A Test Optimization Method, Device and System for an Automotive Electronic Stability System

Abstract

The present invention discloses a method, device and system for testing and optimizing an automotive electronic stability system. The test optimization device includes a data acquisition unit, a performance evaluation unit and an optimization management unit. The test optimization system includes a test optimization module, a data storage module and a user interaction module. By acquiring the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single lane change test data set and double lane change test data set of the vehicle to be tested, and comprehensively evaluating the rollover prevention performance and direction control performance of the vehicle to be tested according to various test data sets, the comprehensiveness of the test of the automotive electronic stability system is improved.

Description

Technical Field

[0001] The present invention relates to the field of test optimization of automotive electronic stability systems, and relates to a test optimization method, device and system for automotive electronic stability systems. Background Art

[0002] An automotive electronic stability control system is a new type of active safety system for vehicles, which is a further expansion of the functions of an automotive anti-lock braking system (ABS) and a traction control system (TCS). On this basis, a yaw rate sensor, a lateral acceleration sensor and a steering wheel angle sensor are added when the vehicle is steering. The ECU controls the power output of the engine and the braking force of each axle to ensure the lateral stability of the vehicle during driving.

[0003] In the prior art, the electronic stability control system of commercial vehicles is often tested. However, since there is no specific evaluation system for the ESC function performance in the commercial vehicle field, a comprehensive system evaluation of the ESC system cannot be performed, resulting in the defects of the system not being discovered in time, making it difficult to optimize the ESC system efficiently.

[0004] Therefore, there is a need for a test optimization method, device and system for automotive electronic stability systems to solve the problems existing in the prior art. Summary of the Invention

[0005] Aiming at the above existing technical problems, the purpose of the present invention is to provide a test optimization method, device and system for automotive electronic stability systems, so as to improve the comprehensiveness of the test of automotive electronic stability systems.

[0006] The present invention provides a test optimization method for an automotive electronic stability system. The test optimization method includes: obtaining a fixed steering wheel acceleration test data set, a fixed radius acceleration test data set, a J-turn test data set, a single lane change test data set and a double lane change test data set of a to-be-tested vehicle; evaluating the rollover prevention performance of the to-be-tested vehicle according to the fixed steering wheel acceleration test data set, the fixed radius acceleration test data set and the J-turn test data set to obtain a first evaluation result, and evaluating the direction control performance of the to-be-tested vehicle according to the single lane change test data set and the double lane change test data set to obtain a second evaluation result; generating a test optimization plan according to the first evaluation result and the second evaluation result, so that a user can optimize the to-be-tested vehicle according to the test optimization plan.

[0007] In one embodiment, before obtaining the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set, and double lane change test data set of the vehicle to be tested, the test optimization method further includes: when the vehicle to be tested is in an unloaded state and a fully loaded state respectively, performing a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter set, so as to obtain a fixed-steering-wheel acceleration test data set; when the vehicle to be tested is in an unloaded state and a fully loaded state respectively, performing a fixed-radius acceleration test on the vehicle to be tested with a preset second test parameter set, so as to obtain a fixed-radius acceleration test data set; when the vehicle to be tested is in a fully loaded state, performing a J-turn test on the vehicle to be tested with a preset third test parameter set, so as to obtain a J-turn test data set; when the vehicle to be tested is in a fully loaded state, performing a single-lane change test on the vehicle to be tested with a preset fourth test parameter set, so as to obtain a single-lane change test data set; when the vehicle to be tested is in an unloaded state, performing a double lane change test on the vehicle to be tested with a preset fifth test parameter set, so as to obtain a double lane change test data set.

[0008] In one embodiment, performing a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter set, so as to obtain a fixed-steering-wheel acceleration test data set, specifically includes: rotating and fixing the steering wheel of the vehicle to be tested at a preset first angle and in a preset first direction, and making the vehicle to be tested accelerate on a first test road surface along a preset first trajectory, storing the first data of the vehicle to be tested obtained during the driving process into the fixed-steering-wheel acceleration test data set, and when the vehicle speed of the vehicle to be tested reaches a preset first test threshold, completing this test and continuing to repeat this step a preset first number of times; the first data includes vehicle speed, steering angle, lateral acceleration, yaw rate, opening of the accelerator pedal, engine / drive motor torque, engine / drive motor speed, driver's braking request, ESC's control of engine / motor torque, and wheel-end brake chamber air pressure; rotating and fixing the steering wheel of the vehicle to be tested at a preset second angle and in a preset second direction, and making the vehicle to be tested accelerate on the first test road surface along a preset second trajectory, storing the second data of the vehicle to be tested obtained during the driving process into the fixed-steering-wheel acceleration test data set, and when the vehicle speed of the vehicle to be tested reaches a preset second test threshold, completing this test and continuing to repeat this step a preset second number of times.

