Testing device of steer-by-wire system

Abstract

The invention discloses a testing device of a steer-by-wire system, and relates to the technical field of steer-by-wire, the testing device of the steer-by-wire system comprises a base, a control system, and a steering simulation member, a steering execution member and a load assembly which are installed on the base, and the steering execution member is electrically connected with the steering simulation member; the load assembly comprises an active load assembly and a passive load assembly, the active load assembly and the passive load assembly are installed at the two ends of the steering execution part respectively, and the active load assembly and the passive load assembly can be selectively combined with or disconnected from the steering execution part; the control system is electrically connected with the steering simulation part, the steering execution part and the load assembly. According to the technical scheme provided by the invention, the universality of the testing device of the steer-by-wire system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wire-controlled steering, and in particular to a testing device for a wire-controlled steering system. Background Art

[0002] Steer-by-Wire (SBW) is an advanced vehicle steering technology that uses electronic signals rather than traditional mechanical connections to control the steering of the vehicle.

[0003] During the development of a vehicle's steer-by-wire system, it is necessary to perform simulation tests on the steer-by-wire system assembly in order to verify whether the various performance indicators of the product during use meet the design target values.

[0004] However, the test functions of existing test devices for steer-by-wire systems are relatively simple and cannot meet the test requirements. Summary of the invention

[0005] The main purpose of the present invention is to provide a test device for a steer-by-wire system, aiming to improve the versatility of the test device for the steer-by-wire system.

[0006] To achieve the above object, the present invention provides a test device for a steer-by-wire system, comprising:

[0007] Pedestal;

[0008] A steering simulation component, mounted on the base;

[0009] A steering actuator, mounted on the base, the steering actuator being electrically connected to the steering simulation component;

[0010] A load assembly, mounted on the base, the load assembly comprising an active load assembly and a passive load assembly, the active load assembly and the passive load assembly being respectively mounted at two ends of the steering actuator, and the active load assembly and the passive load assembly being both selectively connectable to or disconnectable from the steering actuator; and

[0011] A control system is electrically connected to the steering simulation component, the steering actuator and the load component respectively; the control system is used to issue a load instruction to the load component, and the load component controls the active load component and the passive load component to load the steering actuator according to the load instruction;

[0012] The control system is used to issue a steering instruction to the steering simulation component, the steering simulation component acts according to the steering instruction and issues a steering signal to the steering actuator, the steering actuator performs a steering action according to the steering signal and transmits the steering action signal to the control system.

[0013] In one embodiment, the active load component and the passive load component are both provided with a coupling member, and the coupling member is used to control the coupling or disconnection of the active load component and the passive load component with the steering actuator.

[0014] In one embodiment, a load detection device is provided at one end of the coupling member facing the steering actuator, and the load detection device is used to detect the load value of the active load component or the passive load component on the steering actuator.

[0015] In one embodiment, the active load component includes a first mounting plate mounted on the base, and a guide rail, a linear drive and an active output shaft mounted on the first mounting plate, the linear drive can move along the guide rail, the linear drive is connected to an active output shaft at one end facing the steering actuator, and the active output shaft is provided with the coupling at one end facing the steering actuator.

[0016] In one embodiment, the linear drive members are provided in plurality, and the plurality of linear drive members are connected in series or in parallel.

[0017] In one embodiment, the passive load assembly includes a second mounting plate mounted on the base, and a damper mounted on the second mounting plate, the damper having a passive output shaft for outputting power, and the coupling is provided at one end of the passive output shaft facing the steering actuator.

[0018] In one embodiment, the damper is provided with a damping adjustment member, and the damping adjustment member is used to adjust the magnitude of the damping force output by the damper; and / or

[0019] The base is also provided with an anti-rotation component, which is used to abut against the coupling component to prevent the passive output shaft from rotating.

[0020] In one embodiment, the testing device of the steer-by-wire system further comprises a multi-axis moving assembly, the steering simulation component is mounted on the multi-axis moving assembly, and the multi-axis moving assembly is used to adjust the relative position between the steering simulation component and the steering actuator.

[0021] In one embodiment, the multi-axis moving assembly includes a first rotating module, a second rotating module, a transverse linear module, a longitudinal linear module, a vertical linear module, and an oblique linear module;

[0022] The transverse linear module is installed on the base, the first rotating module is installed on the moving end of the transverse linear module, the longitudinal linear module is installed on the moving end of the first rotating module, the vertical linear module is installed on the moving end of the longitudinal linear module, the second rotating module is installed on the moving end of the vertical linear module, the oblique linear module is installed on the moving end of the second rotating module, and the steering simulation component is installed on the moving end of the oblique linear module.

