958results about "Mechanical steering" patented technology

A system for collaborative steering in steer-by-wire (SBW) vehicles includes sensors, a rack motor altering a position of the vehicle's steerable road wheels and an emulator altering a torque and position of a vehicle hand wheel. A collaborative steering system application (CSSA) obtains, static and dynamic information about the vehicle and the vehicle's environment, and generates a rack torque and / or angle command to the rack motor and an emulator torque and / or angle command to the emulator. The CSSA adjusts between ADAS and manual steering ratios and automatically transitions control between ADAS SBW control and manual control. The CSSA smooths transitions between ADAS SBW control and manual steering control and adjusts hand wheel stiffness by altering the emulator torque command, and causes the rack motor and emulator to operate according to a kinematic model while adapting road wheel response and vehicle operator steering feel based on scenarios and features currently enabled.

A steer by wire includes a steering wheel holding system. An emulator controller receives vehicle data from vehicle systems and determines whether a vehicle is in one of a driving mode and a non-driving mode. When the vehicle is in the driving mode, the emulator controller transmits a command to an emulator switching system to electrically couple the phases of an emulator motor to a power source to enable the emulator motor to implement steer by wire operations placing the steering wheel in an un-hold mode. When the vehicle is in the non-driving mode, the emulator controller transmits a command to the emulator switching system to electrically couple the phases of the emulator motor to ground to short the phases of the emulator motor to ground to generate a resistive torque to resist rotational movement of a steering wheel of the vehicle placing the steering wheel in a hold mode.

Disclosed examples include setting a coupling resistance between a road wheel actuator and a steerable road wheel of a vehicle at a first time by controlling an electrical damping device to increase an electrical resistance of an electric motor of the road wheel actuator; and changing the coupling resistance between the road wheel actuator and the steerable road wheel at a second time by controlling the electrical damping device to further increase the electrical resistance of the electric motor of the road wheel actuator.

A steer-by-wire system for a vehicle includes a rack moveable in an axial direction and defining a groove extending in the axial direction of the rack. The system also includes a housing surrounding at least a portion of the rack. The system further includes an anti-rotation device disposed proximate an outer surface of the rack at the mounting location of the rack and within the housing, the anti-rotation device comprising a bearing seated within the groove of the rack. The system yet further includes a delash bearing assembly in contact with the rack to radially bias the rack to a desired position.

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 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.

A steering reaction force control device, a steering reaction force control method, and a steering reaction force control system according to the present invention determine an amount of torque of a steering reaction force imparted by the reaction force actuator and a direction of torque for returning the steering operation input member to a neutral position from a physical quantity related to a vehicle speed of the vehicle and a physical quantity related to the operation information of the steering operation input member, and output a control signal based on the amount of torque and the direction of torque to the reaction force actuator. As a result, it is possible to prevent the hunting of the operating position of the steering operation input member when the steering operation input member is retained in a given steering position.

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 means of transport, a steer-by-wire steering system (10), and a method for establishing a geometric zero position of a steering wheel (7) with an imbalance in a steer-by-wire steering system (10) are proposed. The method comprises the following steps: automatically rotating the steering wheel (7) by a motor through a first angular range (a) in a first direction, automatically determining a first force acting on the steering wheel (7) during rotation through the first angular range (a), automatically determining a first relationship between the first force acting over the first angular range (a), and automatically establishing the geometric zero position depending on the first relationship.

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 steering feedback unit detects a steering torque generated according to an operation of a steering wheel, a road-wheel steering unit connected to the steering feedback unit to allow a steering of a wheel to be performed according to a steering angle or the steering torque transmitted from the steering feedback unit, and a control unit determines the steering torque detected in the steering feedback unit as a steering angle selectively according to a preset standard vehicle speed and standard steering speed to transmit the determined steering angle to the road-wheel steering unit, and controls the steering of the wheel according to the steering angle to be performed, or transmits the steering torque detected in the steering feedback unit to the road-wheel steering unit and control the amount of motor torque for the steering of the wheel to be determined.

A vehicle control system for a vehicle with steer-by-wire steering may include a road wheel actuator operably coupled to a road wheel of the vehicle to position the road wheel based to a road wheel angle based on a target angle, a feedback actuator operably coupled to a steering wheel of the vehicle to generate the target angle based on a steering wheel angle and to generate feedback to an operator of the vehicle, a sensor network comprising sensors to detect the steering wheel angle and the road wheel angle, a display disposed in the vehicle to be visible to the operator of the vehicle during vehicle operation, and a controller for determining when a misalignment exists between the road wheel angle and the steering wheel angle and providing a visual indication of the misalignment on the display.

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.

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.