[0009] In one embodiment, a constant-radius acceleration test is performed on the vehicle under test with a preset second test parameter set, so as to obtain a constant-radius acceleration test data set, which specifically includes: making the vehicle under test accelerate on a second test road surface with a preset third trajectory, third direction, and first radius, storing the third data obtained during the acceleration process into the constant-radius acceleration test data set, and performing the next step when ESC torque limiting and braking are activated; the third data includes vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver braking request, ESC control of engine / motor torque, and wheel-side brake chamber air pressure; making the vehicle under test decelerate on the second test road surface with the third trajectory, third direction, and first radius, storing the fourth data obtained during the deceleration process into the constant-radius acceleration test data set, and performing the next step when the vehicle speed of the vehicle under test decreases to the point where the ESC function exits; rotating the steering wheel of the vehicle under test at a preset first speed and fourth direction, making the vehicle under test travel on the second test road surface with the third direction and second radius, storing the fifth data obtained during the travel into the constant-radius acceleration test data set, and performing the next step when ESC wheel-side braking is activated; the second radius is smaller than the first radius; repeating the above steps until the number of repetitions reaches a preset third number; repeating the above steps in a preset fourth direction and with a preset fourth number of times.

[0010] In one embodiment, a single lane change test is performed on the vehicle under test with a preset fourth test parameter set, so as to obtain a single lane change test data set, which specifically includes: making the vehicle under test accelerate from a high adhesion coefficient road surface to a low adhesion coefficient road surface on a third test road surface at a preset first test vehicle speed and first test acceleration, storing the sixth data obtained during the travel into the single lane change test data set, and stopping the vehicle when a termination signal input by the user is received; the third test road surface includes a high adhesion coefficient road surface and a low adhesion coefficient road surface.

[0011] In one embodiment, a double lane change test is performed on the vehicle under test with a preset fifth test parameter set, so as to obtain a double lane change test data set, which specifically includes: making the vehicle under test accelerate on a fourth test road surface at a preset second test vehicle speed and second test acceleration, storing the seventh data obtained during the travel into the single lane change test data set, and stopping the vehicle when the vehicle under test hits the cone barrels three times in a row; the fourth test road surface includes cone barrels arranged in a preset first array.

[0012] The present invention also provides a test optimization device for an automotive electronic stability system. The test optimization device includes a data acquisition unit, a performance evaluation unit, and an optimization management unit. Among them, the data acquisition unit is used to acquire a fixed-steering-wheel acceleration test data set, a fixed-radius acceleration test data set, a J-turn test data set, a single-lane change test data set, and a double-lane change test data set of a to-be-tested vehicle; the performance evaluation unit is used to evaluate the rollover prevention performance of the to-be-tested vehicle according to the fixed-steering-wheel acceleration test data set, the fixed-radius acceleration test data set, and the J-turn test data set to obtain a first evaluation result, and evaluate the direction control performance of the to-be-tested vehicle according to the single-lane change test data set and the double-lane change test data set to obtain a second evaluation result; the optimization management unit is used to generate a test optimization plan according to the first evaluation result and the second evaluation result, so that the user can optimize the to-be-tested vehicle according to the test optimization plan.

[0013] In one embodiment, the test optimization device further includes a function test unit. The function test unit is used to: perform a fixed-steering-wheel acceleration test on the to-be-tested vehicle with a preset first test parameter set when the to-be-tested vehicle is in an unloaded state and a loaded state respectively, so as to obtain a fixed-steering-wheel acceleration test data set; perform a fixed-radius acceleration test on the to-be-tested vehicle with a preset second test parameter set when the to-be-tested vehicle is in an unloaded state and a loaded state respectively, so as to obtain a fixed-radius acceleration test data set; perform a J-turn test on the to-be-tested vehicle with a preset third test parameter set when the to-be-tested vehicle is in a loaded state, so as to obtain a J-turn test data set; perform a single-lane change test on the to-be-tested vehicle with a preset fourth test parameter set when the to-be-tested vehicle is in a loaded state, so as to obtain a single-lane change test data set; perform a double-lane change test on the to-be-tested vehicle with a preset fifth test parameter set when the to-be-tested vehicle is in an unloaded state, so as to obtain a double-lane change test data set.

