An optimal global projection denoising algorithm and its application to shaft orbit purification

作者：Hou, Shumin^*; Liang, Ming

来源：Structural Health Monitoring-An International Journal, 2011, 10(6): 603-616.

DOI：10.1177/1475921710395808

• noise reduction
• global projection
• phase space reconstruction
• shaft orbit purification
• fault diagnosis

Noise reduction is a main step in fault diagnosis of the rotating machinery. However, it is not effective enough to purify the nonlinear fault features from the vibration shaft orbits using the traditional signal denoising techniques. This article improved the global projection denoising algorithm via calculating the optimal time delay tau and embedding dimension m, which can be regarded as an extension of the global phase space reconstruction. The de-noising effects of Lorenz signal and the experiment cases illustrated the optimal global projection method is very effective and reliable in reducing the noise and reconstructing the signals. Consequently, it is heavily recommended for use in fault diagnosis of large rotating machinery as well as in the other kinds of machinery.

• 出版日期2011-11
• 单位武汉科技大学