Dry clutch control based on electromechanical actuator position feedback loop
by Joško Deur; Vladimir Ivanović; Zvonko Herold; Milan Kostelac; Hongtei Eric Tseng
International Journal of Vehicle Design (IJVD), Vol. 60, No. 3/4, 2012

Abstract: The paper presents identification and control of an experimental dry clutch actuated by a geared dc motor and ball-ramp mechanism. The identification results are used to describe the multi-dimensional clutch friction coefficient characteristic. The proposed clutch torque control system is based on closed-loop actuator position control and the identified friction coefficient curves. In order to compensate for a clutch pack thermal expansion effect, which affects the torque control accuracy, the control strategy is extended with feedforward or feedback path that outputs a position reference additive signal. The torque control strategy is verified experimentally within a clutch slip speed control system.

Online publication date: Tue, 23-Apr-2013

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