712results about "Vehicle steering/rolling behaviour" patented technology

The invention discloses an automatic driving vehicle key signal testing method and system based on real data driving. According to the method, data are collected in a real road scene, test cases are automatically generated, a standard test case library is constructed, hierarchical or parallel testing is carried out in virtual simulation, hardware-in-the-loop and real vehicle environments, and result feedback and closed-loop iteration are achieved through automatic analysis. The system comprises a data collection module, a test case generation module, a standard test case library module, a test execution module and a result feedback module. According to the invention, the problems of insufficient scene coverage and low authenticity and efficiency of the existing test method are solved, the comprehensiveness, authenticity and test efficiency of the test scene are improved, and the safety and reliability of the key signal system of the automatic driving vehicle are guaranteed.

A vehicle component balancing robot apparatus, system and method for on vehicle balancing of one or more of a tire, a wheel, bearings, brake components, and vehicle components that impart vibrations to the vehicle. The apparatus includes a frame arranged so as to connect with the vehicle. A robot of the apparatus moves relative to the frame, and is configured so that the move, relative to the frame, resolves a predetermined location of a tire-wheel assembly relative to a reference frame of the robot. The robot has at least one end effector arranged to interface the tire-wheel assembly and the robot moves the at least one end effector to other predetermined locations on a wheel rim of the tire-wheel assembly, determined based on resolution of the predetermined location of the tire-wheel assembly relative to the reference frame.

The invention discloses an electric power steering-by-wire intelligent test system, and the system comprises a rotation angle and torque collection module which is used for collecting a steering wheel rotation angle and a steering wheel input torque; the motor acquisition module is used for acquiring motor information; the rack acquisition module is used for acquiring rack information; the vehicle acquisition module is used for acquiring vehicle information; the data processing module is used for processing the steering wheel angle, the steering wheel input torque, the motor information, the steering rack information and the vehicle information to generate test evaluation information; and the information sending module is used for sending the test evaluation information to a preset receiving terminal. According to the invention, comprehensive acquisition of multi-source heterogeneous data and environmental adaptability testing can be realized, and an efficient and accurate technical tool is provided for research and development optimization, quality control and engineering application of an electric power steering-by-wire system.

The embodiment of the invention discloses an automobile power-assisted steering test system and method, and relates to the technical field of automobile electronics. An EPS controller in the automobile power-assisted steering test system is used for acquiring an input torque generated by a driver simulation motor through an angle torque sensor; according to the input torque and the state information of the vehicle, the power-assisted torque needing to be output by the EPS motor in the steering process is determined; the power-assisted torque is sent to an EPS motor, so that the EPS motor assists the vehicle in steering; if the input torque, the power-assisted torque and the actual resistance torque of the rocker arm end are balanced in the steering process of the vehicle, and the amplitude and the variation trend of the power-assisted torque all accord with the preset power-assisted characteristic curve, the vehicle power-assisted steering test passes. Therefore, by introducing a driver steering wheel input part and a steering resistance simulation part, the automobile power-assisted steering test system can simulate the working principle of a steering system more truly, so that the test precision and effect are improved.

The invention belongs to the technical field of vehicle steering control, and relates to a van semitrailer steering synchronization angle closed-loop test calibration system, which comprises the following steps of: firstly, executing a static steering test on a no-load combined vehicle, and constructing a mapping reference table of a saddle space position and an ideal hinge angle; then multi-working-condition dynamic steering testing is carried out on the load combination vehicle, vehicle frame deformation data are collected in real time, the deformation data are converted into a hinge angle compensation value through a pre-trained deformation mechanical model, selective correction is carried out on the actually-measured hinge angle based on a deformation compensation starting threshold value, a calibration target is generated to reversely analyze the target saddle position, and the target saddle position is corrected; the problem that in the prior art, inevitable elastic structure deformation and real mechanical steering asynchronous faults of the van semitrailer under the actual dynamic load working condition cannot be fully considered and distinguished is effectively solved, and then multi-working-condition driving verification data are collected, deformation mechanical model parameters are iteratively updated, and a compensation threshold value generation strategy is generated. And closed-loop optimization is realized.

