Study on sliding mode variable structure control for gyro stabilized system

Abstract

Since PID control does not meet the high accuracy requirement for gyro stabilized sighting system of airborne optoelectronic pod operated in the circumstance of strong interference, this paper introduces the application of sliding mode variable structure controller for the position loop of the stabilized system. After the sliding mode variable structure controller with exponential approach law is implemented, the stabilized sighting system exhibits higher performance than what done by PID controller. The position accuracy, swiftness, and robustness of the system are all improved.Index Terms -sliding mode variable structure control; PID control; exponential approach law; gyro stabilized system.