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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23981

Title: Robust Modal Vibration Suppression of a Flexible Rotor
Authors: Hsiang-Chieh Yu;Yih-Hwang Lin;Chih-Liang Chu
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
國立臺灣海洋大學:機械與機電工程學系
Keywords: Vibrationsuppression;Robust control;Flexiblerotor;Gyroscopic effect
Date: 2007-01
Issue Date: 2011-10-20T08:09:07Z
Publisher: Mechanical Systems and Signal Processing
Abstract: abstract:This study deals with active robust modal vibration control of rotor systems supported by magnetic bearings. The inherent divergent rigid body modes are suppressed by using a dual-level control approach. Finite element method is applied to formulate the rotor model. The Timoshenko beam theory, including the effects of shearing deformations and rotary inertia, is considered in this work. Because practical control systems are often limited by its sensing, hardware, and computation speed capabilities, the reduced order approach is often used for a control system design. This study applies the independent modal space control (IMSC) approach to extract the accurate lower modes from the complex rotor systems with the gyroscopic effect considered. In practice, it is extremely difficult to model the complete dynamic characteristics of a rotor system. The model may contain unmodelled dynamics and parameter changes, which can be viewed as uncertainties of a system. As opposed to the conventional control approach, which requires fixed and accurate system parameters, this study considers robust control approach to design a controller capable of tolerating external disturbance and model uncertainties. It is demonstrated that the proposed approach is effective for vibration suppression when the system is subjected to impulsive or step loading, speed variation, and sudden loss of disk mass. (c) 2005 Elsevier Ltd. All rights reserved.
Relation: 21(1), pp.334-347
URI: http://ntour.ntou.edu.tw/handle/987654321/23981
Appears in Collections:[機械與機電工程學系] 期刊論文

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