Comprehensive performance evaluation method and system for steer-by-wire test bench

Abstract

The invention relates to the technical field of steering-by-wire test stands, and discloses a comprehensive performance evaluation method and system for a steering-by-wire test stand, and the method comprises the steps: collecting the output information of the steering-by-wire test stand in real time; comparing the response time with a standard response time value to obtain a response difference value, and determining a response evaluation value of the steer-by-wire test bed according to the response difference value; comparing the steering parameter with the input parameter, and determining a steering evaluation value of the steer-by-wire test bench; collecting temperature information of the steer-by-wire test bench, and determining a stability evaluation value of the steer-by-wire test bench according to the temperature information; and performing weighted summation on the response evaluation value, the steering evaluation value and the stability evaluation value to obtain a comprehensive performance evaluation value of the steering-by-wire test bed, and determining a performance evaluation grade of the steering-by-wire test bed according to the comprehensive performance evaluation value. By collecting the output information of the test bench in real time, the comprehensive performance of the equipment can be visually known, and the credibility of the evaluation result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of a steer-by-wire test bench, and in particular to a comprehensive performance evaluation method and system for a steer-by-wire test bench. Background Art

[0002] The steer-by-wire system is a new type of automotive steering technology that completely eliminates the physical connection between the steering wheel and the wheel and uses electrical signals to control the steering of the wheel. This system not only retains all the advantages of the traditional mechanical steering system, but also optimizes the angle transfer characteristics that are difficult to achieve with the mechanical system. The main components of the steer-by-wire system include the steering wheel assembly, the steering actuator assembly, the main controller (ECU), and auxiliary systems such as the automatic fail-safe system and the power supply. Specifically, the steering wheel assembly includes components such as the steering wheel, the steering wheel angle sensor, the torque sensor, and the steering wheel return torque motor. The steering actuator assembly is responsible for realizing the steering action of the wheel, while the main controller (ECU), as the core of the system, is responsible for processing the input signal from the steering wheel and controlling the steering actuator assembly through electronic signals. In addition, the steer-by-wire system also includes an electronic control system and a steering system. The former is responsible for processing various sensor inputs to improve the vehicle's handling stability, while the latter specifically performs the steering action. The steer-by-wire test bench is a device and platform used to test and verify the steer-by-wire system. It is mainly used to simulate a real driving environment, test the performance and function of the steer-by-wire system, and ensure its stability and reliability under different working conditions. The steer-by-wire test bench provides a close-to-realistic test environment through the combination of hardware and software, helping developers and testers to evaluate and optimize the design and control strategy of the steer-by-wire system.

[0003] In the prior art, the evaluation indicators of the steer-by-wire test bench are usually too single, often focusing only on one aspect of performance, such as whether it can be fully powered on and whether there are any problems with the circuit connection. It fails to comprehensively consider multiple key parameters, which affects the judgment of the reliability and safety of the steer-by-wire system.

[0004] Therefore, it is necessary to provide a comprehensive performance evaluation method and system for a steer-by-wire test bench to solve the problem that the evaluation indicators of existing steer-by-wire test benches are usually too single. Summary of the invention

[0005] In view of this, the present invention proposes a comprehensive performance evaluation method and system for a steer-by-wire test bench, aiming to solve the problem that the evaluation indicators of existing steer-by-wire test benches are usually too single.

[0006] On the one hand, the present invention provides a comprehensive performance evaluation method for a steer-by-wire test bench, comprising:

[0007] Collecting output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters;

[0008] Comparing the response time with a standard response time value to obtain a response difference, and determining a response evaluation value of the steer-by-wire test bench according to the response difference;

[0009] Comparing the steering parameter with the input parameter to determine a steering evaluation value of the steer-by-wire test bench;

[0010] collecting temperature information of the steer-by-wire test bench, and determining a stability evaluation value of the steer-by-wire test bench according to the temperature information;

[0011] A comprehensive performance evaluation value of the steer-by-wire test bench is obtained by weighted summing the response evaluation value, the steering evaluation value and the stability evaluation value, and a performance evaluation grade of the steer-by-wire test bench is determined according to the size of the comprehensive performance evaluation value.

