Compressor Shell Vibration Estimation Using Sound Field Measurements from Microphone Arrays
Acoustic transfer vector (ATV) is a good method to estimate the sound field near noise sources using vibration measurements as input data for the numerical model.In an inverse way,this technique can identify and quantify noise sources using measured acoustic pressure in a grid of field points.The process consists of inverting the ATV matrix;witch consists of relations between the numerical mesh vibrations and the grid point pressure,using Singular Value Decomposition (SVD).The key task on the process is the selection of the regularization parameter used in the Truncated SVD.The choice of this regularization parameter is a trade off between error reducing and loss of information.Therefore,very small singular values are dropped and small errors on pressure measurements do not result in huge errors on the solution.On the other hand,if many singular values are dropped too much loss of information occurs and results will not be correct.This paper shows microphone array measurements used in the Inverse ATV tool to locate noise sources on the compressor shell at some frequencies.
Compressor shell Vibration measurement
Alisson Luiz Roman Ot(a)vio Santini Jr. Edmar Baars
R&D Department,EMBRACO P.O.Box 91,89219-901 Joinville,SC,BRAZIL
国际会议
第六届压缩机与制冷国际会议(The 6th International Conference on Compressor and Refrigeration(ICCR))
西安
英文
235-241
2008-09-25（万方平台首次上网日期，不代表论文的发表时间）