Distributed fixed-time attitude coordinated control for multiple spacecraft with actuator saturation  

作　　者：Han GAO Yuanqing XIA Xiaopu ZHANG Guangchen ZHANG 

机构地区：[1]School of Automation,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Chinese Journal of Aeronautics》2022年第4期292-302,共11页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61720106010,62003041);Science and Technology on Space Intelligent Control Laboratory,China(No.KGJZDSYS-2018-05);General Project of Ningxia Natural Science Fund,China(No.2020AAC03234)。

摘　　要：This paper investigates the distributed fixed-time attitude coordinated control problem for multiple spacecraft subject to actuator saturation under the directed topology. First, a distributed fixed-time observer is presented for each follower spacecraft to estimate the leader spacecraft’s states. Compared with the commonly used fixed-time observer, the settling time of the proposed fixed-time observer can be easily adjusted by some free design parameters. Next, a distributed fixed-time control scheme is derived by using the estimates of the leader spacecraft’s states and the adding a power integrator technique. When considering actuator saturation, an auxiliary system is utilized to compensate the saturation. Further, a rigorous theoretical proof is provided to show that the practical fixed-time stability of the closed-loop system is ensured. Finally, simulation results illustrate the benefits and effectiveness of the developed control scheme.

关 键 词：Multiple spacecraft Distributed attitude control Fixed-time observer Fixed-time controller Actuator saturation 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]