[0023] In one embodiment, the testing device for the steer-by-wire system further includes a connecting component, and the connecting component is used to connect the steering simulation component and the steering actuator.

[0024] The technical solution of the present invention is to set a base, a control system, and a steering simulation component, a steering actuator and a load component installed on the base in a test device of a wire-controlled steering system, wherein the steering actuator and the steering simulation component are electrically connected, and the control system is electrically connected to the steering simulation component, the steering actuator and the load component respectively, and the load component includes an active load component and a passive load component respectively installed on both ends of the steering actuator. The control system can control the active load component and the passive load component to selectively connect with the steering actuator according to the test requirements to achieve different loading modes of the steering actuator, thereby simulating different working conditions encountered by the wire-controlled steering system, and further realizing different test requirements, thereby improving the versatility of the test device of the wire-controlled steering system. At the same time, the overall structure of the test device of the wire-controlled steering system is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A structural schematic diagram of an embodiment of a testing device for a steer-by-wire system provided by the present invention;

[0027] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a multi-axis moving component in FIG.

[0028] Description of Figure Numbers:

[0029] 100, base; 200, steering simulation member; 210, driving member; 220, steering simulator; 300, steering actuator; 400, load assembly; 410, active load assembly; 420, passive load assembly; 411, first mounting plate; 412, guide rail; 413, linear drive member; 421, second mounting plate; 422, damper; 423, passive output shaft; 424, damping adjustment member; 425, anti-rotation member; 431, coupling member; 432, fixing member; 433, slidable member; 434, load detection device; 500, multi-axis moving assembly; 510, first rotating module; 520, second rotating module; 530, horizontal linear module; 540, longitudinal linear module; 550, vertical linear module; 560, oblique linear module;

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Steer-by-Wire (SBW) is an advanced vehicle steering technology that uses electronic signals rather than traditional mechanical connections to control the steering of the vehicle.

[0035] During the development of a vehicle's steer-by-wire system, it is necessary to perform simulation tests on the steer-by-wire system assembly in order to verify whether the various performance indicators of the product during use meet the design target values.

[0036] However, the test functions of existing test devices for steer-by-wire systems are relatively simple and cannot meet the test requirements.

[0037] The invention provides a test device for a steer-by-wire system, which is used for testing the steer-by-wire system.

[0038] See also Figure 1 In one embodiment of the present invention, the test device of the wire-controlled steering system includes a base 100, a steering simulator 200, a steering actuator 300, a load assembly 400 and a control system (not shown). It can be understood that various impacts will be generated during the test of the test device of the wire-controlled steering system, and the base 100 needs to have sufficient rigidity to meet the various impacts required for the test. The steering simulator 200, the steering actuator 300 and the load assembly 400 are all installed on the base 100, the steering simulator 200 and the steering actuator 300 are electrically connected, and the load assembly 400 includes an active load assembly 410 and a passive load assembly 420, which are respectively installed at both ends of the steering actuator 300, and the active load assembly 410 and the passive load assembly 420 can be selectively combined with or disconnected from the steering actuator 300.

[0039] It can be understood that the steering simulator 200 is used to simulate the steering wheel assembly, and the steering actuator 300 is used to simulate the wheel-end steering gear. The steering simulator 200 and the steering actuator 300 are electrically connected, so that when the steering simulator 220 turns, the steering simulator 200 can send a turning signal to the steering actuator 300, and the steering actuator 300 implements the turning after receiving the turning signal, thereby driving the wheel to turn. Generally, the steering simulator 200 and the steering actuator 300 are respectively provided with electronic control units to achieve electrical connection between the two.

[0040] The load component 400 is used to simulate the resistance encountered by the steering system of the vehicle, wherein the active load component 410 simulates the actual resistance or torque that needs to be overcome by the steering operation under different working conditions during the actual driving process of the vehicle. The passive load component 420 simulates the resistance faced by the steering system when the vehicle is stationary or driving at a low speed. Generally, the passive load mainly reflects the torque characteristics that do not change rapidly with the driving state.

