噪声与振动控制2016，Vol.36Issue(3)：159-163,5.DOI:10.3969/j.issn.1006-1335.2016.03.033
基于阶次窄带包络分析的直驱风机轴承微弱故障诊断
Weak Fault Diagnosis Method for Direct-drive Wind Turbine Rolling Bearings Based on Order Narrow Band Envelope Analysis
摘要
Abstract
A new method based on order narrow-band envelope (ONBE) is proposed to diagnose the early weak fault of direct-drive wind turbine rolling bearings. Firstly, the time spectrum of the fault signal of the direct-drive wind turbine rolling bearing under variable speed conditions is obtained, and the equivalent frequency is set. Then, the time-frequency automatic peak-searching algorithm is employed to search for the time and frequency peak values corresponding to the equivalent rotation frequency. Furthermore, the curve of speed signal is obtained by least squares fitting, resampling phase discrimination labels are calculated based on the speed curve, and the original signals are resampled in an angle domain. Finally, the ONBE spectrum of the rolling bearing fault signal is obtained which can be used to diagnose the rolling bearing faults. This method can eliminate the effect of the change of speed and can overcome the difficulty of extracting the low frequency weak signals. This method provides a new way for fault diagnosis of rolling bearings. The application example in direct-drive wind rolling bearings verifies the effectiveness of this method.关键词
振动与波/直驱风电机组/滚动轴承/阶次分析/窄带包络解调Key words
vibration and wave/direct-driven wind turbine/rolling bearing/order analysis/narrow-band envelope demodulation分类
机械制造引用本文复制引用
丁雪娟,王红星..基于阶次窄带包络分析的直驱风机轴承微弱故障诊断[J].噪声与振动控制,2016,36(3):159-163,5.基金项目
北京天源科创风电技术有限责任公司科技资助项目(R&D [2015]F028) （R&D [2015]F028）
