CN117590832A - Data transmission method, device, equipment and storage medium - Google Patents

Data transmission method, device, equipment and storage medium Download PDF

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Publication number
CN117590832A
CN117590832A CN202311576150.2A CN202311576150A CN117590832A CN 117590832 A CN117590832 A CN 117590832A CN 202311576150 A CN202311576150 A CN 202311576150A CN 117590832 A CN117590832 A CN 117590832A
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China
Prior art keywords
test data
transmission
clutch
area network
hardware
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CN202311576150.2A
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Inventor
刘治文
陈国栋
李岩
杨云波
张学锋
苏海龙
隋宇航
王小峰
吕有志
狐晓斌
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FAW Group Corp
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FAW Group Corp
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Priority to CN202311576150.2A priority Critical patent/CN117590832A/en
Publication of CN117590832A publication Critical patent/CN117590832A/en
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00Testing or monitoring of control systems or parts thereof
    • G05B23/02Electric testing or monitoring
    • G05B23/0205Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0208Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
    • G05B23/0213Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention discloses a data transmission method, a data transmission device, data transmission equipment and a storage medium. The method comprises the following steps: when a driving virtual calibration test is carried out on a target vehicle in a whole vehicle driving virtual calibration system based on hardware in a ring simulation platform, determining whether a signal transmitted by a controller local area network bus of the driving virtual calibration system contains test data generated in a test process; determining a target transmission mode of the test data based on a determination result of whether the test data is contained in the signal transmitted by the controller area network bus; and transmitting the test data to an automatic transmission physical model of which the hardware runs in a ring simulation platform based on a target transmission mode to obtain the simulation clutch pressure. The invention can effectively solve the problem of distortion of transmission of electromagnetic valve current signals of the automatic transmission in the whole vehicle drivability virtual calibration system based on the hardware-in-loop simulation platform, ensure the accuracy of the simulation clutch pressure and further ensure the drivability virtual calibration effect of the target vehicle.

Description

Data transmission method, device, equipment and storage medium
Technical Field
The invention relates to the technical field of whole vehicle virtual calibration, in particular to a data transmission method, a device, equipment and a storage medium.
Background
With the continuous development of vehicle technology, the requirements of users on vehicle performance are also increasing. Among the vehicle performances, the drivability of the whole vehicle is the vehicle performance most susceptible to the user, and directly determines the purchase intention of the user. For a vehicle equipped with an automatic transmission, the accuracy of clutch pressure control has a decisive influence on the drivability of the whole vehicle, and the accuracy of clutch pressure control depends on the control accuracy of solenoid valve current in the automatic transmission. However, as the configuration of the power system of the current vehicle is continuously enriched, the control strategy is more and more complex, the number of parameters in the electric control system of the vehicle is also rapidly increased, and each vehicle enterprise is a preemptive market share, and the vehicle performance is continuously improved, so that the iterative update of products is accelerated. The drivability calibration of the traditional mode is carried out based on real vehicles and real scenes, is easily influenced and restricted by factors such as sample vehicle supply time, trial production quality, test sites, environmental climate and the like, and cannot meet the rapid development requirement.
In recent years, with the development of digital twin technology, a whole vehicle virtual calibration technology based on a Hardware-in-the-Loop (HiL) simulation platform has become an effective technical means for coping with the above dilemma for each vehicle enterprise. The virtual calibration technology is utilized to realize forward movement and parallel development of the whole vehicle drivability calibration work, improve the calibration efficiency and quality, reduce the calibration development cost, easily realize limit working condition verification and ensure the repeatability and consistency of the test. However, when the hardware is connected with the real automatic transmission electromagnetic valve in the ring simulation platform, the clutch pressure is obtained by collecting the electromagnetic valve current and sending the electromagnetic valve current into the automatic transmission physical model, so that the electromagnetic valve current signal can be distorted in the transmission process of the HiL simulation platform due to operations such as conversion, packaging, encoding and decoding or the like, or the factors such as hardware, software and algorithm, so that the electromagnetic valve current signal fed into the automatic transmission physical model operated in the HiL is out of accuracy, and finally the clutch pressure in the automatic transmission physical model is controlled inaccurately, so that the electromagnetic valve current signal cannot be used for the virtual calibration development of the drivability of the whole vehicle.
Disclosure of Invention
The invention provides a data transmission method, a device, equipment and a storage medium, which are used for effectively solving the problem of transmission distortion of electromagnetic valve current signals in a virtual calibration system, well ensuring the accuracy of clutch pressure control in an automatic transmission physical model and being used for virtual calibration development of the drivability of the whole vehicle.
According to an aspect of the present invention, there is provided a data transmission method, the method comprising:
determining whether a signal transmitted by a controller local area network bus of a target vehicle drivability virtual calibration system contains test data generated in a test process or not when a drivability virtual calibration test is carried out on the target vehicle in a whole vehicle drivability virtual calibration system based on hardware in a ring simulation platform, wherein the test data comprises a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in the target vehicle drivability virtual calibration system;
determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus, wherein the target transmission mode comprises controller area network bus transmission or automatic test software transmission;
And based on the target transmission mode, the test data is sent to an automatic transmission physical model of the hardware running in a ring simulation platform to obtain a simulation clutch pressure so as to develop the drivability virtual calibration of the target vehicle based on the simulation clutch pressure.
According to another aspect of the present invention, there is provided a data transmission apparatus comprising:
the test data determining module is used for determining whether a signal transmitted by a controller area network bus of the target vehicle drivability virtual calibration system contains test data generated in a test process or not when a drivability virtual calibration test is carried out on the target vehicle in the whole vehicle drivability virtual calibration system based on the hardware in the ring simulation platform, wherein the test data comprises a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in the target vehicle drivability virtual calibration system;
the transmission mode determining module is used for determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus, wherein the target transmission mode comprises controller area network bus transmission or automatic test software transmission;
And the data transmission module is used for transmitting the test data to an automatic transmission physical model operated by the hardware in the ring simulation platform based on the target transmission mode to obtain the simulation clutch pressure so as to develop the virtual driving calibration of the target vehicle based on the simulation clutch pressure.
According to another aspect of the present invention, there is provided an electronic device including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the data transmission method of any one of the embodiments of the present invention.
