Improved disturbance observer based control for airborne photoelectric stabilized platform

Abstract

The aim of this work was to solve the problem that the stabilization accuracy of photoelectric stabilized platforms is affected by disturbance. An improved disturbance observer was established to observe the disturbance. By using the ultra-high control bandwidth of the current loop, the observer was used as the input of the current loop. The design of the improved disturbance observer consists of an inverse model of the control object and an improved filter. The high-order disturbance observer not only has good suppression ability compared to the high order disturbance model, but also has good robustness, meeting the application requirements of photoelectric stabilized platforms.