Intelligent Vibration Isolation and Mitigation of a Platform by Using MR and VE Devices
Publication: Journal of Aerospace Engineering
Volume 29, Issue 4
Abstract
The vibration isolation and mitigation of a platform, such as aerospace or precision instrument platforms, is an important research topic. However, previous studies only address high-frequency excitations; they disregard the control effect of low-frequency excitations. Thus, a new vibration control scheme for a platform is proposed to reduce the dynamic responses of a platform that is subjected to wide-frequency excitations, which range from 0 to 500 Hz, using vibration isolation and mitigation devices, magnetorheological (MR) dampers, and viscoelastic (VE) dampers. The motion equations of a complex dynamic system with these three different types of dampers are deduced considering seven degree-of-freedom coupling vibration. The idea of multistate control is adopted to control the inputting currents of the MR damper, and the dynamic responses of the platform to sinusoidal excitation, white noise excitation, and load spectrum excitation are calculated, respectively. The analysis results indicate that the proposed vibration control scheme is effective and suitable for vibration control of the platform.
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Acknowledgments
This study was financially supported by the Natural Science Foundation of Jiangsu Province with grant number BK20140025, National Natural Science Foundation of China with grant number 11572088, Key Research and Development Plan of Jiangsu Province with grant number BE2015158, National Key Basic Research 973 Program, Natural Science Foundation of Jiangsu Province with grant number BK20141086, Science and Technological Innovation Leading Young Talents Program of the Ministry of Science and Technology, Research and Innovation Project for College Graduates of Jiangsu Province with grant number KYLX15_0088, A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions. These supports are gratefully acknowledged.
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Published In
Journal of Aerospace Engineering
Volume 29 • Issue 4 • July 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 10, 2014
Accepted: Nov 17, 2015
Published online: Jan 19, 2016
Discussion open until: Jun 19, 2016
Published in print: Jul 1, 2016
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