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A new approach to suppress spillover instability in structural vibration control
Author(s) -
Liu Wei,
Hou Zhikun
Publication year - 2004
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.30
Subject(s) - control theory (sociology) , spillover effect , modal , controller (irrigation) , vibration , instability , vibration control , cantilever , stability (learning theory)
In this paper, a new approach aiming at suppressing spillover in structural vibration control is presented. By using the null space of a modal sub‐matrix for selected modes, the higher modes neighboring the cut‐off frequency of a reduced‐order controller can be blocked from entering the feedback loop and, therefore, the control and observation spillover instability associated with these modes can be eliminated. The approach is illustrated for a cantilever plate. The performance of closed‐loop control systems using the proposed methodology and a standard ℋ 2 controller are compared. The simulation results have shown effectiveness and potentials of the proposed approach in suppressing the spillover in vibration control of large‐scale flexible systems. Copyright © 2004 John Wiley & Sons, Ltd.