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Transfer path analysis in the design of active control system

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Fábio Xavier de Melo
Total Authors: 1
Document type: Master's Dissertation
Press: São Carlos.
Institution: Universidade de São Paulo (USP). Escola de Engenharia de São Carlos
Defense date:
Examining board members:
Leopoldo Pisanelli Rodrigues de Oliveira; Vicente Lopes Júnior; Paulo Sergio Varoto
Advisor: Leopoldo Pisanelli Rodrigues de Oliveira

The Transfer Path Analysis (TPA) is a group of numerical/experimental tools for the analysis and troubleshooting of noise and vibration problems in linear time invariant vibroacoustic systems, being the automotive sector its major user. TPA consists of a numerical/experimental analysis that allows the identification of the main noise and vibration sources and the structural/acoustic transfer paths to the Target points. Based on the sources and paths, it is possible to propose modifications that efficiently minimize noise and vibration at the target positions. By means of active control it is possible to modify noise and vibration in order to change, rather than minimize noise and vibration, achieving certain design targets. This work presents a numerical and experimental study of TPA techniques, using direct and inverse operational loads determination methods. These studies were performed on a vehicle mockup, in order to determine the path of greatest contribution to the noise inside the prototype, and from this result, propose an active control system to minimize this internal noise. (AU)

FAPESP's process: 11/04815-3 - Transfer path analysis in the design of active control systems
Grantee:Fábio Xavier de Melo
Support type: Scholarships in Brazil - Master