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- W2034646162 abstract "A coupled structural-electrical finite element modal formulation is employed for the control of nonlinear free vibrations of beams and composite plates. Multiple modes of the nonlinear free vibration are considered in closed-loop simulations. Two different controllers are designed and investigated for the suppression of nonlinear free vibrations. The first is the position output feedback controller comprising a linear quadratic regulator (LQR) and an extended Kalman filter (EKF). The EKF is used to consider the nonlinear state-space matrix and has a gain sequence evaluated online. The second controller is the output feedback adaptive LQR/EKF controller. This adaptive controller includes an adaptive modal frequency identification and state estimation algorithm. Numerical simulations show that the adaptive LQR/EKF controller with system identification is effective in suppressing nonlinear free vibrations of a beam and a composite plate with unpredictable sudden frequency changes. The placement of piezoelectric self-sensing actuators is based on three approaches: one is the norm of optimal feedback control gain matrix method, the second is the H 2 norm, and the last one is the norm of Kalman filter estimation gain method." @default.
- W2034646162 created "2016-06-24" @default.
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- W2034646162 date "2006-06-01" @default.
- W2034646162 modified "2023-09-23" @default.
- W2034646162 title "Adaptive Control of Nonlinear Free Vibrations of Composite Plates Using Piezoelectric Actuators" @default.
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- W2034646162 doi "https://doi.org/10.2514/1.19673" @default.
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