Abstract: A method for controlling a steer-by-wire steering system for a motor vehicle may involve determining a torque request signal with a position controller of an activation unit based at least on a desired steering angle and an actual steering angle, limiting the torque request signal in a signal limiting device of the activation unit such that the torque requested by the limited torque request signal is limited to a permissible torque range, and transmitting the limited torque request signal to an electronically controllable steering actuator. The signal limiting device may determine a reference torque signal by way of a reference controller based at least on the desired steering angle and the actual steering angle. The signal limiting device may define the permissible torque range by way of a selectable maximum deviation from the reference torque signal.

Abstract: A method for controlling a steer-by-wire steering system for motor vehicles includes a steering actuator that acts on the steered wheels and is electronically controlled in accordance with a steering request. A feedback actuator transmits reactions of the road to a steering wheel. A control unit controls the feedback actuator. The method includes determining a basic motor torque; providing at least one steering function which is part of a first subgroup of steering functions; limiting the output value of the at least one steering function to reach a predefined safety level in a first limiter; adapting the basic motor torque by means of the limited output value of the at least one steering function in a summing element; and actuating the feedback actuator with the resulting motor torque which is output by the summing element.

Abstract: A method for controlling a steer-by-wire steering system involves determining a torque request signal with a position controller based on desired and actual steering angles, checking with a checking device for an error state of the position controller, selecting the torque request signal as a checked torque request signal if the error state has not been determined, selecting a reference torque signal as the checked torque request signal if the error state has been determined, and transmitting the checked torque request signal to the steering actuator. By evaluating a cumulative deviation variable, which is calculated by a calculation unit of the checking device as a time integral over a control deviation between the desired and actual steering angles, the checking device determines whether the error state is present and determines the reference torque signal with a reference controller based on the control deviation.

Abstract: A method for controlling a steer-by-wire steering system for a motor vehicle may involve determining a torque request signal with a position controller of an activation unit based at least on a desired steering angle and an actual steering angle, limiting the torque request signal in a signal limiting device of the activation unit such that the torque requested by the limited torque request signal is limited to a permissible torque range, and transmitting the limited torque request signal to an electronically controllable steering actuator. The signal limiting device may determine a reference torque signal by way of a reference controller based at least on the desired steering angle and the actual steering angle. The signal limiting device may define the permissible torque range by way of a selectable maximum deviation from the reference torque signal.

Abstract: A method for controlling a steer-by-wire steering system for motor vehicles includes a steering actuator that acts on the steered wheels and is electronically controlled in accordance with a steering request. A feedback actuator transmits reactions of the road to a steering wheel. A control unit controls the feedback actuator. The method includes determining a basic motor torque; providing at least one steering function which is part of a first subgroup of steering functions; limiting the output value of the at least one steering function to reach a predefined safety level in a first limiter; adapting the basic motor torque by means of the limited output value of the at least one steering function in a summing element; and actuating the feedback actuator with the resulting motor torque which is output by the summing element.