Abstract: According to the problem of active control of earthquake-excited buildings structures， this paper introduces the fuzzy supervisory technique. This method has the hierarchical structure， including a controller at the high level and several sub-controllers used to reduce the story-drift. A fuzzy supervisor appropriately tunes the predesigned control gains at every moment by estimating the state of structure through the fuzzy inference mechanism. The improved seismic control performance can be achieved by converting a simply designed static gain into a real-time variable dynamic gain through a fuzzy tuning process. In the section of sub-controller design of the paper, actuators saturation state is fully considered， and a three-story of shear building structure model is given as an example. Finally the fuzzy rules applied and Matlab simulations are performed to prove the effectiveness and validity of the proposed control strategy.
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Key words: fuzzy supervisory technique, vibration control, earthquake-excited structures, actuator saturation