[0012] Furthermore, the response time includes angle change response time, speed change response time, start response time and braking response time;

[0013] The steering parameters include steering direction and steering angle.

[0014] Furthermore, the step of comparing the response time with a standard response time value to obtain a response difference, and determining a response evaluation value of the steer-by-wire test bench according to the response difference comprises:

[0015] Setting a response time standard value, wherein the response time standard value includes an angle change response time standard value, a speed change response time standard value, a start response time standard value, and a braking response time standard value;

[0016] Compare the response time standard value with its corresponding response time, obtain the number of response times greater than the corresponding response time standard value, and determine the response evaluation value according to the number;

[0017] Calculate the response difference between each response time standard value and its corresponding response time to obtain the response difference average value, and determine whether to adjust the response evaluation value based on the response difference average value. If adjustment is required, adjust the response evaluation value based on the size of the response difference average value.

[0018] Furthermore, the step of comparing each response time standard value with its corresponding response time, obtaining the number of response times greater than the response time standard value, and determining the response evaluation value according to the number includes:

[0019] Set the response evaluation value to Xi, i=1, 2, 3; if the number of response times greater than the response time standard value is zero, the response evaluation value is X1, if the number is less than or equal to 2, the response evaluation value is X2, if the number is greater than 2, the response evaluation value is X3, where 100=X1>X2>X3≥0.

[0020] Further, the calculation of the response difference between each response time standard value and its corresponding response time to obtain a response difference average value, judging whether to adjust the response evaluation value according to the response difference average value, and if it is judged that adjustment is required, adjusting the response evaluation value according to the magnitude of the response difference average value, includes:

[0021] When the response evaluation value is X2 and X3, the maximum value of the response difference average value is set, and if the response difference average value is less than the maximum value of the response difference average value, it is determined to keep the response evaluation value unchanged;

[0022] If the response difference average value is greater than or equal to the response difference average value maximum value, it is determined to reduce the response evaluation value; if the response evaluation value is X2, the response evaluation value is adjusted to X3; if the response evaluation value is X3, the response evaluation value is kept unchanged.

[0023] Furthermore, the comparing the steering parameter with the input parameter to determine the steering evaluation value of the steer-by-wire test bench includes:

[0024] The input parameters include an input rotation direction and an input rotation angle;

[0025] If the steering direction is different from the input rotation direction, the steering evaluation value is determined to be zero; if the steering direction is the same as the input rotation direction, the steering evaluation value is determined according to the difference between the steering angle and the input rotation angle.

[0026] Furthermore, if the steering direction is the same as the input rotation direction, determining the steering evaluation value according to the difference between the steering angle and the input rotation angle includes:

[0027] The steering evaluation value is set to Yi, i=1, 2, 3; the maximum angle difference value is pre-set, and if the difference between the steering angle and the input rotation angle is zero, the steering evaluation value is determined to be Y1;

[0028] If the difference between the steering angle and the input rotation angle is greater than zero and less than or equal to the maximum angle difference, determining the steering evaluation value to be Y2;

[0029] If the difference between the steering angle and the input rotation angle is greater than the maximum angle difference, determining the steering evaluation value to be Y3;

[0030] Among them, 100=Y1>Y2>Y3≥0.

[0031] Furthermore, the collecting of the temperature information of the steer-by-wire test bench and determining the stability evaluation value of the steer-by-wire test bench according to the temperature information includes:

[0032] Preset a stability evaluation value Z i, i=1, 2, 3; set a maximum temperature, collect the temperature value of the steer-by-wire test bench in real time, and if the temperature values ​​are all less than the maximum temperature, determine the stability evaluation value to be Z1; if there is a temperature value greater than or equal to the maximum temperature, determine the stability evaluation value to be Z2;

[0033] A maximum temperature change value is preset. When the temperature change value between two adjacent time nodes is less than the maximum temperature change value, the stability evaluation value is judged to remain unchanged; when the temperature change value between two adjacent time nodes is greater than or equal to the maximum temperature change value, the stability evaluation value is judged to be reduced; wherein, if the stability evaluation value is Z1, it is adjusted to Z2; if the stability evaluation value is Z2, it is adjusted to Z3; if the stability evaluation value is Z3, it remains unchanged;

[0034] Among them, 100=Z1>Z2>Z3≥0.

