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ASME Press Select Proceedings
International Conference on Information Technology and Computer Science, 3rd (ITCS 2011)
V. E. Muhin
V. E. Muhin
National Technical University of Ukraine
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W. B. Hu
W. B. Hu
Wuhan University
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ASME Press
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In order to identify excavator noise sources under non-laboratory environment, noise signals in frequency domain were separated based on Independent Component Analysis (ICA). Firstly, experiments were carried out in a manufacture plant and excavator noise signals were acquired, which had been interfered with by drastic echo and background noise. Secondly, signals in time domain were transformed into frequency domain via Fourier transform (FT), so that convolution mixtures were turned into linear mixtures. Thirdly, these linear mixtures were separated into principal components by Fast fixed- point independent component analysis (FICA). Finally, a comparison of principal components and the result of Ansys modal analysis was conducted. Research shows that separation of excavator noise signals based on ICA in frequency domain is effective, and noise sources can be identified properly by comparing basic frequencies of independent components with the result of modal analysis.

I. Introduction
II. Independent Component Analysis
III. Noise Signals Test
IV. FICA of Excavator Engine Noise Signals
V. Modal Analysis
VI. Conclusions
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