Abstract: A method may be utilized to control a steer-by-wire steering system for a motor vehicle that includes an electronically controllable steering actuator that acts on steered wheels, a control unit, a feedback actuator to which a driver's request for a steering angle can be applied by a driver via steering input means and which outputs a feedback signal to the steering input means as a reaction to the driver's request and a driving condition of the motor vehicle, and a signal transmission that transmits the driver's request to the control unit. The control unit controls the steering actuator to convert the driver's request into deflection of the steered wheels. The method may involve determining wheel slip of a front wheel, performing frequency analysis of a profile over time of a wheel slip signal of the front wheel, and determining the feedback signal based on the result of the frequency analysis.

Abstract: The present disclosure relates to a method for operating an operating system (1.1, 1.2, 1.3) of a motor vehicle, in which a control command (M1) for controlling the motor vehicle is specified via a control element (3.1, 3.2, 3.3), the control command (M1) specified via the control element (3.1, 3.2, 3.3) is sensorially acquired and passed on from an electronic control unit (4) to an electromechanical actuator unit (5.1, 5.2, 5.3) as a control signal, wherein the actuator unit (5.1, 5.2, 5.3) implements the control command (M1) according to the control signal. The operating system (1.1, 1.2, 1.3) is monitored here for an occurrence of a deviation from a target behaviour of the actuator unit (5.1, 5.2, 5.3), wherein tactile feedback is applied to the control element (3.1, 3.2, 3.3) if a deviation is detected.

Abstract: A method of operating a steer-by-wire steering system of a motor vehicle to convert a steering command into a steering movement of steerable wheels of a motor vehicle is disclosed. The method includes sending a control signal to an electric motor of a steering actuator and converting the received control signal into a mechanical movement of the steering actuator by the electric motor, wherein the steering actuator acts on a coupling element, and wherein the electric motor is operated in a generator mode.

Abstract: A method can be used to control a steer-by-wire steering system for a motor vehicle that has two axles each with two wheels. Two front wheels can be steered by front-wheel steering and two rear wheels can be steered by rear-wheel steering. The motor vehicle includes a single wheel drive that is assigned to one of the two axles and drives the two wheels of the corresponding axle via a differential. The motor vehicle comprises an inboard braking system. The method involves checking the motor vehicle speed and activating rear-axle steering when a motor vehicle speed should be slower than 40 km/hr. With rear-axle steering active, the following steps are performed: deactivating front-wheel steering and rear-wheel steering, determining a reference position of a first steering rod via a reference wheel steering angle, determining a differential drive torque between the rear wheels to reach the reference position via a control unit.

Abstract: A method can be used to control a steer-by-wire steering system for a motor vehicle that has two axles each with two wheels. Two front wheels can be steered by front-wheel steering and two rear wheels can be steered by rear-wheel steering. The motor vehicle includes a single wheel drive that is assigned to one of the two axles and drives the two wheels of the corresponding axle via a differential. The motor vehicle comprises an inboard braking system. The method involves checking the motor vehicle speed and activating rear-axle steering when a motor vehicle speed should be slower than 40 km/hr. With rear-axle steering active, the following steps are performed: deactivating front-wheel steering and rear-wheel steering, determining a reference position of a first steering rod via a reference wheel steering angle, determining a differential drive torque between the rear wheels to reach the reference position via a control unit.

Abstract: A vehicle may have actuators, including a drive device with a drive motor that can act on a drive wheel, a brake device with a brake that can act on a drive wheel, and/or a steering device with a steering sensor by way of which the steering angle of a wheel is adjustable, a vehicle movement controller, and a setpoint value input means, a setpoint value processing means for detecting setpoint value settings of the setpoint value input means, to calculate a yaw acceleration setpoint value and translational acceleration setpoint values from the setpoint value settings. The setpoint value processing means may be configured to transfer the calculated yaw acceleration setpoint value and translational acceleration setpoint values to the vehicle movement controller, which is configured to actuate one or more of the actuators such that the yaw acceleration setpoint value and the translational acceleration setpoint values are reached.

Abstract: A method can be used to control a steer-by-wire steering system in an emergency steering mode. The method comprises checking a steering system for the presence of a fault state and upon detection of a fault implementing the emergency steering mode, which involves determining a setpoint position of a steering tie rod using a setpoint wheel steering angle, determining a front wheel to be braked and a brake pressure to attain the setpoint position with a control unit, transmitting the front wheel to be braked and the brake pressure to a brake system, braking the front wheel to be braked, and increasing a torque provided by a wheel drive to compensate for a loss of speed of the motor vehicle caused by the braking of the front wheel to be braked.