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 data transmission method according to any one of the embodiments of the present invention.
According to the technical scheme, when a driving virtual calibration test is carried out on a target vehicle in a whole vehicle driving virtual calibration system based on a hardware-based ring simulation platform, whether test data generated in a test process are contained in signals transmitted by a controller local area network bus of the target vehicle driving virtual calibration system or not is determined, wherein the test data comprise clutch pressure electromagnetic valve command current signals and/or clutch command pressure signals in the target vehicle driving virtual calibration system; determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus, wherein the target transmission mode comprises the controller area network bus transmission or automatic test software transmission; based on the target transmission mode, the test data is sent to an automatic transmission physical model of which the hardware runs in a ring simulation platform to obtain the simulation clutch pressure, so that the drivability virtual calibration of the target vehicle is carried out based on the simulation clutch pressure. The invention can effectively solve the problem of distortion of transmission of electromagnetic valve current signals of the automatic transmission in the whole vehicle drivability virtual calibration system based on the hardware-in-loop simulation platform, ensure the accuracy of the simulation clutch pressure and further ensure the drivability virtual calibration effect of the target vehicle.
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 flowchart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a flowchart of another data transmission method according to an embodiment of the present invention;
FIG. 3 is a block diagram of a specific automatic transmission physical model provided in accordance with an embodiment of the present invention;
FIG. 4 is a block diagram of another specific automatic transmission physical model provided in accordance with an embodiment of the present invention;
fig. 5 is a flowchart of a specific data transmission method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a specific controller area network bus transmission scheme according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a specific automatic test software transmission mode according to an embodiment of the present invention;
fig. 8 is a block diagram of a data transmission apparatus according to an embodiment of the present invention;
fig. 9 is a block diagram of an electronic device according to an 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 invention without making any inventive effort, shall fall within the scope of the invention.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention and in the foregoing figures, 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 or inherent to such process, method, system, article, or apparatus.
Fig. 1 is a flowchart of a data transmission method according to an embodiment of the present invention, where the embodiment is applicable to a scenario of performing data transmission in a whole vehicle drivability virtual calibration system of a ring simulation platform based on hardware, and the scenario may be executed by a data transmission device, where the data transmission device may be implemented in a form of hardware and/or software and configured in the whole vehicle drivability virtual calibration system, and may also be configured in an electronic device, as shown in fig. 1, and the data transmission method includes the following steps:
s110, determining whether a signal transmitted by a controller local area network bus of the target vehicle drivability virtual calibration system contains test data generated in a test process or not when the drivability virtual calibration system of the whole vehicle based on the hardware in the ring simulation platform carries out drivability virtual calibration test on the target vehicle.
The test data comprise clutch pressure electromagnetic valve command current signals and/or clutch command pressure signals in the target vehicle drivability virtual calibration system, and the actual automatic transmission control unit which is hung on the hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system is sent to a controller area network (Controller Area Network, CAN) bus. Specifically, when a driving virtual calibration test is performed on a target vehicle in a whole vehicle driving virtual calibration system based on a hardware-based ring simulation platform, an automatic transmission control unit may send test data generated in the virtual calibration test process to a CAN bus, and the CAN bus organizes the test data into a preset message format according to a protocol of the CAN bus. It will be appreciated that the automatic transmission control unit may not send test data generated during the virtual calibration test to the CAN bus, and whether the automatic transmission control unit sends the test data of the present invention to the CAN bus depends on the requirements of each control unit in the target vehicle for the test data and the load capacity of the CAN bus communication.
The performance of the vehicle includes performance such as power performance, economy, drivability, steering stability, fuel economy, and comfort, wherein drivability is used to describe dynamic performance of the vehicle. Of the 6 degrees of freedom of movement of the vehicle body (movement along the three axes of the X-axis, the Y-axis and the Z-axis and rotation about the three axes), mainly longitudinal movement (movement along the X-axis) is associated with drivability, that is, straight running, mainly involving the behavior of the vehicle driveline. By way of example, drivability may be vehicle creep, launch, shift, power output during acceleration or deceleration, smoothness of transmission, and the like. The driving feeling index related to drivability includes shift duration (shift duration), shock (shock), front kick (jerk), and the like.
The hardware-in-loop simulation platform is a simulation system in which an actual control unit is directly arranged in a simulation loop, so that a virtual simulation model in the simulation platform and the actual control unit are operated in a combined mode, simulation work is carried out, and the function or performance of the actual control unit is checked. For example, in performing a drivability virtual calibration test on a target vehicle, the target vehicle is subjected to the drivability virtual calibration test on an in-loop simulation platform based on hardware including a real automatic transmission control unit (Transmission Control Unit, TCU) and automatic transmission solenoid valves. The method not only can effectively improve the confidence coefficient of test data, but also can greatly reduce the workload of model construction, ensure the real-time performance of virtual simulation model operation, realize real-time data interaction between the virtual simulation model and an actual TCU, ensure that the verification process of a simulation result is more visual, shorten the calibration development period of a product, improve the calibration development efficiency and quality, reduce the calibration development cost, easily realize limit working condition verification and ensure the repeatability and consistency of the test.
Optionally, determining whether the signal transmitted by the CAN bus of the target vehicle drivability virtual calibration system includes test data generated in the test process includes: the method comprises the steps of acquiring a CAN message on a CAN bus, analyzing the message based on a CAN protocol, and determining whether a signal transmitted by the CAN bus contains a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in a virtual calibration system of the drivability of the target vehicle.
Specifically, for the drivability virtual calibration test of the target vehicle, in the drivability virtual calibration system of the target vehicle, a closed-loop operation is formed between the TCU and a virtual simulation model built in advance, and data interaction is performed between the TCU and the virtual simulation model. As described above, the TCU may or may not send test data generated during the virtual calibration test to the CAN bus, and whether the test data is sent to the CAN bus by the TCU depends on the requirements of each control unit in the target vehicle for the test data and the load capacity of the CAN bus communication, so it is necessary to determine whether the signal transmitted by the CAN bus of the target vehicle driving virtual calibration system includes the test data generated during the driving virtual calibration test.
S120, determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus.
