290results about "Vehicle steering/rolling behaviour" patented technology

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 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 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.

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.

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 provides a steer-by-wire system fault injection device and a testing method, and belongs to the technical field of steer-by-wire system testing, and the steer-by-wire system fault injection device comprises a power supply fault injection module which comprises a plurality of power supply fault injection units which are respectively connected with a multi-redundancy steer-by-wire system so as to provide power supply fault injection; the communication fault injection module comprises a plurality of communication fault injection units which are respectively used for being connected with the multi-redundancy steer-by-wire system so as to provide communication fault injection; the steering sensor fault injection module comprises a plurality of sensor fault injection units which are respectively used for being connected with the multi-redundancy steer-by-wire system so as to provide steering sensor fault injection; and the control chip is used for controlling the actions of each power supply fault injection unit, each communication fault injection unit and each sensor fault injection unit. The method can be suitable for a redundant system, can cover most fault types of the SBW system, can simulate combined faults, and has expansibility.

The application relates to a vehicle axle steering mechanism test device, which comprises a vertical loading module of a to-be-tested vehicle axle, a steering driving module, and a torque loading module. The vertical loading module is arranged on the to-be-tested vehicle axle and is used for applying a vertical load to the to-be-tested vehicle axle. The output end of the steering driving module is connected with a steering knuckle arm of the to-be-tested vehicle axle and is used for driving the to-be-tested vehicle axle to perform a steering action. The torque loading module is respectively connected with two wheel edge output ends of the to-be-tested vehicle axle and comprises a universal connecting unit and a torque loading unit. The universal connecting unit is used for providing multi-degree-of-freedom constraint. The torque loading unit is used for loading torque. The application innovatively constructs a highly integrated, multi-axis linkage comprehensive test bench. The modules can effectively simulate the actual stress of the vehicle axle when the vehicle turns or goes uphill during testing through mutual cooperation, effectively solve the problem that the existing test bench has single function and cannot simulate a composite working condition, improve the efficiency and convenience of performance and durability testing, and fill the industry gap.

This application provides a method, system, equipment, and medium for evaluating the first-order ride comfort of a vehicle, belonging to the field of vehicle engineering and testing technology. The evaluation method includes: acquiring gyroscope signals and triaxial vibration acceleration signals at each measuring point of the vehicle at at least two vehicle speeds on various test roads, including at least long-wave impact surfaces and short-wave disturbance surfaces; processing the gyroscope signals to obtain attitude evaluation parameters characterizing the amplitude of the vehicle's first-order motion; performing frequency domain analysis on the triaxial vibration acceleration signals to obtain vibration evaluation parameters characterizing the abruptness of the vehicle's first-order motion; and evaluating the first-order ride comfort of the vehicle based on the attitude evaluation parameters and vibration evaluation parameters to obtain the evaluation results. This application achieves the separation and quantification of the amplitude and texture of the vehicle's first-order rigid body motions such as pitch, roll, and vertical sway, providing comprehensive and accurate evaluation results that effectively support subjective evaluation and chassis tuning.

The invention belongs to the field of shaft testing, and particularly relates to automobile transmission shaft assembly torsional fatigue testing equipment which comprises a testing seat, a driving table used for controlling a to-be-tested shaft to rotate is arranged in the middle of the testing seat, and a moving table connected with the to-be-tested shaft is arranged on the top face of the testing seat. The movable table can change the resistance between the movable table and the test seat, a center seat is arranged in the middle of the test seat, an adjusting column is fixedly connected to the top of the center seat, and multiple monitoring modules used for monitoring fatigue data of a to-be-tested shaft are arranged in the test seat. The real bending moment and radial force brought by revolution are closer to the real stress state of wheel rolling, so that the authenticity of detection data is improved; meanwhile, due to scene simulation during detection, multiple detection data indexes are added, more detection data can be obtained, and a more accurate measurement result can be obtained through the data.

A method for automated chassis measurement of a motor vehicle (6) capable of at least partially autonomous driving, wherein the chassis measurement method comprises transmitting commands to the motor vehicle (6), in particular to a control unit (9) in the motor vehicle (6), which cause the motor vehicle (6) to independently make changes to the axle geometry of the motor vehicle (6), in particular steering angles, in order to successively bring the axle geometry of the motor vehicle (6) into different states; and measuring the axle geometry of the motor vehicle (6) in the different states.