[0014] The present invention also provides a test optimization system for an automotive electronic stability system. The test optimization system includes a test optimization module, a data storage module, and a user interaction module. The test optimization module is communicatively connected to the data storage module and the user interaction module respectively. The data storage module is used to store all data, and the user interaction module is used to provide hardware support for the interaction between the user and the test optimization module.

[0015] In one embodiment, the user interaction module includes a touchable display screen / non-touchable display screen, an input keyboard, an indicator light, a microphone, or a speaker.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] The present invention provides a method, device and system for testing and optimizing an automotive electronic stability system. By obtaining the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set and double-lane change test data set of the vehicle to be tested, and comprehensively evaluating the anti-roll performance and direction control performance of the vehicle to be tested based on various test data sets, the comprehensiveness of the test of the automotive electronic stability system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings of the specification, where:

[0019] Figure 1 shows a flowchart of an embodiment of a method for testing and optimizing an automotive electronic stability system according to the present invention;

[0020] Figure 2 shows a schematic diagram of an embodiment of the first array of the cone barrels arranged on the fourth test road surface;

[0021] Figure 3 shows a structural diagram of an embodiment of a device for testing and optimizing an automotive electronic stability system according to the present invention;

[0022] Figure 4 shows a structural diagram of an embodiment of a system for testing and optimizing an automotive electronic stability system according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention. Specific Embodiment 1

[0025] The embodiment of the present invention first describes a kind of. Figure 1 shows a flowchart of an embodiment of a method for testing and optimizing an automotive electronic stability system according to the present invention. As Figure 1 shown, the method includes the following steps:

[0026] S1: Obtain the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set and double-lane change test data set of the vehicle to be tested.

[0027] Since the ESC system can only be activated under extreme working conditions, it is very difficult to explore and evaluate whether the function control meets the usage requirements. However, it is very important for practical applications to reflect the ESC performance of commercial vehicles to provide specific indicators for the subsequent optimization of the ESC system. Therefore, in the embodiments of the present invention, the rollover prevention performance of the vehicle under test is evaluated by performing a fixed-steering-wheel acceleration test, a fixed-radius acceleration test, and a J-turn test on the vehicle under test, and the direction control function of the vehicle under test is evaluated by performing a single-lane change test and a double lane change test on the vehicle under test, so as to give an optimization plan according to the evaluation results of the two performances.

[0028] Therefore, when it is necessary to test and optimize the electronic stability system of the vehicle under test, it is first necessary to obtain the fixed-steering-wheel acceleration test data set, the fixed-radius acceleration test data set, the J-turn test data set, the single-lane change test data set, and the double lane change test data set of the vehicle under test to provide data support for the subsequent evaluation and optimization. In the embodiments of the present invention, it is necessary to record the data generated during multiple tests. Among them, the types of data that need to be recorded include: vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver braking request, ESC control of engine / motor torque, and wheel-side brake chamber air pressure during the test.

[0029] S2: According to the fixed-steering-wheel acceleration test data set, the fixed-radius acceleration test data set, and the J-turn test data set, evaluate the rollover prevention performance of the vehicle under test to obtain a first evaluation result, and according to the single-lane change test data set and the double lane change test data set, evaluate the direction control performance of the vehicle under test to obtain a second evaluation result.

[0030] After obtaining multiple test data sets, the rollover prevention performance and the direction control performance of the vehicle under test can be evaluated according to the multiple test data sets respectively.

[0031] In practical applications, the evaluation process of the rollover prevention performance includes: First, obtain the first lateral acceleration and the second lateral acceleration in the fixed-steering-wheel acceleration test data set, and obtain the first evaluation value input by the user. Among them, the first lateral acceleration is the lateral acceleration when the ESC activates the engine / motor torque control, and the second lateral acceleration is the lateral acceleration corresponding to the air pressure of any wheel-side brake reaching 34 kPa. Then, obtain the third lateral acceleration, the third vehicle speed, the fourth lateral acceleration, the fourth vehicle speed, the fifth lateral acceleration, and the fifth vehicle speed in the fixed-radius acceleration test data set, and obtain the second evaluation value input by the user. Among them, the third lateral acceleration and the third vehicle speed are the lateral acceleration and vehicle speed when the ESC activates the engine / motor torque control respectively, the fourth lateral acceleration and the fourth vehicle speed are the lateral acceleration and vehicle speed when the ESC exits the engine / motor torque control respectively, and the fifth lateral acceleration and the fifth vehicle speed are the lateral acceleration and vehicle speed when the ESC activates the wheel-side brake control respectively. Then, obtain the first vehicle speed condition, the second vehicle speed condition, the first torque condition, and the maximum test vehicle speed in the J-turn test data set. Among them, the first vehicle speed condition is the judgment result of whether the vehicle speed exceeds 47 km / h at 3 s after passing the starting position, the second vehicle speed condition is the judgment result of whether the vehicle speed exceeds 45 km / h at 4 s after passing the starting position, the first torque condition is the judgment result of whether the actual torque is at least 10% less than the requested torque and lasts for no less than 0.5 s during the process when the ESC is in effect, and the maximum test vehicle speed is the maximum test vehicle speed that can be stabilized within the lane lines. Finally, evaluate the rollover prevention performance of the electronic stability system based on all the data obtained above, so as to obtain the first evaluation result.

