Disturbance Observer-Based Nonsingular Terminal Sliding Mode Control for Spacecraft Electromagnetic Docking
Joint Authors
Zhang, Jinghui
Zeng, Guoqiang
Zhang, Shifeng
Source
International Journal of Aerospace Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-20, 20 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-28
Country of Publication
Egypt
No. of Pages
20
Abstract EN
This paper presents a novel nonlinear sliding mode control scheme that combines on-line model modification, a nonlinear sliding mode controller, and a disturbance observer to solve the essential problems in spacecraft electromagnetic docking control, such as model uncertainties, unknown external disturbances, and inherent strong nonlinearity and coupling.
An improved far-field model of electromagnetic force which is much more accurate than the widely used far-field model is proposed to enable the model parameters to be on-line self-adjusting.
Then, the relationship between magnetic moment allocation and energy consumption is derived, and the optimal direction of the magnetic moment vector is obtained.
Based on the proposed improved far-field model and the research results of magnetic moment allocation law, a fast-nonsingular terminal mode controller driven by a disturbance observer is designed in the presence of model uncertainties and external disturbances.
The proposed control method is guaranteed to be chattering-free and to possess superior properties such as finite-time convergence, high-precision tracking, and strong robustness.
Two simulation scenarios are conducted to illustrate the necessity of modifying the far-field model and the effectiveness of the proposed control scheme.
The simulation results indicate the realization of electromagnetic soft docking and validate the merits of the proposed control scheme.
In the end of this paper, some conclusions are drawn.
American Psychological Association (APA)
Zhang, Jinghui& Zeng, Guoqiang& Zhang, Shifeng. 2020. Disturbance Observer-Based Nonsingular Terminal Sliding Mode Control for Spacecraft Electromagnetic Docking. International Journal of Aerospace Engineering،Vol. 2020, no. 2020, pp.1-20.
https://search.emarefa.net/detail/BIM-1168495
Modern Language Association (MLA)
Zhang, Jinghui…[et al.]. Disturbance Observer-Based Nonsingular Terminal Sliding Mode Control for Spacecraft Electromagnetic Docking. International Journal of Aerospace Engineering No. 2020 (2020), pp.1-20.
https://search.emarefa.net/detail/BIM-1168495
American Medical Association (AMA)
Zhang, Jinghui& Zeng, Guoqiang& Zhang, Shifeng. Disturbance Observer-Based Nonsingular Terminal Sliding Mode Control for Spacecraft Electromagnetic Docking. International Journal of Aerospace Engineering. 2020. Vol. 2020, no. 2020, pp.1-20.
https://search.emarefa.net/detail/BIM-1168495
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168495