Rolling Bearing Diagnostics by Combination Envelope Analysis and Zoom-FFT

摘要：

Envelope analysis has become an important approach for detection and diagnosis of rolling bearing incipient failure. But one of the on-going difficulties with envelope technique is to determine the best frequency band to envelop. This paper utilizes Hilbert zooming demodulation technique to diagnose rolling bearing early faults. Its significant novelty has two: on one hand, it gives a theoretical proof of the feasibility based on the analysis of fault types and vibration signals of rolling bears; on the other hand, it integrates zooming and envelope analysis in frequency domain to get the demodulation spectrum of fault signal. Experiments show that Hilbert zooming demodulation technique holds both high accuracy and fast speed in early fault diagnosis.

关键词： fault diagnosis signal processing envelope analysis zooming demodulation technique

作者: Yu Hongying Qiu Chunmei

作者单位: North University of China, Taiyuan 030051 Capital Museum Beijing China 100045

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）