Nonlinear control of a flexible aeroelastic system



Jiffri, S, Paoletti, P ORCID: 0000-0001-6131-0377, Mottershead, JE ORCID: 0000-0003-1279-2562 and Cooper, JE
(2013) Nonlinear control of a flexible aeroelastic system. .

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Abstract

Although it is a common practice in the field of Dynamics to treat a system as being linear, the assumption of linearity is only valid in situations where the effect of any nonlinearities is minimal. Significant nonlinear behaviour (such as Limit Cycle Oscillations) has been observed in many practical manifestations of aeroelastic systems, highlighting the need to account for system nonlinearities. A consequence of incorporating nonlinearity into the model is that the application of linear control methods becomes inadequate when the system operates in a substantially nonlinear regime. Thus, the present work addresses both these concerns by applying nonlinear control on an aeroelastic system consisting of a flexible wing with a structural nonlinearity. The Feedback Linearisation method is employed to render the system linear, such that linear control methods are applicable. The utility of the Small Gain Theorem and Adaptive Feedback Linearisation in situations where errors in the parameters describing the nonlinearities are present is demonstrated.

Item Type: Conference or Workshop Item (Paper)
Depositing User: Symplectic Admin
Date Deposited: 28 Jan 2015 11:19
Last Modified: 03 Mar 2021 09:18
URI: https://livrepository.liverpool.ac.uk/id/eprint/2003829