[0032] On the basis of the above rollover prevention performance evaluation, in practical applications, it is also necessary to evaluate the direction control performance, which specifically includes: First, obtain the first completion vehicle speed, the first yaw rate, and the first test lateral acceleration in the single lane change test data set, and obtain the third evaluation value input by the user. Among them, the first completion vehicle speed is the highest vehicle speed at which the vehicle can complete the single lane change test, the first yaw rate is the yaw rate of the vehicle during the single lane change test, and the first test lateral acceleration is the lateral acceleration of the vehicle during the single lane change test. Subsequently, obtain the second completion vehicle speed, the second yaw rate, and the second test lateral acceleration in the double lane change test data set, and obtain the fourth evaluation value input by the user. Among them, the second completion vehicle speed is the highest vehicle speed at which the vehicle can complete the double lane change test, the second yaw rate is the yaw rate of the vehicle during the double lane change test, and the second test lateral acceleration is the lateral acceleration of the vehicle during the double lane change test.

[0033] S3: Generate a test optimization plan according to the first evaluation result and the second evaluation result, so that the user can optimize the to-be-tested vehicle according to the test optimization plan.

[0034] In one embodiment, before obtaining the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set, and double lane change test data set of the vehicle to be tested, the test optimization method further includes: when the vehicle to be tested is in an unloaded state and a fully loaded state respectively, performing a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter set, so as to obtain a fixed-steering-wheel acceleration test data set; when the vehicle to be tested is in an unloaded state and a fully loaded state respectively, performing a fixed-radius acceleration test on the vehicle to be tested with a preset second test parameter set, so as to obtain a fixed-radius acceleration test data set; when the vehicle to be tested is in a fully loaded state, performing a J-turn test on the vehicle to be tested with a preset third test parameter set, so as to obtain a J-turn test data set; when the vehicle to be tested is in a fully loaded state, performing a single-lane change test on the vehicle to be tested with a preset fourth test parameter set, so as to obtain a single-lane change test data set; when the vehicle to be tested is in an unloaded state, performing a double lane change test on the vehicle to be tested with a preset fifth test parameter set, so as to obtain a double lane change test data set.

[0035] In one embodiment, performing a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter set, so as to obtain a fixed-steering-wheel acceleration test data set, specifically includes: rotating and fixing the steering wheel of the vehicle to be tested at a preset first angle and in a preset first direction, and making the vehicle to be tested accelerate on a first test road surface along a preset first trajectory, storing the first data of the vehicle to be tested obtained during the driving process into the fixed-steering-wheel acceleration test data set, and when the vehicle speed of the vehicle to be tested reaches a preset first test threshold, completing this test, and continuing to repeat this step a preset first number of times; rotating and fixing the steering wheel of the vehicle to be tested at a preset second angle and in a preset second direction, and making the vehicle to be tested accelerate on the first test road surface along a preset second trajectory, storing the second data of the vehicle to be tested obtained during the driving process into the fixed-steering-wheel acceleration test data set, and when the vehicle speed of the vehicle to be tested reaches a preset second test threshold, completing this test, and continuing to repeat this step a preset second number of times.

[0036] In one embodiment, the first angle is 135°, the first direction is counterclockwise, the first trajectory is spiral, the first test threshold is 45 KM / H, and the first number of times is 3 times. In one embodiment, the second angle is 135°, the second direction is clockwise, the second trajectory is spiral, the second test threshold is 45 KM / H, and the second number of times is 3 times.

[0037] In this embodiment, the first data includes vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver's braking request, ESC's engine / motor torque control, and wheel-end brake chamber air pressure.

