Attitude Regulation of Flexible Spacecrafts with Unknown Control Directions and Input Disturbances  

作　　者：WU Haiwen XU Dabo 

机构地区：[1]School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China [2]Department of Mechanical and Automation Engineering,The Chinese University of Hong Kong,Hong Kong 999077,China [3]Shien-Ming Wu School of Intelligent Engineering,South China University of Technology Guangzhou International Campus,Guangzhou 511442,China

出　　处：《Journal of Systems Science & Complexity》2024年第6期2347-2367,共21页系统科学与复杂性学报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.62073168。

摘　　要：In this paper,the authors address the attitude regulation problem of uncertain flexible spacecraft with unknown control directions and input disturbances.The major challenges of the problem include the concurrence of the unknown actuation sign and the unknown parameters in both the plant and the external disturbances,along with the impact of vibrations from flexible appendages.To overcome these challenges,the authors transform the conventional mathematical model of a flexible spacecraft to a multivariable strict-feedback normal form and adopt a systematic approach within the framework of nonlinear output regulation.To solve the attitude regulation and disturbance rejection problem,the authors introduce a nonlinear internal model candidate to convert the problem into a stabilization problem for an augmented system.Then,a Nussbaum function-based stabilizer is designed to handle unknown control directions and complete the design.Simulation results are provided to show the effectiveness of the proposed controller.

关 键 词：Attitude control disturbance rejection internal model Nussbaum functions 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] V448.22[自动化与计算机技术—控制科学与工程]