大型直线振动筛裂纹信号的功率谱分析

Power spectrum analysis on crack signals of the large-scale line vibrating screen

以振动筛的下横梁作为损伤结构识别的研究目标,利用计算机软件MatLab对裂纹信号进行了分析。试验证明,用AR模型对裂纹信号进行功率谱估计,可准确提取裂纹的信号特征,以实现对裂纹损伤的自动识别。

The lower crossbeam is regarded as a researched object, the crack signals are analyzed by MATLAB software. The test results display that AR power spectral estimation is a suitable method of signal processing to detect material crack damage, and the characteristics of crack can be abstracted form acquiring signal, so the crack damage can be identified automatically.