Test device for a steer-by-wire system

Abstract

The application discloses a kind of test devices of steer-by-wire system, it is related to steer-by-wire technical field, wherein, the test device of steer-by-wire system includes pedestal, control system, and is installed in pedestal steering simulation piece, steering execution piece and load assembly, steering execution piece is electrically connected with steering simulation piece;Load assembly includes active load assembly and passive load assembly, active load assembly and passive load assembly are respectively installed at the both ends of steering execution piece, active load assembly and passive load assembly can selectively be combined with steering execution piece or disconnected;Control system is electrically connected with steering simulation piece, steering execution piece and load assembly respectively.The technical scheme provided by the application improves the versatility of the test device of steer-by-wire system.

Description

Technical Field

[0001] This invention relates to the field of steer-by-wire technology, and in particular to a testing device for a steer-by-wire system. Background Technology

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

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

[0004] However, the existing testing equipment for steer-by-wire systems has limited testing capabilities and cannot meet testing requirements. Summary of the Invention

[0005] The main objective of this invention is to provide a testing device for a steer-by-wire system, aiming to improve the versatility of such testing devices.

[0006] To achieve the above objectives, the present invention provides a testing apparatus for a steer-by-wire system, comprising:

[0007] Base;

[0008] A steering simulator is mounted on the base;

[0009] A steering actuator is mounted on the base and is electrically connected to the steering simulation component.

[0010] A load assembly, mounted on the base, includes an active load assembly and a passive load assembly, which are respectively mounted at both ends of the steering actuator. Both the active and passive load assemblies can be selectively engaged or disengaged from the steering actuator.

[0011] The 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 load commands 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 commands;

[0012] The control system is used to issue a steering command to the steering simulator, the steering simulator acts according to the steering command and sends 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, both the active load component and the passive load component are provided with a coupling member, which is used to control the engagement or disengagement of the active load component and the passive load component with the steering actuator.

[0014] In one embodiment, the coupling is provided with a load detection device at one end facing the steering actuator, the load detection device being 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 assembly includes a first mounting plate mounted on the base, a guide rail, a linear drive, and an active output shaft mounted on the first mounting plate. The linear drive is movable along the guide rail, and the active output shaft is connected to one end of the linear drive facing the steering actuator. The coupling member is provided at one end of the active output shaft facing the steering actuator.

[0016] In one embodiment, multiple linear drive members are provided, and the multiple 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 being 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 element, which 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 connecting component to prevent the passive output shaft from rotating.

[0020] In one embodiment, the testing apparatus for the steer-by-wire system further includes a multi-axis moving component, on which the steering simulator is mounted, and the multi-axis moving component is used to adjust the relative position between the steering simulator and the steering actuator.

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

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

[0023] In one embodiment, the testing apparatus for the steer-by-wire system further includes a connecting component for connecting the steering simulator and the steering actuator.

[0024] The technical solution of this invention involves setting up a base, a control system, and a steering simulator, a steering actuator, and a load assembly mounted on the base in a test device for a steer-by-wire system. The steering actuator and the steering simulator are electrically connected. The control system is electrically connected to the steering simulator, the steering actuator, and the load assembly. The load assembly includes an active load assembly and a passive load assembly mounted on both ends of the steering actuator. The control system can selectively connect the active and passive load assemblies to the steering actuator according to test requirements, thereby achieving different loading modes for the steering actuator and simulating different operating conditions encountered by the steer-by-wire system. This allows for different test requirements to be met, improving the versatility of the steer-by-wire system test device. Furthermore, the overall structure of the steer-by-wire system test device is simple and easy to operate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

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

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

[0028] Explanation of icon numbers:

[0029] 100. Base; 200. Steering simulator; 210. Drive unit; 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 unit; 421. Second mounting plate; 422. Damper; 423. Passive output shaft; 424. Damping adjustment unit; 425. Anti-rotation unit; 431. Connecting unit; 432. Fixing part; 433. Sliding part; 434. Load detection device; 500. Multi-axis moving assembly; 510. First rotating module; 520. Second rotating module; 530. Lateral linear module; 540. Longitudinal linear module; 550. Vertical linear module; 560. Diagonal linear module;

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

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

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

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

[0036] However, the existing testing equipment for steer-by-wire systems has limited testing capabilities and cannot meet testing requirements.

