BRAKE ACTUATOR FOR A BRAKE SYSTEM OF A VEHICLE, IN PARTICULAR OF A RAIL VEHICLE

The invention relates to a brake actuator (BA) for a brake system (B) of a vehicle, in particular of a rail vehicle (S), having a setpoint value control device (5) which adjusts at least one setpoint value (Sv) of a deceleration variable (Fv; Mv) to an output setpoint value (AS), having a setpoint value force conversion device (6) which converts the output setpoint value (AS) into an actual value (Ip) of a contact-pressure variable (Cp; Fp), and having brake means (9, 10, 11) which convert the actual value (Ip) of the contact-pressure variable (Cp; Fp) for braking the vehicle into an actual value (Iv) of the deceleration variable (Fv; Mv), in which brake actuator a sensor (7) determines the actual value (Ip) of the contact-pressure variable (Cp; Fp), in which brake actuator a further sensor (8) determines the actual value (Iv) of the deceleration variable (Fv; Mv), and in which brake actuator the setpoint value control device (5) is suitably designed, given predetermined operating conditions of the vehicle for controlling the deceleration variable (Fv; Mv), to set the output setpoint value (AS) such that the detected actual value (Iv) of the deceleration variable (Fv; Mv) corresponds to the at least one setpoint value (Sv) of the deceleration variable (Fv; Mv). In order to improve the ability to control the brake actuator, the setpoint value control device (5) is suitably designed, given further predetermined operating conditions of the vehicle for controlling the contact-pressure variable (Cp; Fp), to set the output setpoint value (AS) such that the detected actual value (Ip) of the contact-pressure variable (Cp; Fp) corresponds to a setpoint value (Sp) of the contact-pressure variable (Cp; Fp).