[0038] In one embodiment, a constant-radius acceleration test is performed on the vehicle under test with a preset second test parameter set to obtain a constant-radius acceleration test data set, which specifically includes: accelerating the vehicle under test on a second test road surface along a preset third trajectory, in a third direction, and with a first radius, storing the third data obtained during the accelerating process into the constant-radius acceleration test data set, and performing the next step when ESC torque limitation and braking are activated; decelerating the vehicle under test on the second test road surface along the third trajectory, in the third direction, and with the first radius, storing the fourth data obtained during the decelerating process into the constant-radius acceleration test data set, and performing the next step when the vehicle speed of the vehicle under test decreases to the point where the ESC function exits; rotating the steering wheel of the vehicle under test at a preset first rotational speed and in a fourth direction, and driving the vehicle under test on the second test road surface in the third direction and with a second radius, storing the fifth data obtained during the driving process into the constant-radius acceleration test data set, and performing the next step when ESC wheel-end braking is activated; the second radius is smaller than the first radius; repeating the above steps until the number of repetitions reaches a preset third number; repeating the above steps in a preset fourth direction and with a preset fourth number.

[0039] In one embodiment, the second test road surface is a circular square, the first radius is greater than 150 m, the third trajectory is circular, the third direction is counterclockwise, and the first rotational speed is 0.15 rad / s - 0.4 rad / s. In one embodiment, the fourth direction is counterclockwise, the third number is 3 times, and the fourth number is 3 times.

[0040] In this embodiment, the third data includes vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver's braking request, ESC's engine / motor torque control, and wheel-end brake chamber air pressure.

[0041] In one embodiment, the J-turn test is performed on the vehicle to be tested with a preset third test parameter group, so as to obtain a J-turn test data group, which specifically includes: passing through the starting point of the J-turn fixed circle lane at the fourth vehicle speed and in the counterclockwise direction, and observing whether the ESC (torque limit + braking) is activated; subsequently, on the basis of the fourth vehicle speed, increasing by 1-2 km / h each time, so as to determine the critical vehicle speed V2 (wheel side air pressure is greater than 34 Kpa) at which the ESC is activated, passing through the starting position at the critical vehicle speed V2 and in the counterclockwise direction, and then accelerating through the starting position (always keeping the vehicle driving trajectory within the J-turn fixed circle lane during the process), and recording the test data; then, on the basis of the critical vehicle speed V2, increasing by 2 kM / h each time, passing through the starting position in the counterclockwise direction (always keeping the vehicle driving trajectory within the J-turn fixed circle lane during the process), and recording the test data each time; until the vehicle deviates from the J-turn fixed circle lane or passes through the starting position at a speed of at least 1.3 times the critical vehicle speed, stop the test after recording the data.

[0042] In one embodiment, the single-lane change test is performed on the vehicle to be tested with a preset fourth test parameter group, so as to obtain a single-lane change test data group, which specifically includes: making the vehicle to be tested accelerate from a high adhesion coefficient road surface to a low adhesion coefficient road surface on the third test road surface at a preset first test vehicle speed and a first test acceleration, storing the sixth data obtained during the driving process into the single-lane change test data group, and stopping driving when a termination signal input by the user is received.

[0043] In one embodiment, the third test road surface includes a high adhesion coefficient road surface and a low adhesion coefficient road surface, and the vehicle to be tested needs to accelerate to a specified vehicle speed on the high adhesion coefficient road surface before entering the low adhesion coefficient road surface. In one embodiment, the first test vehicle speed is 30 KM / H and the first test acceleration is 2 KM / H.

[0044] In one embodiment, the double lane change test is performed on the vehicle to be tested with a preset fifth test parameter group, so as to obtain a double lane change test data group, which specifically includes: making the vehicle to be tested accelerate on the fourth test road surface at a preset second test vehicle speed and a second test acceleration, storing the seventh data obtained during the driving process into the single-lane change test data group, and stopping driving when the vehicle to be tested touches the cone barrels three times in a row; the fourth test road surface includes cone barrels arranged in a preset first array.

[0045] In one embodiment, the fourth test road surface is a 10*150 m dry, flat and solid runway, the slope of the fourth test road surface is not greater than 1%, and the peak braking force coefficient of the fourth test road surface is not less than 0.8. In one embodiment, the second test vehicle speed is 50 Km / h and the second test acceleration is 2 Km / h. For further illustration of the arrangement of the cone barrels, please refer to Figure 2, Figure 2 A schematic diagram showing an embodiment of the first array of cone barrels arranged on the fourth test road surface.