[0037] This invention proposes a testing device for a steer-by-wire system, used for testing steer-by-wire systems.

[0038] Please see Figure 1 In one embodiment of the present invention, the test device for the steer-by-wire system includes a base 100, a steering simulator 200, a steering actuator 300, a load assembly 400, and a control system (not shown). It is understood that various impacts will occur during the testing process of the steer-by-wire system test device, and the base 100 needs to have sufficient rigidity to withstand these impacts. The steering simulator 200, steering actuator 300, and load assembly 400 are all mounted on the base 100. The steering simulator 200 and steering actuator 300 are electrically connected. The load assembly 400 includes an active load assembly 410 and a passive load assembly 420, which are respectively mounted at both ends of the steering actuator 300. Both the active load assembly 410 and the passive load assembly 420 can be selectively engaged or disengaged from the steering actuator 300.

[0039] Understandably, the steering simulator 200 simulates the steering wheel assembly, and the steering actuator 300 simulates the wheel-end steering mechanism. The steering simulator 200 and the steering actuator 300 are electrically connected so that when the steering simulator 220 turns, the steering simulator 200 sends a steering signal to the steering actuator 300. Upon receiving the steering signal, the steering actuator 300 performs the steering, thereby turning the wheels. Generally, both the steering simulator 200 and the steering actuator 300 contain electronic control units to achieve electrical connection between them.

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

[0041] In the testing apparatus for the steering system by wire, the active load component 410 and the passive load component 420 can be selectively connected to the steering actuator 300 according to testing requirements. In one embodiment, only the active load component 410 is connected to the steering actuator 300, in which case the steering actuator 300 is in active loading mode. In another embodiment, only the passive load component 420 is connected to the steering actuator 300, in which case the steering actuator 300 is in 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, in which case the steering actuator 300 is in simultaneous active and passive loading mode. In another embodiment, neither the active load component 410 nor the passive load component 420 is connected to the steering actuator 300, in which case the steering actuator 300 is in no-load mode.

[0042] The control system is electrically connected to the steering simulator 200, the steering actuator 300, and the load assembly 400, respectively. The control system issues load commands to the load assembly 400, which in turn controls the active load assembly 410 and the passive load assembly 420 to load the steering actuator 300 according to the load commands. In this way, different loading modes of the steering actuator 300 are achieved.

[0043] The control system issues steering commands to the steering simulator 200, which then acts according to the steering commands and sends a steering signal to the steering actuator 300. The steering actuator 300 performs the steering action according to the steering signal and transmits the steering action signal to the control system.

[0044] Specifically, depending on the test item, the control system issues different steering commands to the steering simulator 200. The steering simulator 200 acts according to the steering commands and sends a steering signal to the steering actuator 300. After receiving the steering signal, the steering actuator 300 performs the steering action and transmits the steering action signal to the control system. The control system judges the execution status of the steering actuator 300 based on the received steering action signal from the steering actuator 300, thereby realizing the test of the steer-by-wire system.

[0045] In one embodiment, after the steering simulator 200 acts according to the steering command, it can also feed back its own action signal to the control system. The control system detects the execution status of the steering simulator 200 based on the feedback action signal, thereby further improving the test range of the test device for the steer-by-wire system.

