Selective modal control for vibration reduction in flexible structures

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• 作者：Giacomo Canciello ^{giacomo.canciello@unina2.it}Author Vitae ; Alberto Cavallo ^{alberto.cavallo@unina2.it}Author Vitae
• 关键词：Large scale optimization problems and methods ; Vibration control for flexible structures ; Optimization-based controller synthesis ; Infinite-dimensional systems ; Identification methods
• 刊名：Automatica
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：75
• 期：Complete
• 页码：282-287
• 全文大小：798 K
• 卷排序：75

文摘

The design of a controller for selective reduction of vibrations in flexible low-damped structures is presented. The objective of the active feedback control law is to increase damping of selected modes only, in frequency regions where a disturbance is likely to produce largest effect. Moreover, the stabilizing controller is required to be band-pass, in order to filter out high-frequency sensor noise and low-frequency accelerometer drift, and stable to increase robustness to uncertain parameters. The control design is based on the Inverse Optimal Design approach, through the solution of a matrix Stein equation, resulting in the solution of an optimal H∞H∞ control problem. A grey-box identification approach of the authors is employed for obtaining the model from experimental data or from detailed Finite Element Model (FEM) simulators. The problem of optimal actuator/sensor location is also addressed. Detailed simulation results are provided to show the effectiveness of the strategy.