The periodic transient impact effect of gear early fault is weak. In order to settle this problem, the method of polar coordinate enhancement based on Continuous Wavelet Transform is proposed. Because of the rotation feature of a running gear, time frequency distributions of several cycles obtained in rectangular coordinate are transformed to angular frequency distribution, then are mapped into polar coordinate plane. The experimental results show that the noise with no period is restrained, periodic transient impact feature of signal is enhanced, and the gear early pitting fault is diagnosed effectively.
Key words
gear /
early pitting /
polar coordinate;enhancement
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References
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