VCU application testboard applied to teaching and training

Abstract

The invention discloses a VCU application testboard applied to teaching training, which comprises a mounting box, and a VCU controller, a computer and peripheral devices arranged in the mounting box, and is characterized in that the peripheral devices comprise a motor, a PWM fan, a gear lever assembly, a key switch, a mode switch, a brake switch, a hand brake switch, a brake opening button and an accelerator opening button; the installation box is provided with a decoration panel, the computer is arranged on the upper portion of one side of the decoration panel, the VCU controller is arranged on the upper portion of the other side of the decoration panel, a VCU end banana seat is arranged below the VCU controller, and the VCU end banana seat is in circuit connection with the VCU controller; the peripheral devices are sequentially arranged at the lower part of the decoration panel, device end banana seats are correspondingly arranged above the peripheral devices, and the device end banana seats are in circuit connection with the corresponding peripheral devices; the VCU controller and the peripheral device are in circuit connection through banana head connecting wires correspondingly inserted into the VCU end banana seat and the device end banana seat; the computer is connected with the VCU controller so as to obtain control information or send a control command.

Description

Technical Field

[0001] The present invention relates to the field of VCU application testing, and particularly to a VCU application test bench for teaching and training. Background Art

[0002] The Vehicle Control Unit (VCU) is an important control component of a vehicle, and its development is an important task for automotive engineers. Its development bench usually needs to integrate the VCU itself, a test system, a controlled object, etc. to achieve purposes such as overall strategy development, function confirmation, and application calibration. The bench usually requires a high development cost and very strong professional knowledge to understand and use. For the college and teaching training market, there has never been a training bench product on the market that students can easily master and whose price is acceptable.

[0003] Therefore, it is necessary to provide a VCU application test bench for teaching and training to practice the functions and applications of the VCU and assist in improving the practical ability and innovation ability of users. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a VCU application test bench for teaching and training to practice the functions and applications of the VCU and assist in improving the practical ability and innovation ability of users.

[0005] The technical solution adopted by the present invention to solve the above technical problem is to provide a VCU application test bench for teaching and training, which includes an installation box and a VCU controller, a computer, and peripheral devices arranged in the installation box. The peripheral devices include a motor, a PWM fan, a gear lever assembly, a key switch, a mode switch, a brake switch, a handbrake switch, a brake opening button, and an accelerator opening button.

[0006] The installation box is provided with a decorative panel. The computer is arranged at the upper part on one side of the decorative panel, and the VCU controller is arranged at the upper part on the other side of the decorative panel. A VCU terminal banana socket is arranged below the VCU controller, and the VCU terminal banana socket is electrically connected to the VCU controller.

[0007] The peripheral devices are sequentially arranged at the lower part of the decorative panel. Device terminal banana sockets are correspondingly arranged above the peripheral devices, and the device terminal banana sockets are electrically connected to their corresponding peripheral devices. The VCU controller and the peripheral devices are electrically connected through banana head connecting wires correspondingly inserted into the VCU terminal banana socket and the device terminal banana socket.

[0008] The computer is connected to the VCU controller to obtain control information or send control commands.

[0009] Preferably, a communication device is further provided on the decorative panel, and the computer is connected to the VCU controller through the communication device; an indicator light is further provided on the decorative panel, and the indicator light is arranged between the VCU controller and the banana socket at the VCU end; the indicator light is electrically connected to the VCU controller through a cable circuit arranged inside the installation box.

[0010] Preferably, the banana socket at the VCU end is electrically connected to the VCU controller through a cable circuit arranged inside the installation box; the banana socket at the device end is electrically connected to its corresponding peripheral device through a cable circuit arranged inside the installation box.

[0011] Preferably, the PWM fan is connected to a fan relay, and the fan relay is electrically connected to the banana socket at the device end.

