2681 results about "Steering system" patented technology

An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the roadwheels of a vehicle, a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism, a means for producing a second output signal indicative from a signal indicative of the angular velocity of the portion of the steering mechanism, an electric motor operatively connected to the steering mechanism, a signal processing unit adapted to receive the two output signals and to produce therefrom an overall torque demand signal representative of a torque to be applied to the steering mechanism by the motor, and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal. The overall torque demand signal includes a damping component that is dependent upon the second output signal. The means for producing the yaw damping component includes a filter having one pole and one zero, and in use the second signal is passed through the filter to produce the damping component, the frequency of the pole and zero being selected such that the filter provides a band between the pole and zero within which the phase of the filtered second signal and the velocity signal are further out of phase or in phase than within the band.

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 relates to a vehicle control method and device, electronic equipment, a vehicle and a storage medium, and the method comprises the steps: obtaining the state information of a steering system and a virtual lane in front of the vehicle in response to the detection of a fault of the steering system of the vehicle; determining a risk value function corresponding to the first area based on the state information and the virtual lane; the first area is a predicted collision avoidance area; determining a target acceleration of the vehicle according to the risk value function and the operation parameters of the vehicle; and controlling the vehicle based on the target acceleration. According to the embodiment, the first area is analyzed by combining the state information of the steering system and the virtual lane in front of the vehicle, the risk value function corresponding to the first area is determined, the target acceleration is dynamically adjusted by introducing the risk value function, the safety redundancy requirements under different working conditions can be met, and the safety of the vehicle is improved. And the flexibility and safety of vehicle control are improved.

The application discloses an intelligent electric chassis configuration and a fault-tolerant control method of the intelligent electric chassis, and relates to the technical field of electric chassis. The chassis configuration comprises a front axle centralized motor drive assembly, a rear axle distributed motor drive assembly, a front axle electronic hydraulic brake system, a rear axle electronic mechanical brake system and a chassis domain controller. The front axle centralized motor drive assembly comprises a centralized drive motor, a front wheel speed reducer and a drive half shaft which are sequentially connected. The rear axle distributed motor drive assembly comprises a left rear wheel end drive motor and a left rear wheel speed reducer which are sequentially connected, and a right rear wheel end drive motor and a right rear wheel speed reducer which are sequentially connected. The front axle electronic hydraulic brake system comprises a first main brake unit and a redundant brake unit. The rear axle electronic mechanical brake system comprises a second main brake unit. The chassis domain controller is used for controlling the centralized drive motor, the left and right rear wheel end drive motors, the first main brake unit, the redundant brake unit, the second main brake unit, a front axle steer-by-wire system, an intelligent suspension system and an intelligent tire. The application can improve the chassis safety and fault-tolerant capability to support high-level automatic driving functions.

A catheter steering system wherein the user interface device is a flexible shaft that can be manipulated by hand. The motion imparted on the flexible steering device is reflected in the motion of the catheter tip through an arrangement of pull wires or other mechanisms. Through this arrangement a more intuitive control of the catheter tip is obtained. In an example, a catheter control device includes a catheter port configured to receive the proximal end of a catheter that includes one or more pull wires for attachment to a swashplate, a swashplate, a steering shaft configured to bend in response to a force being applied to the steering shaft; and a mechanism configured to translate the bend of the steering shaft to movement of the swashplate to correspondingly move the distal tip of a catheter coupled to the swashplate.

The invention discloses an automobile driving state blind area monitoring method and a rearview mirror, and relates to the technical field of blind area monitoring. Comprising the following steps of information collection, specifically, sensors and cameras are installed on wheels of an automobile, a steering wheel steering column, an automobile chassis and a steering system respectively, driving state data of the automobile speed, the steering wheel angle, the automobile acceleration and the steering angle and image data around the automobile are collected in real time, and real-time automobile information data are obtained; according to the system, driving state data such as the vehicle speed, the steering wheel angle, the vehicle acceleration and the steering angle are combined, the blind area around the vehicle is monitored in real time through the sensor and the camera, and when the vehicle steers, the blind area monitoring range is adjusted in real time to adapt to the driving direction change; the rearview mirror can display blind area images in real time, the blind area alertness of a driver can be greatly improved, and the traffic accident risk caused by the blind area is effectively reduced.

