Fixed Thrust Optimal-Fuzzy Combined Control for Spacecraft Formation Flying

DOI Web Site Web Site 14 References
  • WANG Pengji
    Department of Space Engineering and Mechanics, Harbin Institute of Technology
  • ZHAO Xueping
    Discipline of Control Theory and Engineering, College of Electrical Engineering, Zhengzhou University
  • YANG Di
    Department of Space Engineering and Mechanics, Harbin Institute of Technology

Search this article

Abstract

The fixed thrust optimal-fuzzy combined formation control method is mainly studied for spacecraft formation flying in circular orbits based on two-body relative dynamics. The linear Hill’s equation is used in relative dynamics, and the circular formation in three dimensions is designed. In fuzzy control, relative position, velocity and acceleration errors are selected as fuzzy variables and the multiplication and weighted average principle are introduced into fuzzy inference so as to maximize the reduction of the coupling effect. And since J2 perturbation is known, it will be taken into account effectively in fuzzy control method. In time-fuel optimal control, the simplified relative error model is used and an optimal controller is provided through the minimum principle. Thus, this paper combines both controls above to form the optimal-fuzzy formation control. Optimal control is adopted when relative position errors reach a certain threshold, while fuzzy control works for the small errors lower than that threshold. Finally, to take circular formation as an example, the simulation results demonstrate that not only does the optimal-fuzzy combined control system have a good response performance, but also excels in fuel consumption.

Journal

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top