The target transmission mode comprises controller area network bus transmission or automatic test software transmission. Specifically, the controller area network bus transmission mode realizes the transmission of test data to the automatic transmission physical model based on a CAN bus simulation board card and a CAN residual bus model in the target vehicle drivability virtual calibration system; the automatic test software transmission mode is based on signal interaction between calibration test software and automatic test software in the target vehicle drivability virtual calibration system to realize transmission of test data to an automatic transmission physical model.
It can be understood that, because the controller area network bus transmission mode does not need to additionally configure a protocol interface, a workflow and a script program in the automatic test software, the workload is smaller than that of the automatic test software transmission mode, and therefore, the target transmission mode of test data is determined with the aim of minimizing the workload on the premise of ensuring the clutch pressure precision in the automatic transmission physical model.
Specifically, if the signal transmitted by the CAN bus of the target vehicle drivability virtual calibration system already contains test data generated in the test process, determining that the target transmission mode of the test data is controller area network bus transmission, and transmitting the test data based on a CAN bus simulation board card and a CAN residual bus model in the target vehicle drivability virtual calibration system; if the signal transmitted by the CAN bus of the virtual calibration system for drivability of the target vehicle does not contain test data generated in the test process, determining that the target transmission mode of the test data is automatic test software transmission.
In a specific embodiment, determining, based on a determination result of whether the test data is included in the signal transmitted by the controller area network bus, a target transmission mode of the test data includes: when the signal transmitted by the controller area network bus of the target vehicle drivability virtual calibration system contains test data, determining that the target transmission mode is controller area network bus transmission; and when the signal transmitted by the controller local area network bus of the virtual calibration system of the drivability of the target vehicle does not contain test data, determining that the target transmission mode is automatic test software transmission.
Specifically, if the test data contains at least one of a clutch pressure electromagnetic valve command current signal and a clutch command pressure signal in the virtual calibration system of the drivability of the target vehicle, determining that the target transmission mode is controller local area network bus transmission; if the test data does not contain the clutch pressure electromagnetic valve command current signal and the clutch command pressure signal in the target vehicle drivability virtual calibration system, determining that the target transmission mode is automatic test software transmission, and acquiring test data generated by the target vehicle in the drivability virtual calibration test process from an actual TCU (traffic control unit) hung in the target vehicle drivability virtual calibration system based on signal interaction between the calibration test software and the automatic test software.
And S130, based on a target transmission mode, transmitting test data to an automatic transmission physical model of which hardware runs in a ring simulation platform to obtain a simulation clutch pressure so as to develop virtual driving calibration of a target vehicle based on the simulation clutch pressure.
Wherein the automatic transmission is used for changing the rotating speed and the torque from the engine, and different transmission ratios between the input shaft and the output shaft can be realized. The automatic transmission physical model is a simulation model established for the automatic transmission of the target vehicle. Further, the automatic transmission physical model corresponding to the automatic transmission of the target vehicle may be any one of a hydraulic automatic transmission physical model, a mechanical continuously variable transmission physical model, an electric control mechanical automatic transmission physical model, and a double clutch automatic transmission physical model, based on the type of the automatic transmission. For example, an automatic transmission physical model may be built based on a hydrodynamic automatic transmission, wherein the hydrodynamic automatic transmission is composed of a hydrodynamic torque converter, a shift clutch and brake, a planetary gear mechanism and a hydraulic system, and the automatic transmission physical model includes a hydrodynamic torque converter model, a shift clutch and brake model, a planetary gear model and a hydraulic system model.
In this embodiment, the automatic transmission physical model includes a current-pressure conversion model and a hydraulic system model, and the current-pressure conversion model includes a pre-created correspondence relationship between a clutch pressure solenoid valve command current and a clutch command pressure.
Specifically, a clutch pressure electromagnetic valve command current signal in test data is transmitted to an automatic transmission physical model operated in a ring simulation platform by hardware based on a target transmission mode, the clutch command pressure corresponding to the clutch pressure electromagnetic valve command current is determined and obtained according to the corresponding relation between the clutch pressure electromagnetic valve command current and the clutch command pressure which are pre-established in a current pressure conversion model in the automatic transmission physical model, and in the automatic transmission physical model, the clutch command pressure is further input into a hydraulic system model to obtain simulation clutch pressure.
In a specific embodiment, the target transmission mode is an automatic test software transmission, and based on the target transmission mode, test data is sent to an automatic transmission physical model operated by the hardware in a ring simulation platform to obtain a simulation clutch pressure, including: based on automatic test software, acquiring a clutch pressure electromagnetic valve command current signal which is hung in an automatic transmission control unit of a hardware-in-the-loop simulation platform in a target vehicle drivability virtual calibration system; and inputting a clutch pressure electromagnetic valve command current signal into an automatic transmission physical model of which hardware runs in a ring simulation platform to obtain the simulation clutch pressure.
It CAN be understood that when the signal transmitted by the CAN bus of the target vehicle drivability virtual calibration system does not include test data, the command current signal of the clutch pressure solenoid valve needs to be acquired from the real TCU hooked in the target vehicle drivability virtual calibration system, and the process is implemented based on signal interaction between calibration test software and automatic test software: the clutch pressure electromagnetic valve command current signal in the TCU can be directly acquired through connection of the calibration test software and the real TCU, the automatic test software can acquire the clutch pressure electromagnetic valve command current signal based on signal interaction between the calibration test software and the automatic test software, and then the automatic test software inputs the clutch pressure electromagnetic valve command current signal into an automatic transmission physical model of which hardware operates in the ring simulation platform through a data transmission protocol of the automatic test software, so that the simulation clutch pressure is obtained.
Specifically, a command current signal of a clutch pressure electromagnetic valve is obtained from a real TCU hung in a virtual calibration system of the drivability of a target vehicle; the clutch pressure solenoid valve command current signal is input into an automatic transmission physical model operated in a hard simulation platform, a current pressure conversion model in the automatic transmission physical model obtains clutch command pressure corresponding to the clutch pressure solenoid valve command current signal based on the input clutch pressure solenoid valve command current signal and the corresponding relation between the clutch pressure solenoid valve current signal and the clutch command pressure which are created in advance, and in the automatic transmission physical model, the clutch command pressure is further input into a hydraulic system model to obtain simulated clutch pressure.
