Application of correlation matching for automatic bearing fault diagnosis |
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Authors: | Xiaofeng Liu Lin Bo Xingxi He Martin Veidt |
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Affiliation: | 1. The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, PR China;2. School of Engineering, The University of Queensland, Brisbane, Qld 4072, Australia |
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Abstract: | This paper introduces an automatic feature extraction algorithm for bearing fault diagnosis using correlation filtering-based matching pursuit. This algorithm is described and investigated in theory and practice on both simulated and real bearing vibration signals. First, the vibration model for rolling bearing with fault is derived. Then, the numerical simulation signal being taken as an example, the principle of matching pursuit is mathematically explained and its drawbacks are analyzed. Afterward, to enhance the similarity of model related to the bearing faulty impulses, the model shape parameters are optimized using spectrum kurtosis and smoothing index. After that, the model with optimum shape and period parameters is taken as a template to approximate the impulses in faulty bearing signal. Finally, based on maximizing correlation principle, the optimized cycle parameter being as impuls e repetition period is matched up. The proposed method has been successfully applied in actual vibration signals of rolling element bearing with different faults. |
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