[0046] The technical solution of this invention involves setting up a base 100, a control system, and a steering simulator 200, a steering actuator 300, and a load assembly 400 mounted on the base 100 in a test device for a steer-by-wire system. The steering actuator 300 and the steering simulator 200 are electrically connected. The control system is electrically connected to the steering simulator 200, the steering actuator 300, and the load assembly 400. The load assembly 400 includes an active load assembly 410 and a passive load assembly 420 respectively mounted on both ends of the steering actuator 300. The control system can selectively connect the active load assembly 410 and the passive load assembly 420 to the steering actuator 300 according to test requirements, thereby achieving different loading modes for the steering actuator 300. This simulates different working conditions encountered by the steer-by-wire system, thus fulfilling different test requirements and improving the versatility of the test device. Furthermore, the overall structure of the steer-by-wire system test device is simple and easy to operate.

[0047] In embodiments of the present invention, both the active load component 410 and the passive load component 420 are provided with a coupling member 431. The coupling member 431 is used to control the engagement or disengagement of the active load component 410 and the passive load component 420 with the steering actuator 300. It is understood that the coupling member 431 is electrically connected to the control system, and the control system controls the engagement of the active load component 410 and the passive load component 420 with the steering actuator 300 by controlling the coupling member 431, thereby controlling the loading mode of the steering actuator 300. Compared to the manual engagement and disengagement of the active load component 410 and the passive load component 420 with the steering actuator 300, the use of the coupling member 431 improves the ease of switching between different loading modes of the steering actuator 300 and avoids manual calibration each time the active load component 410 and the passive load component 420 engage with the steering actuator 300.

[0048] In an embodiment of the present invention, a load detection device 434 is provided at one end of the coupling 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] Understandably, the load detection device 434 is electrically connected to the control system. When the coupling 431 is coupled 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 in order to avoid deviations in the test conditions and thus ensure the test results.

[0050] In one embodiment, when the load value detected by the load detection device 434 does not meet the test conditions, the control system will control the load component 400 to adjust until the load value meets the requirements of the test conditions.

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

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

[0053] Specifically, a first mounting plate 411 is fixed to the base 100, and a linear drive component 413 is mounted on the first mounting plate 411. In the active load assembly 410, the linear drive component 413 serves as the power source. In one embodiment, the linear drive component 413 is configured as a linear drive motor or a hydraulic device. To ensure the direction of movement of the linear drive component 413, a guide rail 412 is also mounted on the first mounting plate 411, providing movement guidance for the linear drive component 413. An active output shaft is connected to one end of the linear drive component 413 facing the steering actuator 300, and a coupling component 431 is provided at the other end of the active output shaft facing the steering actuator 300, thereby achieving the connection between the active output shaft and the steering actuator 300 through the coupling component 431.

[0054] In one embodiment, the coupling 431 includes a fixed portion 432 and a slidable portion 433, wherein the fixed portion 432 is fixedly sleeved on the active output shaft, and the slidable portion 433 is slidable relative to the fixed portion 432, and the slidable portion 433 is coaxially arranged with the active output shaft. Thus, by sliding the slidable portion 433 relative to the fixed portion 432, the connection and disconnection of the slidable portion 433 and the active output shaft are realized, thereby realizing the connection and disconnection of the active load assembly 410 and the steering actuator 300, thereby realizing the active loading or disconnection of the steer-by-wire system.

[0055] In one embodiment, to meet the high load requirements of the active load, multiple linear drive units 413 are provided, which can be connected in series or in parallel. No restrictions are placed on the number or connection method of the linear drive units 413.

[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 member 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 to the base 100 to provide mounting positions for other components in the passive load assembly 420. In the passive load assembly 420, a damper 422 is used as the power source. The damper 422 can be a hydraulic damper, an air damper, an electromagnetic damper, a spring damper, etc., and there are no restrictions here. The output shaft of the damper 422 is the passive output shaft 423, and a coupling member 431 is mounted on the end of the passive output shaft 423 facing the steering actuator 300.

