System identification and Robust control for a Stabilization system of a two-axis gimbaled sensor

Abstract

The objective of this paper is system identification and design of a robust H ∞ controller for a stabilization system of a two-axis gimbaled sensor. Typically the tracking gimbaled sensor is mounted on a missile to track a dynamic target. The tracking is bound to destabilize from the wind disturbances and vibrations of a missile. Stabilization is meant for providing rejection of disturbances induced in the sensor by the missile's motion. Using frequency domain system identification approach the plant transfer function has identified on the basis of experimental freqency response data. The identified plant model consists of gimbal and actuator dynamics. Here a feed back H ∞ suboptimal controller is designed to stbilize the sensor such that tracking is uninterupted. The performance simulation results with H ∞ controller has shown in this paper.