Influence of Window Width Selection in Fault Diagnosis of Loudspeaker Based on Short-time Fourier Transform
It is important that selects window function and width to Short-time Fourier Transform(STFT). Especially, when diagnosing fault loudspeaker, the different analysis window function and width can influent the result of analysis on respond signal of loudspeaker. So, it proposed a selecting analysis window function and width method based on the energy correction factor, the maximum side lobe and main lobe peak value in the frequency domain. Through reasonable selecting analysis window function and width, it can reduce the influence of truncation of signal caused by the Gibbs phenomenon and resolve the frequency resolution problem on STFT. Therefore, it can be more accurately to extract the fault feature of loudspeaker, and improve the loudspeaker on-line automatic fault detection accuracy.
Loudspeaker STFT Window width Gibbs
Xu Zeng-pu Hu Li-xiang Qi Yu-ming
College of Mechanical Engineering Tianjin University of Science and Technology Tian jin,China
国际会议
成都
英文
564-567
2010-07-07（万方平台首次上网日期，不代表论文的发表时间）