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Attitude control of satellites with flexible appendages: a structured H infinity control design

Loquen, Thomas and De Plinval, Henry and Cumer, Christelle and Alazard, Daniel Attitude control of satellites with flexible appendages: a structured H infinity control design. (2012) In: AIAA Guidance, Navigation, and Control Conference, 13-16 Aug 2012, Minneaoplis, United States .

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Official URL: http://dx.doi.org/10.2514/6.2012-4845

Abstract

In this paper, the modeling of flexible multi-body systems (typically a satellite), the design of a reduced-order robust controller and the closed-loop system robustness analysis are considered. First, we present a generic tool developed to build the model of a multi- body dynamic system taking into account parametric uncertainties for robust control and analysis purpose. Satellites are typically composed of a main body (hub of the satellite) and cantilevered appendages (flexible or not). Based on the description of each element(mechanical and geometrical properties, uncertain parameters ...), a linear model between torques applied to the hub (control or perturbation inputs) and angular accelerations is built using the Linear Fractional Representation framework. Second, based on this model, a control design method is proposed: from a basic standard scheme and the latest H_infinity solver, a low order H1 controller can be derived. Roll-off requirements and worst-case parametric configurations can also be taken into account in a multi-model design approach. Third, robustness analysis of the design on the full order model is considered. A numerical example illustrate the relevance and effectiveness of the proposed approach.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to American Institute of Aeronautics and Astronautics editor. This paper appaears in http://arc.aiaa.org/doi/abs/10.2514/6.2012-4845
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
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Deposited By: Daniel Alazard
Deposited On:29 Jan 2013 15:29

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