The invention provides an off-line test method and an off-line test device for a vehicle steering system, and the method comprises the steps: controlling a vehicle to run according to a preset test track through activating an automatic driving mode of the vehicle; in the running process of the vehicle, running state data of the vehicle are collected in real time; and comparing the operation state data with a preset quality standard, and generating an offline test result of the vehicle steering system based on a comparison result. In the mode, the vehicle is controlled to run along the preset test track by adopting automatic driving, so that the test control precision of the vehicle steering system can be improved, and the accuracy and consistency of off-line test are further improved.

The invention discloses a recirculating ball type electric power steering system fault self-checking method and system and a readable medium, and relates to the technical field of vehicles, and the method comprises the steps: storing a signal transmission path and each function node, determining the type of an influence factor which influences the instruction execution accuracy of the function node, and determining the instruction execution accuracy of the function node; analyzing and acquiring the relationship between the fluctuation amplitude of the data signal at each function node and the numerical value of the influence factor, storing the relationship as a correction model, and storing a first relationship model for reflecting the data association relationship among the function nodes on the same signal transmission path; acquiring real-time data and source data of various impact factors, and generating theoretical response data according to the first relation model, the real-time impact factor data and the correction model; the actual response data is collected, the deviation amplitude between the actual response data and the theoretical response data is calculated, whether the function node breaks down or has a potential fault is judged according to the deviation amplitude, early warning is output, and the fault detection accuracy and the potential fault pre-judgment capability are greatly improved through the technical scheme.

The invention discloses a steering column performance test bench and a test method thereof, and relates to the technical field of steering column performance test. The steering column performance test bench comprises a detection bench, a servo motor and a driving assembly, and is used for driving the upper surface of the detection bench to rotate. A first hydraulic rod is hinged to the mounting frame, a same connecting plate is hinged to the other end of the first hydraulic rod and the lower position of the outward side of the mounting frame, two clamping pieces are arranged on the upper side and the lower side of the outer side of the connecting plate, and the upper clamping piece and the lower clamping piece on the same side are used in cooperation and used for clamping a steering column; and the moving assembly is used for driving the mounting frame, the first hydraulic rod above the mounting frame, the clamping piece and the steering column to do horizontal reciprocating motion. According to the invention, multiple performance tests can be carried out on the same steering column in sequence, the automation degree is high, the overall test time is shortened, and the test efficiency is improved.

A test system and method for testing a coupled hybrid dynamic system in simulated motion along a path includes a physical test rig configured to test a physical component. A processor is configured with at least one virtual model portion and a physical component comprising the coupled hybrid dynamic system. The processor is configured to control the test rig such that the component under test and the at least one virtual model portion travel along a path. A method is provided for generating an initial input to begin with in an iterative process to obtain a suitable input for the at least one virtual portion.

The invention provides a vehicle NVH comfort assessment method and device based on sound and vibration fusion and electronic equipment. The method comprises the following steps: performing in-vehicle interference noise identification processing on window-level data in a candidate window set to obtain a candidate effective window set; calculating a sound and vibration consistency index between the in-vehicle audio signal and the in-vehicle vertical acceleration signal for the window-level data in the candidate effective window set, and screening an external noise dominant window to obtain an effective window set; respectively calculating an acoustic index and a vibration index based on the effective window set, and performing calibration compensation on the acoustic index and the vibration index based on the sensor calibration information; and performing fusion calculation based on the data volume information of the effective window set, the working condition coverage information, the uncertainty information corresponding to the sensor calibration information and the proportion information of the effective window set in the candidate window set to obtain a comprehensive confidence index. According to the method, the evaluation accuracy and stability can be improved, the cross-equipment comparability is enhanced, and the result credibility is improved.