An electric vehicle and a powertrain for an electric vehicle are disclosed. According to an embodiment, an electric vehicle includes a suspension system, a seat, a steering system, an electric motor and a battery pack. The battery pack includes one or more battery modules to provide power to the electric motor and a battery enclosure housing the one or more battery modules. The battery enclosure is a structural element of the electric vehicle to receive loads from at least two of the suspension system, the seat and the steering system.

The utility model provides a multi-axis shape and position error synchronous measuring device. The multi-axis shape and position error synchronous measuring device comprises a laser module, a light splitting steering system, a two-dimensional position detector A arranged on a sliding block of a first linear guide rail, a two-dimensional position detector B arranged on a sliding block of a second linear guide rail, and a two-dimensional position detector C arranged on a sliding block of a third linear guide rail, initial laser output by the laser module is divided into a first Y-axis collimated light beam, a second Y-axis collimated light beam and a third X-axis collimated light beam through the light splitting steering system, and the first Y-axis collimated light beam, the second Y-axis collimated light beam and the third X-axis collimated light beam enter the two-dimensional position detector A, the two-dimensional position detector B and the two-dimensional position detector C respectively. According to the utility model, multiple form and position errors such as parallelism and verticality between the guide rails can be measured at the same time through one-time measurement, one-by-one measurement is not needed, and the measurement efficiency is greatly improved.

The invention provides a steer-by-wire fault processing method and device based on distributed driving and a vehicle, and relates to the technical field of chassis control, the method can activate a distributed driving system to serve as a cross-system redundant execution unit in an extreme fault scene that a steer-by-wire system is completely invalid and loses steering execution capability, and the steer-by-wire fault processing efficiency is improved. The steering intention of a driver is converted into differential distribution of four-wheel driving torque, so that needed additional yawing torque is generated, the traditional mechanical or electric control steering function is effectively replaced, and active control over vehicle steering is achieved. According to the method, the function safety and controllability of the steer-by-wire vehicle when a key system fails are remarkably improved, the advantage of cooperation of multiple actuators of the electric chassis is fully utilized, high-reliability fault degradation processing is achieved, and the safety of a driver and passengers is guaranteed.

The invention relates to a vehicle active safety control method and system, a storage medium and a vehicle, and belongs to the field of intelligent driving control. The vehicle active safety control method comprises the steps that driving state information is obtained in real time; calculating a longitudinal risk avoidance determination threshold based on the driving state information, and setting a first trigger condition based on the longitudinal risk avoidance determination threshold; if the longitudinal distance between the vehicle and the target vehicle meets the first triggering condition, an automatic emergency braking system is activated, and a first deceleration used for controlling longitudinal braking of the vehicle is generated; after the automatic emergency braking system is activated, a transverse risk avoiding judgment threshold value is calculated on the basis of the driving state information updated in real time, and a second triggering condition is set on the basis of the transverse risk avoiding judgment threshold value; if the longitudinal distance between the vehicle and the target vehicle meets a second triggering condition, an automatic emergency steering system is activated, and a second control instruction is generated; wherein the second control instruction is used for controlling the automatic emergency steering system to execute the cooperative steering angle and controlling the automatic emergency braking system to execute third deceleration cooperating with the cooperative steering angle.

An agricultural steering and navigation system comprising a tactile steering system comprising at least one crop sensor configured to command steering of an agricultural vehicle based upon the location of stalks, a GPS guidance system comprising at least one GPS receiver configured to command steering of the agricultural vehicle along guidance paths, and a processor configured for selectively using either the tactile steering system and the GPS guidance system based on one or more triggers.

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.

A steering assembly comprises: a steering rack configured to be linearly movable; a nut rotatably coupled to the steering rack, wherein the steering rack linearly moves in association with rotation of the nut; a bearing configured to support the rotation of the nut, the bearing comprising an outer race having a flanged part protruding from an outer surface of the outer race of the bearing; and a rack housing accommodating at least a portion of the steering rack, the nut, and the bearing, and having a groove recessed from an inner surface of the rack housing. The flanged part protruding from the outer surface of the outer race of the bearing is disposed in the groove recessed from the inner surface of the rack housing.