[0035] Furthermore, the weighted sum of the response evaluation value, the steering evaluation value and the stability evaluation value to obtain a comprehensive performance evaluation value of the steer-by-wire test bench, and determining the performance evaluation level of the steer-by-wire test bench according to the size of the comprehensive performance evaluation value includes:

[0036] Set the performance evaluation value to S;

[0037] S = a*Xi+b*Yi+c*Zi;

[0038] Wherein, a represents the response evaluation value weight coefficient, b represents the steering evaluation value weight coefficient, c represents the stability evaluation value weight coefficient, a+b+c=1;

[0039] Set a first performance evaluation value S1 and a second performance evaluation value S2, S1>S2;

[0040] If S>S1, the performance evaluation level is determined to be level one;

[0041] If S1≥S≥S2, the performance evaluation level is determined to be level 2;

[0042] If S2>S, the performance evaluation level is determined to be level three;

[0043] The performance of the first-level steer-by-wire test bench is better than that of the second-level steer-by-wire test bench, and the performance of the second-level steer-by-wire test bench is better than that of the third-level steer-by-wire test bench.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention has many benefits by collecting the output information of the test bench in real time and evaluating its response time, steering parameters and the impact of temperature on stability. First, the method accurately evaluates the reaction speed of the test bench by comparing the response time with the standard value; secondly, the evaluation of the steering parameters can reflect the accuracy and consistency of the test bench when simulating different steering conditions; by collecting and analyzing temperature information, the stability of the test bench under different environmental conditions can be further judged. This method calculates the comprehensive performance evaluation value by weighted summation of multiple performance indicators, providing a systematic and quantitative evaluation standard, which can provide an objective reference basis for different testing needs. The grading mechanism of the comprehensive performance evaluation value also helps to quickly determine the overall status of the test bench, helping users to intuitively understand the comprehensive performance of the test bench, and improving the detection efficiency and the credibility of the results.

[0046] On the other hand, the present application also provides a comprehensive performance evaluation system for a steer-by-wire test bench, comprising:

[0047] A collection module is configured to collect output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters;

[0048] a response evaluation value determination module, configured to compare the response time with a standard response time value, obtain a response difference, and determine a response evaluation value of the steer-by-wire test bench according to the response difference;

[0049] a steering evaluation value determination module, configured to compare the steering parameter with an input parameter to determine a steering evaluation value of the steer-by-wire test bench;

[0050] a stability evaluation value determination module, configured to collect temperature information of the steer-by-wire test bench and determine a stability evaluation value of the steer-by-wire test bench according to the temperature information;

[0051] The evaluation grade module is configured to obtain a comprehensive performance evaluation value of the steering-by-wire test bench by weighted summing up the response evaluation value, the steering evaluation value and the stability evaluation value, and determine the performance evaluation grade of the steering-by-wire test bench according to the size of the comprehensive performance evaluation value.

[0052] It can be understood that the comprehensive performance evaluation method and system for a wire-controlled steering test bench provided in the present application have the same beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0054] Figure 1 A flow chart of a comprehensive performance evaluation method for a steer-by-wire test bench provided in an embodiment of the present invention;

[0055] Figure 2 A functional block diagram of a comprehensive performance evaluation system for a steer-by-wire test bench provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] In some embodiments of the present application, see Figure 1 As shown, this embodiment provides a comprehensive performance evaluation method for a steer-by-wire test bench, comprising the following steps:

[0058] S100, collecting output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters;

