Nonlinear attitude control scheme with disturbance observer for flexible spacecrafts

被引：56
|
作者：
Wang, Zhen [1 ]
Wu, Zhong [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China
来源：
NONLINEAR DYNAMICS | 2015年 / 81卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Flexible spacecraft; Feedback linearization control; Nonlinear disturbance observer; Multiple disturbances; SLIDING-MODE CONTROL; FEEDBACK-CONTROL; CONTROL DESIGN; TRACKING; SYSTEMS;
D O I：
10.1007/s11071-015-1987-3
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
To attenuate the effects of parameter variations and disturbances of flexible spacecrafts on attitude control accuracy and stability, a composite control approach by combining nonlinear disturbance observer (NDO) and feedback linearization (FBL) control is proposed. In this paper, the multiple disturbances that act on spacecrafts from flexible appendages, space environment, and unmodelled dynamics are considered as an 'equivalent' disturbance. The proposed NDO is used to estimate and compensate for the disturbances through feedforward. Stability and tracking performance of the NDO are then analyzed. Moreover, the stability of the FBL+NDO composite control approach is established through the Lyapunov method. Simulation results show that the NDO can estimate disturbances and reduce the effect of disturbances on spacecrafts through feedforward compensation. Robust dynamic performance and attitude control accuracy are effectively improved.
引用
收藏
页码：257 / 264
页数：8
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