[0012] Preferably, a power interface and a power switch are provided on the installation box, a leakage protector and a socket strip are arranged in the installation box, the power interface, the power switch, the leakage protector and the socket strip are electrically connected, and an external power supply is connected to the power interface for power supply; a voltage stabilizer is further arranged in the installation box, and the voltage stabilizer is connected to the socket strip to supply power to the VCU controller and the peripheral devices.

[0013] Preferably, the installation box is arranged at the upper part of the frame body, a table board is arranged in the middle of the frame body, a drawer is arranged below the table board, and lockable universal wheels are arranged at the bottom of the frame body.

[0014] Preferably, the computer is deployed with a host computer program, and the host computer program includes a display module, a setting module, a signal receiving and parsing module, and a signal simulation and sending module; the signal simulation and sending module includes BMS (battery system) simulation, OBC / DCDC (charger / direct current power supply) simulation, body ECU (electronic controller) simulation, chassis ECU simulation, intelligent driving ECU simulation, and cockpit ECU simulation; the display module is used to display the states of the peripheral devices connected to the VCU controller and the state of the VCU controller; the setting module is used to configure communication parameters, vehicle parameters, battery parameters, and motor parameters; the signal simulation and sending module is used to simulate the control signals of the vehicle-mounted controllers connected to the VCU controller and send them to the VCU controller.

[0015] Based on the same concept, the present invention further provides a control method for the above-mentioned VCU application test bench applied to teaching and training, including the following steps:

[0016] Select a test item and a test mode;

[0017] The host computer program guides the test control operation according to the test item and test mode. The test control operation includes the actions of peripheral devices and the action of sending specified messages.

[0018] The VCU controller sends control commands to the host computer program according to the test control operation according to the pre-set control logic. The VCU controller collects information of relevant peripheral devices and feeds it back to the host computer program.

[0019] The host computer program sends analog information to the VCU controller according to the control commands of the VCU controller.

[0020] The host computer program determines whether the execution conditions for the next step of the test control process are met according to the fed-back information of the peripheral devices. If met, the next step is executed. If not met, an operation prompt is issued and operations are performed according to the operation prompt. After the execution conditions for the next step are met, the next step is executed until the test end conditions are met and the test ends.

[0021] Preferably, the test mode includes the bypass mode and the Plant Model mode. In the bypass mode, all signals sent by the signal simulation sending module to the VCU controller come from assignments. In the Plant model mode, the signals sent by some signal simulation sending modules to the VCU controller are replaced by signal values calculated by pre-set logical operation rules.

[0022] Preferably, the test item is the power-on test, the test mode is the Plant model mode, and the control method includes:

[0023] The host computer program determines whether the brake switch and the key switch are turned on. If turned on, the next step is executed. If not turned on, a prompt to step on the brake and turn on the key switch is issued.

[0024] The VCU controller requests the BMS to simulate closing the pre-charge relay.

[0025] The host computer program determines whether the pre-charge relay and the main and auxiliary relays can be closed according to the pre-set logical operation rules. If possible, the BMS simulates that the status signals of the pre-charge relay and the main and auxiliary relays are closed, and the BMS simulates the bus voltage. If not possible, a prompt to check the battery fault and the power status is issued.

[0026] The VCU controller requests the BMS to simulate closing the main positive relay.

[0027] The host computer program determines whether the main positive relay can be closed according to the pre-set logical operation rules. If possible, the BMS simulates that the status signal of the main positive relay is closed and the BMS status is high-voltage preparation completed. If not possible, a prompt to check the battery fault and the power status is issued.

[0028] The VCU controller requests the motor to enter the torque control state and requests the DCDC to enter the working state;

[0029] The host computer program determines whether the motor and DCDC are allowed to enter the working state according to the preset logical operation rules. If so, the BMS simulates the motor torque control state and DCDC working state. If not, it issues a prompt to check the motor fault, DCDC fault or bus voltage value status;

[0030] When the host computer program determines that the conditions for the end of the power-on test are met, the VCU controller enters the ready state and ends the test.