The present disclosure relates to a device for detecting and identifying play and checking the attachment of wheel, steering-assembly and suspension parts of vehicles. The device includes a linearly displaceable carriage and a supporting plate which is configured to support a wheel of a vehicle. The supporting plate is rotatable, and the carriage is displaceable with respect to the supporting plate in a direction corresponding to the transverse direction of the vehicle. Additionally, the carriage includes a rotatable structure which is configured to rotate the supporting plate about an axis of rotation.

The sensor comprises two Hall type steering wheel angle sensors which are coaxially installed at a steering wheel transmission shaft, the models of the two Hall type steering wheel angle sensors are consistent, and the two Hall type steering wheel angle sensors are independently connected to a data processing module. When torque generated after the steering wheel is stressed acts on the steering wheel transmission shaft (1), a tubular column of the steering wheel transmission shaft deforms, rotation angles of deformation in different areas in the axial direction are different, and the two Hall type steering wheel angle sensors detect the tubular column rotation angles in the installation areas of the Hall type steering wheel angle sensors respectively and output the tubular column rotation angles to the data processing module. The data processing module calculates the torque borne by the steering wheel according to the angular deviation of the tubular column rotation angle measured by the two Hall type steering wheel angle sensors. Through cooperative work of the two sensors, the torque measuring function can be achieved, and the redundancy safety performance of the system can be improved.

A method of testing a vehicle includes positioning the vehicle on a dynamometer, operating a propulsion system to rotate drive wheels at a one or more predetermined speeds while actively adjusting a rotational position of a steering wheel to maintain straight vehicle travel on the dynamometer, measuring angle data of the steering wheel during the active adjusting of the rotational position of the steering wheel, checking the measured angle data to determine if it is outside a predetermined angular range, and outputting, in response to the angle data being outside the predetermined angular range, at least one of a repair ticket and a vehicle fault code.

The utility model provides a linear load mechanism for a steering abnormal sound test. The linear load mechanism comprises a mounting seat, a power source, an output rod, a sensor and an adapter, a connecting screw hole is formed in one end, far away from the output rod, of the sensor; the adapter piece comprises a first adapter unit, a second adapter unit and a fixing piece, the first adapter unit comprises a first connecting plate and a first connector, the second adapter unit comprises a second connecting plate and a second connector, and an adapter hole extending perpendicular to the second connecting plate is formed in the middle of the second connector; the first connecting plate is provided with a first connecting hole, the second connecting plate is provided with a plurality of second connecting holes corresponding to the first connecting hole, and the first connecting plate and the second connecting plate can be relatively fixed through the fixing piece. According to the utility model, by observing the fitting condition of the first connecting plate and the second connecting plate, whether the connecting plate is in the optimal butt joint direction or not can be quickly judged and adjusted, and the preparation time before an abnormal sound test is saved.

The invention relates to an emergency steering system detection method and device and an emergency steering system detector. The emergency steering system detection method includes: stopping communication between a vehicle and an emergency steering system to enable the emergency steering system to be controlled; sending a speed signal to an emergency steering system; and under the condition that a feedback signal sent by the emergency steering system is received, whether the function of the emergency steering system is normal or not is determined according to the speed signal and the feedback signal. By stopping the communication between the vehicle and the emergency steering system and sending the speed signal to the emergency steering system, the environmental condition of the fault of the main steering system of the vehicle can be simulated in the vehicle off-line detection process, so that the function of the emergency steering system is detected. Moreover, as the feedback signal is related to the speed signal, whether the function of the emergency steering system is normal or not can be determined through the feedback signal and the speed signal, so that the accuracy of function detection is improved.

A method for detecting an early life failure of an electrical connection of a power harness of a steering system of a vehicle, the method comprising using a processor configured to execute instructions: obtaining a resistance measurement associated with an electrical power delivery system comprising the electrical connection; obtaining historical resistance data; obtaining at least one limit based on at least one of the historical resistance data and the functional limit; detecting an early life failure of the electrical connection based on a comparison between the resistance measurement and the at least one limit; in response to detecting the early life fault, at least one action is performed.

