The air suspension-based electromagnetic valve control method according to claim 5, wherein the calculating the amount of the gas to be charged and discharged according to the flow characteristic information of the electromagnetic valve to obtain the current charge and discharge air-to-air ratio and the current cycle number comprises:
acquiring a target duty ratio set of the solenoid valve;
calculating the target duty ratio set according to the flow characteristic information of the electromagnetic valve to obtain a corresponding flow set;
comparing the flow in the flow set with the gas amount to be charged and discharged to obtain the corresponding duty ratio number;
and comparing the duty ratio number with preset control time to obtain the current charge-discharge air-to-air ratio and the current cycle number.
7. The air suspension-based solenoid valve control method according to claim 5, wherein the generating a target PWM control signal according to the current charge-discharge air-to-air ratio and the current cycle number and controlling the solenoid valve based on the target PWM control signal comprises:
acquiring the current single cycle number, and obtaining the corresponding cycle length according to the current single cycle number and the current cycle number;
obtaining a corresponding initial period and a corresponding end period according to the current period number;
generating a target PWM control signal according to the current charging and discharging air-to-air ratio, the period length, the initial period and the ending period;
when the target PWM control signal is a target PWM opening signal, controlling the opening of a channel of the electromagnetic valve;
and when the target PWM control signal is a target PWM closing signal, controlling the passage of the electromagnetic valve to be closed.
8. An air suspension-based solenoid valve control apparatus, comprising:
the determining module is used for determining the load state of the air spring according to the current height and the current air pressure information;
the acquisition module is used for acquiring target pressure information of the air spring in the load state according to the current height and height pressure characteristic information;
the generating module is used for generating the gas quantity to be charged and discharged according to the flow characteristic information, the target pressure information and the target height of the air spring;
and the control module is used for generating a target PWM control signal according to the flow characteristic information of the electromagnetic valve and the gas amount to be charged and discharged and controlling the electromagnetic valve based on the target PWM control signal.
9. An air suspension-based solenoid valve control apparatus, comprising: a memory, a processor and an air suspension based solenoid valve control program stored on the memory and executable on the processor, the air suspension based solenoid valve control program configured to implement the air suspension based solenoid valve control method according to any one of claims 1 to 7.
10. A storage medium, characterized in that the storage medium stores thereon an air suspension-based solenoid valve control program, which when executed by a processor implements the air suspension-based solenoid valve control method according to any one of claims 1 to 7.
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| CN114211927B (en) | 2024-01-30 |
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