Fuzzy Disturbance Observer-Based Sliding Mode Control for Liquid-Filled Spacecraft With Flexible Structure Under Control Saturation

被引：9
|
作者：
Dou, Liqian [1 ]
Du, Miaomiao [1 ]
Zhang, Xiuyun [1 ]
Du, Hui [1 ]
Liu, Wenjing [2 ]
机构：
[1] Tianjin Univ, Sch Elect & Informat Engn, Tianjin 300072, Peoples R China
[2] Beijing Inst Control Engn, Sci & Technol Space Intelligent Control Lab, Beijing 100101, Peoples R China
来源：
IEEE ACCESS | 2019年 / 7卷
基金：
国家教育部科学基金资助;
关键词：
Space vehicles; Uncertainty; Liquids; Fuzzy logic; Stability analysis; Sliding mode control; Disturbance observers; Spacecraft; flexible vibration; liquid fuel slosh; control saturation; fuzzy disturbance observer; terminal sliding mode control; ATTITUDE TRACKING CONTROL; FAULT-TOLERANT CONTROL; RIGID SPACECRAFT; DESIGN; STABILIZATION; SUBJECT;
D O I：
10.1109/ACCESS.2019.2946961
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper investigates a fuzzy disturbance observer (FDO)-based terminal sliding mode control (TSMC) strategy for the liquid-filled spacecraft with flexible structure(LFS-FS) under control saturation. Firstly, a novel FDO is designed to estimate the lumped uncertainty, including the inertia uncertainty, external disturbance, the coupling of liquid slosh and flexible structure(LF), as well as the parts that exceed control saturation. The merits of the FDO lie in that estimation error can be arbitrarily small by adjusting the designed parameters and the prior information is not required. Then, based on the estimation of FDO, a finite-time TSMC is designed, which has more satisfactory control performance, such as chattering reduction and fast convergence speed. The stability of the closed-loop system is proved strictly by Lyapunov theory. Finally, numerical simulations are presented to demonstrate the effectiveness of the proposed method.
引用
收藏
页码：149810 / 149819
页数：10
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