117 時間変動系の固有振動数追跡に関する研究(システム同定,OS-9 モード解析とその応用関連技術,総合テーマ「伝統を,未来へ!」)

概要

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In is very important to understand the dynamic characteristics to control vibrations of machinery. Generally, the conventional identification methods for experimental modal analysis are employed to time-invariant systems. However, there are a lot of requirements to extract modal parameters of time-varying systems. It is hard to implement the vibration testing for time-varying systems, because of excitation difficulties, boundary conditions, etc. In this paper, the subspace algorithm is proposed to obtain natural frequencies of time-varying systems. Then, a combination procedure of SVD and QR decomposition is proposed for the identification algorithm to improve computational load. The effectiveness of the proposed time-varying identification algorithm is verified by numerical results. Finally, the procedure is applied to an experimental manipulator model.
一般社団法人日本機械学会の論文
2010-09-14