The embodiment of the invention provides a steer-by-wire test method, device and equipment for vehicle entering and exiting a curve and a medium, and belongs to the technical field of vehicle test. Comprising the steps that a vehicle basic model is obtained, a vehicle test model is built based on the vehicle basic model, and the vehicle test model is a vehicle parameterized model comprising a steer-by-wire system; constructing a test scene, wherein the test scene at least comprises a bend entering scene entering a ramp and a bend exiting scene leaving the ramp; based on the vehicle test model, virtual tests are executed in the bend-in scene and the bend-out scene respectively, the virtual tests are that a driver carries out simulated driving in the test scene, and objective test data and subjective evaluation of the driver are obtained; and determining objective evaluation according to the objective test data, and determining a test result of the steer-by-wire system according to the objective evaluation and the subjective evaluation. The invention aims to improve the testing accuracy of the steer-by-wire system so as to improve the design quality of the steer-by-wire system.

The invention provides a vehicle simulation test device and a vehicle simulation test method. The device comprises a first base, a second base and four dynamometers, the dynamometer comprises a lifting assembly, and a steering assembly, a roll assembly and a roller assembly which are arranged on the lifting assembly. The lifting assembly is used for lifting the steering assembly, the steering assembly is used for rotating the roll assembly, and the roll assembly is used for the roll roller assembly. Through the lifting assemblies which are arranged on the left side and the right side of the tested vehicle and have different heights and the side inclination angles of the side inclination assemblies which are adaptively adjusted according to the angles of the lifting assemblies on the left side and the right side of the tested vehicle, the driving conditions of the vehicle at the transverse gradient and wheel side inclination are simulated. Through the lifting assemblies which are arranged at the front end and the rear end of the tested vehicle and have different heights, the driving condition of the vehicle at the longitudinal slope is simulated; the roller assembly is driven through the steering assembly, and the driving condition of vehicle steering is simulated.

The invention discloses a method for testing an electric power steering system assembly, and belongs to the technical field of automobile part testing. The technical problems that in an existing testing method, static and dynamic testing processes are separated, testing efficiency is low, and quantitative evaluation on key dynamic performance parameters is difficult are solved. According to the invention, a test tool comprising a simulation rack, a driving device, an encoder, a torque sensor and a data acquisition card is adopted, and a control and processing module automatically executes a continuous test process: firstly, performing a static assistance test on an assembly, and judging qualification; and if the test is qualified, the test is automatically switched to dynamic test, a torque command signal is sent to the assembly, an output shaft is driven to rotate forwards and backwards, a position and a feedback torque signal are collected, and dynamic response parameters such as a position dispersion error, power-assisted delay time and overshoot are calculated. The method is mainly used for comprehensive performance testing and quality evaluation of the electric power steering system assembly in the production manufacturing or maintenance after-sales link.

The invention provides a driving unit steering performance test method and device, a medium and equipment, and the method comprises the steps: building a whole vehicle simulation model based on a set verification working condition and whole vehicle information; generating a simulation result based on the whole vehicle simulation model and the verification working condition; based on the simulation result, calculating to obtain a load time domain curve on each wheel; inputting the load time domain curve into a steering performance test bench system carrying a driving unit to obtain an actual measurement result of the steering performance test bench system under the verification working condition; calculating an error rate between the simulation result and the actual measurement result; if the error rate is smaller than a preset error rate threshold value, the steering performance test bench system is adopted to test the driving unit under the test working condition, and an evaluation index is obtained; based on the evaluation index, the steering performance of the driving unit is determined, so that the steering performance of the driving unit can be accurately tested, and the consistency of test results can be ensured.

