A single-input two-output feedback formulation for ANC problems

Author

Toochinda, V. ; Klawitter, T. ; Hollot, C.V. ; Chait, Y

Author_Institution

MIE Dept., Massachusetts Univ., Amherst, MA, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

923

Abstract

This paper explores inherent feedback limitations of active noise control in ducts by using a single-input, two-output framework and observing properties of closed-loop transfer functions. Performance is assessed using the plant and disturbance alignment angle. We show that the sound levels at the measurement microphone axe amplified when attenuating acoustic energy at the error microphone. We also show that the stability margins can be improved over feedforward control using measurements from two sensors

Keywords

active noise control; closed loop systems; feedback; stability criteria; transfer functions; ANC problems; acoustic energy attenuation; active noise control; amplification; closed-loop transfer functions; disturbance alignment angle; ducts; error microphone; inherent feedback limitations; measurement microphone; plant alignment angle; single-input two-output feedback formulation; stability margins; Acoustic measurements; Acoustic noise; Active noise reduction; Attenuation measurement; Ducts; Energy measurement; Feedback; Microphones; Stability; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2001. Proceedings of the 2001

Conference_Location

Arlington, VA

ISSN

0743-1619

Print_ISBN

0-7803-6495-3

Type

conf

DOI

10.1109/ACC.2001.945837

Filename

945837