It should be noted that, for the target vehicle, the difference between the command current value and the actual current value of the clutch pressure solenoid valve is very small, so when the accurate actual current signal of the clutch pressure solenoid valve cannot be obtained, the command current signal of the clutch pressure solenoid valve can be used as the input of the current-pressure conversion model to obtain the clutch command pressure, and then the command current signal is input into the hydraulic system model to obtain the simulated clutch pressure.
According to the technical scheme of the embodiment, according to the configuration conditions of the clutch pressure electromagnetic valve command current signal and the clutch command pressure signal on the CAN bus, the mode that the clutch pressure electromagnetic valve command current signal and the clutch command pressure signal are input into the automatic transmission physical model is flexibly selected, and on the premise of guaranteeing the clutch pressure control precision in the automatic transmission physical model, the workload CAN be minimized, and the automatic transmission physical model has good flexibility and applicability.
Fig. 2 is a flowchart of another data transmission method according to an embodiment of the present invention, where the present embodiment is applicable to a scenario of performing data transmission in a whole vehicle drivability virtual calibration system of a ring simulation platform based on hardware, and the present embodiment and the data transmission method in the foregoing embodiment belong to the same inventive concept, and on the basis of the foregoing embodiment, a process of transmitting test data to an automatic transmission physical model running in the ring simulation platform based on a target transmission manner to obtain a simulated clutch pressure so as to perform drivability virtual calibration of a target vehicle based on the simulated clutch pressure is further described.
As shown in fig. 2, the data transmission method includes:
s210, determining whether a signal transmitted by a controller local area network bus of the target vehicle drivability virtual calibration system contains test data generated in a test process or not when the drivability virtual calibration system of the whole vehicle based on the hardware in the ring simulation platform carries out drivability virtual calibration test on the target vehicle.
And S220, when the signal transmitted by the controller area network bus contains test data, determining that the target transmission mode of the test data is the controller area network bus transmission mode.
S230, based on a controller local area network bus transmission mode, inputting test data into an automatic transmission physical model operated in a ring simulation platform by hardware to obtain a simulation clutch pressure so as to develop drivability virtual calibration of a target vehicle based on the simulation clutch pressure.
The test data are sent to the controller local area network bus through an actual automatic transmission control unit which is hung on a hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system.
The automatic transmission physical model includes a current-pressure conversion model and a hydraulic system model. The automatic transmission physical model is built based on the actual structure and physical principle of the automatic transmission, and comprises not only a current-pressure conversion model and a hydraulic system model, but also a clutch model, a gear speed change mechanism model and other functional modules, but the invention does not relate to the improvement of other functional modules.
Referring to fig. 3, a current-pressure conversion model is established based on a correspondence (Current to Pressure, C2P) between the actual current of the clutch pressure solenoid valve and the clutch command pressure, which may be simply referred to as a C2P model; the C2P model takes actual current of the clutch pressure electromagnetic valve as input, and determines clutch command pressure corresponding to the actual current of the clutch pressure electromagnetic valve through a corresponding relation between the actual current of the clutch pressure electromagnetic valve and the clutch command pressure, which is created in advance. The hydraulic system model takes clutch command pressure as input, and outputs simulated clutch pressure corresponding to the clutch command pressure by simulating the motion condition and pressure response condition of automatic transmission oil in a real hydraulic system.
In addition, for the target vehicle, the difference between the command current value and the actual current value of the clutch pressure solenoid valve is very small, so when the accurate actual current of the clutch pressure solenoid valve cannot be obtained, the command current of the clutch pressure solenoid valve can be used as the input of the C2P model to calculate the clutch command pressure.
Specifically, the clutch pressure solenoid valve command current is taken as an input, and the clutch command pressure corresponding to the clutch pressure solenoid valve command current is determined through a pre-established correspondence between the clutch pressure solenoid valve actual current and the clutch command pressure.
In this embodiment, the automatic transmission physical model includes a current-pressure conversion model and a hydraulic system model, and based on a target transmission manner, test data is sent to the automatic transmission physical model in which hardware operates in a ring simulation platform, to obtain a simulated clutch pressure, including: when the test data contains a clutch pressure solenoid valve command current signal, the clutch pressure solenoid valve command current signal is input into a current pressure conversion model of hardware running in a ring simulation platform to obtain clutch command pressure corresponding to the test data, and in an automatic transmission physical model, the clutch command pressure is further input into the hydraulic system model to obtain simulated clutch pressure corresponding to the clutch command pressure, so that the automatic transmission physical model is not required to be changed.
In this embodiment, when the test data includes the clutch command pressure signal and does not include the clutch pressure solenoid valve command current signal, the transmitting the test data to the automatic transmission physical model in which the hardware operates in the ring simulation platform based on the target transmission mode, to obtain the simulated clutch pressure includes: and cutting off a clutch command pressure signal output to a hydraulic system model by a current pressure conversion model in the automatic transmission physical model, and inputting the clutch command pressure signal to the hydraulic system model of which the hardware operates in a ring simulation platform to obtain a simulation clutch pressure corresponding to the clutch command pressure.
Specifically, when the test data only includes a clutch command pressure signal in the virtual calibration system of the drivability of the target vehicle, the original physical model of the automatic transmission needs to be changed, the clutch command pressure signal output from the current-pressure conversion model to the hydraulic system model in the original physical model of the automatic transmission is cut off, and the clutch command pressure signal in the virtual calibration system of the drivability of the target vehicle is determined to be transmitted to the hydraulic system model operated in the ring simulation platform by adopting a controller local area network bus transmission mode so as to output the simulation clutch pressure corresponding to the clutch command pressure. The method has the advantages that compared with an automatic test software transmission mode, the workload of adopting a controller area network bus transmission mode is much less, and the workload can be minimized on the premise of ensuring the clutch pressure precision in an automatic transmission physical model.
Further, referring to fig. 4, the test data only includes a clutch command pressure signal in the virtual calibration system for drivability of the target vehicle, and based on the target transmission mode, the test data is sent to an automatic transmission physical model in which hardware operates in a ring simulation platform, to obtain a simulated clutch pressure, including: and cutting off clutch command pressure transmission between the current pressure conversion model and the hydraulic system model in the original automatic transmission physical model, and inputting a clutch command pressure signal transmitted based on a controller local area network bus to the hydraulic system model to obtain simulated clutch pressure.
