Abstract
In high performance active vibration control for a flexible structure, it is requirement to establish an accurate model identified not only 1 but also 2 and 3 vibration modes of the flexible structure. This paper presents the derivation method of a modal model of flexible structures based on the advanced system identification theory. In this identification, multi-decimation(MD) operation is applied to identify wide frequency region in a short vibration time accurately. By using circle curve fitting on each identified mode, one modal model can be derived from MD identified models. We apply the proposed identification method to the three-story structure, and we show the effectiveness of the proposed method through both the identification and the vibration control experiments.
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