[0041] In the test device of the wire control steering system, the active load component 410 and the passive load component 420 can be selectively connected to the steering actuator 300 according to the test requirements. In one embodiment, only the active load component 410 is connected to the steering actuator 300, and the steering actuator 300 is in an active loading mode. In one embodiment, only the passive load component 420 is connected to the steering actuator 300, and the steering actuator 300 is in a passive loading mode. In one embodiment, the active load component 410 and the passive load component 420 are respectively connected to the steering actuator 300, and the steering actuator 300 is in an active and passive simultaneous loading mode. In one embodiment, neither the active load component 410 nor the passive load component 420 is connected to the steering actuator 300, and the steering actuator 300 is in a no-load mode.

[0042] The control system is electrically connected to the steering simulation component 200, the steering actuator 300, and the load component 400 respectively; the control system is used to send a load instruction to the load component 400, and the load component 400 controls the active load component 410 and the passive load component 420 to load the steering actuator 300 according to the load instruction. In this way, different loading modes of the steering actuator 300 are realized.

[0043] The control system is used to send a steering instruction to the steering simulation component 200. The steering simulation component 200 acts according to the steering instruction and sends a steering signal to the steering actuator 300. The steering actuator 300 performs a steering action according to the steering signal and transmits the steering action signal to the control system.

[0044] Specifically, according to different test items, the control system sends different steering instructions to the steering simulator 200, and the steering simulator 200 acts according to the steering instructions and sends a steering signal to the steering actuator 300. After receiving the steering signal, the steering actuator 300 performs a steering action and transmits the signal of the steering action to the control system. The control system determines the execution status of the steering actuator 300 according to the received steering action signal of the steering actuator 300, thereby realizing the test of the wire control steering system.

[0045] In one embodiment, the steering simulation component 200 can also feed back its own action signal to the control system after acting according to the steering instruction. The control system detects the execution status of the steering simulation component 200 based on the feedback action signal, thereby further improving the test range of the test device of the wire-controlled steering system.

[0046] The technical solution of the present invention is to set a base 100, a control system, and a steering simulation component 200, a steering actuator 300 and a load component 400 installed on the base 100 in a test device of a wire-controlled steering system, wherein the steering actuator 300 is electrically connected to the steering simulation component 200, the control system is electrically connected to the steering simulation component 200, the steering actuator 300 and the load component 400 respectively, and the load component 400 includes an active load component 410 and a passive load component 420 respectively installed on both ends of the steering actuator 300. The control system can control the active load component 410 and the passive load component 420 to selectively connect with the steering actuator 300 according to the test requirements to realize different loading modes of the steering actuator 300, thereby simulating different working conditions encountered by the wire-controlled steering system, and then can realize different test requirements and improve the versatility of the test device of the wire-controlled steering system. At the same time, the overall structure of the test device of the wire-controlled steering system is simple and easy to operate.

[0047] In an embodiment of the present invention, a coupling member 431 is provided in each of the active load assembly 410 and the passive load assembly 420, and the coupling member 431 is used to control the coupling or disconnection of the active load assembly 410 and the passive load assembly 420 with the steering actuator 300. It can be understood that the coupling member 431 is electrically connected to the control system, and the control system controls the coupling of the active load assembly 410 and the passive load assembly 420 with the steering actuator 300 by controlling the coupling member 431, thereby controlling the loading mode of the steering actuator 300. Compared with the manual coupling and disconnection of the active load assembly 410 and the passive load assembly 420 with the steering actuator 300, the use of the coupling member 431 improves the convenience of switching between different loading modes of the steering actuator 300, and also avoids manual calibration each time the active load assembly 410 and the passive load assembly 420 are coupled with the steering actuator 300.

[0048] In the embodiment of the present invention, a load detection device 434 is provided at one end of the coupling member 431 facing the steering actuator 300 . The load detection device 434 is used to detect the load value of the active load component 410 or the passive load component 420 on the steering actuator 300 .

[0049] It can be understood that the load detection device 434 is electrically connected to the control system. When the coupling 431 is combined with the steering actuator 300, the load detection device 434 on the coupling 431 is used to detect the load value output by the load component 400, and transmit the load value to the control system. The control system determines whether the load value is consistent with the test requirements to avoid deviations in the test conditions, thereby ensuring the test results.

[0050] In one embodiment, when the load value detected by the load detection device 434 does not meet the test condition, the control system controls the load assembly 400 to adjust until the load value meets the test condition.

