Modeling and controlling a semi-active nonlinear single-stage vibration isolator using intelligent inverse model of an M
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DOI 10.1007/s12206-020-0804-1
Journal of Mechanical Science and Technology 34 (9) 2020 Original Article DOI 10.1007/s12206-020-0804-1 Keywords: · Force transmissibility · Intelligent algorithm · MR damper · Nonlinear vibration isolator
Modeling and controlling a semi-active nonlinear single-stage vibration isolator using intelligent inverse model of an MR damper Seiyed Hamid Mousavi
Correspondence to: Seiyed Hamid Mousavi [email protected]
Citation: Mousavi, S. H. (2020). Modeling and controlling a semi-active nonlinear singlestage vibration isolator using intelligent inverse model of an MR damper. Journal of Mechanical Science and Technology 34 (9) (2020) 3525~3532. http://doi.org/10.1007/s12206-020-0804-1
Received December 17th, 2019 Revised
May 20th, 2020
Accepted June 22nd, 2020 † Recommended by Editor No-cheol Park
Department of Mechanical Engineering, Faculty of Enghelab, Tehran Branch, Technical and Vocational University (TVU), Iran
Abstract
Semi-active systems with variable stiffness and damping have demonstrated excellent performance. The aim of this study is to investigate the new configuration of a semiactive single-stage nonlinear vibration isolation system with a Magneto-Rheological (MR) damper to reduce the magnitude of force transmissibility over the both resonant and nonresonant regions. The magnitude of force transmissibility is widely used to performance measurement for the isolation system. In current study, to achieve this reduction, two horizontal springs and one MR damper were added to the isolator. Theoretical analysis reveals that the nonlinear system with MR damper can produce ideal vibration isolation. However, due to the nonlinear characteristics behavior of the MR damper, conventional control algorithms to reach the desired are cumbersome. To address this issue, an artificial intelligent strategy using wavelet network and fuzzy logic controller is considered to be constructed to copy the inverse dynamics of the MR damper and the nonlinear isolator. Accordingly, simulation results demonstrated that the intelligent algorithm has acceptable performance.
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Vibration isolators are devices with suitable characteristics that are often inserted between the vibrating source and the system requiring protection to reduce the level of transmitted vibration like earthquake isolator devices. In vibration isolation devices, amplitude of the transmitted force at resonance region is often decreased by introducing viscous damping. But in the nonresonant region, the amplitude of the transmitted force is increased [1]. To deal with this problem some researchers utilized nonlinear viscous damper on the singlestage linear systems [1]. Although, the analysis shows that this damper could reduce the transmitted force in the resonant region and the region very close to the resonant region but the transmitted force in the frequency ration far from the resonant region remained unch
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