Resumo

LARA V., LUIS A.; V. BRITO, JOSÉ L.  e  VALENCIA G., YAMILE. REDUCTION OF VIBRATIONS IN A BUILDING USING MAGNETORHEOLOGICAL DAMPERS. Dyna rev.fac.nac.minas [online]. 2012, vol.79, n.171, pp.205-214. ISSN 0012-7353.

One of the most promising device of semi-active control is the magnetorheological (MR) damper, which consists of a hydraulic cylinder, magnetic coils and a stimulate fluid called magnetorheological fluid, whose main feature is its ability to vary from a linear viscous liquid free-flowing state to a semi-solid state in just milliseconds when exposed to a magnetic field. This peculiarity makes the MR dampers an ideal tool for the control of structural systems, because with them it's possible manage damping forces in a simple, fast and secure way to a relatively low cost. This paper analyzes the structural response of a two-story building controlled by a pair of MR dampers operated by a linear quadratic regulator (LQR) associated with a algorithm developed to choose command signal of the clipped optimal controller. The results showed reductions higher than 49% and 76% of peak response and RMS values of response, respectively.

Palavras-chave : Dynamic of structures; vibration control; magnetorheological damper; LQR control..

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