Active Vibration Control to Intelligent Plate Based on Ｈ_∞ Theory
Wang Xiaobing,Chen Jianjun,Gao Wei,Du Lei,Ma Fang
(School of Electronic and Mechanical Engineering, Xidian University, Xi'an 710071)

Abstract: A method to control an intelligent plate vibration is proposed based on Ｈ_∞ theory. For an intelligent plate with piezoceramics slices attached on both surfaces, an element model with 12 DOFs and 2 electrical DOFs is adopted and the dynamics differential equations are deduced by means of Hamilton pr inciple, and whose order is lowered in state space by modal truncation, minimal realization and balancing xeduction. A dynamic output feedback controller is designed to control the original intelligent plate vibration. Taken intelligent cantilever plate as an example, the conclusion is confirmed and the process error is estimated, the corresponding dynamic output feedback controller is obtai ned to simulate the control performance.
Keywords: intelligent plate, modal truncation, minimal realization, balancing reduction, control law.