2008•Journal of Zhejiang University(Engineering Science)Requires access
Active vibration control based on linear matrix inequality for rotor system under seismic excitation
Changsheng Zhu
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Abstract
H2,H∞ and mixed H2/H∞ state feedback control strategies for the rotor system under seismic excitation were developed by linear matrix inequality(LMI) to attenuate the transient vibration of the rotor system under random excitation and make it robust.Active vibration control of the rotor system under seismic excitation was investigated by using Matlab LMI tools.Characteristics of the rotor system under nonstationary El Centro earthquake excitation in both frequency and time domains were analyzed.The feasibility and effectiveness of the control strategies presented in active vibration control for the rotor system under seismic excitation were verified.The mixed H2/H∞ control strategy can effectively suppress the transient vibration of the rotor system and make it maintain good robust performance.Characteristics of the rotor system in both frequency and time domain were improved.