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논문 기본 정보

자료유형
학술저널
저자정보
Beheshti-Aval, S.B. (Department of Civil Engineering, Khajeh Nasir Toosi University of Technology [KNTU]) Lezgy-Nazargah, M. (Department of Civil Engineering, Khajeh Nasir Toosi University of Technology [KNTU])
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제6권 제8호
발행연도
2010.1
수록면
921 - 938 (18page)

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Most of studies on control of beams containing piezoelectric sensors and actuators have been based on linear quadratic regulator (LQR) with state feedback or output feedback law. The aim of this study is to develop velocity-acceleration feedback law in the optimal control of smart piezoelectric beams. A new controller which is an optimal control system with velocity-acceleration feedback is presented. In finite element modeling of the beam, the variation of mechanical displacement through the thickness is modeled by a sinus model that ensures inter-laminar continuity of shear stress at the layer interfaces as well as the boundary conditions on the upper and lower surfaces of the beam. In addition to mechanical degrees of freedom, one electric potential degree of freedom is considered for each piezoelectric element layer. The efficiency of this control strategy is evaluated by applying to an aluminum cantilever beam under different loading conditions. Numerical simulations show that this new control scheme is almost as efficient as an optimal control system with state feedback. However, inclusion of the acceleration in the control algorithm increases practical value of a system due to easier and more accurate measurement of accelerations.

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