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

作     者：Han GAO Yuanqing XIA Xiaopu ZHANG Guangchen ZHANG Han GAO;Yuanqing XIA;Xiaopu ZHANG;Guangchen ZHANG

作者机构：School of AutomationBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2022年第35卷第4期

页      面：292-302页

核心收录：

学科分类：08[工学] 081105[工学-导航、制导与控制] 0811[工学-控制科学与工程] 

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) 

主　　题：Multiple spacecraft Distributed attitude control Fixed-time observer Fixed-time controller Actuator saturation 

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.