[0051] In one embodiment, the load detection device 434 may be a force sensor, a strain gauge, a strain sensor, etc., and the specific type of the load detection device 434 is not limited herein.

[0052] In an embodiment of the present invention, the active load component 410 includes a first mounting plate 411 mounted on the base 100, and a guide rail 412, a linear drive 413 and an active output shaft (not shown) mounted on the first mounting plate 411, the linear drive 413 can move along the guide rail 412, and the active output shaft is connected to one end of the linear drive 413 facing the steering actuator 300, and a coupling 431 is provided at one end of the active output shaft facing the steering actuator 300.

[0053] Specifically, the first mounting plate 411 is fixed to the base 100, and a linear drive 413 is installed on the first mounting plate 411. In the active load assembly 410, the linear drive 413 is used as a power source. In one embodiment, the linear drive 413 is configured as a linear drive motor or a hydraulic device. In order to ensure the moving direction of the linear drive 413, a guide rail 412 is also installed on the first mounting plate 411, and the guide rail 412 provides a moving guide for the linear drive 413. An active output shaft is connected to one end of the linear drive 413 facing the steering actuator 300, and a coupling 431 is provided at one end of the active output shaft facing the steering actuator 300, so that the connection between the active output shaft and the steering actuator 300 is achieved through the coupling 431.

[0054] In one embodiment, the coupling member 431 includes a fixed portion 432 and a slidable portion 433, wherein the fixed portion 432 is fixedly sleeved on the active output shaft, the slidable portion 433 can slide relative to the fixed portion 432, and the slidable portion 433 is coaxially arranged with the active output shaft. In this way, the slidable portion 433 is connected and disconnected with the active output shaft by sliding the slidable portion 433 relative to the fixed portion 432, thereby realizing the connection and disconnection of the active load assembly 410 with the steering actuator 300, thereby realizing the active loading or disconnection of the wire control steering system.

[0055] In one embodiment, in order to meet the large load requirement of the active load, a plurality of linear drive members 413 are provided, and the plurality of linear drive members 413 are connected in series or in parallel. Here, the number and connection mode of the linear drive members 413 are not limited.

[0056] In an embodiment of the present invention, the passive load assembly 420 includes a second mounting plate 421 mounted on the base 100, and a damper 422 mounted on the second mounting plate 421, the damper 422 has a passive output shaft 423 for outputting power, and a coupling 431 is provided at one end of the passive output shaft 423 facing the steering actuator 300.

[0057] Specifically, the second mounting plate 421 is fixed on the base 100 to provide a mounting position for other components in the passive load assembly 420. In the passive load assembly 420, a damper 422 is used as a power source, and the damper 422 can be hydraulic damping, air damping, electromagnetic damping, spring damping, etc., which are not limited here. The output shaft of the damper 422 is the passive output shaft 423, and a coupling 431 is installed at one end of the passive output shaft 423 facing the steering actuator 300.

[0058] In one embodiment, the structure of the coupling member 431 in the passive load assembly 420 is consistent with that of the coupling member 431 in the active load assembly 410. The fixed portion 432 is fixedly sleeved on the passive output shaft 423, and the slidable portion 433 is coaxially arranged with the passive output shaft 423. The slidable portion 433 slides relative to the fixed portion 432, thereby connecting or disconnecting the slidable portion 433 from the passive output shaft 423, thereby connecting or disconnecting the passive load assembly 420 from the steering actuator 300, thereby realizing the passive loading of the wire control steering system or disconnecting the passive loading of the wire control steering system.

[0059] In the embodiment of the present invention, a damping adjustment member 424 is provided on the damper 422, and the damping adjustment member 424 is used to adjust the magnitude of the damping force output by the damper 422. The provision of the damping adjustment member 424 allows the magnitude of the damping force output by the damper 422 to be adjustable, thereby achieving the adjustment of the passive loading value of the steering actuator 300, thereby meeting different test requirements, and further improving the versatility of the test device for the wire control steering system.

[0060] In one embodiment, the base 100 is further provided with an anti-rotation member 425, which is used to abut against the coupling member 431 to prevent the rotation of the passive output shaft 423. Specifically, in the scheme shown in the figure of the present invention, the anti-rotation member 425 is configured as an anti-rotation baffle, and the fixing portion 432 in the coupling member 431 abuts against the anti-rotation baffle, thereby avoiding relative rotation between the fixing portion 432 and the anti-rotation baffle, thereby avoiding rotation of the passive output shaft 423 relative to the base 100, so that the passive load assembly 420 only outputs axial force to the steering actuator 300, but does not output rotational force, thereby avoiding damage to the steering actuator 300.