In a specific embodiment, the hardware-in-loop simulation platform includes a controller area network bus simulation board card and operates with a controller area network residual bus model, the target transmission mode is controller area network bus transmission, and based on the target transmission mode, test data is sent to an automatic transmission physical model operated in the hardware-in-loop simulation platform to obtain a simulated clutch pressure, including: the method comprises the steps that through an automatic transmission control unit which is hung on a hardware-in-the-loop simulation platform in a target vehicle drivability virtual calibration system, test data are sent to a controller local area network bus simulation board card in the hardware-in-the-loop simulation platform through an actual signal transmission harness; based on the controller local area network bus simulation board card, test data are directly sent to a controller local area network residual bus model, and the test data output by the controller local area network residual bus model are used as input data of an automatic transmission physical model; the input data is input to the automatic transmission physical model to obtain the simulated clutch pressure.
It CAN be understood that, since only the actual TCU is hooked in the target vehicle drivability virtual calibration system and no other control units in the target vehicle are hooked, if the TCU and the virtual object model are to form closed-loop operation in the target vehicle drivability virtual calibration system, the virtual object model needs to include a virtual control unit model corresponding to other control units except the TCU in the target vehicle, and signal interaction is realized between the virtual object model and the TCU through the CAN bus simulation board card and the CAN residual bus model. The CAN residual bus model is a CAN model for simulating CAN signal transceiving of all virtual control units except for an actual TCU which is hung in a whole-vehicle virtual calibration system of a target vehicle, for example, only the actual TCU is hung in the whole-vehicle virtual calibration system, and the CAN residual bus model simulates CAN signal transceiving of virtual control units such as a vehicle body electronic stability system control unit, a battery management control unit, a motor control unit and the like which are not hung with the actual control units.
The CAN bus simulation board card and the real TCU which is hung in the target vehicle drivability virtual calibration system CAN be subjected to signal transmission through an actual signal transmission wire harness. The CAN bus simulation board card may be a real printed circuit board based on a CAN communication protocol, and the actual signal transmission harness is used for connecting a CAN signal Pin (Pin) of the real TCU with an electrical channel corresponding to the CAN bus simulation board card in the hardware-in-loop simulation platform to perform CAN signal transmission, for example, the actual signal transmission harness may be a copper wire covered with an insulating rubber.
Specifically, a real TCU hung in a virtual calibration system for drivability of a target vehicle sends test data to a CAN bus simulation board card in a hardware-in-loop simulation platform through the real wire harness; the CAN bus simulation board card directly sends the test data to a CAN residual bus model, and the test data output by the CAN residual bus model is used as input data of an automatic transmission physical model; the input data is input to an automatic transmission physical model to obtain a simulated clutch pressure.
According to the technical scheme, the clutch pressure electromagnetic valve command current signal or the clutch command pressure signal is input into the automatic transmission physical model of which hardware operates in the ring simulation platform in a controller local area network bus transmission or automatic test software transmission mode, a hardware transmission line of the automatic transmission electromagnetic valve current signal in the target vehicle drivability virtual calibration system is not required to be redesigned, changed or adjusted, the accuracy of clutch pressure control in the automatic transmission physical model can be well ensured, and the situation of distortion of electromagnetic valve current signal transmission in the virtual calibration system is effectively solved.
Fig. 5 is a flowchart of a specific data transmission method according to an embodiment of the present invention, and as shown in fig. 5, the data transmission method includes:
s510, determining whether a signal transmitted by the CAN bus contains a clutch pressure electromagnetic valve command current signal generated in the test process or not when a driving virtual calibration test is carried out on a real TCU of a target vehicle in a whole vehicle driving virtual calibration system based on a hardware in-loop simulation platform.
Specifically, when a real TCU of a target vehicle is subjected to a virtual calibration test of drivability (such as creep, start and gear shift quality) in a virtual calibration system of the drivability of the whole vehicle based on hardware in a ring simulation platform, if it is determined that a signal transmitted by a CAN bus includes a clutch pressure electromagnetic valve command current signal generated in a test process, S520 is executed; if it is determined that the signal transmitted by the CAN bus does not include the clutch pressure solenoid valve command current signal generated during the test, S540 is executed.
S520, determining to input a clutch pressure electromagnetic valve command current signal into an automatic transmission physical model by adopting a controller local area network bus transmission mode.
S530, based on a controller local area network bus transmission mode, a clutch pressure electromagnetic valve command current signal is sent to an automatic transmission physical model of which hardware runs in a ring simulation platform, so that a simulation clutch pressure is obtained, and driving virtual calibration of a target vehicle is carried out based on the simulation clutch pressure.
In a specific embodiment, if the test data contains a clutch pressure solenoid command current signal and/or a clutch command pressure signal in the virtual calibration system for drivability of the target vehicle, determining that the target transmission mode is controller area network bus transmission, determining that the clutch pressure solenoid command current signal is input into the automatic transmission physical model through the controller area network bus transmission mode when the test data contains the clutch pressure solenoid command current signal, and determining that the clutch command pressure signal is input into the automatic transmission physical model through the controller area network bus transmission mode when the test data does not contain the clutch pressure solenoid command current signal but contains the clutch command pressure signal; if the test data does not contain the clutch pressure electromagnetic valve command current signal and the clutch command pressure signal in the target vehicle drivability virtual calibration system, determining that the target transmission mode is automatic test software transmission, and for calibrating the whole vehicle drivability such as creeping, starting and gear shifting quality, the clutch pressure electromagnetic valve command current signal and/or the clutch command pressure signal are generally configured in the TCU, and under the condition, determining that the clutch pressure electromagnetic valve command current signal is input into an automatic transmission physical model through the automatic test software transmission mode. The method is characterized in that compared with an automatic test software transmission mode, the controller local area network bus transmission mode does not need to additionally configure protocol interfaces, workflows, script programs and the like, and the workload is much less; under the same transmission mode, compared with a clutch command pressure signal, the clutch pressure electromagnetic valve command current signal is transmitted to the automatic transmission physical model without changing the original automatic transmission physical model, and when the clutch command pressure signal is transmitted to the automatic transmission physical model, the clutch command pressure signal which is output to the hydraulic system model by the current pressure conversion model in the original automatic transmission physical model is cut off, so that the original automatic transmission physical model is changed, and the workload is more. Therefore, the method for determining the target transmission mode can minimize the workload on the premise of ensuring the clutch pressure precision in the automatic transmission physical model.
