Controlled input-output-shaft synchronisation by a linear drive actuated hydraulic clutch-brake-combination

The focus of this paper is the control to accelerate and decelerate a drive shaft exactly with a hydraulic clutch-brake-combination (CBC). The CBC is actuated by a permanent magnet linear synchronous machine (PMLSM) with an integrated hydraulic cylinder. The servo-converter-controlled-PMLSM is able to generate the pressure for the CBC. A superposed control cascade with a pressure control and a special synchronization control is implemented to vary the transmitted torque and therefore the accurate acceleration and deceleration of the drive shaft within a preset angle. This development ensures a controlled synchronization of the input-output shaft by a CBC in a specific point of time within a preset mechanical angle.