A vehicle system includes a road wheel system having a road wheel actuator and at least one pinion angle sensor, and a control module. The control module is configured to receive a road wheel actuator command and a rack force, generate a model of the road wheel system based on the road wheel actuator command and the rack force, estimate, with a state observer, a steering pinion angle based on the generated model, the road wheel actuator command and the rack force, determine a validity of a steering pinion angle measured by the at least one pinion angle sensor based on the estimated steering pinion angle and a threshold, and in response to determining that the measured steering pinion angle is invalid, control a steering function of the vehicle based on the estimated steering pinion angle.

A steering rod for a steer-by-wire steering system is disclosed. The steering rod is designed to move in the axial direction over a distance S. The steering rod includes a first target lane with first conductive segments. Gaps exist between the first segments such that the first segments and gaps form a first pattern along the first target lane which repeats itself with a first period length p1. The steering rod includes a second target lane with second conductive segments. Gaps exist between the second segments such that the second segments and gaps along the second target lane form a second pattern that repeats with a second period length p2. The period lengths p1 and p2 are selected such that the least common multiple of the period lengths p1 and p2 is greater than or equal to the distance S.

The present invention relates to a transmission device for a steering system. The steering system includes a transmission unit with a rotatable first gear element, which may be driven by a drive. The steering system also includes a rotatable second gear element, which is operatively connected to the first gear element for transmitting the drive movement as a function of a transmission ratio between the first and second gear elements. A monitoring unit is further included for monitoring the transmission unit with a detection means for detecting an actuated rotational position of the transmission unit when transmitting the drive movement within a predefined rotational range. The invention also relates to a steering system, a method, and a computer program product.

A steering feedback actuator includes a housing part (100), a steering column (200) rotatably accommodated within the housing part (100) and arranged in a first direction, a first gear part (300) coupled to the steering column (200) so as to rotate with the steering column (200), and an electric motor part (400) including a motor housing (410) coupled to the housing part (100) to cover an opening (100a) of the housing part (100), and a motor shaft (420) rotatably coupled to the motor housing (410) and having a second gear part (421) engaged with the first gear part (300).

A method for power saving in a steering system of a motor vehicle including a road wheel actuator acting on a rack to turn steerable road wheels and a controller configured or programmed to generate an operation signal for the road wheel actuator, wherein the controller includes a position controller to generate a motor torque request based on an actual and / or a measured position of the rack and a requested rack position, includes detecting a passive mode of the steering system by a passive mode detector of the controller if the motor vehicle is stopped and no steering input is provided, and if a passive mode is detected by the passive mode detector, setting the motor torque request to zero in order to save power.

In a reaction torque calculation process, an electronic control unit included in a steer-by-wire steering device is configured to calculate a distributed axial force obtained by distributing an angle axial force and an electric current axial force based on a final distribution ratio. The reaction torque calculation process includes at least one of a first abnormal-time process and a second abnormal-time process. The first abnormal-time process is executed to hold, for calculation of the angle axial force, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal. The second abnormal-time process is executed to hold, for calculation of a normal-time distribution ratio, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal or hold a value of the normal-time distribution ratio immediately before the vehicle speed signal becomes abnormal, and then gradually change the final distribution ratio to an abnormal-time distribution ratio.

This application relates generally to a procedure for operating a vehicle with an electronic steering system. A method for operating a vehicle with an electronic steering system includes controlling a road wheel actuator based on a detected steering wheel angle of a steering wheel operably coupled to a steering wheel actuator so that a steerable road wheel assumes a road wheel angle defined by the detected steering wheel angle in accordance with a transfer function, wherein the transfer function describes a dependence of the road wheel angle to the detected steering wheel angle, detecting a self-steering fault of the steering wheel actuator, and based on the detected self-steering fault estimating a steering wheel angle error, and triggering at least one compensatory measure, so that a road wheel angle error is at least reduced.

A vehicle steering control system including a road wheel angle sensor for detecting a road wheel angle, a steering feedback motor for rotating a steering wheel in response to the road wheel angle and for generating a steering torque value in response to a physical rotation of the steering wheel by a vehicle driver, a processor for receiving the road wheel angle and the steering torque value, for estimating a steering wheel angle in response to the steering torque value and for generating a validated steering angle in response to a difference between the road wheel angle and the steering wheel angle being less than a threshold value, and a steering controller for controlling the steering of a vehicle in response to the validated steering angle.

The application discloses a kind of drive-by-wire steering control method, device and electronic equipment, it is related to intelligent automobile field.The method comprises: obtaining the steering parameter of vehicle, wherein the steering parameter is the steering transmission ratio between steering wheel and tire;According to the steering parameter of vehicle, the steering signal of steering wheel is converted into the desired steering angle of vehicle;Based on the desired steering angle, the desired wheel speed of each wheel of vehicle is calculated, and the wheel speed control is carried out to each wheel of vehicle according to the desired wheel speed of each wheel.Based on the above method, the desired wheel speed of each wheel of vehicle is realized by calculation desired steering angle, and the wheel speed of each wheel of vehicle is further adjusted according to the desired wheel speed of each wheel of vehicle, so as to realize the drive-by-wire steering based on wheel speed control, to ensure that backup steering system can realize the steering control of vehicle when main steering system fails.

