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Robust and adaptable dynamic response reshaping of flexible structures

Preda, Valentin and Sanfedino, Francesco and Bennani, Samir and Boquet, Fabrice and Alazard, Daniel Robust and adaptable dynamic response reshaping of flexible structures. (2020) Journal of Sound and Vibration, 468. 1-22. ISSN 0022460X

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Official URL: https://doi.org/10.1016/j.jsv.2019.115086

Abstract

This paper outlines a complete methodology for designing a control system that reshapes the dynamic response of the flexible structure to robustly match the dynamics of a given adaptable reference model. The procedure was experimentally verified on a setup developed at the European Space Agency, consisting of a cantilevered flexible plate actuated by two shakers. Angular displacements at the free tip of the plate were measured with sub-microradian resolution using a laser autocollimator. Following a comprehensive system identification phase, mathematical models of the uncertain plant were extracted. The models reliably fit the experimental data and were used to synthesize a low order and high bandwidth structured Linear Parameter Varying controller. The controller was designed by taking into account the limits of achievable performance and the closed loop effectively constrained the flexible structure to behave like it was made out of an adaptable material. The robust stability and worst case performances were assessed by means of a structured singular value analysis and excellent agreement between theoretical predictions and experimental results was observed.

Item Type:Article
HAL Id:hal-02482454
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > ESA - ESTEC (NETHERLANDS)
Laboratory name:
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Deposited By: Daniel Alazard
Deposited On:18 Feb 2020 08:49

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