[0061] In one embodiment, the steering simulation member 200 includes a driving member 210 and a steering simulator 220, wherein the driving member 210 is electrically connected to the control system, and the steering simulator 220 is transmission-connected to the driving member 210. The control system controls the driving member 210 to work, and the driving member 210 thereby drives the steering simulator 220 to rotate, thereby simulating the steering of the steering wheel. In this way, the experimenter can test the wire control steering system without manually operating the steering wheel. At the same time, the direct electrical connection between the control system and the driving member 210 is conducive to the accurate realization of the test conditions and is also conducive to improving the test efficiency.

[0062] In one embodiment, the steering simulator 200 includes a steering wheel assembly (not shown), and the tester can manually operate the steering wheel to test the steer-by-wire system. Figure 1 In an embodiment of the present invention, the test device of the wire steering system further includes a multi-axis moving assembly 500, and the steering simulation component 200 is installed on the multi-axis moving assembly 500. The multi-axis moving assembly 500 is used to adjust the relative position between the steering simulation component 200 and the steering actuator 300. The setting of the multi-axis moving assembly 500 can adjust the relative position between the steering wheel assembly and the steering actuator 300, so that the wire steering system can be closer to the actual vehicle state to obtain the actual vehicle experience.

[0063] See also Figure 2 In an embodiment of the present invention, the multi-axis moving assembly 500 includes a first rotating module 510, a second rotating module 520, a transverse linear module 530, a longitudinal linear module 540, a vertical linear module 550 and an oblique linear module 560; the transverse linear module 530 is installed on the base 100, the first rotating module 510 is installed on the moving end of the transverse linear module 530, the longitudinal linear module 540 is installed on the moving end of the first rotating module 510, the vertical linear module 550 is installed on the moving end of the longitudinal linear module 540, the second rotating module 520 is installed on the moving end of the vertical linear module 550, the oblique linear module 560 is installed on the moving end of the second rotating module 520, and the steering simulation component 200 is installed on the moving end of the oblique linear module 560.

[0064] Specifically, the transverse linear module 530 is installed on the base 100, and the transverse linear module 530 can move along the first direction. The first rotating module 510 is installed on the transverse linear module 530. In one embodiment, the first rotating module 510 can rotate 360° along its rotation axis. The first rotating module 510 is installed on the longitudinal linear module 540, and the longitudinal linear module 540 can move along the second direction. The longitudinal linear module 540 is installed on the vertical linear module 550, and the vertical linear module 550 can move along the third direction. Among them, the first direction, the second direction, and the third direction are perpendicular to each other. The second rotating module 520 is installed on the vertical linear module 550. In one embodiment, the second rotating module 520 can rotate 0-90° along its rotation axis to adjust the height of the steering wheel in the steering wheel assembly. The second rotating module 520 is installed on the oblique linear module 560, and the oblique linear module 560 is used to adjust the distance of the steering wheel. In one embodiment, the inclination angle of the oblique linear module 560 relative to the plane where the base 100 is located can be adjusted according to the vehicle model. In this way, through the cooperation of multiple linear modules and multiple rotating modules, the relative position between the steering simulation component 200 and the steering actuator 300 is adjusted, so that the wire control steering system is closer to the actual vehicle state, so that the experimenter can get the actual vehicle experience, which is convenient for the experimenter to test the actual vehicle state more subjectively.

[0065] In one embodiment, the installation positions of the multiple linear modules and the multiple rotating modules in the multi-axis moving assembly 500 can be adjusted according to the test situation, which is not limited here. In other embodiments, the multi-axis moving assembly 500 can also be three linear modules and one rotating module, or only multiple rotating modules, or only multiple linear modules, which is not limited here.

[0066] In an embodiment of the present invention, the testing device for the steer-by-wire system further includes a connecting assembly (not shown), which is used to connect the steering simulation component 200 and the steering actuator 300 .