Referring to fig. 6, first, a real TCU hooked in a virtual calibration system for drivability of a target vehicle sends a clutch pressure solenoid valve command current signal to a CAN bus simulation board card of a hardware-in-the-loop simulation platform through a hard wire connection. The hard wire connection means that a CAN signal Pin (Pin) of a real TCU hung in a target vehicle drivability virtual calibration system is connected with an electric channel corresponding to a CAN bus simulation board card in the ring simulation platform through an actual signal transmission wire harness, so that signal transmission is realized, and the signal transmission wire harness CAN be a copper wire covered with an insulating rubber.
Secondly, the CAN bus simulation board card in the hardware-in-loop simulation platform directly sends a clutch pressure electromagnetic valve command current signal to a CAN residual bus model operated in a Real-time processing unit (Real-Time Processing Cell, RTPC) of the hardware-in-loop simulation platform. The CAN residual bus model is a CAN model for simulating CAN signal receiving and transmitting of all virtual control units except for an actual TCU which is hung in a whole-vehicle virtual calibration system of a target vehicle, for example, only the actual TCU is hung in the whole-vehicle virtual calibration system, and then the CAN residual bus model simulates and simulates the CAN signal receiving and transmitting of the virtual control units such as a vehicle body electronic stability system control unit, a battery management control unit, a motor control unit and the like which are not hung with the actual control units. The virtual control unit is characterized by each virtual control unit model in the whole vehicle virtual object model.
And finally, the CAN residual bus model transmits a clutch pressure electromagnetic valve command current signal to an automatic transmission physical model of which the hardware operates in the ring simulation platform through a signal transmission interface to obtain a simulation clutch pressure so as to develop the drivability virtual calibration of the target vehicle based on the simulation clutch pressure. The virtual calibration system of the whole vehicle of the target vehicle is built based on an XXX brand HiL simulation platform, an input interface which is adapted to an XXX brand CAN residual bus model is arranged in the Simulink and used for signal transmission, and signal interaction between the CAN residual bus model in the HiL simulation platform and an automatic transmission physical model is achieved through upper computer software of the HiL simulation platform. The method has the advantages that the controller area network bus transmission mode is adopted to send the TCU which is hung in the virtual calibration of the drivability of the target vehicle to the clutch pressure electromagnetic valve command current signal on the CAN bus to the automatic transmission physical model which operates in the HiL simulation platform, and the workload CAN be minimized on the premise of ensuring the clutch pressure precision in the automatic transmission physical model.
S540, determining whether a signal transmitted by the CAN bus contains a clutch command pressure signal generated in the test process.
Because the test data transmission based on the controller area network bus transmission mode is much less than the data transmission based on the automatic test software transmission mode, if it is determined that the signal transmitted by the CAN bus contains the clutch command pressure signal generated during the test, S550 is executed; if it is determined that the signal transmitted from the CAN bus does not include the clutch command pressure signal generated during the test, S560 is performed.
S550, determining that a controller local area network bus transmission mode is adopted to input a clutch command pressure signal into an automatic transmission physical model, changing the original automatic transmission physical model, cutting off the clutch command pressure signal which is output to a hydraulic system model by a current pressure conversion model in the original automatic transmission physical model, inputting the clutch command pressure signal into the hydraulic system model which is operated in a ring simulation platform by hardware based on the controller local area network bus transmission mode, and obtaining a simulation clutch pressure so as to develop the drivability virtual calibration of the target vehicle based on the simulation clutch pressure.
S560, determining to input a clutch pressure electromagnetic valve command current signal into an automatic transmission physical model by adopting an automatic test software transmission mode.
Specifically, an automatic test software transmission mode is adopted, the configuration of a protocol interface is required according to the calibration test software matched with the automatic test software, for example, when CANape is adopted as the calibration test software, the ASAP3 communication protocol of the automatic test software is required to be configured, and the automatic test software can adopt eACME or AVL CAMEO and the like. In addition, the automatic test software transmission mode is adopted, and workflow, script program and the like of the automatic test software are also required to be configured.
S570, acquiring a clutch pressure electromagnetic valve command current signal in a TCU (thyristor control unit) hung in a virtual calibration system of the drivability of the target vehicle based on signal interaction between calibration test software and automatic test software, inputting the clutch pressure electromagnetic valve command current signal into an automatic transmission physical model of which hardware operates in a ring simulation platform, and obtaining simulated clutch pressure so as to develop virtual calibration of the drivability of the target vehicle based on the simulated clutch pressure.
Referring to fig. 7, first, since the calibration test software is connected with the real TCU hooked in the virtual calibration system for drivability of the target vehicle, the signal in the real TCU hooked in the virtual calibration system for drivability of the target vehicle can be directly measured by the calibration test software, as described above, for performing calibration of drivability of the vehicle such as creep, start and shift quality, the clutch pressure solenoid command current signal and the clutch command pressure signal are generally configured in the signal in the TCU, so, based on the signal interaction between the calibration test software and the automatic test software, the clutch pressure solenoid command current signal in the TCU can be obtained by the automatic test software and directly input into the automatic transmission physical model running in the HiL simulation platform based on the data transmission protocol, and, for example, the automatic test software inputs the clutch pressure solenoid command current signal into the automatic transmission operating in the pc of the HiL simulation platform through its data transmission protocol, such as XiL data transmission protocol of eACME, after the clutch pressure solenoid command current signal in the real TCU hooked in the virtual calibration system for drivability of the target vehicle is obtained, so as to obtain the clutch pressure command current signal for drivability of the target vehicle based on the virtual calibration model.
