塔状構造物の多自由度系モデル作成法と振動制御

概要

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This paper proposes the modeling method of multi-degree-of-freedom system like a tower structure, and the design method using the hybrid dynamic absorber and LQ control theory for controlling the vibrations of the multi-degree-of freedom system. The first vibration mode is the most important to control vibrations of a tower structure, because of exciting most sensitively by strong wind. Therefore, as a structure is higher and higher, it is necessary to control the higher order vibration modes, considering to prevent spillover instability. In this paper, the unobservability is used for making reduced-order-model, and the LQ control theory is used for controller design. For vibration control using a hybrid dynamic absorber, reduced-order-model of two-degree-of-freedom system, is made at the nodes of third vibration mode to prevent spillover instability. And using root locus plot, it will be clear that the relationship between weighting parameters and control effect in LQ control theory. It is demonstrated experimentally that the hybrid dynamic absorber, designed by this method is able to control first and second vibration modes well without the spillover instability.
社団法人日本機械学会の論文
1994-05-25