[0059] S200, comparing the response time with a standard response time value to obtain a response difference, and determining a response evaluation value of the steer-by-wire test bench according to the response difference;

[0060] S300, comparing the steering parameter with the input parameter to determine a steering evaluation value of the steer-by-wire test bench;

[0061] S400, collecting temperature information of the steer-by-wire test bench, and determining a stability assessment value of the steer-by-wire test bench according to the temperature information;

[0062] S500, obtaining a comprehensive performance evaluation value of the steer-by-wire test bench by weighted summing up the response evaluation value, the steering evaluation value and the stability evaluation value, and determining a performance evaluation grade of the steer-by-wire test bench according to the size of the comprehensive performance evaluation value.

[0063] It can be understood that the present invention has many benefits by collecting the output information of the test bench in real time and evaluating its response time, steering parameters and the impact of temperature on stability. First, the method accurately evaluates the reaction speed of the test bench by comparing the response time with the standard value; secondly, the evaluation of the steering parameters can reflect the accuracy and consistency of the test bench when simulating different steering conditions; by collecting and analyzing temperature information, the stability of the test bench under different environmental conditions can be further judged to ensure the reliability and durability of its operation. This method calculates the comprehensive performance evaluation value by weighted summation of multiple performance indicators, providing a systematic and quantitative evaluation standard, which can provide an objective reference basis for different testing needs. The grading mechanism of the comprehensive performance evaluation value also helps to quickly determine the overall status of the test bench, helping users to intuitively understand the comprehensive performance of the equipment, and improving the detection efficiency and the credibility of the results.

[0064] Specifically, a steer-by-wire system with standard response time and steering parameters is installed on the test bench to be evaluated, and the test bench is evaluated. By collecting the output information of the steer-by-wire system on the test bench and comparing the output information with the standard information, an accurate evaluation of the output accuracy of the test bench can be made. Taking the test bench disclosed with application number 200910066983.8 as an example, the response time, steering parameters and temperature information of the steer-by-wire system of the test bench are obtained.

[0065] Further, the response time includes angle change response time, speed change response time, start response time and brake response time;

[0066] Steering parameters include steering direction and steering angle.

[0067] Specifically, the angle change response time refers to the response time from the input angle information to the output angle change of the wire-controlled steering system, the speed change response time refers to the response time from the input speed time to the output speed change of the wire-controlled steering system, the start response time refers to the response time from the input start signal to the start of the wire-controlled steering system, and the braking response time refers to the response time from the input braking signal to the braking of the wire-controlled steering system; the steering direction refers to the output steering direction of the wire-controlled steering system, and the steering angle refers to the output steering angle of the wire-controlled steering system.

[0068] Furthermore, the response time is compared with the standard response time value to obtain the response difference, and the response evaluation value of the steer-by-wire test bench is determined according to the response difference, including:

[0069] Setting a response time standard value, wherein the response time standard value includes an angle change response time standard value, a speed change response time standard value, a start response time standard value, and a braking response time standard value;

[0070] Compare the response time standard value with its corresponding response time, obtain the number of response times greater than the corresponding response time standard value, and determine the response evaluation value according to the number;

[0071] Calculate the response difference between each response time standard value and its corresponding response time to obtain the response difference average value, and determine whether to adjust the response evaluation value based on the response difference average value. If adjustment is required, adjust the response evaluation value based on the size of the response difference average value.

[0072] Furthermore, each response time standard value is compared with its corresponding response time, and the number of response times greater than the response time standard value is obtained. When the response evaluation value is determined according to the number, it includes:

[0073] Set the response evaluation value to Xi, i=1, 2, 3; if the number of response times greater than the response time standard value is zero, the response evaluation value is X1, if the number is less than or equal to 2, the response evaluation value is X2, if the number is greater than 2, the response evaluation value is X3, where 100=X1>X2>X3≥0.