The invention relates to the field of abnormal sound testing, discloses a test bed and a test method for Rattle abnormal sound testing of a steering column, and aims at solving the industry blank that a steering engine assembly needs to be assembled, linear excitation is adopted, and the steering column cannot be independently and accurately tested in the existing test. And the driving seat which can slide front, back, left and right and can adjust the inclination angle is matched, so that independent installation and accurate positioning of the steering column single bodies are realized, and butt joint can be completed without depending on a steering machine. The driving part output shaft directly transmits instantaneous torque impact, the road bumping working condition is accurately simulated, traditional linear excitation is replaced, the blank of industry special tests is filled up, the test pertinence and authenticity are improved, meanwhile, steering columns of different specifications are adapted, and the universality is high.

The application discloses a kind of automobile steering mechanism collision test clamping devices, belong to automobile steering mechanism production processing field.Worker presses pressing piece from outside to inside, pressing piece is pushed to pressure-bearing cylinder inside, so that pressure-bearing ball is pressed to the side end surface of main bearing hole, to impact collision to the side end surface of main bearing hole, detect main bearing hole after being impacted, pressing piece under extrusion will its inner cavity pre-stored gas be injected to the side of main bearing hole by permeable cavity, to the main bearing hole for injection treatment, to simulate the use of knuckle under strong wind environment, the outer surface of steering gear is contacted by the outer end surface of polishing ball, the outer surface of steering gear is contacted with polishing ball, when the whole device moves or swings, polishing ball continuously impacts the outer surface of steering gear, can simulate the use effect of steering gear under strong impact, whether reach its expected durability fatigue degree, and the connecting part of steering gear is clamped.

The invention relates to a method (100) for commissioning a vehicle (10) that can be operated at least partially automatically, comprising: sending (101) at least one reference command (201) to a control unit (11) of the vehicle (10) to trigger the execution of an automated reference action (200) of the vehicle (10) based on the reference command (201), and recording (102) the vehicle behavior (210) of the vehicle (10) during the execution of the reference action (200). The invention further relates to a computer program product, a manufacturing method (300), and a system (1).

The embodiment of the invention provides a noise evaluation method for a steering system, a vehicle and a storage medium, and the method comprises the steps: obtaining a vibration signal of the steering system in a vehicle steering process; analyzing the vibration signal to obtain vibration data corresponding to noise generated by the steering system and acoustic characteristics of the noise; determining a sound pressure level of the steering system based on the vibration data and a preset mapping relation; and evaluating the noise based on the sound pressure level and the acoustic characteristics to obtain a noise evaluation index. The technical problem that the accuracy of abnormal sound detection of the steering system is low in the prior art is solved.

The present application relates to the technical field of steering system, and particularly relates to a large-torque running-in equipment. The large-torque running-in equipment comprises a rack, a tray conveying and positioning module, a shell positioning module, a gear adjusting module, a taking and placing module, a toothed hub adjusting module and a screw adjusting module. The rack is connected with the gear adjusting module. The top of the gear adjusting module is connected with the shell positioning module. The toothed hub adjusting module is arranged on the left and right sides of the shell positioning module. The tray conveying and positioning module is arranged on the front side of the shell positioning module. The screw adjusting module is arranged on the rear side of the shell positioning module. The taking and placing module is connected with the rack on the side of the tray conveying and positioning module. Compared with the prior art, the large-torque running-in equipment is provided, a general processing equipment is designed, the processing requirements of four types of shell assemblies can be met through simple modification, the design structure is stable, the space utilization rate is high, the compatibility is strong, and the rapid import of different design products can be met.

The utility model discloses a novel commercial vehicle electric power steering gear test bench, which is characterized in that the novel commercial vehicle electric power steering gear test bench comprises a servo motor assembly, a torque transmission assembly and a mechanical support assembly, the servo motor assembly comprises a servo motor and a multi-stage speed reducer, and an output shaft of the servo motor is connected with an input end of the multi-stage speed reducer through a coupler; the torque transmission assembly comprises a tested electric power steering gear mounting bracket and an output shaft connecting flange, and the output end of the multi-stage speed reducer is connected with an output shaft of the tested electric power steering gear through the output shaft connecting flange; the mechanical supporting assembly comprises a base frame, a damping device and an adjustable steering wheel support, the servo motor assembly, the tested electric power steering gear installation support and the adjustable steering wheel support are fixed to the base frame, and the damping device is arranged at the bottom of the base frame.

The utility model relates to the technical field of automobile detection tools, and discloses an automobile steering wheel skeleton detection tool, which comprises a base, a main body detection assembly, a positioning detection assembly and a pressing assembly, and is characterized in that the main body detection assembly further comprises a base arranged at the top of the base; the output end of the synchronous motor drives one group of synchronous gears to drive the gear ring, the gear ring synchronously drives the other groups of synchronous gears, and the second bevel gears at the tops of the synchronous gears can synchronously drive the corresponding first bevel gears, so that a plurality of groups of ball screws on the circumference of the top surface of the base can synchronously rotate; the bases in the main body detection assemblies which are circumferentially arranged at equal intervals can be synchronously adjusted on the base, so that the device can be suitable for detection of steering wheels with different diameters at the top of the base.

