Design of two-degrees-of-freedom controller which simultaneously performs force control and shunt damping of voice coil motor

Abstract

In general, PI feedback control is used for actuation by the voice coil motor. However, if the mechanical system is subjected to disturbance, the vibration of the system is not significantly suppressed. One of vibration damping methods using a voice coil motor is electromagnetic shunt damping, which can suppress the vibration only by attaching the shunt circuit to the voice coil motor. In this paper, we propose the two-degrees-of-freedom control which simultaneously performs force control and electromagnetic shunt damping.