Fault-tolerant control of flexible satellite with magnetic actuation and reaction wheel

Hajkarim, M. H ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1177/09544100211029497
  3. Publisher: SAGE Publications Ltd , 2021
  4. Abstract:
  5. The attitude fault-tolerant control of a flexible satellite actuated by reaction wheels and magnetic torquer bars is investigated in this article. A low earth orbit is considered for moment perturbations such as drag and gravity gradient. Furthermore, the flexible panels attached to a rigid central body are modeled through the assumed mode approach by a finite set of bending modal motion. The ordinary differential equations of their generalized coordinates are found using Lagrange’s equation, and the resulting dynamical model is validated by comparing its simulation results to the NX Siemens software results. Finally, a fault-tolerant controller based on sliding mode control is suggested and tested in different scenarios. It is showed that the proposed control method tolerates the actuators’ faults and controls the satellite’s attitude while desaturating the reaction wheels. © IMechE 2021
  6. Keywords:
  7. Computer software ; Fault tolerance ; Flexible structures ; Flight dynamics ; Ordinary differential equations ; Satellites ; Sliding mode control ; Wheels ; Assumed mode approaches ; Fault tolerant control ; Fault tolerant controllers ; Flexible satellites ; Generalized coordinates ; Gravity gradients ; Low earth orbits ; Magnetic actuation ; Orbits
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; 2021 ; 09544100 (ISSN)
  9. URL: https://journals.sagepub.com/doi/abs/10.1177/09544100211029497