The technical scheme of the embodiment includes that firstly, configuration conditions of a clutch pressure electromagnetic valve command current signal and a clutch command pressure signal in signals transmitted by a CAN bus are determined; then, determining a mode that the clutch pressure electromagnetic valve command current signal or the clutch command pressure signal is input into a physical model of the automatic transmission according to the configuration situation of the clutch pressure electromagnetic valve command current signal and the clutch command pressure signal in signals transmitted by the CAN bus; finally, according to the signal input into the physical model of the automatic transmission, the physical model of the automatic transmission is adjusted and modified, specifically, if the clutch pressure electromagnetic valve command current signal is input into the physical model of the automatic transmission, the original physical model of the automatic transmission is not required to be changed, if the clutch command pressure signal is input into the physical model of the automatic transmission, the clutch command pressure output from the current pressure conversion model to the hydraulic system model in the original physical model of the automatic transmission is cut off, and instead, the clutch command pressure signal in the test data is input into the hydraulic system model of the hardware running in the ring simulation platform, so as to obtain the simulated clutch pressure, and the virtual calibration of the drivability of the target vehicle is carried out based on the simulated clutch pressure.
Fig. 8 is a block diagram of a data transmission device according to an embodiment of the present invention, where the embodiment is applicable to a scenario of data transmission in a whole vehicle drivability virtual calibration system based on a hardware-based ring simulation platform, and the device may be implemented in a form of hardware and/or software and integrated in the whole vehicle drivability virtual calibration system.
As shown in fig. 8, the data transmission apparatus includes:
the test data determining module 801 is configured to determine, when a driving virtual calibration test is performed on a target vehicle in a whole vehicle driving virtual calibration system based on hardware in a ring simulation platform, whether a signal transmitted by a controller area network bus of the driving virtual calibration system of the target vehicle contains test data generated in a test process, where the test data includes a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in the driving virtual calibration system of the target vehicle; a transmission mode determining module 802, configured to determine a target transmission mode of the test data based on a determination result of whether the signal transmitted by the controller area network bus includes the test data, where the target transmission mode includes controller area network bus transmission or automatic test software transmission; and the data transmission module 803 is configured to send the test data to an automatic transmission physical model running in the ring simulation platform by the hardware based on the target transmission mode, so as to obtain a simulated clutch pressure, so as to develop a virtual driving calibration of the target vehicle based on the simulated clutch pressure. The invention can effectively solve the problem of distortion of transmission of electromagnetic valve current signals of the automatic transmission in the whole vehicle drivability virtual calibration system based on the hardware-in-loop simulation platform, ensure the accuracy of the simulation clutch pressure and further ensure the drivability virtual calibration effect of the target vehicle.
Optionally, the transmission mode determining module 802 is configured to:
when the test data is contained in the signal transmitted by the controller area network bus of the target vehicle drivability virtual calibration system, determining that the target transmission mode is controller area network bus transmission;
and when the test data is not contained in the signals transmitted by the controller local area network bus of the target vehicle drivability virtual calibration system, determining that the target transmission mode is automatic test software transmission.
Optionally, the data transmission module 803 includes a simulated clutch pressure determination unit for:
inputting the test data into an automatic transmission physical model of the hardware running in a ring simulation platform based on a controller local area network bus transmission mode to obtain simulation clutch pressure;
the test data are transmitted to a controller local area network bus through an actual automatic transmission control unit which is hung on a hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system.
Optionally, the simulated clutch pressure determining unit is further configured to:
when the test data comprise the clutch pressure electromagnetic valve command current signal, the clutch pressure electromagnetic valve command current signal is input into a current pressure conversion model of the hardware running in a ring simulation platform to obtain clutch command pressure corresponding to the test data, and in an automatic transmission physical model, the clutch command pressure is further input into the hydraulic system model to obtain simulated clutch pressure corresponding to the clutch command pressure, so that the automatic transmission physical model is not required to be changed.
Optionally, the simulated clutch pressure determining unit is further configured to:
and when the test data contains the clutch command pressure signal and does not contain the clutch pressure electromagnetic valve command current signal, cutting off the clutch command pressure signal which is output to a hydraulic system model by a current pressure conversion model in the automatic transmission physical model, and inputting the clutch command pressure signal in the test data into the hydraulic system model of which the hardware operates in a ring simulation platform to obtain the simulation clutch pressure corresponding to the clutch command pressure.
In this case, the original physical model of the automatic transmission needs to be modified, the clutch command pressure output from the current-pressure conversion model to the hydraulic system model in the original physical model of the automatic transmission is cut off, and instead, the clutch command pressure signal in the test data is input to the hydraulic system model in which the hardware operates in the ring simulation platform.
Optionally, the simulated clutch pressure determining unit is further configured to:
the test data is sent to the controller local area network bus simulation board card in the hardware-in-the-loop simulation platform through an automatic transmission control unit which is hung on the hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system by an actual signal transmission wire harness;
Based on the controller area network bus simulation board card, the test data are directly sent to the controller area network residual bus model, and the test data output by the controller area network residual bus model are used as input data of the automatic transmission physical model;
and inputting the input data into the automatic transmission physical model to obtain the simulation clutch pressure.
Optionally, the simulated clutch pressure determining unit is further configured to:
based on automatic test software, acquiring a command current signal of the clutch pressure electromagnetic valve in the automatic transmission control unit of the hardware-in-the-loop simulation platform, which is hung in the virtual calibration system of the drivability of the target vehicle;
and inputting the clutch pressure electromagnetic valve command current signal into an automatic transmission physical model of the hardware running in the ring simulation platform to obtain the simulation clutch pressure.
The data transmission device provided by the embodiment of the invention can execute the data transmission method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 9 is a block diagram of an electronic device according to an embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components and their connections, relationships, and functions shown therein are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed in this document.
As shown in fig. 9, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor 11, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the Random Access Memory (RAM) 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, read Only Memory (ROM) 12 and Random Access Memory (RAM) 13 are connected to each other by a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information, data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the data transmission method.
In some embodiments, the data transmission method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via Read Only Memory (ROM) 12 and/or communication unit 19. One or more steps of the data transmission method described above may be performed when the computer program is loaded into a Random Access Memory (RAM) 13 and executed by the processor 11. Alternatively, in other embodiments, the processor 11 may be configured to perform the data transmission method in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above can be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data transfer apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
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 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to an electronic device. Other kinds of devices may also be used to provide for interaction with a user, for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), a computing system that includes an intermediate component (e.g., an application server), a computing system that includes a front-end component (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and techniques described here), or any combination of such background, intermediate, or front-end components. The components of the system may 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.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, is a host product in a cloud computing service system, and solves the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service.