Abstract: A steer-by-wire steering system for a motor vehicle with a steerable front wheel axle that has two steerable wheels. The front wheel axle includes a single wheel drive which, by means of a drive controller, individually drives wheel drives which are associated with the steerable wheels. The drive controller has a controller which determines a target speed for the left-hand wheel and a target speed for the right-hand wheel in accordance with an accelerator pedal angle and a rotational angle of a steering shaft, and which limits the target speeds to a slip-limited speed. The drive controller individually drives the wheel drives in such a way that the difference between the target speed and the actual speed for each steerable wheel is minimal.

Abstract: A method for determining a wheel radius of a motor vehicle, including calculating a yaw rate of the motor vehicle by means of a wheel speed of at least one wheel and a predefined wheel radius. The calculated yaw rate is compared with a measured yaw rate. The wheel speed is adapted. The calculation of the yaw rate is input, of the at least one wheel by means of a correction factor, so that the calculated yaw rate is equal to the measured yaw rate. The correction factor and the predefined wheel radius or the wheel speed is multiplied. The calculation of the yaw rate is input, for the determination of a corrected wheel radius or of a corrected wheel speed.

Abstract: Systems and methods for preventing roll-over of a motor vehicle in the event of a transverse load change. The motor vehicle has an individual-wheel drive designed to drive a wheel that is loaded by the transverse load change independently of the at least one other wheel of the motor vehicle. One methods includes identifying a critical state of the motor vehicle in the event of a transverse load change, applying a drive torque by the individual-wheel drive to the motor vehicle wheel that is loaded by the transverse load change such that the wheel that is loaded by the transverse load change is caused to slip, and steering the motor vehicle wheel that is loaded by the transverse load change in the direction of the direction of travel such that a roll-over of the motor vehicle can be prevented.

Abstract: A method may be utilized to control a steer-by-wire steering system for a motor vehicle that includes an electronically controllable steering actuator that acts on steered wheels, a control unit, a feedback actuator to which a driver's request for a steering angle can be applied by a driver via steering input means and which outputs a feedback signal to the steering input means as a reaction to the driver's request and a driving condition of the motor vehicle, and a signal transmission that transmits the driver's request to the control unit. The control unit controls the steering actuator to convert the driver's request into deflection of the steered wheels. The method may involve determining wheel slip of a front wheel, performing frequency analysis of a profile over time of a wheel slip signal of the front wheel, and determining the feedback signal based on the result of the frequency analysis.

Abstract: A method for determining a wheel radius of a motor vehicle, including calculating a yaw rate of the motor vehicle by means of a wheel speed of at least one wheel and a predefined wheel radius. The calculated yaw rate is compared with a measured yaw rate. The wheel speed is adapted. The calculation of the yaw rate is input, of the at least one wheel by means of a correction factor, so that the calculated yaw rate is equal to the measured yaw rate. The correction factor and the predefined wheel radius or the wheel speed is multiplied. The calculation of the yaw rate is input, for the determination of a corrected wheel radius or of a corrected wheel speed.

Abstract: Systems and methods for preventing roll-over of a motor vehicle in the event of a transverse load change. The motor vehicle has an individual-wheel drive designed to drive a wheel that is loaded by the transverse load change independently of the at least one other wheel of the motor vehicle. One methods includes identifying a critical state of the motor vehicle in the event of a transverse load change, applying a drive torque by the individual-wheel drive to the motor vehicle wheel that is loaded by the transverse load change such that the wheel that is loaded by the transverse load change is caused to slip, and steering the motor vehicle wheel that is loaded by the transverse load change in the direction of the direction of travel such that a roll-over of the motor vehicle can be prevented.

Abstract: A method and system for rack-and-pinion position adjustment for a steer-by-wire steering system for a motor vehicle. A module provides adjustment of the rack-and-pinion position, by determining a position error from a difference between desired and estimated value(s) of the rack-and-pinion position and the rack-and-pinion speed in a feedback structure, from which a control variable is determined for controlling the rack-and-pinion and a disturbance variable compensation for the control variable is carried out in a feedforward structure by means of a rack force estimation.

Abstract: A steer-by-wire steering system for a motor vehicle with a steerable front wheel axle that has two steerable wheels. The front wheel axle includes a single wheel drive which, by means of a drive controller, individually drives wheel drives which are associated with the steerable wheels. The drive controller has a controller which determines a target speed for the left-hand wheel and a target speed for the right-hand wheel in accordance with an accelerator pedal angle and a rotational angle of a steering shaft, and which limits the target speeds to a slip-limited speed. The drive controller individually drives the wheel drives in such a way that the difference between the target speed and the actual speed for each steerable wheel is minimal.