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Structural Vibration Control Using Controllable Damping Force of Magnetorheological Fluid Based Mount

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Abstract:

This paper presents vibration control of a flexible structure using a semi-active mount operated with controllable magnetorheological (MR) fluid. A mixed-mode MR mount is designed on the basis of non-dimensional Bingham number of MR fluid, and an appropriate size of MR mount is manufactured. After experimentally evaluating the field-dependent damping force of the MR mount, a structural system consisting of a flexible beam and vibrating rigid mass is established. The governing equation of motion of the system is derived and modal analysis of the structural systems is undertaken to determine system parameters such as natural frequency. An optimal controller is then designed in the state space in order to attenuate the vibration of the structural system using LQR control algorithm and Kalman-Bucy filter (KBF). The KBF is a state estimator which is optimally considered in the statistical sense. The controller is then empirically realized and control responses such as acceleration of the structural system are evaluated in frequency domain.

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/asl.2012.3979

Publication date: July 1, 2012

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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