Abstract: A steering input device for controlling a vehicle according to the steer-by-wire concept. A power train has a moveable steering unit and a drive device with a drive motor for generating a torque acting on the steering unit. The power train also has a controllable magnetorheological coupling device with two coupling components that can be rotated relative to one another. The coupling device is connected in series with the drive device in the power train. A torque can be transmitted between the drive device and the steering unit by the coupling device and can be changed in a targeted manner.

Abstract: A device having a movable transmission element and an actuator for influencing the mobility of the transmission element. The actuator has a magnetorheological brake for producing a braking torque which acts on the transmission element and a drive for producing a torque which acts on the transmission element. The brake and the drive are arranged adjacent to one another on a common receiving structure.

Abstract: A steering input device for specifying a steering movement according to the steer-by-wire concept, with a moveable steering unit and a drive device for generating a torque acting on the steering unit. A fault protection system, in the event of a fault of the drive device, operates the steering unit by neither being blocked nor moved without resistance. The fault protection system has a braking device that is independent of the drive device, and has a maximum braking torque that is less than a maximum torque of the drive device. The fault protection system is configured to actuate the braking device in the event of a malfunction of the drive device, and to thereby brake the movement of the steering unit with a targeted emergency braking torque.

Abstract: A steering input device for controlling a vehicle according to the steer-by-wire concept. A power train has a moveable steering unit and a drive device with a drive motor for generating a torque acting on the steering unit. The power train also has a controllable magnetorheological coupling device with two coupling components that can be rotated relative to one another. The coupling device is connected in series with the drive device in the power train. A torque can be transmitted between the drive device and the steering unit by the coupling device and can be changed in a targeted manner.