A method for piloting a motor of a power steering system of a vehicle, the power steering system having at least one steering wheel and one rack, the motor being piloted by a closed-loop proportional-derivative regulator (R.sub.θ) receiving as input an angular position (θm) of the motor and a setpoint angle (θ.sub.c), the regulator (R.sub.θ) determining a setpoint motor torque (C.sub.c). The method

includes the steps of determining a stiffness compensation, and

modifying the angular position (θ.sub.m) of the motor.

Disclosed are an apparatus and a method for controlling an operation of a reaction force motor. An exemplary embodiment of the present disclosure provides an apparatus for controlling an operation of a reaction force motor, which is included in a system for providing a reaction force by using the reaction force motor and an elastic member which is deformed by a rotation of a steering wheel in a direction of a rotation axis of the steering wheel, the apparatus including: a first motor control unit connected to a first winding part of the reaction force motor; and a second motor control unit connected to a second winding part of the reaction force motor, in which the first and second motor control units control turning-on or turning-off of switches included therein so that the reaction force motor generates braking torque corresponding to reaction force torque provided by the elastic member, a steering angle of the steering wheel, and steering torque of the steering wheel.

A steering wheel assembly includes a steer-by-wire steering wheel and a central axis about which the steering wheel rotates to control the direction of travel of a motor vehicle. The steering wheel assembly also includes (a) a support arm, the steering wheel being coupled to a first end of the support arm so as to permit rotation of the steering wheel about the central axis of the steering wheel and (b) an interior trim portion, wherein the second end of the support arm is slidably coupled to a track of the interior trim portion. The track is configured such that the steering wheel is movable relative to the interior trim portion from a first deployed position in which a first occupant of the vehicle steers the steering wheel to a position away from the first deployed position.

A vehicle steering device includes: steering reaction force generation device having a steering wheel and a steering reaction force motor; steering reaction force motor resolver for detecting steering angle; turning device having a steering motor and capable of turning steered wheels, in a state being mechanically disconnected from the steering reaction force generation device; steering motor resolver for detecting turning angle; drive control section for performing drive control of the steering motor; and vehicle speed sensor for detecting the vehicle speed of vehicle. The drive control section performs drive control of the steering motor if vehicle speed exceeds vehicle speed threshold for the first time after ignition switch is turned on and if specific phase shift based on type and magnitude of phase shift occurs.

Machine-learning-based steering torque non-uniformity compensation for vehicles is enabled. For example, a system can comprise a memory that stores computer executable components, and a processor that executes the computer executable components stored in the memory, wherein the computer executable components comprise: a machine learning component that generates a steering non-uniformity model based on machine learning applied to past steering data representative of positions and steering ratios of a steering wheel of a vehicle, and a torque compensation component that, using current position data representative of a current position of the steering wheel and the steering non-uniformity model, determines a torque to apply to the steering wheel configured to offset a steering non-uniformity at the current position.

A steer-by-wire steering device includes a first member, a second member, and a stopper. The first member includes a first base surrounding an input shaft and rotatable, a first protrusion protruding from the first base in a radial direction or in an axial direction, and a first weight provided on the first base so as to make a weighted center consistent with a center of the input shaft. The second member is rotatable together with the first member with the first protrusion being abutting the second protrusion. The stopper is provided on a trajectory of the second protrusion, and is capable of restricting the turn of a steering wheel via the input shaft when abutting with the second protrusion.

Described herein are steer-by-wire systems and methods of operating these systems in vehicles. A steer-by-wire system comprises a steering wheel assembly, comprising a steering wheel, sensors, and a torque generator. The system comprises a rack assembly, comprising a steering rack, sensors, and a rack actuator. The steering wheel assembly and the rack assembly are communicatively coupled by a steer-by-wire system controller, without having any direct mechanical links between the assemblies. In some examples, the controller instructs the rack assembly to control the steering rack position based on the steering input, such as changes in the steering wheel position. A steering map is used to determine the desired steering rack position based on the current steering wheel position. In some examples, a steering map is selected from a steering map set based on, e.g., the vehicle speed, vehicle direction, driver preference, and the like.

A steer-by-wire system for a land vehicle, having a steering wheel, a feedback actuator, a detection device equipped to detect a driver's intention to enter the vehicle and/or a driver's intention to exit the vehicle, and an electronic control system, which, following detection of the intention to enter the vehicle and/or the intention to exit the vehicle controls the feedback actuator to hold the steering wheel in a predetermined rotational position by generating a holding torque. When an actuating torque which exceeds the holding torque is applied manually to the steering wheel and the steering wheel is rotated out of the predetermined rotational position, the electronic control system continuously approximates a turning angle of the predetermined rotational position to a turning angle of a current rotational position of the steering wheel using a specified time-based adjustment function based on a difference between the actuating torque and the holding torque.

According to the present embodiments, it is possible to enhance the driver's steering feel with a simplified structure, reduce components, save manufacturing and processing costs, and prevent overshoot to secure the driver's safety.

A steer-by-wire system and method for a vehicle, including and utilizing: a steering wheel system including a steering wheel, an angle sensor or mechanism coupled or applied to the steering wheel and for determining an angular magnitude of the steering wheel and provide a corresponding control signal, and an angular rate sensor or mechanism coupled or applied to the steering wheel and for determining an angular rate of the steering wheel and provide a corresponding control signal offset; and a steering actuator system including a wheel angle actuator coupled to one or more wheels of the vehicle and for receiving the collective control signal and control signal offset and turning the wheels in response. The steering wheel system further includes an angular rate filter/tuner for receiving an angular rate input from the angular rate sensor or mechanism and deriving an angular offset output corresponding to the control signal offset.