Abstract: A test bench for testing a brake comprises a pressure generating assembly for providing a brake fluid with an increased hydraulic pressure, a test bench control, and an electromechanical brake actuator. The pressure generating assembly is actuated mechanically and the brake fluid is supplied to the brake to actuate the brake. The electromechanical brake actuator, which simulates a vehicle driver's braking foot, is provided for mechanical actuation of the pressure generating assembly. The brake actuator comprises an electric motor activated by the test bench control and a planetary roller screw drive driven by the electric motor. The planetary roller screw drive is mechanically coupled to the pressure generating assembly to mechanically actuate the pressure generating assembly.

Abstract: Method of simulating the performance of a vehicle on a roadway on a power train test bed with the help of torque-controlled electric load machines mounted on the shafts of the power train of the vehicle and with the help of a computer with a vehicle model stored therein and a tire model simulating the slip-dependent friction, in which method the angular wheel speed is measured on at least one of the shafts, and the tire model determines a force transmitted from the tire to the roadway at this angular wheel speed on the basis of the tire model using a vehicle velocity and a tire normal force, and it also determines a setpoint torque for this force for the torque-controlled load machine mounted on this shaft, in such a way that a difference corresponding to the actual slip is established between the measured angular wheel speed and a nominal angular wheel speed value corresponding to the vehicle velocity used in the tire model and calculated in the vehicle model with feedback of the force transferred to the roa