期刊
APPLIED SCIENCES-BASEL
卷 11, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/app11115250
关键词
fault diagnosis; low rank; vibration source signal; separation; robotic bearings
类别
资金
- National Key Research and Development Program of China [2018YFB1304602]
- Beijing Natural Science Foundation [3192025]
- National Key Research and Development Plan of China [2016YFB1200602-26]
- National Natural Science Foundation of China [51905292]
- China Postdoctoral Science Foundation [2019M660615, 2020T130348]
The development of industrial robots and mechanical equipment has led to increasingly complex mechanical systems, posing a challenge for condition monitoring. Research has found that low rank is a common feature of rotating machinery vibration source signals, leading to the proposal of a multi-low-rank constrained vibration source signal separation method. This method has been shown to outperform other techniques in terms of clustering results and signal-to-signal ratio values.
With the development of industrial robots and other mechanical equipment to a higher degree of automation, mechanical systems have become increasingly complex. This represents a huge challenge for condition monitoring. The separation of vibration source signals plays an important role in condition monitoring and fault diagnosis. The key to the separation method of the vibration source signal is prior knowledge, such as of the statistical features of the vibration source signal, the number of vibration sources, and so forth. However, effective prior knowledge is difficult to obtain in engineering applications. This study found that low rank is a common feature of rotating machinery vibration source signals. To address the problem of the difficulty obtaining the signal feature of a vibration source, the multi-low-rank constrained vibration source signal separation method was proposed. Its advantages and effectiveness have been verified through simulations and experimental tests. Compared with the blind source separation method of independent component analysis (BSS-ICA) and the ensemble empirical mode decomposition (EEMD) methods, it obtained better clustering results and higher signal-to-signal ratio (SSR) values.
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