The utility model provides a multifunctional detection line for an automobile steering knuckle. The multifunctional detection line comprises a base plate; the detection table is fixedly connected to the top of the bottom plate, an adjusting frame is installed at the top of the detection table, a first driving assembly is installed on one side of the adjusting frame, a reciprocating lead screw is rotationally connected into the adjusting frame, and sliding rods are installed at the positions, close to the front face and the back face, of the interior of the adjusting frame; an internal thread frame is mounted on the outer surfaces of the reciprocating lead screw and the sliding rod, a mounting frame is mounted at the top of the internal thread frame, and an electromagnet and four stabilizing bolts are mounted at the bottom of the inner wall of the mounting frame. Through the design, a plurality of detection devices are utilized to form a multifunctional detection line, a movable structure is matched to drive the steering knuckle to move slowly to assist in detection, and the multifunctional detection efficiency of the automobile steering knuckle is improved.

The utility model relates to the technical field of steering gears, in particular to a rotary steering gear loading mechanism which comprises a guide rail, a foundation platform slidably connected to the upper end of the guide rail, a hand wheel assembly arranged in the middle of the guide rail and connected with the foundation platform, and a rotary motor and a gear reducer fixedly connected to the left side of the upper end of the foundation platform. The gear reducer is located at the power output end of the rotating motor, the power output end of the rotating motor is connected with the input end of the gear reducer, the output end of the gear reducer is connected with a coupler, the front end of the coupler is fixedly connected with a fixing shaft, two supporting tables are arranged in the middle of the fixing shaft, and a swing arm is arranged between the two supporting tables. The swing arm is fixedly connected with the fixed shaft, the protective ring is embedded in the middle of the swing arm, the connecting shaft is arranged in the middle of the protective ring, the fixed ring is fixedly connected with the middle of the connecting shaft, the torque is directly borne by the rotating motor, other modules except a steering gear loading system do not need to be changed, and the reliability of the system is greatly improved.

The invention belongs to the technical field of automobile steering gear production, and particularly discloses an airtightness detection device which comprises a bottom box, the upper end of the bottom box is connected with a protection frame and a workbench, the middle of the upper end of the workbench is connected with a supporting and placing mechanism, and the upper end of the supporting and placing mechanism is connected with a steering gear workpiece in a supporting and placing mode. The outer walls of the two ends of the steering gear workpiece are connected with the fixing mechanisms correspondingly, the supporting and placing mechanism comprises a supporting table, the upper end of the supporting table is connected with an arc-shaped plate, the upper end of the arc-shaped plate is slidably connected with a sliding block, and the upper end of the sliding block is connected with a supporting block. Combined type flexible clamping of the two ends of the workpiece is provided through the fixing mechanism, automatic cleaning of the end face of the workpiece and synchronous recycling of chippings are completed through the cleaning mechanism, and the accuracy and reliability of airtightness detection are guaranteed.

The utility model provides an automobile multi-parameter integrated detection device, which relates to the field of integrated detection and comprises a base, the top of the base is fixedly connected with a plurality of groups of first supporting columns, the top of each group of first supporting columns is fixedly connected with a rotating bent plate, and the opposite side surfaces of the rotating bent plates are fixedly connected with a plurality of groups of shaft seats. According to the device, through cooperation of the limiting sleeve, the tooth column, the electric push rod, the transmission shaft, the gear and other components, the height of the rotating bent plate and the height of the detection instrument can be conveniently adjusted so as to adapt to the size difference of different vehicle types, especially the situation of different vehicle heights; the detection instrument can be close to or far away from the tire more accurately for abrasion detection, the angle can be flexibly adjusted to be aligned with the vehicle lamp for detection, the defect that an existing detection device is not flexible enough in detection position adjustment is overcome, and the adaptability of the device to various vehicle types is improved.

The utility model relates to the technical field of brake steering, in particular to a blank detection tool. The blank detection tool comprises a positioning pin used for supporting a blank product to be detected; the abutting rod body is located above the positioning pin, the abutting rod body descends and can abut against the top end of the positioning pin, when a blank product is placed on the positioning pin, the abutting rod body presses the blank product on the positioning pin, and the abutting rod body abuts against the top end of the positioning pin when the blank product is placed on the positioning pin. The top end of the positioning pin and the top end of the abutting rod body are located on the two sides of the blank product respectively, the blank product can be stably positioned through the blank detection tool, the blank product can be accurately detected, and the detection accuracy is improved.

