Line-of-sight stabilization by robust L1 controller based on Linear Matrix Inequality (LMI) approach

Abstract

Vibration reduces the ability of a camera to detect far-away targets that lead to the use of stabilized platforms. Despite much research on stabilized platforms, the need of more accurate systems still exists as a consequence of sensor resolution improvements. The stabilization problem is the problem of attenuating persistent disturbances which is a suitable case-study for L1 control problem. In this article, a robust L1 controller is designed for a nonlinear gyro-stabilized system based on LMI approach. The performance of the introduced controller is evaluated by simulation and is compared with a robust H infinite controller. Using the proposed approach, the stability accuracy of the platform improves significantly.