A control method of a motor driven power steering (MDPS) for a vehicle may include determining a steering angle of a steering wheel of the vehicle; determining a steering torque variation rate of the vehicle; counting an exceeding number of times that the steering torque variation rate exceeds a predetermined value to store the counted number of times in an MDPS system; and deleting the number of times stored in the MDPS system when the exceeding number of times is less than a predetermined number of times, and applying a reverse phase compensation torque to a steering motor when the exceeding number of times is equal to or larger than the predetermined number of times.

A method for determining a setpoint torque for a steering wheel of a power-assisted steering system of a vehicle, the setpoint torque making it possible to determine a motor torque applied directly or indirectly by a control motor to the steering wheel, and the setpoint torque being at least determined by a reversibility function designed to bring a steering wheel angle of the steering wheel toward the steering wheel angle at which the vehicle will follow a trajectory in a straight line, the reversibility function comprising a first step in which a target speed of the steering wheel is determined depending on the steering wheel angle, wherein the target speed is also a function of a yaw rate of the vehicle.

A steering system includes a steering shaft; a motor configured to generate a torque applied to the steering shaft; and a control unit configured to control the motor. The control unit has a function of performing steering angle feedback control for causing a steering angle that is a rotation angle of a steering wheel to reach a target steering angle that is set based on a point of view of adjusting a rotational position of the steering wheel, as an adjustment process of adjusting the rotational position of the steering wheel. The control unit is configured to set a limit value for limiting a change range of the target steering angle with respect to the steering angle at each moment in a period in which automatic rotation of the steering wheel is hindered in a case where the automatic rotation is hindered while the adjustment process is being performed.

There is provided an electric power steering device, including: a reverse steering detection unit configured to determine start of reverse steering when a magnitude of a rotational speed of a motor is equal to or smaller than a set speed, a rotational acceleration of the motor is in a direction of causing the rotational speed of the motor to become 0, and a magnitude of the rotational acceleration of the motor is equal to or larger than a set acceleration; and a current command control unit configured to output a current command for the motor based on the steering torque or the rotational speed of the motor, in which the current command control unit is configured to increase a transfer gain from input to output by the current command control unit when the reverse steering detection unit determines start of the reverse steering.

A control device (15) is equipped with a steering angle returning torque target value setting unit (30) which calculates a returning control amount target value (MapOut) based on a vehicle speed (Vs) and a turning angle (θb), and with a steering angle returning torque command signal calculation unit (31) which calculates a retuning control amount (RetOut) based on the retuning control amount target value (MapOut). The steering angle returning torque command signal calculation unit (31) is equipped with a rate limiter (36). The rate limiter (36) determines a change in the vehicle speed (Vs) from a vehicle speed sensor (19), and gradually increases or decreases the retuning control amount target value (MapOut) at a certain rate and then outputs the returning control amount (RetOut).

A method is proposed for operating a steering system of a motor vehicle, in particular an electromechanically supported steering system. First, at least one first virtual magnet and one second virtual magnet are provided in the steering system of the motor vehicle. A virtual magnetic force exerted on each other by the multiple virtual magnets is determined. A setpoint force that is to be applied to a lower part of the steering system is estimated and an auxiliary force with which a servo motor of the steering system acts on the lower part of the steering system is determined from the specified virtual magnetic force and the estimated setpoint force.

A method of controlling a steer-by-wire steering system for motor vehicles is disclosed for the calculation of a resulting self-aligning torque of a feedback actuator in a manner which is dependent on an operating state (hands-on/hands-off). The method includes determining of a base self-aligning torque for a first operating state, in which there is hand contact by a driver on a steering wheel, determining a hands-off self-aligning torque for a second operating state, in which there is no hand contact by the driver on the steering wheel, determining a self-aligning speed of the steering wheel for the first operating state and for the second operating state, and determining the resulting self-aligning torque on the basis of the base self-aligning torque or the hands-off self-aligning torque, as a result of which the steering wheel rotates at the defined self-aligning speed into the defined position.

In a steering control apparatus, a reaction force torque command value is calculated so that a detection value of a torque sensor follows a target value obtained by adding at least a viscosity command value and a return command value to a steering torque command value, and an electric current that flows to a reaction force rotary electric machine is controlled based on the reaction force torque command value. Whether a steering state is a turning state or a returning state is determined by comparing a physical quantity corresponding to an output torque of a reaction force device and the detection value of the torque sensor. Characteristics of one or more of a reaction force amount operation, a viscosity amount operation, and a return amount operation are made differ between the turning state and the returning state.

A method and a system for automatic yaw torque equalization (AYTE) in an electrically driven vehicle having wheel-individual torque distribution (torque vectoring drive).

A method for unintended steering mitigation includes receiving at least one hand wheel measurement correspond to a hand wheel of a vehicle. The method also includes determining a hand wheel return value corresponding to the at least one hand wheel measurement. The method also includes receiving a torque value corresponding to propulsion of the vehicle. The method also includes determining whether the torque value is above a threshold. The method also includes, in response to a determination that the torque value is above the threshold adjusting the hand wheel return value based on the torque value and selectively controlling return of the hand wheel based on the adjusted hand wheel return value.