Active Noise Attenuation Using Lqg/ltr Control

José Paulo F. Garcia; Edson S. Bortoloto; Jean Marcos S. Ribeiro; Lizete Maria Crnkowise Fernandes Garcia

doi:10.18618/REP.2004.2.023027

Authors

José Paulo F. Garcia UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil
Edson S. Bortoloto UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil
Jean Marcos S. Ribeiro UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil
Lizete Maria Crnkowise Fernandes Garcia UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil

DOI:

https://doi.org/10.18618/REP.2004.2.023027

Keywords:

Active noise control, LQG/LTR control, stability robustness

Abstract

This paper presents a control system design for active noise cancellation using “Linear Quadratic Gaussian / Loop Transfer Recovery” (LQG/LTR). An implementation by an equipment like a headset is proposed, where both active and passive attenuation techniques are used. In this paper, the active technique is applied to attenuate low-frequency acoustic noise. The design objective is not only the active attenuation of acoustic noise, but also the sound audition at frequency band of the human voice. Results obtained from digital simulations are presented, which is considering the existence of a noise in the environment located near the turbine in a hydroelectric plant. In this noisy environment, the noise is attenuated and the equipment allows the user to hear human voices.

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Author Biographies

José Paulo F. Garcia, UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil

received his B.Sc. degree from the State University of São Paulo (UNESP), Ilha Solteira, Brazil, a M.Sc. degree from the Federal University of Santa Maria (UFSM), Brazil, and Ph.D. degree from de University of São Paulo (USP), São Paulo, Brazil, all in Electrical Engineering. He has been with Department of Electrical Engineering/UNESP/Ilha Solteira since 1987, where he has been teaching electrical machines and control systems courses for both graduate and undergraduate students. His research interest includes high performance drives and control theory and application. He is a member of Brazilian Society of Automatic Control.

Edson S. Bortoloto, UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil

received his B.Sc. and M.Sc. degree from the State University of São Paulo (UNESP), Ilha Solteira, Brazil, in Electrical Engineering. His reserch interest includes active noise control.

Jean Marcos S. Ribeiro, UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil

received his B.Sc. and M.Sc. degree from the State University of São Paulo (UNESP), Ilha Solteira, Brazil, in Electrical Engineering. He has concluding your Ph.D. degree from State University of São Paulo (UNESP), Ilha Solteira, Brazil, in Electrical Engineering. His research interest includes control theory and industry application.

Lizete Maria Crnkowise Fernandes Garcia, UNESP - State University of São Paulo Department of Electrical Engineering ZIP - 15385-000 - P.O. Box 31 – Ilha Solteira - SP – Brazil

received his B.Sc. degree from the Federal University of São Carlos (UFsCar), Brazil, in mathematical area, a M.Sc. degree from University of São Paulo (USP), São Carlos, Brazil, in mathematical area and Ph.D. degree from de University of São Paulo (USP), São Paulo, Brazil, in Electrical Engineering. She has been with Department of Mathematics / UNESP/ Ilha Solteira since 1986, where he has been teaching mathematics courses for graduate students. Her research interest is control theory and mathematics theory and application.

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