[0031] The present invention has the following beneficial effects compared with the prior art: The VCU application test bench for teaching and training provided by the present invention uses real peripheral devices to connect to the VCU controller to simulate the connection state of the peripheral devices of the VCU controller in actual applications, and can well simulate various working conditions of the VCU controller; The VCU controller is connected to the banana socket at the VCU end, and the peripheral devices are connected to the banana socket at the device end. The banana head connecting wire is inserted into the banana socket at the VCU end and the banana socket at the device end to complete the connection between the VCU controller and the peripheral devices, strengthening the understanding of the electrical principle of the VCU controller; The host computer program is used to simulate and send the control signals of multiple vehicle-mounted controllers connected to the VCU controller. There is no need to actually connect multiple vehicle-mounted controllers, which reduces costs and the control difficulty of test demonstrations; It helps to better understand and master the functions and applications of the vehicle control unit (VCU) of pure electric vehicles, and improves practical ability and innovation ability. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of the VCU application test bench for teaching and training according to an embodiment of the present invention;

[0033] Figure 2 It is an electrical connection diagram of the VCU application test bench for teaching and training according to an embodiment of the present invention;

[0034] Figure 3 It is an architecture diagram of the host computer program of the VCU application test bench for teaching and training according to an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the bypass mode and Plant model mode principles of the control method of the VCU application test bench for teaching and training according to an embodiment of the present invention;

[0036] Figure 5 It is a power-on test flow chart of the control method of the VCU application test bench for teaching and training according to an embodiment of the present invention.

[0037] In the figure:

[0038] 1. Frame; 2. Drawer; 3. Table board; 4. Power interface; 5. Computer; 6. Power strip; 7. Communication device; 8. Decorative panel; 9. VCU controller; 10. Installation box; 11. Power switch; 12. Indicator light; 13-1. Banana socket at VCU end; 13-2. Banana socket at device end; 14. Fan relay; 15. Motor; 16. PWM fan; 17. Gear lever assembly; 18. Universal wheel; 19. Key switch; 20. Voltage stabilizer power supply; 21. Mode switch; 22. Brake switch; 23. Handbrake switch; 24. Brake opening button; 25. Throttle opening button. Detailed implementation manners

[0039] To make the objectives, features and beneficial effects of the present invention more obvious and understandable, the following describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. It can be understood that the following described specific implementation manners are only used to explain the present invention, rather than limiting the present invention. Moreover, the same or similar reference numerals may be used in the drawings to refer to the same or similar components in different embodiments, and the description of the same or similar components in different embodiments and the description of components, features, effects, etc. of the prior art may also be omitted.

[0040] The following further describes the present invention with reference to the accompanying drawings and embodiments.

[0041] Figure 1 It is a structural schematic diagram of a VCU application test bench for teaching and training according to an embodiment of the present invention; Figure 2 It is an electrical connection diagram of a VCU application test bench for teaching and training according to an embodiment of the present invention; Figure 3 It is an upper computer program architecture diagram of a VCU application test bench for teaching and training according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the Plant model mode of the control method of a VCU application test bench for teaching and training according to an embodiment of the present invention;

[0042] Figure 5 It is a power-on test flow chart of the control method of a VCU application test bench for teaching and training according to an embodiment of the present invention.

[0043] Please refer to Figures 1 - 3 , the VCU application test bench for teaching and training according to an embodiment of the present invention includes an installation box 10 and a VCU controller 9, a computer 5 and peripheral devices arranged in the installation box 10. The peripheral devices include a motor 15, a PWM fan 16, a gear lever assembly 17, a key switch 19, a mode switch 21, a brake switch 22, a handbrake switch 23, a brake opening button 24 and a throttle opening button 25; connecting real peripheral devices to the VCU controller 9 to simulate the connection state of the peripheral devices of the VCU controller 9 in actual applications can well simulate various working conditions of the VCU controller 9;