[0074] Further, the response difference between each response time standard value and its corresponding response time is calculated to obtain the response difference average value, and whether to adjust the response evaluation value is determined according to the response difference average value. If it is determined that adjustment is required, the response evaluation value is adjusted according to the size of the response difference average value, including:

[0075] When the response evaluation value is X2 and X3, the maximum value of the response difference average is set. If the response difference average is less than the maximum value of the response difference average, the response evaluation value is judged to remain unchanged.

[0076] If the response difference average is greater than or equal to the response difference average maximum, it is determined to reduce the response evaluation value; if the response evaluation value is X2, the response evaluation value is adjusted to X3; if the response evaluation value is X3, the response evaluation value remains unchanged.

[0077] It can be understood that by refining the evaluation of response time and steering parameters, the accuracy and operability of the evaluation are significantly improved. First, by setting the standard value of each response time separately, the response capability of each link can be analyzed in detail, so that any delay or abnormality can be quickly identified. By comparing the actual response time with the standard value, not only can the overall response performance of the test bench be judged by quantity, but also the response evaluation value can be dynamically adjusted by calculating the average value of the response difference to ensure the flexibility and accuracy of the evaluation. This grading mechanism enables the evaluation value to be automatically adjusted when the response time exceeds the standard value too much, thus providing a more adaptive and detailed evaluation framework for the evaluation. Ultimately, this approach ensures that the performance evaluation of the test bench can reflect all kinds of possible response problems.

[0078] Furthermore, when comparing the steering parameters with the input parameters to determine the steering evaluation value of the steer-by-wire test bench, it includes:

[0079] The input parameters include input rotation direction and input rotation angle;

[0080] If the steering direction is different from the input rotation direction, the steering evaluation value is determined to be zero; if the steering direction is the same as the input rotation direction, the steering evaluation value is determined according to the difference between the steering angle and the input rotation angle.

[0081] Furthermore, if the steering direction is the same as the input rotation direction, determining the steering evaluation value according to the difference between the steering angle and the input rotation angle includes:

[0082] The steering evaluation value is set to Yi, i=1, 2, 3; the maximum angle difference is pre-set, and if the difference between the steering angle and the input rotation angle is zero, the steering evaluation value is determined to be Y1;

[0083] If the difference between the steering angle and the input rotation angle is greater than zero and less than or equal to the maximum angle difference, the steering evaluation value is determined to be Y2;

[0084] If the difference between the steering angle and the input rotation angle is greater than the maximum angle difference, the steering evaluation value is determined to be Y3;

[0085] Among them, 100=Y1>Y2>Y3≥0.

[0086] It is understandable that by directly comparing the steering direction with the input rotation direction, it is possible to quickly identify whether there is a direction error in the test bench signal output, and promptly determine the steering evaluation value to be zero, thereby effectively preventing the occurrence of potential faults. When the directions match, the difference between the steering angle and the input angle is used to further refine the evaluation, so that the accuracy of the test bench response can be quantified. The preset maximum angle difference ensures the standardization of the evaluation, so that under different response conditions, high, medium, and low evaluation levels (Y1, Y2, Y3) can be given respectively, providing clear feedback information for the operator. This refined evaluation method can not only reflect the performance of the test bench in real time, but also provide reliable data support for subsequent test bench optimization and fault diagnosis.

[0087] Furthermore, when collecting the temperature information of the steer-by-wire test bench and determining the stability evaluation value of the steer-by-wire test bench according to the temperature information, it includes:

[0088] Preset a stability evaluation value Z i, i=1, 2, 3; set a maximum temperature, collect the temperature value of the steer-by-wire test bench in real time, and if the temperature values ​​are all less than the maximum temperature, determine the stability evaluation value to be Z1; if there is a temperature value greater than or equal to the maximum temperature, determine the stability evaluation value to be Z2;

[0089] The maximum temperature change value is preset. When the temperature change value between two adjacent time nodes is less than the maximum temperature change value, the stability evaluation value is judged to be unchanged; when the temperature change value between two adjacent time nodes is greater than or equal to the maximum temperature change value, the stability evaluation value is judged to be reduced; wherein, if the stability evaluation value is Z1, it is adjusted to Z2; if the stability evaluation value is Z2, it is adjusted to Z3; if the stability evaluation value is Z3, it remains unchanged;

[0090] Among them, 100=Z1>Z2>Z3≥0.

