1107results 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.

An autonomous traverse tire changing bot includes a carriage having a carriage frame with a carriage drive section effecting autonomous traverse of the carriage, along a traverse path, relative to a traverse surface or a floor on which the bot rests, and a bot frame including at least one actuator mounted to the carriage and a bot drive section with a motor defining an actuator degree of freedom, wherein the at least one actuator has an end effector having a tire engagement tool disposed so that articulation of the at least one actuator with the actuator degree of freedom effects engagement contact of the tire engagement tool and a tire mounted on a vehicle, and a controller effects traverse of the bot along the traverse path effecting dynamic positioning of the at least one actuator relative to a variable position of the vehicle with the tire mounted thereon.

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 provides an abnormal sound test bed for a steering pull rod. The abnormal sound test bed comprises a base, a positioning table and an excitation mechanism, the positioning table and the shock excitation mechanism are fixedly connected with the upper side of the base, and the shock excitation mechanism is arranged on the x-direction side edge of the base; the vibration excitation mechanism comprises a fixing frame, a vibration frame, a driving assembly and a plurality of elastic connecting pieces, the driving assembly comprises a transmission end capable of vibrating in the x direction, the transmission end is fixedly connected with the vibration frame, and each elastic connecting piece comprises an elastic piece, a first connecting part and a second connecting part. The first connecting part and the second connecting part are connected with the fixing frame and the vibrating frame respectively and enable the elastic piece to be arranged perpendicular to the x direction, the vibrating frame is provided with an installation base face arranged perpendicular to the x direction, and a butt joint is fixedly connected to the installation base face. According to the invention, the elastic connecting piece is arranged to limit the vibration frame, so that the vibration frame can only vibrate in the x direction, and the accuracy of abnormal sound test is ensured.

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 invention relates to the technical field of automobiles, and discloses a mining area vehicle steering performance detection method and device, and the method comprises the steps: synchronously collecting vehicle end motion state time sequence data and weather time sequence data of a vehicle; constructing a dual-channel CNN, and training a first channel by taking the vehicle end motion state data as an input value and the influence amplitude of the vehicle end motion state on the vehicle steering angle as a label; training a second channel by taking the weather data as an input value and the influence amplitude of weather on the steering angle of the vehicle as a label; generating a fusion matrix; after labeling a label of a steering angle at the next acquisition moment on the fusion matrix, inputting the label into the LSTM for training, and generating a steering angle prediction model; and inputting the vehicle end motion state data and the weather data of the target vehicle into the steering angle prediction model to obtain a target steering angle. The method not only considers the vehicle end motion state characteristic data and combines the weather influence characteristic data to predict the steering angle, and improves the precision of the steering angle.

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 relates to a steering system test bench, a steering system test device and a steering system test method. The steering system test bench comprises a steering gear mounting seat, a first actuator mounting seat, a tubular column mounting seat and a second actuator mounting seat. The steering gear mounting seat is used for mounting a steering gear assembly; the number of the first actuator mounting bases is two, and the two first actuator mounting bases are arranged on the two sides of the steering gear mounting base in the first direction correspondingly. A first actuator is arranged on each first actuator mounting seat, and the first actuators are used for being connected with an outer pull rod of a steering gear assembly mounted on the steering gear mounting seat; the tubular column mounting seat is used for mounting a steering tubular column assembly; a second actuator is arranged on the second actuator mounting seat, and the second actuator is used for being connected with the input end of a steering column assembly mounted on the column mounting seat and used for driving the input end of the steering column assembly to rotate. The steering system test bench can test more items and performance parameters.