The utility model provides a steering structure and an all-terrain vehicle. The steering mechanism is used for connecting a steering wheel and a steering gear of the vehicle and comprises a support, a first shell, an adjusting device, a steering shaft and a power-assisted steering device. The support is used for connecting a vehicle body. The first shell is rotationally connected with the bracket; the adjusting device is connected with the first shell and the support so as to drive the first shell to rotate. One end of the steering shaft is connected with the steering wheel, and the other end is connected with the power-assisted steering device through a universal joint; the power-assisted steering device is connected with a steering gear through a universal joint. The first shell, the adjusting device and the power-assisted steering device in the steering system are integrally installed on the support, so that the situation that the assembly difficulty is large due to the fact that the first shell, the adjusting device and the power-assisted steering device are connected with a vehicle body through other parts is avoided, the number of the parts is reduced, meanwhile, the compactness of the overall structure and the precision control performance of manufacturing and assembly are improved, and the assembly difficulty is reduced; and the installation process with the vehicle body is simplified.

According to several aspects, a method for controlling an electric vehicle is provided. The method may include adjusting an operation of one or more electric motors of the electric vehicle to induce a loss of traction of a first wheel of the electric vehicle on a first side of the electric vehicle. The method further may include adjusting an operation of an electric steering system of the electric vehicle to induce a yaw motion of the electric vehicle. A direction of the yaw motion is away from the first side of the electric vehicle.

The invention relates to a control method and device of a steer-by-wire system, electronic equipment and a storage medium. The control method of the steer-by-wire system comprises the steps that basic feedback torque and road feeling feedback torque are determined according to driving control state data of a vehicle and steering related data of the steer-by-wire system; determining output proportion coefficients corresponding to the basic feedback torque and the road feeling feedback torque according to the driving control state data; and based on the basic feedback torque, the road feeling feedback torque, and the output ratio coefficients corresponding to the basic feedback torque and the road feeling feedback torque, determining a target feedback torque of the up-rotating motor. According to the embodiment of the invention, different output proportion coefficients can be distributed according to the driving control state data as the basic feedback torque and the road feeling feedback torque, and the target feedback torque of the upward-rotating motor is obtained through superposition output, so that a driver can obtain a good steering hand feeling similar to that of a traditional EPS, the vehicle can be flexibly controlled to steer, and the steering efficiency is improved. The change of an actual road surface can be sensed, the risk is pre-judged in advance, and the driving safety is improved.

The invention discloses a hovercar drive-by-wire chassis coordination control system and method, and belongs to the field of vehicle control. The upper layer is a target layer and is responsible for receiving driver intention and current vehicle body state parameters, processing the driver intention and the current vehicle body state parameters, judging current vehicle body postures and providing a basis for follow-up coordination control; the middle layer is a coordination layer and comprises a steer-by-wire system, a driving system, a suspension system controller and a coordination controller, after a control signal from the target layer is received, each subsystem controller firstly controls a corresponding target, and then the coordination controller adjusts each subsystem controller in combination with the vehicle condition; mutual interference is eliminated while efficient operation of the subsystems is guaranteed, and overall optimization of chassis performance is achieved; and the bottom layer is an execution layer which is responsible for executing a control target of the coordination layer, collecting an execution result in real time and feeding back the execution result to the coordination controller to form closed-loop control. According to the invention, the subsystems of the chassis are linked through the coordination controller, so that the comprehensive performance of the flying car during running is improved.

The invention discloses a trajectory planning control method for an automobile automatic driving emergency obstacle avoidance function. The trajectory planning control method comprises the following steps: step 1, planning a plurality of obstacle avoidance planning trajectories under various acceleration and deceleration plans based on obstacle information; 2, stability reduction is carried out on each track in sequence, and an obstacle avoidance planning track meeting stability constraints is obtained; and step 3, performing trajectory tracking control on the vehicle according to the obstacle avoidance planning trajectory which meets the stability constraint and is obtained in the step 2. The method has the advantages that based on the stability condition of tire friction circle calculation, the method is suitable for trajectory planning stability constraint under different acceleration and deceleration plans and stability constraint in the trajectory tracking control process. The AES automatic emergency steering system makes full use of the safety boundary of the vehicle, and the emergency obstacle avoidance capability of the vehicle is improved.