[0058] In one embodiment, the coupling member 431 in the passive load assembly 420 and the coupling member 431 in the active load assembly 410 have the same structure. The fixed part 432 is fixedly sleeved on the passive output shaft 423, and the slidable part 433 is coaxially arranged with the passive output shaft 423. By sliding the slidable part 433 relative to the fixed part 432, the slidable part 433 can be connected or disconnected from the passive output shaft 423, thereby enabling the passive load assembly 420 to engage or disengage from the steering actuator 300, thus achieving passive loading or disconnection of the steer-by-wire system.

[0059] In an embodiment of the present invention, the damper 422 is provided with a damping adjustment member 424, which is used to adjust the magnitude of the damping force output by the damper 422. The damping adjustment member 424 allows the magnitude of the damping force output by the damper 422 to be adjustable, thereby adjusting the passive loading value of the steering actuator 300 to meet different testing requirements and improve the versatility of the testing device for the steer-by-wire system.

[0060] In one embodiment, the base 100 is further provided with an anti-rotation member 425, which abuts against the coupling member 431 to prevent rotation of the passive output shaft 423. Specifically, in the embodiment shown in the figures of the present invention, the anti-rotation member 425 is configured as an anti-rotation baffle, and the fixing part 432 in the coupling member 431 abuts against the anti-rotation baffle, thereby preventing relative rotation between the fixing part 432 and the anti-rotation baffle, and thus preventing rotation of the passive output shaft 423 relative to the base 100. This allows the passive load assembly 420 to output axial force only to the steering actuator 300, without outputting rotational force, thereby preventing damage to the steering actuator 300.

[0061] In one embodiment, the steering simulator 200 includes a drive component 210 and a steering simulator 220. The drive component 210 is electrically connected to a control system, and the steering simulator 220 is drively connected to the drive component 210. The control system controls the drive component 210 to operate, thereby driving the steering simulator 220 to rotate, thus simulating steering wheel steering. In this way, the experimenter can test the steer-by-wire system without manually operating the steering wheel. Furthermore, the direct electrical connection between the control system and the drive component 210 facilitates accurate achievement of test conditions and improves test efficiency.

[0062] In one embodiment, the steering simulator 200 includes a steering wheel assembly (not shown), allowing the experimenter to test the steer-by-wire system by manually operating the steering wheel. See also... Figure 1 In an embodiment of the present invention, the testing apparatus for the steer-by-wire system further includes a multi-axis movement component 500. A steering simulator 200 is mounted on the multi-axis movement component 500, which is used to adjust the relative position between the steering simulator 200 and the steering actuator 300. The multi-axis movement component 500 allows for adjustment of the relative position between the steering wheel assembly and the steering actuator 300, thereby enabling the steer-by-wire system to more closely resemble the real vehicle's condition and provide a realistic driving experience.

[0063] Please see 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 mounted on the base 100, the first rotating module 510 is mounted on the moving end of the transverse linear module 530, the longitudinal linear module 540 is mounted on the moving end of the first rotating module 510, the vertical linear module 550 is mounted on the moving end of the longitudinal linear module 540, the second rotating module 520 is mounted on the moving end of the vertical linear module 550, the oblique linear module 560 is mounted on the moving end of the second rotating module 520, and the steering simulation component 200 is mounted on the moving end of the oblique linear module 560.

[0064] Specifically, a lateral linear module 530 is mounted on the base 100 and is movable along a first direction. A first rotating module 510 is mounted on the lateral linear module 530. In one embodiment, the first rotating module 510 can rotate 360° along its rotation axis. A longitudinal linear module 540 is mounted on the first rotating module 510 and is movable along a second direction. A vertical linear module 550 is mounted on the longitudinal linear module 540 and is movable along a third direction. The first, second, and third directions are perpendicular to each other. A second rotating module 520 is mounted 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. An oblique linear module 560 is mounted on the second rotating module 520 and is used to adjust the distance of the steering wheel. In one embodiment, the tilt angle of the oblique linear module 560 relative to the plane of the base 100 can be adjusted according to the vehicle model. Thus, by coordinating multiple linear modules and multiple rotating modules, the relative positions between the steering simulation component 200 and the steering actuator 300 are adjusted, making the steer-by-wire system more closely resemble the actual vehicle state. This allows testers to obtain a real-vehicle experience, facilitating more subjective testing of the actual vehicle's condition.

