This paper addresses the attitude tracking control problem for spacecraft with unknown inertia parameters and sign errors in actuator response that are uncertain in occurring time instants and patterns. Either a software or hardware error may cause actuation sign errors, which may lead spacecraft to fail. A new multiple-model adaptive control scheme is developed to compensate the uncertainties of actuation sign errors and inertia parameters, which ensures the desired system global stability and asymptotic attitude tracking properties. Such a control scheme employs a set of adaptive estimators to generate parameter estimates, estimator states, and estimation errors, in which the uncertainties of inertia parameters are parameterized. Then, a set of control signals are designed by using such estimates and estimation errors, and a switching mechanism is established based on calculating multiple cost functions from the estimation errors to select the most appropriate control signal with the minimum cost function as the applied control signal. Simulation results of an application to a spacecraft model with four reaction wheels and comparison of results with a Nussbaum gain-based control design verify the effectiveness of the proposed control scheme.
Multiple-Model Adaptive Control for Spacecraft Under Sign Errors in Actuator Response
Journal of Guidance, Control, and Dynamics ; 39 , 3 ; 628-641
2015-07-29
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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