The invention relates to a device for adjusting the steering feedback, in particular of a vehicle, a steer-by-wire steering system, and a means of transportation. The device comprises a magnetrheological powder brake acting on a rotational movement of a steering device, a magnetic field generation device configured to generate a total magnetic field acting on the magnetrheological powder brake, and a control device connected to the magnetic field generation device for the exchange of electrical energy, wherein the control device is further connected to at least one sensor data exchange unit.wherein the magnetic field generating device comprises a first coil inducing a first magnetic field and a second coil inducing a second magnetic field, and the control device excites the first coil and / or the second coil, depending on a current driving situation determined by the at least one detection unit, to generate the respective first magnetic field and / or second magnetic field, wherein the first magnetic field and the second magnetic field interact to form the overall magnetic field, such that the steering feedback is adjusted by means of the overall magnetic field acting on the magnetrheological powder brake.

A rotation stop device for a rotatably mounted shaft, having a stationary stop body and a transmission which converts the rotational movement of the shaft into a linear movement of a driven element relative to the stop body, and having a stop element which can be moved by the driven element into a stop position in which it bears against the stop body. The stop element is coupled to the shaft in a rotationally fixed and axially displaceable manner by a linear guide.

The invention discloses a drive-by-wire hydraulic steering system and method based on linear active disturbance rejection, and belongs to the technical field of automobile steering, the steering system comprises a hydraulic control unit and a control module, the hydraulic control unit is used for controlling the movement direction and the movement speed of a steering oil cylinder by controlling the flowing direction and the flowing speed of hydraulic oil; and the control module is used for calculating the received input turning angle and the actual turning angle according to a linear active-disturbance-rejection steering angle control algorithm, controlling the steering of a steering control valve in the hydraulic control unit, and indirectly controlling the steering angle and the motion trail of the vehicle through the steering of the steering control valve. By means of the steering system and method, the problems of non-linear interference such as uncertainty of tire aligning torque influence factors and electromagnetic coupling of a steering execution motor can be effectively solved, high-precision steering angle tracking control is achieved, the steering precision and the response speed of a vehicle are remarkably improved, and the maneuverability and the sense of safety of a driver are improved.

The present disclosure provides a vehicle and a control method, a control apparatus, and a storage medium thereof. The method includes: obtaining a wheel speed difference at a current vehicle speed when it is determined that a steer-by-wire system of the vehicle is failed; obtaining a positive kingpin offset value; and determining, based on the wheel speed difference and the positive kingpin offset value, a target steering angle of a vehicle wheel, and controlling the vehicle wheel based on the target steering angle. The method provided in the present disclosure can enables steering control of the vehicle based on the wheel speed difference and a positive kingpin offset when the steer-by-wire system fails, and no additional components are required. In this way, an off-system backup for the failed steer-by-wire system is achieved, improving vehicle safety and reducing costs.

An agricultural vehicle includes a steering input device configured to steer the agricultural vehicle to perform a turn. The agricultural vehicle includes a steering control system configured to operate the steering input device. The steering control system includes processing circuitry. The processing circuitry is configured to receive a steering input indicating a curvature to be performed by the agricultural vehicle. The processing circuitry is configured to operate the steering input device using a primary curvature model of the agricultural vehicle and the steering input. The primary curvature model of the agricultural vehicle is configured to predict a steering condition of the steering input device to perform the steering input. The primary curvature model comprising a non-linear relationship between curvatures and steering conditions of the steering input device.

The application provides a steering mode switching method and device, a vehicle and a storage medium. The vehicle is independently controlled by an electronic mechanical braking system for each wheel. The method is applied to the technical field of the vehicle. The method comprises the following steps: determining whether the expected steering mode of a user obtained and the current steering mode of the vehicle are the same. When the current steering mode and the expected steering mode are different, the current vehicle speed and the current wheel speed of each wheel are obtained. Then, it is determined whether the vehicle meets the steering switching condition. When the vehicle meets the steering switching condition, the vehicle is switched from the current steering mode to the expected steering mode by the braking force of the obtained multiple wheels of the vehicle. The method can make the vehicle switch from any steering mode to the expected mode required by the user when the switching condition is met, thereby effectively reducing the steering operation burden of the user, improving the stability of the vehicle steering and the driving experience of the user.

The present embodiments provide a steering feedback actuator including a housing to which a steering shaft is rotatably coupled, a reaction motor coupled to the housing and connected to the steering shaft to provide a steering reaction force, a rotor coupled to the steering shaft, and a clutch unit including a stopper fixed to the housing, and optionally restraining the rotor to the stopper.