The embodiment of the invention provides a steering-by-wire system feedback control method, device and equipment, a medium and a vehicle, and relates to the technical field of vehicles. The method comprises the steps that in response to received vehicle state parameters, a target torque value output to a steering wheel and a detected actual torque value of the steering wheel are determined; based on the difference value between the actual torque value and the target torque value, deviation torque corresponding to the steering wheel is determined; based on the deviation torque, the actual torque value and the target torque value, a first torque value distributed to the magnetorheological damper and a second torque value distributed to the permanent magnet motor are determined; and on the basis of the first torque value and the second torque value, control signals are output to the magnetorheological damper and the permanent magnet motor correspondingly. According to the method, the problems that in the related technology, power consumption is high during feedback control of the steering-by-wire system, and the overheating risk is likely to exist are effectively solved.

The invention discloses an unmanned mine car front and rear wheel synchronous steering system which comprises a car frame, a front steering axle and a rear steering axle, and the front steering axle and the rear steering axle are installed on a car and control steering through a steering system. The steering system comprises a front axle working cylinder, a front axle driven cylinder, a rear axle working cylinder and a rear axle driven cylinder, the front axle working cylinder and the front axle driven cylinder control front wheels of a vehicle to rotate, the rear axle working cylinder and the rear axle driven cylinder control rear wheels of the vehicle to rotate, and cavities of the front axle working cylinder and the rear axle working cylinder are communicated with a working port A and a working port B of a three-position four-way reversing valve through pipelines respectively. Cavities of the front axle driven cylinder and the rear axle driven cylinder are communicated through a valveless rigid connecting pipeline to form a rigid series oil way, and in the rigid series oil way, the amount of oil discharged by the front wheel working cylinder and the front axle driven cylinder is equal to the amount of oil received by the rear wheel working cylinder and the rear axle driven cylinder. Mechanical hydraulic synchronization of steering angles of front and rear wheels of the vehicle is realized, delay and fault risks of dependence on sensors are eliminated, and high-reliability rigid synchronization is realized.

A vehicle steer-by-wire system includes two front wheels of the vehicle, a steering wheel adapted to receive a steering input, and a steer-by-wire module configured to electronically transmit a steering signal to control a steering orientation of the two front wheels according to the steering input received at the steering wheel, sense a feedback parameter of the two front wheels, and supply a steering feedback signal to the steering wheel according to the sensed feedback parameter of the two front wheels. The system includes one or more vehicle sensors configured to sense at least one operating parameter of the vehicle, and a steering feedback control module configured to receive the at least one operating parameter of the vehicle, determine a driving intensity index according to the at least one operating parameter, and modify the steering feedback signal supplied to the steering wheel according to the determined driving intensity index.

A steer-by-wire system is provided. The steer-by-wire system includes: a first powerpack having a first motor a first controller configured to determine a first mechanical fault of the first powerpack; a second powerpack having a second motor, and a second controller configured to determine a second mechanical fault of the second powerpack; and a steering rack operably coupled to the first motor of the first powerpack and the second motor of the second powerpack, the steering rack being configured to be linearly movable in response to rotation of at least one of the first motor and the second motor.

A tracking and steering system for medical devices comprises a magnetic element attached to a distal portion of the medical device, a sensor on the patient's external surface detecting the magnetic field strength of the medical device's magnetic element, and a steering magnet on the patient's external surface with an electromagnet attracting the medical device's magnetic element. A console with memory and processors receives sensor data to determine the medical device's distal tip position and controls the sensor and steering magnet activation. A display shows an image of the patient with an icon indicating the medical device's location relative to the patient, enhancing medical procedures with real-time tracking and steering capabilities.

The invention discloses a low-temperature friction compensation method and system for an electric power steering system, and the method comprises the steps: obtaining the voltage of a PCB temperature-sensitive resistor in a controller of the electric power steering system when a vehicle is powered on; controlling a motor of the electric power steering system to output a detection signal, and collecting a starting current of the motor under the detection signal; based on the PCB temperature-sensitive resistor voltage, the starting current and a preset offline three-dimensional mapping table, the estimated initial temperature of a steering column of the electric power steering system is determined, then the basic compensation torque of the electric power steering system is determined, the real-time compensation torque of the electric power steering system in the operation process is determined, and torque compensation processing is carried out. The estimated initial temperature of the steering column is accurately calculated through the voltage of the PCB temperature sensitive resistor and the starting current of the motor under the detection signal, low-temperature friction compensation is more accurate, hardware such as a temperature sensor does not need to be additionally added, and therefore the hardware cost and the assembly complexity are prevented from being increased.

