Robust direct acoustic impedance control using two microphones for mixed feedforward-feedback controller

被引：5

作者：

Volery, Maxime ^{[1
]}

Guo, Xinxin ^{[1
]}

Lissek, Herve ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Signal Proc Lab 2, CH-1015 Lausanne, Switzerland

来源：

ACTA ACUSTICA | 2023年 / 7卷 / 02期

关键词：

Active sound absorption; Electrodynamic loudspeaker; Feedback control; Feedforward control; Model uncertainty; Passivity; Pressure control; FREQUENCY ELECTROACOUSTIC ABSORBERS; SOUND; MODES;

D O I：

10.1051/aacus/2022058

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper presents an acoustic impedance control architecture for an electroacoustic absorber combining both feedforward and feedback microphone-based strategies on a current-driven loudspeaker. Feedforward systems enable good performance for direct impedance control. However, inaccuracies in the required actuator model can lead to a loss of passivity, which can cause unstable behaviour. The feedback contribution allows the absorber to better handle model errors and still achieve an accurate impedance, preserving passivity. Numerical and experimental studies were conducted to compare this new architecture against a state-of-the-art feedforward control method.

引用

页码：1130 / 1136

页数：10

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