Fuzzy Disturbance Observer-Based Sliding Mode Control for Liquid-Filled Spacecraft With Flexible Structure Under Control Saturation
| Autor: | Wenjing Liu, Hui Du, Miaomiao Du, Liqian Dou, Xiuyun Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Lyapunov function
flexible vibration General Computer Science Computer science media_common.quotation_subject Terminal sliding mode 02 engineering and technology Inertia 01 natural sciences Fuzzy logic Sliding mode control 010309 optics symbols.namesake Control theory terminal sliding mode control 0103 physical sciences General Materials Science Spacecraft liquid fuel slosh media_common business.industry General Engineering 021001 nanoscience & nanotechnology symbols fuzzy disturbance observer control saturation lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology business Reduction (mathematics) lcsh:TK1-9971 |
| Zdroj: | IEEE Access, Vol 7, Pp 149810-149819 (2019) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2019.2946961 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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