The invention discloses a permanent magnet synchronous motor open-phase detection method and system, a medium and a product. The method comprises the following steps: acquiring a real-time three-phase current and a real-time load state of the steering motor; multiplying the absolute value of the real-time three-phase current by a preset coefficient to obtain a target three-phase current; respectively carrying out accumulation calculation on the target three-phase current to obtain a three-phase current accumulation sum; when the current cumulative sum exceeds a preset cumulative sum threshold value, or the steering angle of a steering wheel of a target vehicle corresponding to the steering motor changes, the three-phase current cumulative sum is reset to be a preset three-phase current cumulative sum; calculating an accumulated ratio set; obtaining a specific value threshold value corresponding to each accumulated specific value in the accumulated specific value set; determining whether there is an accumulated ratio exceeding a ratio threshold; if yes, adding one to the phase loss times; if not, zero setting is carried out on the phase loss times; and when the phase loss frequency exceeds a preset frequency threshold value, executing an early warning strategy. By implementing the above technical scheme, the accuracy of open-phase fault detection of the permanent magnet synchronous motor is improved.

A steering model controller in a chassis dynamometer of the disclosure executes a turning determination process of determining whether a driving state of a vehicle is a steering / turning state or a driving straight state based on comparison results between a turning radius for determination and turning radii for comparison calculated based on left steering angle information and right steering angle information. Then, the steering model controller executes a turning control process as a roller control process to be executed in determining that the vehicle is in the steering / turning state. The turning control process is a process of outputting, to a roller driving mechanism, four roller driving commands at which four rollers adapt to the steering / turning state of the vehicle and are rotationally driven.

The invention discloses an automatic calibration method for an automobile steering zero position, which comprises the following steps of: performing zero position calibration in the running process of an automobile, monitoring the running state of the automobile in real time when the zero position calibration is performed, judging whether the automobile is in a zero position meeting state or not based on the running state of the automobile, and if so, executing the step 2; if yes, the steering position at the moment serves as the zero position to be stored in the EPS controller; and if not, continuously monitoring the vehicle driving state. The method has the advantages that the calibration operation of the steering zero position is achieved in an automatic identification and automatic calibration mode, and the user experience is improved; according to the scheme, the current running state is automatically recognized, the current straight running state of the vehicle is obtained, whether zero position calibration is carried out or not is judged based on the straight running state, and the zero position is recorded, so that zero position calibration is accurate and reliable and can be carried out automatically, and meanwhile the hardware cost is low.

The invention relates to the field of steering control test production, in particular to an intelligent networked automobile steering control test platform which comprises a test platform body, and two parallel wheel grooves are symmetrically formed in the test platform body. The two testing grooves are formed in the two wheel grooves, and angle sensors are installed on the testing grooves; the wheel is clamped in the horizontal direction and the circumferential direction at the same time in the mode that the vertical clamping piece and the arc-shaped clamping piece are combined, it is ensured that the wheel does not shake or move in the testing process, the air bag auxiliary assembly is introduced, the gap between the wheel and the clamping piece is filled by means of the inflation expansion characteristic of the air cushion, and the testing accuracy is improved. Compared with the prior art, friction force is increased, the clamping effect is further stabilized, clamping stability is improved, damage of rigid clamping to the surface of the wheel is avoided, the problem that the wheel is prone to sliding or displacement in the testing process is effectively solved, and clamping firmness and stability are ensured.

The invention relates to the technical field of vehicle fault diagnosis, and particularly discloses a vehicle steering system abnormal sound real-time detection method. A differential mechanism turning abnormal sound detection and avoidance scheme in the prior art has defects and mainly depends on gasket surface treatment, the effect has timeliness, real-time monitoring cannot be achieved, the abnormal sound problem cannot be thoroughly avoided, and long-term noise, vibration, sound vibration roughness performance and driving comfort of a vehicle are affected. The method aims at solving the problems, data preprocessing and feature extraction are carried out by collecting the vehicle running state and acoustic data, and an abnormal sound detection model is constructed and trained based on the processed feature data. By integrating the multi-source sensor data and the advanced machine learning model, the abnormal sound of the vehicle steering system can be accurately detected in real time, the noise, vibration and sound vibration roughness performance and driving comfort of the vehicle are effectively improved, predictive maintenance is supported, and therefore the overall reliability and safety of the vehicle are improved.

