Switching cascade controllers combined with a feedforward regulation for an aggregate actuator in automotive applications

This work is devoted to a hybrid actuator which consists of a piezo and a hydraulic structure. Moreover, a cascade controller which consists of an internal PID and an external one combined with a feedforward regulator is proposed for the control strategy in an engine application. The main idea of this contribution is to realize a camless engine with its control. Simulation results consist of tracking of exhaust valve trajectories are shown.