A motor control device that enables a reduction of an unpleasant sensation caused by vibration or noise occurring in a motor is obtained. A motor control device including a first control unit that drives a first motor winding and a second control unit that drives a second motor winding is such that the first control unit selects the lower of values of an own power supply voltage and a power supply voltage of the second control unit and outputs a post-selection power supply voltage, and computes a target d-axis current, a target q-axis voltage, and a target d-axis voltage using the post-selection power supply voltage.

Methods and apparatus to reduce noise and vibration in a hybrid hydraulic power steering system are disclosed. A method includes receiving sensor data from sensors of a vehicle and mapping the sensor data to filter coefficients. The method further includes generating a torque demand based on an input of the filter coefficients into a polynomial filter and tuning at least one of a torque assistance or a steering damping of an assisted steering system of the vehicle based on the torque demand.

A control device includes a current command value calculation unit configured to calculate a first current command value causing an actuator to generate steering assist torque, a correction value calculation unit configured to, when an absolute value of steering angle is greater than or equal to a threshold value, calculate a correction value for suppressing increase in an absolute value of the steering angle by correcting the steering assist torque, a correction unit configured to calculate a second current command value obtained by correcting the first current command value by the correction value, and a driving unit configured to drive the actuator, based on the second current command value. The correction value calculation unit calculates the correction value, based on first torque, the first torque changing nonlinearly with respect to steering angular velocity.

Both responsiveness and stability of a power assist control system are satisfied. A processor executes, in accordance with a program, determining base assist gain based on steering torque and base assist torque, generating stabilizing compensation torque based on the base assist torque, with use of a stabilizing compensator that has a second-order or higher transfer function in which a frequency characteristic is variable in accordance with the base assist gain and which is expressed using a responsiveness parameter ω and a damping parameter ζ, and generating a current command value for use in control of the motor based on the stabilizing compensation torque.

Control systems and methods for an electric power steering (EPS) system of a vehicle include obtaining, by a controller of the vehicle and from a set of sensors, a set of parameters of an electric motor of the EPS system, the EPS system further comprising a steering column and a steering wheel, and controlling, by the controller, the EPS system by based on the set of measured parameters of the electric motor, performing vector type recursive least squares estimation (RLSE) of a plurality of lumped EPS parameters including applying a variable forgetting factor, generating steering angle torque commands based on the estimated plurality of lumped EPS parameters, and controlling the electric motor of the EPS based on the generated steering angle torque commands for more accurate control of a trajectory of the vehicle.

The disclosure relates to a method for reducing loads in a steering system in particular during an operation in a vehicle, wherein a load caused by an external application of force on the steering system is determined and at least partially compensated in at least one operating state by controlling an actuator unit, and wherein the actuator unit is controlled in the operating state in such a way that an inertia effect of the steering system correlating with the external application of force is reduced.

The disclosure relates to a method and to a device for controlling a steering system and to a steering system having electric steering assistance, wherein a reference variable for the steering assistance is predefined by a steering controller, the steering system is controlled as a function of the reference variable, a compensation value to compensate for a dynamic behavior of an axle steered by the steering system is determined on the basis of a model, the reference variable is determined as a function of the compensation value. The disclosure further relates to a method and to a device for emulating dynamics of the steered axle.

A control device obtains a post-code extension steering torque by performing moving average processing of weighting an oversampling signal obtained by oversampling processing, obtains a base assist torque based on the post-code extension steering torque signal, acquires a base assist torque signal that decreases the base assist torque as a vehicle speed increases, performs stabilization processing on the base assist torque signal to obtain an assist torque signal according to the assist torque of an electric power steering device.

A control device obtains an assist torque of an electric power steering device based on a steering torque, compensates for the assist torque, varies an amount of change in a compensation amount based on the steering torque, and increases the compensation amount to cancel a disturbance of the assist torque as a frequency of a disturbance affecting the steering system increases.

The disclosure relates to a method for operating a steering system for a motor vehicle, which steering system has, on the one hand, a steering handle which can be operated by a driver of the motor vehicle, and a hand torque adjuster which is assigned to the steering handle and is designed to apply a damper force, counteracting the operation by the driver, to the steering handle, and, on the other hand, a wheel angle adjuster which is coupled to at least one steerable wheel of the motor vehicle and which is electrically actuated as a function of operation of the steering handle in order to set a steering angle of the at least one wheel. There is provision that the damper force is generated by the manual torque adjuster as a function of a current performance of the wheel angle adjuster.