[0091] It is understandable that collecting temperature information of the steer-by-wire test bench and performing stability assessment can provide important guarantees for the performance of the test bench. Temperature, as a key operating parameter, directly affects the stability and safety of the test bench. If the temperature exceeds the preset maximum value, the stability assessment value is automatically reduced. This process helps to detect potential overheating problems or other heat-related failures in a timely manner and avoid serious performance losses or equipment damage. In addition, the step-by-step adjustment of the stability assessment ensures the accuracy and sensitivity of the assessment, helping engineers take appropriate maintenance or repair measures at an early stage, ultimately extending the service life of the test bench and improving its overall operating efficiency and reliability.

[0092] Furthermore, the response evaluation value, the steering evaluation value and the stability evaluation value are weighted and summed to obtain a comprehensive performance evaluation value of the steer-by-wire test bench. When the performance evaluation level of the steer-by-wire test bench is determined according to the size of the comprehensive performance evaluation value, it includes:

[0093] Set the performance evaluation value to S;

[0094] S=a*Xi+b*Yi+c*Zi;

[0095] Wherein, a represents the response evaluation value weight coefficient, b represents the steering evaluation value weight coefficient, c represents the stability evaluation value weight coefficient, a+b+c=1;

[0096] Set a first performance evaluation value S1 and a second performance evaluation value S2, S1>S2;

[0097] If S>S1, the performance evaluation level is determined to be level one;

[0098] If S1≥S≥S2, the performance evaluation level is determined to be level 2;

[0099] If S2>S, the performance evaluation level is determined to be level three;

[0100] The performance of the first-level steer-by-wire test bench is better than that of the second-level steer-by-wire test bench, and the performance of the second-level steer-by-wire test bench is better than that of the third-level steer-by-wire test bench.

[0101] It can be understood that the present invention provides a systematic and scientific method for the evaluation of the wire steering test bench by obtaining a comprehensive performance evaluation value obtained by weighted summation of the response evaluation value, the steering evaluation value and the stability evaluation value. This weighting method not only takes into account the importance of each indicator, but also reflects the comprehensive performance of the test bench under different operating conditions. Setting clear performance evaluation levels makes the evaluation results more intuitive and facilitates quick judgment of the performance status of the test bench. When the comprehensive evaluation value is higher than the set S1, it can be identified as a first-level performance, indicating that the test bench is in the best performance state; and the second and third-level performance evaluations provide a basis for the maintenance and optimization of the equipment. This clear level division helps engineers quickly identify performance problems in actual applications and take corresponding measures to improve them, thereby improving the reliability and safety of the wire steering system and ensuring its effectiveness and stability in actual driving.

[0102] On the other hand, see Figure 2 As shown, the present application also provides a comprehensive performance evaluation system for a steer-by-wire test bench, which is used to apply the above-mentioned comprehensive performance evaluation method for a steer-by-wire test bench, including:

[0103] A collection module is configured to collect output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters;

[0104] a response evaluation value determination module, configured to compare the response time with a standard response time value, obtain a response difference, and determine a response evaluation value of the steer-by-wire test bench according to the response difference;

[0105] a steering evaluation value determination module configured to compare the steering parameter with the input parameter to determine a steering evaluation value of the steer-by-wire test bench;

[0106] a stability evaluation value determination module, configured to collect temperature information of the steer-by-wire test bench and determine a stability evaluation value of the steer-by-wire test bench according to the temperature information;

[0107] The evaluation grade module is configured to obtain a comprehensive performance evaluation value of the steer-by-wire test bench by weighted summation of the response evaluation value, the steering evaluation value and the stability evaluation value, and determine the performance evaluation grade of the steer-by-wire test bench according to the size of the comprehensive performance evaluation value.

