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《Earthquake Engineering and Engineering Vibration》 2005-04
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Fuzzy semi-active control for civil engineering structure by using magnetorheological dampers subjected to seismic excitation

Wang Deshan~(1), Chen Shuisheng~(2), Lu Qifa~3(1.Highway Management Bureau of Shangrao Jiangxi, Shangrao 343000, China; 2.Department of Civil Engineering,East-China JiaotongUniversity, Nanchang 330013,China; 3.Consultation Center of Jiangxi Communication Engineering,Nanchang 330013,China)  
A semi-active control strategy, in which the MR dampers (magnetorheological dampers) are used as an actuator, is presented based on the fuzzy set theory. The vibration control effectiveness is analyzed for civil engineering structure subjected to seismic excitation. The proposed method has some advantage of an inherent robustness, and easiness to handle the nonlinear characteristics of the structure, because there is no longer the needs for an exact mathematical model of the structure, and need to know few input variables from the vibration sensors that will deal with the difficulty of testing response information of the structure vibration. The output of the present method is directly input to the MR damper as the input voltage and the fuzzy logical controller can be easy evaluated in the real civil engineering structure. As a numerical example, a three floors frame structure is analyzed subjected to EI Centro earthquake adopting the present method and other previous methods respectively for comparison. The research results demonstrate that the present method can get better effectiveness than both of the passive off and Passive on control, and almost the same effectiveness as LQR-clipped strategy and has very good efficiency to reduce the seismic vibration response. However, the control force of the present method is smaller than the LQR-clipped method. It means that the proposed strategy can promote the efficiency of the MR dampers.
【Fund】: 江西省自然科学基金项目(0350061)
【CateGory Index】: P315.9
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