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 passenger car electric steering gear rack and gear clearance measurement adjusting mechanism, which comprises a back plate, a telescopic mechanism, an inner displacement detection probe, an outer displacement detection probe, a tightening mechanism and a control unit, and is characterized in that the telescopic mechanism is mounted on the side surface of the back plate, a rotating mechanism is arranged on the side surface of the tightening mechanism, and the telescopic mechanism drives the rotating mechanism to move; according to the invention, dynamic loading and dynamic unloading between the gear and the rack in actual use of the steering gear and the temperature change condition in the steering gear are simulated, so that the gear and the rack with gaps are prevented from deviating in the mounting position under the influence of external factors, and the stability of the gear and the rack is improved. Therefore, the detection precision of the inner displacement detection probe and the outer displacement detection probe is effectively improved, and the accuracy of calculating the gap between the gear and the rack can be further improved.

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.

The invention provides a detection method and device for a steering wheel frame detection assembly line and a readable storage medium, and the method comprises the steps: obtaining multi-modal data of a steering wheel frame at a welding station, including a multi-angle welding part image, distance data between parts, and force change data; after multi-modal data is preprocessed, modal features are extracted through a multi-branch deep learning model, assembly quality classification or regression prediction is carried out through a full connection layer after fusion, and a detection model is trained; a reinforcement learning agent is constructed, assembly line control parameters serve as action space, assembly quality evaluation indexes serve as reward signals, and an optimal control parameter combination is selected according to the multi-modal data and the assembly line state represented by the detection result; a detection result is fed back, related data are stored, and the assembly line control system performs self-adaptive adjustment according to the data. The detection accuracy can be effectively improved, assembly line control is optimized, the assembly quality and production efficiency of the automobile steering wheel frame are improved, and intelligent manufacturing development is promoted.

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.

A first clamping rod and a second clamping rod are arranged on the two sides of a collecting assembly respectively, one end of a supporting assembly is provided with a supporting frame used for supporting a steering gear, and the other end of the supporting assembly is movably connected with a rack so that the supporting assembly can drive the steering gear to abut against the collecting assembly. The acquisition assembly is provided with a vibration sensor, and the force application assembly is provided with a bidirectional rotating motor used for driving an input shaft of the steering gear. The supporting assembly drives the steering gear to move towards the collecting assembly, after the steering gear abuts against the vibration sensor, the first driving piece drives the first clamping rod to abut against one end of a steering gear rotating shaft, the second driving piece drives the second clamping rod to abut against the other end of the steering gear rotating shaft, and the force applying assembly simulates a steering wheel and applies force to an input shaft of the steering gear. And the vibration sensor acquires vibration information of the steering gear, so that whether the steering gear is qualified or not can be tested, and the problem that abnormal sound is brought to the whole vehicle to affect the progress of a project is avoided.

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.

The invention relates to the technical field of dynamic balance testing, and discloses a steering drive axle torque detection testing device which comprises a base, a first motor is fixedly connected to the outer wall of the base, a supporting table is fixedly connected to the surface of the base, a hydraulic cylinder is fixedly connected to the top of the supporting table, and a second motor is fixedly connected to the inner wall of the supporting table. The output end of the second motor is fixedly connected with a detection block, a limiting mechanism is arranged in the supporting table, a positioning groove is formed in the inner wall of the supporting table, a bridge body is placed in the positioning groove, and the detection block is connected with the detection end of the bridge body in a sleeved mode. The drive axle is limited through the anti-deviation mechanism, the drive axle is prevented from deviating due to vibration in the dynamic torque test process, the torque test result is prevented from being affected, the stability of measured data in the torque test process is improved, and the test data can more accurately reflect the real torque performance condition of the drive axle.

A device and a method for detecting an anomaly in a rear-wheel steering motor and a non-transient, computer-readable storage medium that stores a program for carrying out the method are disclosed. The device comprises a memory configured to store one or more instructions and a processor configured to execute one or more instructions.The processor executes one or more instructions to input data relating to the vehicle's rear-wheel steering into an artificial neural network model, to obtain estimated data relating to the vehicle's rear-wheel steering as output data from the artificial neural network model, to obtain measured data relating to the vehicle's rear-wheel steering from a sensor, to compare the estimated data and the measured data, and to detect the rear-wheel steering motor anomaly based on the result of comparing the estimated data and the measured data.