[0108] It can be understood that the comprehensive performance evaluation system for the wire-controlled steering test bench provides an efficient and comprehensive performance evaluation method through modular design. The acquisition module can obtain output information in real time to ensure the timeliness and accuracy of the data, thereby providing a reliable basis for subsequent evaluation. The response evaluation value determination module and the steering evaluation value determination module enable the system to conduct detailed comparative analysis of different parameters and quickly identify potential problems. The stability evaluation value determination module further enhances the safety of the system by monitoring temperature information to ensure that the test bench operates under appropriate operating conditions. Finally, the evaluation level module weights and sums the evaluation values ​​to form a comprehensive performance evaluation value, making the performance evaluation more scientific and objective, helping engineers to quickly make performance judgments and take necessary measures, and ultimately improving the overall reliability and operating efficiency of the wire-controlled steering system, ensuring that its performance in actual applications meets safety and performance standards.

[0109] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0110] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A comprehensive performance evaluation method for a steer-by-wire test bench, characterized in that: include: Collecting output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters; Comparing the response time with a standard response time value to obtain a response difference, and determining a response evaluation value of the steer-by-wire test bench according to the response difference; Comparing the steering parameter with the input parameter to determine a steering evaluation value of the steer-by-wire test bench; collecting temperature information of the steer-by-wire test bench, and determining a stability evaluation value of the steer-by-wire test bench according to the temperature information; A comprehensive performance evaluation value of the steer-by-wire test bench is obtained by weighted summing the response evaluation value, the steering evaluation value and the stability evaluation value, and a performance evaluation grade of the steer-by-wire test bench is determined according to the size of the comprehensive performance evaluation value.

2. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 1, characterized in that: The response time includes angle change response time, speed change response time, start response time and braking response time; The steering parameters include steering direction and steering angle.

3. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 2, characterized in that: The step of comparing the response time with a standard response time value to obtain a response difference, and determining a response evaluation value of the steer-by-wire test bench according to the response difference comprises: Setting a response time standard value, wherein the response time standard value includes an angle change response time standard value, a speed change response time standard value, a start response time standard value, and a braking response time standard value; Compare the response time standard value with its corresponding response time, obtain the number of response times greater than the corresponding response time standard value, and determine the response evaluation value according to the number; Calculate the response difference between each response time standard value and its corresponding response time to obtain the response difference average value, and determine whether to adjust the response evaluation value based on the response difference average value. If adjustment is required, adjust the response evaluation value based on the size of the response difference average value.

4. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 3, characterized in that: The step of comparing each response time standard value with its corresponding response time, obtaining the number of response times greater than the response time standard value, and determining the response evaluation value according to the number includes: Set the response evaluation value to Xi, i=1, 2, 3; if the number of response times greater than the response time standard value is zero, the response evaluation value is X1, if the number is less than or equal to 2, the response evaluation value is X2, if the number is greater than 2, the response evaluation value is X3, where 100=X1>X2>X3≥0.

5. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 4, characterized in that: The step of calculating the response difference between each response time standard value and the response time corresponding thereto to obtain a response difference average value, and judging whether to adjust the response evaluation value according to the response difference average value, and if it is judged that adjustment is required, then adjusting the response evaluation value according to the magnitude of the response difference average value, comprises: When the response evaluation value is X2 and X3, the maximum value of the response difference average value is set, and if the response difference average value is less than the maximum value of the response difference average value, it is determined to keep the response evaluation value unchanged; If the response difference average value is greater than or equal to the response difference average value maximum value, it is determined to reduce the response evaluation value; if the response evaluation value is X2, the response evaluation value is adjusted to X3; if the response evaluation value is X3, the response evaluation value is kept unchanged.

6. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 5, characterized in that: The step of comparing the steering parameter with the input parameter to determine the steering evaluation value of the steer-by-wire test bench includes: The input parameters include an input rotation direction and an input rotation angle; If the steering direction is different from the input rotation direction, the steering evaluation value is determined to be zero; if the steering direction is the same as the input rotation direction, the steering evaluation value is determined according to the difference between the steering angle and the input rotation angle.

7. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 6, characterized in that: If the steering direction is the same as the input rotation direction, determining the steering evaluation value according to the difference between the steering angle and the input rotation angle comprises: The steering evaluation value is set to Yi, i=1, 2, 3; the maximum angle difference value is pre-set, and if the difference between the steering angle and the input rotation angle is zero, the steering evaluation value is determined to be Y1; If the difference between the steering angle and the input rotation angle is greater than zero and less than or equal to the maximum angle difference, determining the steering evaluation value to be Y2; If the difference between the steering angle and the input rotation angle is greater than the maximum angle difference, determining the steering evaluation value to be Y3; Among them, 100=Y1>Y2>Y3≥0.

8. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 7, characterized in that: The collecting of the temperature information of the steer-by-wire test bench and determining the stability evaluation value of the steer-by-wire test bench according to the temperature information comprises: Preset a stability evaluation value Zi, i=1, 2, 3; set a maximum temperature, collect the temperature value of the steer-by-wire test bench in real time, and if the temperature values ​​are all less than the maximum temperature, determine the stability evaluation value to be Z1; if there is a temperature value greater than or equal to the maximum temperature, determine the stability evaluation value to be Z2; A maximum temperature change value is preset. When the temperature change value between two adjacent time nodes is less than the maximum temperature change value, the stability evaluation value is judged to be unchanged; when the temperature change value between two adjacent time nodes is greater than or equal to the maximum temperature change value, the stability evaluation value is judged to be reduced; wherein, if the stability evaluation value is Z1, it is adjusted to Z2; if the stability evaluation value is Z2, it is adjusted to Z3; if the stability evaluation value is Z3, it remains unchanged; Among them, 100=Z1>Z2>Z3≥0.

9. The comprehensive performance evaluation method for a steer-by-wire test bench according to claim 8, characterized in that: The step of obtaining a comprehensive performance evaluation value of the steer-by-wire test bench by weighted summing the response evaluation value, the steering evaluation value and the stability evaluation value, and determining a performance evaluation grade of the steer-by-wire test bench according to the comprehensive performance evaluation value comprises: Set the performance evaluation value to S; S = a*Xi+b*Yi+c*Zi; Wherein, a represents the response evaluation value weight coefficient, b represents the steering evaluation value weight coefficient, c represents the stability evaluation value weight coefficient, a+b+c=1; Set a first performance evaluation value S1 and a second performance evaluation value S2, S1>S2; If S>S1, the performance evaluation level is determined to be level one; If S1≥S≥S2, the performance evaluation level is determined to be level 2; If S2>S, the performance evaluation level is determined to be level three; The performance of the first-level steer-by-wire test bench is better than that of the second-level steer-by-wire test bench, and the performance of the second-level steer-by-wire test bench is better than that of the third-level steer-by-wire test bench.

10. A comprehensive performance evaluation system for a steer-by-wire test bench, used for applying the comprehensive performance evaluation method for a steer-by-wire test bench as claimed in any one of claims 1 to 9, characterized in that: include: A collection module is configured to collect output information of the steer-by-wire test bench in real time, wherein the output information includes response time and steering parameters; a response evaluation value determination module, configured to compare the response time with a standard response time value, obtain a response difference, and determine a response evaluation value of the steer-by-wire test bench according to the response difference; a steering evaluation value determination module, configured to compare the steering parameter with an input parameter to determine a steering evaluation value of the steer-by-wire test bench; a stability evaluation value determination module, configured to collect temperature information of the steer-by-wire test bench and determine a stability evaluation value of the steer-by-wire test bench according to the temperature information; The evaluation grade module is configured to obtain a comprehensive performance evaluation value of the steering-by-wire test bench by weighted summing up the response evaluation value, the steering evaluation value and the stability evaluation value, and determine the performance evaluation grade of the steering-by-wire test bench according to the size of the comprehensive performance evaluation value.

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