矩形平板の振動放射音を対象としたクラスタード・アクティブノイズコントロール(機械力学,計測,自動制御)

概要

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Using cluster control, this paper presents active noise control of structure-borne sound radiating from a vibrating rectangular plate. Cluster control consisting of both cluster filtering and cluster actuation enables the suppression of a target cluster without causing a spillover of any clusters. It is the purpose of this paper to apply the cluster control to a conventional active noise control, thereby permitting one to independently suppress the noise grouped into a finite number of clusters. ln the latest research, it is shown that when a rectangular plate is targeted, acoustic cluster filtering can be realized using just 4 microphones. This paper, then, presents a method of acoustic cluster actuation, a counterpart of the acoustic cluster filtering, that may activate only the target cluster, and hence its capability is verified mathematically and experimentally. Moreover, by applying the cluster control to active noise control, a novel clustered-active noise control is proposed, the fundamental properties being clarified. Finally, experimental results targeting a rectangular plate are shown, demonstrating the validity of the clustered-active noise control for suppressing structure-borne sound.
社団法人日本機械学会の論文
2003-08-25