Finite Time Coordinated Attitude Control for Spacecraft Formation Flying Under Input Saturation

Abstract

In this paper, finitetime attitude coordinated control for spacecraft formation flying (SFF) subjected to input saturation is investigated. More specifically, a bounded finitetime state feedback control law is first developed with the assumption that both attitude and angular velocity signals can be measured and transmitted between formation members. Then, a bounded finitetime output feedback controller is designed with the addition of a filter, which removes the requirement of the angular velocity measurements. In both cases, actuator saturation is explicitly taken into account, and the homogeneous system method is employed to demonstrate the finitetime stability of the closedloop system. Numerical simulation results are presented to illustrate the efficiency of the proposed control schemes.