Finite Frequency Vibration Suppression for Space Flexible Structures in Tip Position Control

Abstract

This paper presents a novel control strategy for the tip position and vibration control of a class of space flexible structures. The proposed control algorithm consists of finite frequency H∞ vibration control technique and fractional-order PD v control technique. More specially, a new finite frequency H∞ controller working in the inner feedback loop is proposed to suppress vibration modes and external disturbances, and a new fractional-order PD v controller is developed in the outer feedback loop to guarantee the desired position tracking performance. Compared with conventional methods, the proposed one could achieve better control results. Finally, an illustrative example is presented to demonstrate the robustness and effectiveness of the proposed composite control strategy.