The invention relates to the technical field of automobile testing and evaluation, in particular to a method and device for testing and evaluating the safety of a whole automobile steering function, an automobile and a medium. Obtaining vehicle controllability evaluation, a maximum lateral acceleration value, vehicle lateral displacement in target time, fault takeover time, steering wheel torque, a steering wheel angle and time domain curve and vehicle data information of a yaw angle and time domain curve when the test vehicle fails under the target steering test working condition; and according to a test evaluation criterion corresponding to the target steering test working condition, analyzing the multiple pieces of vehicle data information, thereby generating controllability of the test vehicle under multiple dimensions, and further generating a steering system safety evaluation report of the test vehicle. Therefore, the problems that the error of a test evaluation result is increased while the labor cost is increased and the steering system safety mechanism cannot be efficiently and accurately verified and judged when the safety performance is evaluated manually in the related technology are solved.

The invention relates to the technical field of testing of structural components or equipment, in particular to a working condition durability testing method and device for a wheel hub motor angle module and electronic equipment. The method comprises the steps that a whole vehicle longitudinal dynamics model and a longitudinal dynamic mechanics joint simulation platform of a vehicle are constructed based on whole vehicle parameters of the vehicle carrying a hub motor angle module, then whole vehicle CLTC working condition simulation analysis is conducted on the vehicle, a preset steering test is conducted on the vehicle, a working condition durability vehicle test program is generated based on test data and an analysis result, and the working condition durability vehicle test program is obtained. And designing a tool clamp meeting a preset test condition based on the whole vehicle drum test bench, and constructing a test bench in combination with the whole vehicle drum test bench, so as to perform a working condition durability test of the wheel hub motor angle module by using the test bench. Therefore, the technical problems that the universality of the related technology is poor, the related technology is difficult to adapt to the wheel hub motor angle module with a special structure, and the durability test of the longitudinal force working condition and the lateral force working condition cannot be considered during the durability test are solved.

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.

To obtain a vehicle testing device such as a chassis dynamo meter that can automatically set the position of a roller rotation mechanism so as to prevent the occurrence of tire position deviation phenomenon during execution of a running test.SOLUTION: A control unit 80 receives detection speeds V1 and V2 obtained from rotation detectors 81 and 82, and controls a roller rotation mechanism 3, a position changing mechanism MV, and a front roller 20F to execute rotation center setting processing. In step S6, the rotation center setting processing calculates a plurality of speed differences for determination (sum of speed differences SMV, maximum speed difference MXV, and the like) corresponding to a plurality of set positions based on the speed difference ΔV1 at each of the plurality of set positions, and determines the set position corresponding to the speed difference for determination being the minimum value, of the plurality of speed differences for determination, as the optimal set position. Subsequently, in step S7, the rotation center setting processing moves the roller rotation mechanism 3 to the optimal set position determined in step S6.SELECTED DRAWING: Figure 11

The invention provides an EPS steering test bench. The EPS steering column assembly testing platform solves the problems that an existing traditional testing platform usually tests and records input and output torques of a product, a code scanning gun recognizes a bar code of an EPS steering column assembly, the bar code is collected by a PLC and recorded by an upper computer, data tracing is achieved, the lower end of the EPS steering column assembly is connected with a magnetic powder brake to simulate steering resistance, and the stability of the EPS steering column assembly is improved. The detection efficiency is relatively low; and the detection item is relatively single. The auxiliary frames of different models can be conveniently installed through the adjustable clamping platform, the jacking assemblies and the suspension, independent or simultaneous lifting is achieved through the jacking assemblies symmetrically arranged on the two sides of the installation platform, road condition simulation under different conditions can be achieved, the function design of the real asphalt road condition, the working condition characteristics and the load testing process can be simulated, and the testing efficiency is improved. The device is simple and convenient to use, accurate in control, convenient for data collection and more accurate in test effect.