Finite element model for the aeroelasticity analysis of hypersonic panels: III. Flutter suppression

Ji Yao Shen; Lonnie Sharpe Jr.

doi:10.1117/12.276550

13 June 1997 Finite element model for the aeroelasticity analysis of hypersonic panels: III. Flutter suppression

Ji Yao Shen, Lonnie Sharpe Jr.

Proceedings Volume 3039, Smart Structures and Materials 1997: Mathematics and Control in Smart Structures; (1997) https://doi.org/10.1117/12.276550
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

A finite element model for aeroelasticity analysis of hypersonic panels, using a 9 degree-of-freedom discrete Kirchhoff Theory triangular element along with a 6 d.o.f inplane membrane element, had been developed in authors' previous work, and this model had been sued for the determination of flutter boundary. This paper intends to develop an optimal control strategy to suppress the panel flutter using piezoelectric material as actuators. Two pieces of piezoelectric patches are bonded at the both sides of the panel symmetrically. The actuator pair is assumed such that one laminate contracts, another expands, to create bending control moment. The original finite element model is modified to include the piezoelectric patches' effect. A modal reduction technique is used to reduce the number of modes involved, and to simplify the nonlinearity of the model. A quasi-linear optimal control approach is applied for optimal control design. Numerical result shows that active piezoactuator controller effectively delays the flutter to a relatively higher dynamic pressure.

Citation Download Citation

Ji Yao Shen and Lonnie Sharpe Jr. "Finite element model for the aeroelasticity analysis of hypersonic panels: III. Flutter suppression", Proc. SPIE 3039, Smart Structures and Materials 1997: Mathematics and Control in Smart Structures, (13 June 1997); https://doi.org/10.1117/12.276550

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