[0044] The installation box 10 is provided with a decorative panel 8. The computer 5 is arranged at the upper part on one side of the decorative panel 8, and the VCU controller 9 is arranged at the upper part on the other side of the decorative panel 8. Below the VCU controller 9, a VCU terminal banana socket 13-1 is provided, and the VCU terminal banana socket 13-1 is electrically connected to the VCU controller 9;

[0045] The peripheral devices are sequentially arranged at the lower part of the decorative panel 8. Above the peripheral devices, a device terminal banana socket 13-2 is correspondingly provided, and the device terminal banana socket 13-2 is electrically connected to its corresponding peripheral device; The VCU controller 9 and the peripheral devices are electrically connected by banana head connecting wires correspondingly inserted into the VCU terminal banana socket 13-1 and the device terminal banana socket 13-2, strengthening the understanding of the electrical principle of the VCU controller 9;

[0046] The computer 5 is connected to the VCU controller 9 to obtain control information or send control commands.

[0047] In some embodiments, a communication device 7 is further provided on the decorative panel 8. The computer 5 is connected to the VCU controller 9 through the communication device 7 to realize the communication between the computer 5 and the VCU controller 9. The communication device 7 includes but is not limited to a CAN communication device, and different devices can be selected according to different communication types, such as CAN, LIN, Ethernet, etc.

[0048] In some embodiments, an indicator light 12 is further provided on the decorative panel 8. The indicator light 12 is arranged between the VCU controller 9 and the VCU terminal banana socket 13-1; The indicator light 12 is electrically connected to the VCU controller 9 through a cable arranged inside the installation box 10.

[0049] In some embodiments, the VCU terminal banana socket 13-1 is electrically connected to the VCU controller 9 through a cable arranged inside the installation box 10; The device terminal banana socket 13-2 is electrically connected to its corresponding peripheral device through a cable arranged inside the installation box 10.

[0050] In some embodiments, the PWM fan 16 is connected to a fan relay 14. The fan relay 14 is electrically connected to the device terminal banana socket 13-2. The fan relay 14 realizes the electrical isolation of the PWM fan 16, which is beneficial to the speed control of the PWM fan 16.

[0051] In some embodiments, a power interface 4 and a power switch 11 are provided on the installation box 10. A leakage protector and a socket strip 6 are arranged in the installation box 10. The power interface 4, the power switch 11, the leakage protector and the socket strip 6 are electrically connected. The socket strip 6 supplies power to the computer 5, and an external power supply is connected to the power interface 4 for power supply; A voltage stabilizer power supply 20 is further arranged in the installation box 10. The voltage stabilizer power supply 20 is connected to the socket strip 6 to supply power to the VCU controller 9 and the peripheral devices.

[0052] In some embodiments, the installation box 10 is arranged on the upper part of the frame body 1. A table board 3 is arranged in the middle of the frame body 1, a drawer 2 is arranged below the table board 3, and lockable universal wheels 18 are arranged at the bottom of the frame body 1; due to the movable design of the frame body 1, after moving to the required position, the bottom wheels can be fixedly locked, greatly increasing the convenience and reliability of use.

[0053] In some embodiments, the computer 5 is deployed with a host computer program, and the host computer program includes a display module, a setting module, a signal receiving and parsing module, and a signal simulation and sending module; the signal simulation and sending module includes BMS (battery system) simulation, OBC / DCDC (charger / direct current power supply) simulation, body ECU (electronic controller) simulation, chassis ECU simulation, intelligent driving ECU simulation, and cockpit ECU simulation; the display module is used to display the states of the peripheral devices connected to the VCU controller 9 and the state of the VCU controller; the setting module is used to configure parameters, configure communication device parameters, configure vehicle dynamics model parameters, and set key parameters of the battery, motor, and DCDC; the signal receiving and parsing module performs communication parsing on all signals sent by the VCU controller 9 to the host computer program and converts them into visible single signal values; the signal simulation and sending module is used to simulate the control signals of in-vehicle controllers that the VCU controller 9 can connect to and send them to the VCU controller 9.