[0067] Specifically, when the test device of the wire control steering system is assembled, the positions between the active load component 410 and the passive load component 420 and the steering actuator 300 need to be satisfied. When the coupling member 431 is coupled, the active load component 410 and the passive load component 420 can be connected to the steering actuator 300 to transfer the load force. In order to facilitate the adjustment of the positions between the active load component 410, the passive load component 420 and the steering actuator 300, a connecting component is connected between the steering simulator 200 and the steering actuator 300. In this way, the steering simulator 220, the connecting component, and the steering actuator 300 can be driven to move in turn by the multi-axis moving component 500, thereby facilitating the positioning between the steering actuator 300 and the load component 400. In one embodiment, the connecting component is configured as a universal transmission shaft with high strength, low inertia, and constant speed.

[0068] In one embodiment, the steer-by-wire system may be changed to a conventional steering mechanical transmission structure by connecting components, and the steering mechanical transmission structure may be tested.

[0069] In one embodiment, the control system includes a power module, a communication module, an interface module, a first control module, and a second control module, wherein the power module is used to provide power to the control system, the communication module is used to realize the electrical connection between the control system and the load component 400 and the multi-axis moving component 500, and the interface module is used to realize the connection between the control system and the steering simulation component 200 and the steering actuator 300 through a wiring harness. The first control module is used to realize the control system's control of the load component 400 and the multi-axis moving component 500; the second control module is used to realize the control system's control of the steering simulation component 200 and the steering actuator 300. The control system is also provided with a wire control software, which includes a vehicle model, and the vehicle model can simulate the whole vehicle environment to output different test conditions.

[0070] In this way, the test device of the wire control steering system of the present invention can not only carry out RCP, MIL, HIL tests of the wire control steering system, but also carry out functional tests and performance estimation tests of the wire control steering system. Its overall structure is simple, versatile, easy to operate, easy to maintain, and highly reliable, and the test method can meet the standard requirements. The test device of the wire control steering system can realize but is not limited to basic tests, responsiveness tests, accuracy tests, fault response capability tests, integration tests, regulatory compliance tests, extreme condition tests, durability tests, etc., as follows.

[0071] Basic test, inputs test requirements to the steering simulation component 200 and the steering actuator 300 through the control system to verify the basic working conditions of the wire-controlled steering system, including whether the relationship between the steering wheel input and the wheel angle output meets the design requirements, and tests the basic nature of the wire-controlled steering system.

[0072] The responsiveness test inputs the test requirements to the steering simulator 200 and the steering actuator 300 through the control system to evaluate the response speed of the wire-controlled steering system, ensure that after the steering simulator 200 inputs the angle, the steering actuator 300 can give feedback quickly and accurately, and test the responsiveness of the wire-controlled steering system.

[0073] Accuracy test: input test requirements to the steering simulation component 200 and the steering actuator 300 through the control system, check the accuracy of the angle input of the steering simulation component 200 and the output of the steering actuator 300, and test the accuracy of the wire-controlled steering system.

[0074] The stability test outputs different driving conditions (such as high speed, low speed, curve, etc.) to the steering simulation component 200 through the control system, detects and observes the operation of the steering actuator 300, and tests the working stability of the wire control steering system.

[0075] The fault response capability test simulates various possible fault scenarios (such as electronic component failure, communication interruption, etc.) through the control system and outputs them to the steering simulation component 200, detects and observes the operation status of the steering actuator 300 and the software operation status, and evaluates the safety and recovery capability of the wire-controlled steering system when a fault occurs.

[0076] The integration test simulates the whole vehicle environment by controlling the vehicle model of the control system, outputs to the steering simulation component 200 and the steering actuator 300, and observes their operating conditions to evaluate the integration status of the wire control software.

[0077] Regulatory compliance testing, based on traffic regulations and safety standards, edits the vehicle model of the control system, outputs it to the steering simulation component 200 and the steering actuator 300, and observes their operating conditions to evaluate whether the wire control steering system meets all necessary regulatory requirements.

[0078] Extreme condition test, edit the vehicle model of the control system, simulate the data output to the steering simulation component 200 and the steering actuator 300 under extreme weather and road conditions (such as rain, snow, high temperature, low temperature, etc.), and observe their operating conditions to evaluate the performance of the wire control steering system in harsh environments.

[0079] Durability test imports the recorded steering path data into the vehicle model of the control system and outputs it to the steering simulation component 200 and the steering actuator 300 for a long time to evaluate the durability of the wire control steering system.