[0046] An embodiment of the present invention describes a test optimization method for an automotive electronic stability system. By obtaining the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set, and double-lane change test data set of the vehicle to be tested, and comprehensively evaluating the rollover prevention performance and direction control performance of the vehicle to be tested based on various test data sets, this test optimization method improves the comprehensiveness of the test for the automotive electronic stability system. Specific Embodiment Two

[0048] In addition to the above method, an embodiment of the present invention also describes a test optimization device for an automotive electronic stability system. Figure 3 A structural diagram showing an embodiment of a test optimization device for an automotive electronic stability system according to the present invention.

[0049] As shown in the figure, the test optimization device includes a data acquisition unit 11, a performance evaluation unit 12, and an optimization management unit 13.

[0050] Among them, the data acquisition unit 11 is used to obtain the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set, and double-lane change test data set of the vehicle to be tested.

[0051] The performance evaluation unit 12 is used to evaluate the rollover prevention performance of the vehicle to be tested based on the fixed-steering-wheel acceleration test data set, the fixed-radius acceleration test data set, and the J-turn test data set to obtain a first evaluation result, and evaluate the direction control performance of the vehicle to be tested based on the single-lane change test data set and the double-lane change test data set to obtain a second evaluation result.

[0052] The optimization management unit 13 is used to generate a test optimization plan based on the first evaluation result and the second evaluation result, so that the user can optimize the vehicle to be tested according to the test optimization plan.

[0053] In one embodiment, the test optimization device further includes a functional test unit, which is configured to: when the vehicle under test is in an unloaded state and a fully loaded state respectively, perform a fixed-steering-wheel acceleration test on the vehicle under test with a preset first test parameter set, so as to obtain a fixed-steering-wheel acceleration test data set; when the vehicle under test is in an unloaded state and a fully loaded state respectively, perform a fixed-radius acceleration test on the vehicle under test with a preset second test parameter set, so as to obtain a fixed-radius acceleration test data set; when the vehicle under test is in a fully loaded state, perform a J-turn test on the vehicle under test with a preset third test parameter set, so as to obtain a J-turn test data set; when the vehicle under test is in a fully loaded state, perform a single lane change test on the vehicle under test with a preset fourth test parameter set, so as to obtain a single lane change test data set; when the vehicle under test is in an unloaded state, perform a double lane change test on the vehicle under test with a preset fifth test parameter set, so as to obtain a double lane change test data set.

[0054] The embodiment of the present invention describes a test optimization device for an automotive electronic stability system. By obtaining a fixed-steering-wheel acceleration test data set, a fixed-radius acceleration test data set, a J-turn test data set, a single lane change test data set, and a double lane change test data set of the vehicle under test, and comprehensively evaluating the rollover prevention performance and direction control performance of the vehicle under test according to multiple test data sets, the test optimization device improves the comprehensiveness of the test for the automotive electronic stability system. Specific Embodiment III

[0056] In addition to the above methods and devices, the present invention also describes a test optimization system for an automotive electronic stability system. Figure 4 The structural diagram of an embodiment of a test optimization system for an automotive electronic stability system according to the present invention is shown.

[0057] As shown in the figure, the test optimization system includes a test optimization module 1, a data storage module 2, and a user interaction module 3. The test optimization module 1 is communicatively connected to the data storage module 2 and the user interaction module 3 respectively. The data storage module 2 is used to store all data, and the user interaction module 3 is used to provide hardware support for the interaction between the user and the test optimization module 1.

[0058] In one embodiment, the user interaction module 3 includes a touch screen / non-touch screen, an input keyboard, an indicator light, a microphone, or a speaker.

[0059] An embodiment of the present invention describes a test optimization system for an automotive electronic stability system. By obtaining the fixed-steering-wheel acceleration test data set, fixed-radius acceleration test data set, J-turn test data set, single-lane change test data set, and double-lane change test data set of the vehicle to be tested, and comprehensively evaluating the rollover prevention performance and direction control performance of the vehicle to be tested based on various test data sets, the test optimization system improves the comprehensiveness of the test for the automotive electronic stability system.