The invention relates to the technical field of automobile steering testing, in particular to an automobile steering system testing device which comprises a workbench, one side of the workbench is provided with a conveying piece capable of conveying a tested product, and the conveying piece is located at the position of a middle notch of the workbench; the conveying member is provided with a supporting member which can jack up a tested product. The workbench is provided with two clamping pieces which can clamp a tested product and provide loading force, and the two clamping pieces are symmetrically arranged. The device can simulate the actual performance of a steering system of an automobile under a real load condition; the device can simulate the performance of corresponding real-time torque performance of an automobile under different load working conditions; the device can simulate comprehensive performance such as corresponding real-time noise and vibration of an automobile under different load working conditions; the device can simulate some corresponding detection data real-time transmission and data analysis and adjustment functions under different working conditions.

In various examples, sensor data recorded in the real-world may be leveraged to generate transformed, additional, sensor data to test one or more functions of a vehicle—such as a function of an AEB, CMW, LDW, ALC, or ACC system. Sensor data recorded by the sensors may be augmented, transformed, or otherwise updated to represent sensor data corresponding to state information defined by a simulation test profile for testing the vehicle function(s). Once a set of test data has been generated, the test data may be processed by a system of the vehicle to determine the efficacy of the system with respect to any number of test criteria. As a result, a test set including additional or alternative instances of sensor data may be generated from real-world recorded sensor data to test a vehicle in a variety of test scenarios.

The invention discloses an automobile steering adjustment method. The method comprises the following steps: (1) performing parking and low-speed steering evaluation, and adjusting a power-assisted control module through evaluation; (2) evaluating steering along with the speed, and adjusting the interval of the power-assisted curve at each speed through evaluation; (3) steering along with angles is evaluated, and the increasing slope and the peak value of a power-assisted curve at each speed are adjusted through evaluation; 4) low-speed return evaluation: adjusting return parameters of a return control module at different angles and speeds through evaluation; 5) performing high-speed return evaluation, and adjusting a damping control module through evaluation; and 6) performing comprehensive steering evaluation, and adjusting the dynamic compensation module through evaluation. According to the method, the direction is adjusted according to the curve of assistance, return and damping control, and adjustment is carried out according to steps, so that the ideal curve of assistance, return and damping control is obtained, the objective of subjective evaluation and correction of comfort is met, and the purpose of taking a user as the center is achieved.

The invention relates to a method for detecting chassis defects of a vehicle. The method is characterized in that - chassis noise (FG) and chassis parameters (FP) are determined during different operating conditions of the vehicle, - the determined chassis noises (FG) and chassis parameters (FP) are fed to an artificial neural network (1), which is used in a training (Tr) to generate reference data (RD) with different operating states with a defect-free chassis - recorded tone sequences (T') and sound levels (P') of chassis noise (FG'), - determined chassis parameters (FP') and - recorded noise (SG') was trained, - by means of the artificial neural network (1), a target-actual comparison is carried out between the determined chassis noises (FG) and chassis parameters (FP) and the learned chassis noises (FG') and chassis parameters (FP') and disturbing noises (SG) are continuously compensated using the reference data (RD) and - a chassis defect is detected by means of the artificial neural network (1) if a result of the target / actual comparison exceeds a predetermined threshold value. The invention further relates to a method for operating a vehicle.

The invention discloses a steering motor endurance test method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the working condition information corresponding to a to-be-tested steering motor, and the motor rotating speed information, steering hand torque information and steering force information corresponding to the to-be-tested steering motor under the working condition information; determining torque information of the to-be-tested steering motor under the working condition information based on the steering hand torque information and the steering force information; and based on the torque information, the motor rotating speed information and the working condition information of the to-be-tested steering motor, carrying out an endurance test on the to-be-tested steering motor to obtain a test result. According to the embodiment of the invention, the equivalent endurance test of the steering motor can be realized, and the accuracy and effectiveness of the endurance test of the steering motor are improved.