[0080] Based on the particularity of the intelligent testing system, the steering actuator 300 and the steering simulation component 200 can also be tested separately, or even only the driving component 210 and the electronic control units in the steering simulation component 200 and the steering actuator 300 can be tested.

[0081] The above tests can be selected into no-load test, passive load test and active load test according to actual conditions.

[0082] When the passive load assembly 420 is in combination, the control system can adjust the damping adjustment member 424 according to system requirements to achieve different loading capacity requirements.

[0083] When the active load assembly 410 is in combination, the control system can adjust the first control module in the control system to change the input current of the linear drive member 413 according to system needs, thereby achieving different loading capacity requirements.

[0084] It is worth noting that the control logic between the control system and other structural components mentioned in this article belongs to the prior art and will not be elaborated here.

[0085] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A test device for a steer-by-wire system, characterized in that: include: Pedestal; A steering simulation component, mounted on the base; A steering actuator, mounted on the base, the steering actuator being electrically connected to the steering simulation component; A load assembly is mounted on the base, the load assembly includes an active load assembly and a passive load assembly, the active load assembly and the passive load assembly are respectively mounted at two ends of the steering actuator, and the active load assembly and the passive load assembly can be selectively combined with or disconnected from the steering actuator; as well as A control system is electrically connected to the steering simulation component, the steering actuator and the load component respectively; the control system is used to issue a load instruction to the load component, and the load component controls the active load component and the passive load component to load the steering actuator according to the load instruction; The control system is used to issue a steering instruction to the steering simulation component, the steering simulation component acts according to the steering instruction and issues a steering signal to the steering actuator, the steering actuator performs a steering action according to the steering signal and transmits the steering action signal to the control system.

2. The test device for the steer-by-wire system according to claim 1, characterized in that: The active load component and the passive load component are both provided with a coupling member, and the coupling member is used to control the coupling or disconnection of the active load component and the passive load component with the steering actuator.

3. The test device for the steer-by-wire system according to claim 2, characterized in that: A load detection device is provided at one end of the coupling member facing the steering actuator, and the load detection device is used to detect the load value of the active load component or the passive load component on the steering actuator.

4. The test device for the steer-by-wire system according to claim 2, characterized in that: The active load component includes a first mounting plate mounted on the base, and a guide rail, a linear drive and an active output shaft mounted on the first mounting plate. The linear drive can move along the guide rail, and the active output shaft is connected to one end of the linear drive facing the steering actuator, and the coupling is provided at one end of the active output shaft facing the steering actuator.

5. The test device for the steer-by-wire system according to claim 4, characterized in that: The linear drive members are provided in plurality, and the plurality of linear drive members are connected in series or in parallel.

6. The test device for the steer-by-wire system according to claim 2, characterized in that: The passive load component includes a second mounting plate mounted on the base, and a damper mounted on the second mounting plate. The damper has a passive output shaft for outputting power. The coupling member is disposed at one end of the passive output shaft facing the steering actuator.

7. The test device for the steer-by-wire system according to claim 6, characterized in that: The damper is provided with a damping adjustment member, and the damping adjustment member is used to adjust the magnitude of the damping force output by the damper; and / or The base is also provided with an anti-rotation component, which is used to abut against the coupling component to prevent the passive output shaft from rotating.

8. The test device for a steer-by-wire system according to claim 1, characterized in that: The testing device of the wire-controlled steer system further comprises a multi-axis moving assembly, the steering simulation component is mounted on the multi-axis moving assembly, and the multi-axis moving assembly is used to adjust the relative position between the steering simulation component and the steering actuator.

9. The test device for the steer-by-wire system according to claim 8, characterized in that: The multi-axis moving assembly includes a first rotating module, a second rotating module, a transverse linear module, a longitudinal linear module, a vertical linear module and an oblique linear module; The transverse linear module is installed on the base, the first rotating module is installed on the moving end of the transverse linear module, the longitudinal linear module is installed on the moving end of the first rotating module, the vertical linear module is installed on the moving end of the longitudinal linear module, the second rotating module is installed on the moving end of the vertical linear module, the oblique linear module is installed on the moving end of the second rotating module, and the steering simulation component is installed on the moving end of the oblique linear module.

10. The test device for a steer-by-wire system according to claim 1, characterized in that: The testing device for the wire-controlled steer system further comprises a connecting component, and the connecting component is used to connect the steering simulation component and the steering actuator.

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