Acceleration Estimation for Linear Oscillatory Actuator with 2 pole and 3 pole movers.

Abstract

　Recently, a linear oscillatory actuator with two movers are developed and are applied as active vibration control devices that can reduce vibration in a wide frequency range. In the system, inertial force is controlled by using acceleration information on movers that obtained from acceleration sensors. In this paper, an acceleration estimation method using extended Kalman filter is suggested for sensorless control. The future of the suggested method is that nonlinear detent characteristics depending positions on two movers are considered in the state model of extended Kalman filter. As a result of online estimation using a controller and prototype, estimation values agreed with measured.