The utility model discloses a motorcycle handlebar automatic steering experiment device, which comprises an air compressor, an air source processor, a microcomputer processor and an electromagnetic valve, the input end of the air source processor is connected with the air compressor, the output end of the air source processor is connected with the electromagnetic valve, the electromagnetic valve is connected with a moving mechanism, and the microcomputer processor is electrically connected with the electromagnetic valve. The motorcycle handlebar is driven to steer through the moving mechanism, an operator does not need to steer manually, the labor intensity of the operator is reduced, and the physical and psychological health of the operator is facilitated.

This invention relates to the field of automotive parts technology, and provides a CCB steering column mounting bracket mechanical characteristic simulation test platform. The platform uses side and center brackets to mount the steering column mounting bracket. A laser sensor is mounted on an inclined support frame of the simulation test mechanism. The simulation mechanism simulates applying torque in conjunction with the steering column mounting bracket, and the laser sensor detects the displacement of the steering column mounting bracket. The simulation mechanism can also repeatedly apply torque to monitor and determine whether there are any abnormal noises in the CCB steering column area, thereby conducting a simulated stress test on the steering column mounting bracket. This allows for the determination of whether the welding strength of the CCB steering column mounting bracket is problematic, whether the bracket is qualified, and whether there are any abnormal noises under torque conditions.

The application discloses a vehicle steering center area test data processing method, device and equipment, which comprises the following steps: firstly, arranging target vehicle steering center area test data according to a preset channel and a preset format to obtain arranged data, and then automatically extracting the arranged data according to the preset channel and the preset format; secondly, performing Kalman filtering on the extracted data to obtain filtered data, and when the filtered data is determined to be reasonable data, performing periodic data interception on the filtered data, and dividing the intercepted data segment into left steering segmented data and right steering segmented data according to the positions of wave crests and wave troughs; then, the segmented data can be fitted by a six-level Fourier series, and the derivative and gradient curve are calculated, and relevant index parameter fitting calculation is performed to obtain a data processing result. Thus, the problems of low processing precision, multiple parameters and complex processing of target vehicle steering center area test data are solved.

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.

A load stabilizer and a fatigue bench test system, the load stabilizer comprising a cylinder, a first end cover and a second end cover threadedly connected to two ends of the cylinder, an installation seat with a guide rod and a spring sleeved on the guide rod being arranged between the first end cover and the second end cover in the cylinder, a bushing being mounted in a bore of the second end cover, the guide rod extending out of the bushing and being provided with an external thread at an end portion, a nut being mounted on the external thread, and an outer diameter of a gasket between the nut and the second end cover being greater than an outer diameter of the bushing. The fatigue bench test system has a vertical loading point, a reciprocating fatigue load connecting point, and the load stabilizer described above, the load stabilizer being connected with a joint bearing of the vertical loading point via a threaded bore of the first end cover, and being connected with one end of a connecting rod provided with an internal thread via the thread of the end portion of the guide rod, the other end of the connecting rod being connected with a force sensor. The load stabilizer is small and moderate, convenient to install and disassemble, and two load stabilizers can be used in series to obtain smaller load deviation.

The invention provides a steering gear three-axis test bench which comprises a bench main body, a driving seat driven by a driving motor to rotate and a mounting mechanism for mounting a steering gear are arranged on the bench main body, and the steering gear three-axis test bench further comprises two groups of connecting wheels which are rotatably arranged on the bench main body and can slide along the axis of the connecting wheels. A connecting seat connected with the output end of the steering gear is rotatably arranged on one side of the connecting wheel, a loading mechanism is arranged on the rack body, a driving shaft is rotatably arranged at the bottom of the rack body, the driving shaft is connected with the driving seat through a clutch linkage mechanism, hollow testing wheels are arranged at the two ends of the driving shaft, and the testing wheels abut against the connecting wheel. A plurality of groups of convex blocks are annularly arranged on the testing wheel, and an adjusting assembly connected with the plurality of groups of convex blocks is arranged on the testing wheel. The device can simulate the use state of the steering gear on a bumpy road surface, can simulate road surfaces with different bumpy degrees, applies complex and changeable dynamic loads to the steering gear, and improves the diversity and reliability of test data.

A method for tuning a calibration table for an electric power steering system involves connecting the electric power steering system to an actuator machine and communicating a control input from a vehicle simulator to the actuator machine. Input forces and steering angles are applied to the electric power steering system by the actuator machine, based on the control input. The electric power steering system is controlled by a steering controller to input a steering input, i.e., an assist torque. The steering controller uses the calibration table to define the steering input, based on the applied input forces and steering angles. A steering torque generated in the electric power steering system in response to the input steering input is detected and communicated to the vehicle control system, thereby establishing a closed control loop and feedback.The calibration table can then be redefined to set a steering target value based on the detected steering response for the applied input forces.