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http://dx.doi.org/10.11112/jksmi.2013.17.6.061

Characteristics and Dynamic Modeling of MR Damper for Semi-active Vibration Control  

Heo, Gwang-Hee (건양대학교 건설환경공학과)
Jeon, Seung-Gon (충남대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.17, no.6, 2013 , pp. 61-69 More about this Journal
Abstract
This research is aimed to evaluate characteristics and dynamic modeling of MR damper for semi-active vibration control. A MR damper of semi-active type was designed and made for the purpose of controlling the vibration of a real-size model structure. Usually a semi-active control system equipped with a MR damper requires a dynamic model which expresses numerical data about the damping capacity and dynamic characteristics generated by a MR damper. To fulfil the requirement, a Power model and a Bingham model were particularly employed among many dynamic models of MR damper. Those models being contrasted with other ones, a dynamic test was carried out on the developed MR damper. In the test, excitation frequencies were conditioned to be 0.15 Hz, 1.0 Hz, and 2.0 Hz, and three different currents were adopted for each frequency. From these test results, it was found that displacement affected control capacity of the MR damper. The test results led to the identification of model variables for each dynamic model, on the basis of which a force-speed relation curve and expected damping force were derived and contrasted to those of the developed MR damper. Therefore, it was proven that the MR damper designed and made in this research was effective as a semi-active controller, and also that displacement of 2mm at minimum was found to be secured for vibration control, through the test using various displacements.
Keywords
Semi-active; MR damper; Dynamic modeling; Power model; Bingham model;
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Times Cited By KSCI : 1  (Citation Analysis)
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