A brake system may include a plurality of wheel speed sensors respectively installed in a plurality of wheels of a vehicle, a plurality of hydraulic brake modules related to braking of the plurality of wheels, and a first controller configured to perform braking control on the plurality of hydraulic brake modules in response to at least one of a pedal displacement signal, which corresponds to a movement of a brake pedal, and wheel speed signals outputted from the wheel speed sensors, in which when a failure of the first controller is identified, a second controller, which is provided in a steering system of the vehicle, performs braking control on an electronic parking brake, which is provided in at least one of the plurality of wheels, in response to at least one of an operating signal of an EPB switch, the pedal displacement signal, and the wheel speed signals outputted from the wheel speed sensors.

The invention belongs to the technical field of new energy automobile steering systems, and discloses a new energy automobile electric hydraulic power-assisted steering system and a control method thereof.The system integrates a double-source redundant hydraulic power unit, a hydraulic adjusting unit, a multi-dimensional working condition sensing unit and an intelligent main controller; the multi-dimensional working condition sensing unit is integrated with a road adhesion coefficient detection module and a battery remaining capacity detection module. The control method is layered look-ahead matching control and is executed by an intelligent main controller in parallel: a power-assisted decision-making layer divides a three-stage power-assisted mode according to multi-dimensional perception information, and limits a steering angular velocity when power-assisted is enhanced on a low-attached road surface; the energy optimization layer predicts and implements prospective energy storage and pump rotating speed self-adaptive adjustment based on the intention of a driver; and the fault diagnosis layer realizes rapid fault identification and redundancy switching through multi-parameter collaborative diagnosis. The contradiction of high energy consumption, response delay and weak safety guarantee of a traditional system is solved, and power-assisted steering which is safe, energy-saving, fast in response and high in adaptability is achieved.

A number of illustrative variations may include a system and method of modifying steering wheel effort and end of travel limits dynamically during electronic power steering failure, steer-by-wire failure, or brake-to-steer implementation within a vehicle where steering systems have degraded or failed to provide a driver with a normal or near-normal steering driving experience while brake-to-steer systems are in use.

The invention provides a tail end protection method and device of an electric steering system, a vehicle and a storage medium, the electric steering system comprises a steering wheel, a controller and a power-assisted motor, and the method comprises the steps that the mechanical dead center angle of the electric steering system is obtained; determining a soft dead center angle of the electric steering system according to the mechanical dead center angle, wherein the soft dead center angle is smaller than the mechanical dead center angle; if the current angle of the steering wheel is larger than the soft dead center angle and meets a preset condition, the soft dead center angle is updated, the preset condition is used for representing that the steering wheel rotates to the current angle without misoperation of a user, and the updated soft dead center angle is the current angle. According to the method, the safety angle between the soft stop point and the mechanical stop point is reduced according to the driving behavior of the user in the vehicle driving process based on the soft stop point self-learning function, so that the angle setting of the soft stop point is matched with the driving behavior of the user, and the false triggering of end protection is reduced.

A bearing assembly system for a vehicle steering system includes a tubular member having a radially inwardly protruding shoulder, the tubular member having a stake portion angling radially inwardly, the stake portion having a stake surface. The bearing assembly system also includes a bearing disposed within the tubular member and in contact with the radially inwardly protruding shoulder. The bearing assembly system further includes a retainer disposed within the tubular member and in contact with the bearing, the bearing disposed between the retainer and the radially inwardly protruding shoulder, the retainer having an angled surface, the angled surface in flush contact with the stake surface in a fully assembled condition.

A method to control a steer-by-wire steering system for a road vehicle, the steer-by-wire steering system including a steering, a road wheel actuator to actuate road wheels via a rack, and a controller configured or programmed to include a position controller configured or programmed to calculate, based on an actual rack position and a rack position request, a target rack position for the road wheel actuator, the method including, in response to a requested rack speed being above a predefined maximum value, limiting the requested rack speed to a maximum rack speed value used by the position controller to calculate the target rack position for the road wheel actuator.