Robust microvibration mitigation and pointing performance analysis for high stability spacecraft. (English) Zbl 1405.93177
Summary: This paper deals with the development of a mixed active-passive microvibration mitigation solution capable of attenuating the transmitted vibrations generated by reaction wheels to a satellite structure. A dedicated simulation environment, provided by the European Space Agency and Airbus Defence and Space industries, serves as a support for testing the proposed solution at satellite level. This paper covers modeling, control system design, and worst-case analysis for a typical satellite observation mission that requires high pointing stability. Combined with a novel disturbance model for the reaction wheel perturbations, the pointing performance and stability requirements are reformulated as bounds on the worst-case \(\mathcal{L}_2\) system gains. Subsequently, the active microvibration controller is tuned to manage the conflicting design goals and optimize different trade-offs between robustness and performance. Finally, robust stability margins and worst-case performance bounds with respect to various system uncertainties, time-varying reaction wheel spin rates, actuator saturation, and time delays are obtained using the structured singular value, integral quadratic constraints, and time-domain nonlinear simulations.
MSC:
| 93D09 | Robust stability |
| 93B35 | Sensitivity (robustness) |
| 93C95 | Application models in control theory |
| 93C15 | Control/observation systems governed by ordinary differential equations |
| 70P05 | Variable mass, rockets |
Keywords:
flexible structural dynamics; microvibrations; pointing stability; robust control; worst-case analysisReferences:
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