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Low Order Modeling of an Acoustic Path for Active Noise Control and Design Method of Feedback Control

Article of Honda R&D Technical Review Vol.12 No.1

Summary

In order to reduce the cost of active noise reduction (ANC), this research focused on feedback (FB) control, which characteristically does by not require reference signal sensors. The purpose of this paper is low order modeling of acoustic transfer characteristic (plant) between a control noise source and an error sensor arranged at the control point; and, the designing of a controller based on the results. Specifically, this entails constructing as simple an FB-ANC system as possible (a 1 input/1 output system), then investigating the noise reduction performance of that system. First, the authors employed physical modeling in order to model the plant in the lowest possible order. In addition, Smith predictor-FB-ANC is presented, and FBANC based on PID (Proportional Integral Derivative) control is designed for the low-order plant model obtained. Finally, the validity of these results is demonstrated with computer simulation using actual data.

Reference

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Author (organization or company)

Hisashi SANO(Tochigi R&D Center)、Shuichi ADACHI(Utsunomiya University)

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