Design of a receptance-based active aeroelastic controller in the presence of parametric uncertainties

Resumo

© 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018. All rights reserved.This paper presents a numerical investigation of the effects of parametric uncertainties propagated through Polynomial Chaos Expansion on the design of a Receptance-based active controller for aeroelastic systems. The test-case is representative of an experimental rig featuring a subsonic flexible wing with multiple control surfaces. The uncertainty is introduced in the Young's modulus of the main spar. Such uncertainty is firstly propagated to assess the open loop behavior of the aeroelastic system in terms of flutter velocity and frequency responses. A Receptance-based controller is then designed deterministically with the goal of increasing the flutter boundary and its performance is tested against the uncertain aeroelastic system. Finally, the PDFs of the receptance control gains are evaluated and discussed.

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