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Robust composite nonlinear feedback control for spacecraft rendezvous systems under parameter uncertainty, external disturbance, and input saturation

Namdari, H ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1177/0954410018790368
  3. Publisher: SAGE Publications Ltd , 2018
  4. Abstract:
  5. This paper presents a new robust composite nonlinear feedback control law for accurate, smooth, and fast regulation in the presence of parameter uncertainties, external disturbances, and input saturation for a class of spacecraft rendezvous systems. The novel proposed method consists of the original composite nonlinear feedback part for good transient performance plus a nonlinear disturbance rejection part for reducing the steady-state error stemming from variable disturbances and simultaneously producing feasible control input. The nonlinear disturbance rejection relies on sliding-mode observer for disturbance estimation. Closed-loop system stability has been proved with the Lyapunov theory. Simulation results show the closed-loop stability and superior control performance. © IMechE 2018
  6. Keywords:
  7. Nonlinear disturbance rejection ; Robust composite nonlinear feedback ; Closed loop systems ; Discrete time control systems ; Disturbance rejection ; Feedback control ; Robust control ; Space rendezvous ; System stability ; Composite nonlinear feedbacks ; Nonlinear disturbance ; Rendezvous ; Uncertainty ; Variable disturbance ; Nonlinear feedback
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; 2018 ; 09544100 (ISSN)
  9. URL: https://journals.sagepub.com/doi/10.1177/0954410018790368