[0065] In one embodiment, the mounting positions of the multiple linear modules and multiple rotary modules in the multi-axis motion assembly 500 can be adjusted according to the test conditions, and are not limited herein. In other embodiments, the multi-axis motion assembly 500 may also have three linear modules and one rotary module, or only multiple rotary modules, or only multiple linear modules, and are not limited herein.

[0066] In an embodiment of the present invention, the test apparatus for the steer-by-wire system further includes a connecting component (not shown) for connecting the steering simulator 200 and the steering actuator 300.

[0067] Specifically, during the assembly of the test device for the online steering system, the positions of the active load component 410 and the passive load component 420 with the steering actuator 300 must meet certain requirements. After the coupling component 431 is engaged, the active load component 410 and the passive load component 420 can connect with the steering actuator 300 to transmit load force. To facilitate adjustment of the positions of the active load component 410, the passive load component 420, and the steering actuator 300, a connecting component is provided between the steering simulator 200 and the steering actuator 300. Thus, the multi-axis moving component 500 can sequentially drive the steering simulator 220, the connecting component, and the steering actuator 300 to move, thereby facilitating accurate positioning of the steering actuator 300 and the load component 400. In one embodiment, the connecting component is configured as a universal drive shaft with high strength, low inertia, and constant velocity.

[0068] In one embodiment, the steer-by-wire system can also be changed to a traditional steering mechanical transmission structure by connecting components, thereby allowing the steering mechanical transmission structure to be tested.

[0069] In one embodiment, the control system includes a power supply module, a communication module, an interface module, a first control module, and a second control module. The power supply module provides power to the control system. The communication module enables the control system to electrically connect with the load component 400 and the multi-axis motion component 500. The interface module connects the control system with the steering simulator 200 and the steering actuator 300 via wiring harnesses. The first control module controls the load component 400 and the multi-axis motion component 500. The second control module controls the steering simulator 200 and the steering actuator 300. The control system also includes drive-by-wire software, which includes a vehicle model that can simulate a full-vehicle environment to output different test conditions.

[0070] Thus, the steer-by-wire system testing device of the present invention can not only perform RCP, MIL, and HIL tests on steer-by-wire systems, but also perform functional tests and performance prediction tests. Its overall structure is simple, highly versatile, easy to operate and maintain, and highly reliable. The testing methods meet standard requirements. The steer-by-wire system testing device can perform, 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 detailed below.

[0071] Basic testing involves inputting test requirements to the steering simulator 200 and steering actuator 300 through the control system to verify the basic operation of the steer-by-wire system, including whether the relationship between steering wheel input and wheel angle output meets the design requirements, thus testing the basic functionality of the steer-by-wire system.

[0072] The responsiveness test involves inputting test requirements to the steering simulator 200 and the steering actuator 300 through the control system to evaluate the response speed of the steer-by-wire system. This ensures that the steering actuator 300 can respond quickly and accurately after the steering simulator 200 inputs an angle, thus testing the responsiveness of the steer-by-wire system.

[0073] Accuracy testing involves inputting test requirements to the steering simulator 200 and steering actuator 300 through the control system, checking the accuracy of the angle input of the steering simulator 200 and the output of the steering actuator 300, and testing the accuracy of the steer-by-wire system.

[0074] Stability testing involves outputting different driving conditions (such as high speed, low speed, and curves) to the steering simulator 200 through the control system, detecting and observing the operation of the steering actuator 300, and testing the working stability of the steer-by-wire 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. The operation of the steering actuator 300 and the software operation are detected and observed to evaluate the safety and recovery capability of the steer-by-wire system when a fault occurs.