[0054] The present invention also provides a control method for the VCU application test bench applied to teaching and training as described above, including the following steps:

[0055] Select a test item and a test mode;

[0056] According to the test item and the test mode, the host computer program guides the test control operation, and the test control operation includes the actions of peripheral devices and the action of sending specified messages;

[0057] According to the test control operation, the VCU controller 9 sends control commands to the host computer program according to the pre-set control logic; the VCU controller 9 collects information of relevant peripheral devices and feeds it back to the host computer program;

[0058] The host computer program sends simulation information to the VCU controller 9 according to the control commands of the VCU controller 9;

[0059] The host computer program determines whether the execution conditions for the next step of the test control process are met according to the fed-back information of the peripheral devices. If they are met, the next step is executed. If not, an operation prompt is issued, and operations are performed according to the operation prompt. After the execution conditions for the next step are met, the next step is executed until the test end conditions are met, and the test ends.

[0060] Specifically, the test items include, but are not limited to, power-on test, power-off test, charging test, communication test, gear shifting test, torque output test, energy recovery test, speed limit test, fault response test, etc.

[0061] Please refer to Figure 4 , in some embodiments, the test modes include bypass mode and Plant model mode (boot mode); in bypass mode, all signals sent by the signal simulation sending module to the VCU controller 9 are from assignment; in Plant model mode, the signals sent by some signal simulation sending modules to the VCU controller 9 are replaced by signal values calculated by pre-set logical operation rules.

[0062] Specifically, the signal simulation sending module can assign values to the communication signals of all ECUs interacting with the VCU controller 9 through the simulation sending interface; the signal simulation sending module realizes the assignment of each signal in each frame of the message sent to the VCU controller 9, and for the signals without assignment, default values are used for sending; the signal simulation sending module can import all the default values of the signals in the message at one time through an external excel; it can also import the signal values of some or all signals at different time sequences through an external excel to achieve automated testing.

[0063] Please refer to Figure 5 , in some embodiments, the test item is the power-on test, the test mode is the Plant model mode, and the working process of the Plant model mode is illustrated through this test. The control method specifically includes:

[0064] The host computer program determines whether the brake switch 22 and the key switch 19 are turned on. If they are turned on, the next step is executed; if not, a prompt to step on the brake and turn on the key switch 19 is issued.

[0065] The VCU controller 9 requests the BMS to simulate closing the pre-charge relay.

[0066] The host computer program determines whether the pre-charge relay and the main and auxiliary relays can be closed according to the pre-set logical operation rules. If so, the BMS simulates that the status signals of the pre-charge relay and the main and auxiliary relays are closed, and the BMS simulates the bus voltage. If not, a prompt to check the battery fault and the power status is issued.

[0067] The VCU controller 9 requests the BMS to simulate closing the main positive relay.

[0068] The host computer program determines whether the main positive relay can be closed according to the pre-set logical operation rules. If so, the BMS simulates that the status signal of the main positive relay is closed and the BMS status is high-voltage ready. If not, a prompt to check the battery fault and the power status is issued.

[0069] The VCU controller 9 requests the motor to enter the torque control state and requests the DCDC to enter the working state;

[0070] The host computer program determines whether the motor and the DCDC are allowed to enter the working state according to the pre-set logical operation rules. If so, the BMS simulates the motor torque control state and the DCDC working state. If not, it issues a prompt to check the motor fault, DCDC fault or the state of the bus voltage value;

[0071] When the host computer program determines that the conditions for the end of the power-on test are met, the VCU controller 9 enters the ready state and ends the test.

