313 評価点の移動する1次元音場内の能動的音響制御 : 2次経路同定における時間遅れ分離法の提案(能動振動・音響制御,OS-19 音響・振動)

概要

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Active noise control of a moving point has been examined in our previous papers. The feature of the model is that the transfer characteristics between the noise control source and the evaluation point (aimed noise reduction point) change with the movement of the evaluation point. However, the convergent algorithm used in the identification works effectively only when the system is stationary, and this is one of the reasons that the identification accuracy decreases with the increase of speed of the evaluation point. We propose new technique where transfer characteristics are divided into time delay factor and main components. The change of transfer characteristics caused by the movement appears mostly in time delay factor, and since it is the function of the location, there is no need to identify it. This method is examined numerically and experimentally in this paper.
一般社団法人日本機械学会の論文
2004-09-27