ANALYSIS SYSTEM OF TRANSFER PATH FOR VIBRATION/NOISE AND ANALYSIS METHOD OF TRANSFER PATH FOR VIBRATION/NOISE

摘要

PURPOSE: Interpretation system and method of the vibration and noise transfer paths are provided to accurately interpret the property of the transfer path and the definition of the noise and vibration sources of the measurement target using the multi-dimensional spectral interpretation technique. CONSTITUTION: An interpretation system of the vibration and noise transfer paths comprises an auto-power spectrum and cross-power spectrum calculating unit(300), a coherence calculating unit(400), a partial and multiple coherence calculating unit(600) and a coherence output spectrum calculating unit(800). The auto-power spectrum and cross-power spectrum calculating unit calculates the auto power spectrum and the cross-power spectrum of the vibration and noise of the target. The coherence calculating unit calculates the linear dependence between the pressure and the output of the vibration and the noise. The partial and multiple coherence calculating unit eliminates the correlation between the input and the output of the vibration and the noise. The partial and multiple coherence calculating unit calculate a partial and a multiple coherence functions. The coherence output spectrum calculating unit calculates the coherence output spectrum of the noise and the vibration. The coherence output spectrum calculating unit determines the coherence rank.