[0060] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test optimization method for an automotive electronic stability system, characterized in that, The described test optimization method includes: When the vehicle to be tested is in an unloaded state and a fully loaded state respectively, perform a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter group, so as to obtain a fixed-steering-wheel acceleration test data group; When the vehicle to be tested is in an unloaded state and a fully loaded state respectively, perform a fixed-radius acceleration test on the vehicle to be tested with a preset second test parameter group, so as to obtain a fixed-radius acceleration test data group; When the vehicle to be tested is in a fully loaded state, perform a J-turn test on the vehicle to be tested with a preset third test parameter group, so as to obtain a J-turn test data group, which specifically includes: passing through the starting point of the J-turn fixed-circle lane at a fourth vehicle speed and in a counterclockwise direction, and observing whether the ESC is activated; subsequently, on the basis of the fourth vehicle speed, repeat the test with the speed increasing by 1 - 2 km / h each time, so as to determine the critical vehicle speed at which the ESC is activated; After passing through the starting position at the critical vehicle speed and in a counterclockwise direction, continue to accelerate to pass through the starting position again, and record the test data, where the vehicle driving trajectory is always within the J-turn fixed-circle lane; On the basis of the critical vehicle speed, repeat the test with the speed increasing by 2 km / h each time, and repeatedly pass through the starting position in a counterclockwise direction, where the vehicle driving trajectory is always within the J-turn fixed-circle lane; record the test data each time until the vehicle deviates from the J-turn fixed-circle lane or the vehicle passes through the starting position at a speed of at least 1.3 times the critical vehicle speed, and stop the test after recording the data; When the vehicle to be tested is in a fully loaded state, perform a single lane change test on the vehicle to be tested with a preset fourth test parameter group, so as to obtain a single lane change test data group; When the vehicle to be tested is in a fully loaded state, perform a double lane change test on the vehicle to be tested with a preset fifth test parameter group, so as to obtain a double lane change test data group; According to the fixed-steering-wheel acceleration test data group, the fixed-radius acceleration test data group and the J-turn test data group, evaluate the rollover prevention performance of the vehicle to be tested to obtain a first evaluation result, and according to the single lane change test data group and the double lane change test data group, evaluate the direction control performance of the vehicle to be tested to obtain a second evaluation result; Generate a test optimization plan according to the first evaluation result and the second evaluation result, so that the user can optimize the vehicle to be tested according to the test optimization plan.

2. The test optimization method for an automotive electronic stability system according to claim 1, wherein Perform a fixed-steering-wheel acceleration test on the vehicle to be tested with a preset first test parameter group, so as to obtain a fixed-steering-wheel acceleration test data group, which specifically includes: Rotate and fix the steering wheel of the vehicle under test at a preset first angle and in a preset first direction, and accelerate the vehicle under test on a first test road surface along a preset first trajectory. Store the first data of the vehicle under test obtained during the driving process into the fixed-steering-wheel acceleration test data group. When the vehicle speed of the vehicle under test reaches a preset first test threshold, complete this test, and continue to repeat this step a preset first number of times; the first data includes vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver braking request, ESC control of engine / motor torque, wheel-end brake chamber air pressure. Rotate and fix the steering wheel of the vehicle under test at a preset second angle and in a preset second direction, and accelerate the vehicle under test on the first test road surface along a preset second trajectory. Store the second data of the vehicle under test obtained during the driving process into the fixed-steering-wheel acceleration test data group. When the vehicle speed of the vehicle under test reaches a preset second test threshold, complete this test, and continue to repeat this step a preset second number of times.

3. The test optimization method for an automotive electronic stability system according to claim 1, characterized in that Conduct a constant-radius acceleration test on the vehicle under test with a preset second test parameter group to obtain a constant-radius acceleration test data group, specifically including: Accelerate the vehicle under test on a second test road surface along a preset third trajectory, in a third direction, and with a first radius. Store the third data obtained during the acceleration process into the constant-radius acceleration test data group, and when ESC torque limit and braking are activated, perform the next step; the third data includes vehicle speed, steering angle, lateral acceleration, yaw rate, accelerator pedal opening, engine / drive motor torque, engine / drive motor speed, driver braking request, ESC control of engine / motor torque, wheel-end brake chamber air pressure. Decelerate the vehicle under test on the second test road surface along the third trajectory, in the third direction, and with the first radius. Store the fourth data obtained during the deceleration process into the constant-radius acceleration test data group, and when the vehicle speed of the vehicle under test drops to the point where the ESC function exits, perform the next step. Rotate the steering wheel of the vehicle under test at a preset first speed and in a fourth direction, and drive the vehicle under test on the second test road surface in the third direction and with a second radius. Store the fifth data obtained during the driving process into the constant-radius acceleration test data group, and when ESC wheel-end braking is activated, perform the next step; the second radius is smaller than the first radius. Repeat the above steps until the number of repetitions reaches a preset third number. Repeat the above steps in a preset fourth direction and a preset fourth number of times.

