集中系モデルを用いた状態フィードバックに基づく能動騒音制御(音響機器を含む1次元音響空間のモデルベース制御)

Translated title of the contribution: Active noise control based on state feedback by concentrated mass model (Model based control for one-dimensional acoustic space and loudspeaker)

久野 翔太郎, 石川 諭, 雉本 信哉, 木庭 洋介

Research output: Contribution to journalArticlepeer-review

Abstract

We herein propose a new model-based control method, in place of traditional adaptive control, for a low-frequency noise problem in a closed space. The proposed control method is based on state feedback control and a model of the acoustic space obtained by the concentrated mass model. Thus, we can control noise in the entire space. According to the concentrated mass model, the acoustic space is modeled as masses, connecting linear springs, connecting dampers, and base support dampers. Furthermore, a loudspeaker, as a control source, is also modeled by a mass, a spring, and a damper. In the present paper, as a first step, we constructed a coupled analysis model of a one-dimensional acoustic space and the loudspeaker. We designed the model-based control system for the standing sound wave in the low-frequency band. Specifically, we realized a state feedback control system based on a Kalman filter and pole placement. Modal reduction using modal analysis is conducted to reduce the computation time of the controller. Then, we conducted experiments and a numerical simulation of the one-dimensional sound tube to confirm the validity of the analysis model. Moreover, we perform an experiment to control the noise in the sound tube. The noise is reduced around the resonance frequency in the entire space. Therefore, the proposed method is valid for noise control in a closed space.
Translated title of the contributionActive noise control based on state feedback by concentrated mass model (Model based control for one-dimensional acoustic space and loudspeaker)
Original languageJapanese
Pages (from-to)14-00485-14-00485
Journal日本機械学会論文集
Volume81
Issue number822
DOIs
Publication statusPublished - 2015

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