Model reduction using BPOD and its application to aeroelastic active control
Journal Title: Science Paper Online - Year 2008, Vol 3, Issue 10
Abstract
It is badly limited to apply optimization and control into fluid dynamic system as its high-dimensional and nonlinear characteristic. Model reduction technique is a powerful tool to solve the problem. In this paper, the balanced proper orthogonal decomposition (BPOD) which is combined POD with balance truncation theory is applied to aeroservoelastic model reduction. The POD snapshot is used to obtain approximations to the system controllability and observability gramians. The approximations are then applied to obtain balanced reduced-order model. For a two-dimensional airfoil aeroelastic system, the unsteady aerodynamic reduced-order model and then the reduced aeroelastic model are constructed by BPOD method. Finally, an active control law is designed for the reduced-order system to suppress the airfoil flutter via the control surface deflection. The numerical results show that the BPOD reduced-order model can accurately simulate the high-dimensional nonlinear fluid dynamic system and effectively apply to aeroelastic active control.
Authors and Affiliations
XU Min CHEN Shilu
Keywords
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