[0072] Specifically, the test item is the power-on test, the test mode is the bypass mode, and the control method includes:

[0073] The host computer program determines whether the brake switch and the key switch are turned on. If they are turned on, the next step is executed. If not, it issues a prompt to step on the brake and turn on the key switch;

[0074] The VCU controller requests the BMS to simulate closing the pre-charge relay;

[0075] The host computer program prompts the user to simulate the pre-charge relay and the main and auxiliary relays to enter the closed state, simulate the BMS bus voltage signal, simulate the BMS power signal, and simulate that the battery fault is no fault;

[0076] The VCU controller requests the BMS to simulate closing the main positive relay;

[0077] The host computer program prompts the user to simulate that the state signal of the BMS main positive relay is closed, the BMS state is high-voltage ready, simulate the BMS power state, and simulate that the battery fault is no fault;

[0078] The VCU controller requests the motor to enter the torque control state and requests the DCDC to enter the working state;

[0079] The host computer program prompts the user to simulate the motor and the DCDC to enter the working state, and both the motor and the DCDC have no faults;

[0080] When the host computer program determines that the conditions for the end of the power-on test are met, the VCU controller 9 enters the ready state and ends the test.

[0081] In the Plant model mode, all test processes are determined and promoted by the Plant model; in the bypass mode, the host computer program prompts the user to operate; during this process, the user is guided to understand the conditions that need to be met for each step of the state change, so as to understand the control logic of the VCU controller 9.

[0082] The VCU application test bench for teaching and training according to the embodiments of the present invention can be applied to the understanding of the components of the vehicle control unit (VCU) of pure electric vehicles; the understanding and training of the control principles of the vehicle control strategies of pure electric vehicles; the training of the VCU control process can be carried out through simulation switches; it helps users better understand and master the working principles and control strategies of the VCU, and improves the practical ability and innovation ability.

[0083] The VCU application test bench for teaching and training according to the embodiments of the present invention realizes function development, strategy development, component testing, hardware-in-the-loop real-time control, etc. of VCU development at a low cost; adopts a visual design, an easy-to-operate interface, realizes control of the hardware-in-the-loop of the control object, and functions such as development of different applications, which well meet the tasks of teaching and training, etc. At the same time, a movable design of the frame is adopted. After moving to the required position, the bottom wheels can be fixed and locked, greatly increasing the convenience and safety reliability of the test bench.

[0084] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the spirit and scope of the present invention, makes some modifications and improvements, and still falls within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

Claims

1. A VCU application test bench for teaching and training, characterized in that: It includes an installation box and a VCU controller, a computer and peripheral devices arranged in the installation box, wherein the peripheral devices include a motor, a PWM fan, a gear lever assembly, a key switch, a mode switch, a brake switch, a handbrake switch, a brake opening button and a throttle opening button; The installation box is provided with a decorative panel, the computer is arranged on the upper part of one side of the decorative panel, the VCU controller is arranged on the upper part of the other side of the decorative panel, a VCU end banana socket is arranged below the VCU controller, and the VCU end banana socket is connected to the VCU controller circuit; The peripheral devices are arranged in sequence at the lower part of the decorative panel, and a device end banana socket is correspondingly arranged above the peripheral devices, and the device end banana socket is connected to the peripheral device circuit corresponding to it; the VCU controller and the peripheral devices are connected to the circuit by a banana head connecting wire correspondingly inserted into the VCU end banana socket and the device end banana socket; The computer is connected to the VCU controller to obtain control information or send control commands.

2. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The decorative panel is also provided with a communication device, and the computer is connected to the VCU controller via the communication device; the decorative panel is also provided with an indicator light, and the indicator light is arranged between the VCU controller and the banana socket at the VCU end; the indicator light is connected to the VCU controller via a cable circuit arranged inside the installation box.

3. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The VCU-end banana socket is connected to the VCU controller via a cable circuit disposed inside the installation box; the device-end banana socket is connected to the corresponding peripheral device via a cable circuit disposed inside the installation box.

4. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The PWM fan is connected to a fan relay, and the fan relay is connected to the device end banana socket circuit.

5. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The installation box is provided with a power interface and a power switch, and the installation box is provided with a leakage protector and a socket strip. The power interface, the power switch, the leakage protector and the socket strip are circuit-connected, and the external power supply is connected to the power interface for power supply; the installation box is also provided with a voltage-stabilized power supply, and the voltage-stabilized power supply is connected to the socket strip to power the VCU controller and the peripheral devices.

6. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The installation box is arranged on the upper part of the frame, a table top is arranged in the middle part of the frame, a drawer is arranged below the table top, and a lockable universal wheel is arranged at the bottom of the frame.

7. The VCU application test platform for teaching and training as claimed in claim 1, characterized in that: The computer is deployed with a host computer program, which includes a display module, a setting module, a signal receiving and parsing module and a signal simulation sending module; the signal simulation sending module includes BMS (battery system) simulation, OBC / DCDC (charger / DC power supply) simulation, body ECU (electronic controller) simulation, chassis ECU simulation, intelligent driving ECU simulation and cockpit ECU simulation; the display module is used to display the status of peripheral devices connected to the VCU controller and the status of the VCU controller; the setting module is used to configure communication parameters, vehicle parameters, battery parameters and motor parameters; the signal simulation sending module is used to simulate the control signal of the vehicle controller connected to the VCU controller and send it to the VCU controller.

8. A control method for a VCU application test bench for teaching and training as claimed in any one of claims 1 to 7, characterized in that: The steps include: Select test items and test modes; The host computer program guides the test control operation according to the test items and test modes. The test control operation includes the action of peripheral devices and the action of sending designated messages. The VCU controller sends control commands to the host computer program according to the pre-set control logic according to the test control operation; the VCU controller collects information of related peripheral devices and feeds it back to the host computer program; The host computer program sends the simulation information to the VCU controller according to the control command of the VCU controller; The upper computer program determines whether the execution conditions of the next step of the test control process are met based on the information of the feedback peripheral devices. If so, the next step is executed. If not, an operation prompt is issued and the operation is performed according to the operation prompt. After the execution conditions of the next step are met, the next step is executed until the test end conditions are met and the test ends.

9. The control method of the VCU application test bench for teaching and training as claimed in claim 8, characterized in that: The test mode includes a bypass mode and a Plant Model mode; in the bypass mode, all signals sent by the signal simulation sending module to the VCU controller are from the assignment; in the Plant Model mode, some signals sent by the signal simulation sending module to the VCU controller are replaced by signal values ​​calculated by preset logical operation rules.

10. The control method of the VCU application test bench for teaching and training as claimed in claim 9, characterized in that: The test item is a power-on test, the test mode is a Plant Model mode, and the control method includes: The upper computer program determines whether the brake switch and the key switch are turned on. If they are turned on, the next step is executed. If they are not turned on, a prompt to step on the brake and turn on the key switch is issued; The VCU controller requests the BMS to simulate closing the pre-charge relay; The host computer program determines whether the pre-charge relay and the main and auxiliary relays can be closed according to the preset logic operation rules. If so, the BMS simulates the state signal of the pre-charge relay and the main and auxiliary relays as closed, and the BMS simulates the bus voltage. If not, it issues a prompt to check the battery fault and power status; The VCU controller requests the BMS to simulate closing the main positive relay; The host computer program determines whether the main positive relay can be closed according to the preset logic operation rules. If it can be closed, the BMS simulates the state signal of the main positive relay as closed and the BMS state is high voltage preparation completed. If it cannot be closed, a prompt is issued to check the battery fault and power status. The VCU controller requests the motor to enter the torque control state and requests the DCDC to enter the working state; The host computer program determines whether the motor and DCDC are allowed to enter the working state according to the preset logic operation rules. If yes, the BMS simulates the motor torque control state and DCDC working state. If not, it issues a prompt to check the motor fault, DCDC fault or bus voltage value state. The host computer program determines that the power-on test end conditions are met, the VCU controller enters the ready state, and the test ends.

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