Disturbance observer based finite-time attitude control for rigid spacecraft under input saturation

被引：162
作者：
Hu, Qinglei [1 ,2 ]
Li, Bo [2 ]
Qi, Juntong [3 ]
机构：
[1] Beihang Univ, Sch Automat Sci & Elect Engn, Beijing 100191, Peoples R China
[2] Harbin Inst Technol, Dept Control Sci & Engn, Harbin 150001, Peoples R China
[3] Chinese Acad Sci, Shenyang Inst Automat, State Key Lab Robot, Shenyang 110016, Peoples R China
来源：
AEROSPACE SCIENCE AND TECHNOLOGY | 2014年 / 39卷
基金：
中国国家自然科学基金;
关键词：
Spacecraft; Finite-time control; Disturbance observer; Input saturation; Misalignment; SLIDING-MODE CONTROL; VARIABLE-STRUCTURE SYSTEMS; FLEXIBLE SPACECRAFT; TRACKING CONTROL; L-2-GAIN PERFORMANCE; CONTROL CONSTRAINTS; FEEDBACK-CONTROL; CONTROL DESIGN; STABILIZATION; CONVERGENCE;
D O I：
10.1016/j.ast.2014.08.009
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
A novel finite-time controller integrated with disturbance observer is investigated for a rigid spacecraft in the presence of disturbance, actuator saturation and misalignment. As a stepping-stone, a second-order disturbance observer is designed firstly such that the reconstruction of lumped disturbances is accomplished in finite time with zero error. Then, with the reconstructed information, a finite-time controller is synthesized even under actuator input saturation and misalignment, and the closed-loop system/state is proved to be finite-time stable and converges to the specified time-varying sliding mode surface. Moreover, the input saturation constraint is overcome via introducing an auxiliary variable to compensate for the overshooting. Numerical simulation results for the in-orbit rigid spacecraft show good performances, which validate the effectiveness and feasibility of the proposed schemes. (C) 2014 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：13 / 21
页数：9
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