Reaction wheels are commonly used to provide precision control for spacecraft that require fine pointing. However, vibration disturbances from the mechanical structure of reaction wheels such as stiction and resonance can cause attitude errors that are difficult to compensate. By using an optimal reaction wheel control that keeps the wheel speeds away from the disturbance-related wheel speeds, the effects of these disturbances can be minimized. This paper proposes an optimal control algorithm for reaction wheel assemblies with four or more wheels that minimizes the impact of stiction and resonance by implementing an intelligent wheel torque distribution algorithm. The null space provided by redundant wheels is utilized as an extra degree of freedom for controlling the wheel speeds. The formulated optimization problem is solved by Particle Swarm Optimization (PSO) and the numerical simulations of a 4-wheel spacecraft are carried out to validate the proposed algorithm.
Optimal Reaction Wheel Control with Stiction and Resonance Avoidance
Springer Aerospace Techn.
2022-03-16
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
On Stiction, Limit And Constraint Avoidance for Reaction Wheel Control
British Library Conference Proceedings | 2010
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