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 executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be 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 data transmission method, comprising:
determining whether a signal transmitted by a controller local area network bus of a target vehicle drivability virtual calibration system contains test data generated in a test process or not when a drivability virtual calibration test is carried out on the target vehicle in a whole vehicle drivability virtual calibration system based on hardware in a ring simulation platform, wherein the test data comprises a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in the target vehicle drivability virtual calibration system;
Determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus, wherein the target transmission mode comprises controller area network bus transmission or automatic test software transmission;
and based on the target transmission mode, the test data is sent to an automatic transmission physical model of the hardware running in a ring simulation platform to obtain a simulation clutch pressure so as to develop the drivability virtual calibration of the target vehicle based on the simulation clutch pressure.
2. The method according to claim 1, wherein determining the target transmission mode of the test data based on the determination result of whether the test data is included in the signal transmitted by the controller area network bus includes:
when the test data is contained in the signal transmitted by the controller area network bus of the target vehicle drivability virtual calibration system, determining that the target transmission mode is controller area network bus transmission;
and when the test data is not contained in the signals transmitted by the controller local area network bus of the target vehicle drivability virtual calibration system, determining that the target transmission mode is automatic test software transmission.
3. The method according to claim 1 or 2, wherein the target transmission mode is controller area network bus transmission,
the step of sending the test data to an automatic transmission physical model operated by the hardware in a ring simulation platform based on the target transmission mode to obtain a simulation clutch pressure comprises the following steps:
inputting the test data into an automatic transmission physical model of the hardware running in a ring simulation platform based on a controller local area network bus transmission mode to obtain simulation clutch pressure;
the test data are transmitted to a controller local area network bus through an actual automatic transmission control unit which is hung on a hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system.
4. The method of claim 1 or 3, wherein the automatic transmission physical model comprises a current-pressure conversion model and a hydraulic system model,
the step of sending the test data to an automatic transmission physical model operated by the hardware in a ring simulation platform based on the target transmission mode to obtain a simulation clutch pressure comprises the following steps:
when the test data comprise the clutch pressure electromagnetic valve command current signal, the clutch pressure electromagnetic valve command current signal is input into a current pressure conversion model of the hardware running in a ring simulation platform to obtain clutch command pressure corresponding to the test data, and in an automatic transmission physical model, the clutch command pressure is further input into the hydraulic system model to obtain simulated clutch pressure corresponding to the clutch command pressure, so that the automatic transmission physical model is not required to be changed.
5. The method of any one of claims 1, 3 and 4, wherein when the test data includes the clutch command pressure signal and does not include the clutch pressure solenoid command current signal,
the step of sending the test data to an automatic transmission physical model operated by the hardware in a ring simulation platform based on the target transmission mode to obtain a simulation clutch pressure comprises the following steps:
and cutting off a clutch command pressure signal output to a hydraulic system model by a current pressure conversion model in the automatic transmission physical model, and inputting the clutch command pressure signal to the hydraulic system model of which the hardware operates in a ring simulation platform to obtain a simulation clutch pressure corresponding to the clutch command pressure.
6. The method of claim 1, wherein the hardware-in-the-loop simulation platform comprises a controller area network bus simulation board and is operated with a controller area network residual bus model, the target transmission mode is controller area network bus transmission,
the step of sending the test data to an automatic transmission physical model operated by the hardware in a ring simulation platform based on the target transmission mode to obtain a simulation clutch pressure comprises the following steps:
The test data is sent to the controller local area network bus simulation board card in the hardware-in-the-loop simulation platform through an automatic transmission control unit which is hung on the hardware-in-the-loop simulation platform in the target vehicle drivability virtual calibration system by an actual signal transmission wire harness;
based on the controller area network bus simulation board card, the test data are directly sent to the controller area network residual bus model, and the test data output by the controller area network residual bus model are used as input data of the automatic transmission physical model;
and inputting the input data into the automatic transmission physical model to obtain the simulation clutch pressure.
7. The method according to claim 1 or 2, wherein the target transmission mode is an automatic test software transmission,
the step of sending the test data to an automatic transmission physical model operated by the hardware in a ring simulation platform based on the target transmission mode to obtain a simulation clutch pressure comprises the following steps:
based on automatic test software, acquiring a command current signal of the clutch pressure electromagnetic valve in the automatic transmission control unit of the hardware-in-the-loop simulation platform, which is hung in the virtual calibration system of the drivability of the target vehicle;
And inputting the clutch pressure electromagnetic valve command current signal into an automatic transmission physical model of the hardware running in the ring simulation platform to obtain the simulation clutch pressure.
8. A data transmission apparatus, comprising:
the test data determining module is used for determining whether a signal transmitted by a controller area network bus of the target vehicle drivability virtual calibration system contains test data generated in a test process or not when a drivability virtual calibration test is carried out on the target vehicle in the whole vehicle drivability virtual calibration system based on the hardware in the ring simulation platform, wherein the test data comprises a clutch pressure electromagnetic valve command current signal and/or a clutch command pressure signal in the target vehicle drivability virtual calibration system;
the transmission mode determining module is used for determining a target transmission mode of the test data based on the determination result of whether the test data is contained in the signal transmitted by the controller area network bus, wherein the target transmission mode comprises controller area network bus transmission or automatic test software transmission;
and the data transmission module is used for transmitting the test data to an automatic transmission physical model operated by the hardware in the ring simulation platform based on the target transmission mode to obtain the simulation clutch pressure so as to develop the virtual driving calibration of the target vehicle based on the simulation clutch pressure.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the data transmission method of any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the data transmission method of any one of claims 1-7.
CN202311576150.2A 2023-11-23 2023-11-23 Data transmission method, device, equipment and storage medium Pending CN117590832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311576150.2A CN117590832A (en) 2023-11-23 2023-11-23 Data transmission method, device, equipment and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311576150.2A CN117590832A (en) 2023-11-23 2023-11-23 Data transmission method, device, equipment and storage medium

Publications (1)

Publication Number Publication Date
CN117590832A true CN117590832A (en) 2024-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN117590832A (en)

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