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http://dx.doi.org/10.5139/JKSAS.2006.34.9.045

Nonlinear Control by Feedback Linearization for Panel Flutter at Elevated Temperature  

문성환 (서울교육대학교)
이광주 (한국기술교육대학교)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.34, no.9, 2006 , pp. 45-52 More about this Journal
Abstract
In this study, a nonlinear control by feedback linearization method, one of nonlinear control schemes based on the nonlinear model, is proposed to suppress the flutter of a supersonic composite panel using piezoelectric materials. Most of the previous panel flutter controllers are the LQR(Linear Quadratic Regulator) which is based on the linear model. A nonlinear feedback linearizing controller proposed in this study considers the nonlinear characteristics of the system model. We use the actuator implemented by piezoceramic PZT. Using the principle of virtual displacements and a finite element discretization with the conforming four-node rectangular element, we first derive the discretized dynamic equations of motion, which are transformed into a nonlinear coupled-modal equations of motion of state space form. The effectiveness of the proposed method is also compared with the LQR based on the linear model through numerical simulations in the time domain using the Newmark method.
Keywords
Panel flutter; Feedback linearization; Nonlinear control; Piezoelectric material;
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