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Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2012.tde-25092012-204752
Document
Author
Full name
Jaime Alberto Mosquera Sanchez
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2012
Supervisor
Committee
Oliveira, Leopoldo Pisanelli Rodrigues de (President)
Arruda, José Roberto de França
Varoto, Paulo Sergio
Title in Portuguese
Controle ativo acústico estrutural: projeto, simulação e análise de qualidade sonora
Keywords in Portuguese
Controle ativo acústico estrutural
Controle ativo de qualidade sonora
Distúrbio harmônico
Psico-acústica
Abstract in Portuguese
Este documento trata do estudo de sistemas de controle de ruído e qualidade sonora em aplicações próprias da indústria da mobilidade, e da avaliação inovadora do seu desempenho com base em métricas da psico-acústica relevantes para esta área como Loudness, Roughness e Tonality. Uma metodologia de projeto e implantação de sistemas de controle ativo com base em métricas da psico-acústica é estabelecida. Os desafios se encontram, primeiramente, na definição do conjunto de atributos temporais e espectrais do distúrbio de entrada, responsável pelas condições auditivas indesejáveis que são identificados a partir da análise da emissão acústica sintetizada de um motor de combustão interna de um veículo automotivo. Algoritmos e metodologias computacionais são usados de forma extensiva para simulação e análise, integrando as áreas de projeto de sistemas de controle e psico-acústica. Um algoritmo adaptativo de controle de qualidade sonora é desenvolvido para solucionar problemas gerados pela interação em amplitude e/ou fase relativa das componentes de banda estreita em distúrbios de característica harmônica. Finalmente, os conceitos avaliados de forma numérica são validados experimentalmente, permitindo não só a análise critica do desempenho psico-acústico dos controladores, como também da própria metodologia de projeto adotada, o que é realizado com auxílio de um mock-up de um veículo automotivo sujeito a distúrbios de características psico-acústicas relevantes para o problema proposto.
Title in English
Active structural acoustic control: design, simulation and analysis of sound quality
Keywords in English
Active sound quality control
Active structural acoustic control
Harmonic disturb
Psychoacoustics
Abstract in English
This master thesis deals with the study of active noise and sound quality control systems in automotive applications, and the innovative assessment of their performance based on relevant psychoacoustic metrics in this area such as Loudness, Roughness and Tonality. A methodology for designing and implementing active control systems based on psychoacoustic metrics is established. The main challenges reside in defining the set of time-frequency attributes of the disturbance, responsible for the undesirable auditory stimuli. Computer algorithms are used extensively for simulating and analyzing the disturbance, which is a synthesized internal combustion engine noise, integrating both the control system design and psychoacoustics areas. An adaptive active sound quality control algorithm is proposed to resolve the amplitude and/or relative phase interactions among the narrowband components of the multi-harmonic disturbance. Eventually, the numerical results are correlated with real experiments, allowing not only a critical analysis of the psychoacoustic performance of the controllers, but also of the proposed design methodology, which is accomplished with the aid of a vehicle's mock-up, subject to disturbances of relevant psychoacoustic characteristics to the proposed problem.
 
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This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2012-10-11
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • MOSQUERA-SANCHEZ, J. A., et al. Multi-Harmonic Adaptive Control for Roughness. In 14th International Symposium on Dynamic Problems of Mechanics (DINAME2011), 14, Maresias, 2011. Rio de Janeiro : Associação Brasileira de Engenharia e Ciências Mecânicas, 2011.
  • MOSQUERA-SANCHEZ, J. A., and OLIVEIRA, L. P. R.. An Adaptive Controller for Amplitude and Relative Phase Control of Periodic Disturbance. In International Conference on Noise and Vibration Engineering (ISMA), 2012, Leuven, 2012. Leuven : Katholieke Universiteit Leuven, 2012.
  • MOSQUERA-SANCHEZ, J. A., and OLIVEIRA, L. P. R.. Frequency-Domain Delayless Adaptive Control for Roughness. In 18th International Congress on Sound & Vibration (ICSV18), 18, Rio de Janeiro, 2012. Rio de Janeiro : The International Institute of Acoustics and Vibration, 2012.
  • OLIVEIRA, L. P. R., et al. Sound Quality Scattering due to Vibro-acoustic Model Variability. In Uncertainties2012, Maresias, 2012. Rio de Janeiro : Associação Brasileira de Engenharia e Ciências Mecânicas, 2012.
  • OLIVEIRA, L. P. R., and MOSQUERA-SANCHEZ, J. A.. Frequency-domain delayless adaptive control of Roughness. In International Congress and Exposition on Noise Control Engineering (INTERNOISE), 2012, New York, 2012. New York : Institute of Noise Control Engineering of the USA, 2012.
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