[0076] Integration testing involves simulating the vehicle environment using a vehicle model of the control system, outputting the results to the steering simulator 200 and steering actuator 300, observing their operation, and evaluating the status of the steer-by-wire software integration.

[0077] Regulatory compliance testing involves editing the vehicle model of the control system according to traffic regulations and safety standards, outputting the data to the steering simulator 200 and steering actuator 300, observing their operation, and evaluating whether the steer-by-wire system meets all necessary regulatory requirements.

[0078] Extreme condition testing involves editing the vehicle model of the control system, simulating data output to the steering simulator 200 and steering actuator 300 under extreme weather and road conditions (such as rain, snow, high temperature, low temperature), and observing their operation to evaluate the performance of the steer-by-wire system in harsh environments.

[0079] Durability testing involves importing the collected steering data into the vehicle model of the control system and outputting it to the steering simulator 200 and steering actuator 300 for long-term operation to evaluate the durability of the steer-by-wire system.

[0080] Due to the special nature of the intelligent testing system, the steering actuator 300 and steering simulation component 200 can be tested separately, or even only the drive component 210 and the electronic control unit in the steering simulation component 200 and steering actuator 300 can be tested.

[0081] The above tests can be performed using either no-load testing, passive loading testing, or active loading testing, depending on the actual situation.

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

[0083] When the active load component 410 is engaged, the control system can adjust the input current of the linear drive component 413 by adjusting the first control module within the control system according to the system requirements, 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 is existing technology and will not be elaborated here.

[0085] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A testing device for a steer-by-wire system, characterized in that, include: Base; A steering simulator is mounted on the base; A steering actuator is mounted on the base and is 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 both ends of the steering actuator. Both the active load assembly and the passive load assembly can be selectively engaged with or disengaged from the steering actuator. as well as The 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 load commands 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 commands; The control system is used to issue a steering command to the steering simulator, the steering simulator acts according to the steering command and sends 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; Both the active load component and the passive load component are provided with a coupling member, which is used to control the engagement or disengagement of the active load component and the passive load component with the steering actuator. The active load assembly 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 active output shaft is connected to one end of the linear drive facing the steering actuator. The coupling member is provided at one end of the active output shaft facing the steering actuator.

2. The testing apparatus for the steer-by-wire system as described in claim 1, characterized in that, The coupling is provided with a load detection device at one end facing the steering actuator. 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.

3. The testing apparatus for the steer-by-wire system as described in claim 1, characterized in that, The linear drive unit is provided in multiple ways, and the multiple linear drive units are connected in series or in parallel.

4. The testing apparatus for the steer-by-wire system as described in claim 1, characterized in that, The passive load assembly 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, and the coupling is provided at one end of the passive output shaft facing the steering actuator.

5. The test apparatus for the steer-by-wire system as described in claim 4, characterized in that, The damper is equipped with a damping adjustment component, which 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 connecting component to prevent the passive output shaft from rotating.

6. The testing apparatus for the steer-by-wire system as described in claim 1, characterized in that, The test device for the steer-by-wire system also includes a multi-axis moving component, on which the steering simulator is mounted. The multi-axis moving component is used to adjust the relative position between the steering simulator and the steering actuator.

7. The test apparatus for the steer-by-wire system as described in claim 6, 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 mounted on the base, the first rotating module is mounted on the moving end of the transverse linear module, the longitudinal linear module is mounted on the moving end of the first rotating module, the vertical linear module is mounted on the moving end of the longitudinal linear module, the second rotating module is mounted on the moving end of the vertical linear module, the oblique linear module is mounted on the moving end of the second rotating module, and the steering simulation component is mounted on the moving end of the oblique linear module.

8. The testing apparatus for the steer-by-wire system as described in claim 1, characterized in that, The test apparatus for the steer-by-wire system further includes a connecting component for connecting the steering simulator and the steering actuator.

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