4. The test optimization method for an automotive electronic stability system according to claim 1, characterized in that, Conduct a single lane change test on the vehicle under test with a preset fourth test parameter group to obtain a single lane change test data group, specifically including: Accelerate the vehicle under test from a high - adhesion - coefficient road surface to a low - adhesion - coefficient road surface on the third test road surface at a preset first test vehicle speed and first test acceleration, store the sixth data obtained during the driving process into the single - lane - change test data group, and stop driving when a termination signal input by the user is received; the third test road surface includes a high - adhesion - coefficient road surface and a low - adhesion - coefficient road surface.

5. The test optimization method for an automotive electronic stability system according to claim 4, characterized in that Conduct a double - lane - change test on the vehicle under test with a preset fifth test parameter group to obtain a double - lane - change test data group, specifically including: Accelerate the vehicle under test on the fourth test road surface at a preset second test vehicle speed and second test acceleration, store the seventh data obtained during the driving process into the single - lane - change test data group, and stop driving when the vehicle under test hits the cone barrels three times continuously; the fourth test road surface includes cones arranged in a preset first array. Among them, the fourth test road surface is a 10 * 150m dry, flat and solid runway, the gradient of the fourth test road surface is not more than 1%, and the peak braking coefficient of the fourth test road surface is not less than 0.8; the second test vehicle speed is 50 Km / h, and the second test acceleration is 2 Km / h.

6. A test optimization device for an automotive electronic stability system, characterized in that, The test optimization device includes a function test unit, a data acquisition unit, a performance evaluation unit, and an optimization management unit. Among them, the function test unit is used for: Conduct a fixed - steering - wheel acceleration test on the vehicle under test with a preset first test parameter group when the vehicle under test is in an unloaded state and a loaded state respectively, so as to obtain a fixed - steering - wheel acceleration test data group. Conduct a fixed - radius acceleration test on the vehicle under test with a preset second test parameter group when the vehicle under test is in an unloaded state and a loaded state respectively, so as to obtain a fixed - radius acceleration test data group. Conduct a J - turn test on the vehicle under test with a preset third test parameter group when the vehicle under test is in a loaded state to obtain a J - turn test data group, specifically including: Pass through the starting point of the J - turn fixed - circle lane at the fourth vehicle speed and in the counter - clockwise direction, and observe whether the ESC is activated; Subsequently, on the basis of the fourth vehicle speed, repeat the test with the speed increasing by 1 - 2 km / h each time to determine the critical vehicle speed at which the ESC is activated. After passing through the starting position at the critical vehicle speed and in the counter - clockwise direction, continue to accelerate to pass through the starting position again and record the test data, where the vehicle driving trajectory is always within the J - turn fixed - circle lane. On the basis of the critical vehicle speed, repeat the test with the speed increasing by 2 km / h each time, and repeatedly pass through the starting position in the counter - clockwise direction, where the vehicle driving trajectory is always within the J - turn fixed - circle lane; record the test data each time until the vehicle deviates from the J - turn fixed - circle lane or the vehicle passes through the starting position at a speed of at least 1.3 times the critical vehicle speed, and stop the test after recording the data. Conduct a single - lane - change test on the vehicle under test with a preset fourth test parameter group when the vehicle under test is in a loaded state to obtain a single - lane - change test data group. When the vehicle under test is in an unloaded state, a double lane change test is performed on the vehicle under test with a preset fifth test parameter group, so as to obtain a double lane change test data group; The data acquisition unit is configured to acquire a fixed steering wheel acceleration test data group, a fixed radius acceleration test data group, a J-turn test data group, a single lane change test data group, and a double lane change test data group of the vehicle under test; The performance evaluation unit is configured to evaluate the rollover prevention performance of the vehicle under test according to the fixed steering wheel acceleration test data group, the fixed radius acceleration test data group, and the J-turn test data group to obtain a first evaluation result, and evaluate the direction control performance of the vehicle under test according to the single lane change test data group and the double lane change test data group to obtain a second evaluation result; The optimization management unit is configured to generate a test optimization plan according to the first evaluation result and the second evaluation result, so that the user can optimize the vehicle under test according to the test optimization plan.

7. A test optimization system for an automotive electronic stability system, characterized in that, The test optimization system is applicable to the test optimization method of the vehicle electronic stability system according to any one of claims 1-5, and includes a test optimization module, a data storage module, and a user interaction module. The test optimization module is respectively communicatively connected to the data storage module and the user interaction module. The data storage module is used to store all data, and the user interaction module is used to provide hardware support for the interaction between the user and the test optimization module.

8. The test optimization system for an automotive electronic stability system according to claim 7, wherein The user interaction module includes a touchable display screen / non-touchable display screen, an input keyboard, an indicator light, a microphone, or a speaker.

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