Modeling and feedback linearization based control of an electromagnetic clutch actuator

In automotive clutch applications the use of purely electromagnetic actuators is not yet very common. Their dynamics are nonlinear and often subject to kinematic constraints. Therefore their accurate control is a challenging task. In this paper, a plant model of an electromagnetic clutch actuator is developed from the corresponding physical principles. On this basis, a position controller for the electromagnet's armature utilizing feedback linearization is presented. It allows smooth and fast armature movement without introducing unwanted torque jerks into the drive train. The effectiveness of the control strategy is shown in simulations where it is compared to a conventional PID controller.