论文吕基于小波变换的电气设备故障诊断技术定稿.docx

论文吕基于小波变换的电气设备故障诊断技术定稿.docx: .
基于小波变换的电气设备故障诊断技术I
李淑娥邸敏艳吕锋
(河北师范大学电子系 050031)
摘 要 小波变换具有良好的时一频特性，因此可以有效地用于电气设备故障诊断。 在对电气设备进行故障分析、故障诊断过程中，利用小波变换进行故障信号的故障时刻 检测具有重要意义。小波变换用于电气设备故障诊断就是对电气设备各种电磁、机械等 信号进行实时监测控制，判别其状态，以求在故障初期或故障时刻发出警报，并随时进 行处理、排除故障。对信号进行特征提取，是故障诊断的关键。突变信号往往表明电气 设备发生了某类故障，如果能对突变信号进行有效识别，就可以进行故障诊断、故障分 析、从而排除故障。本文分析了电气设备故障的奇异性，通过仿真得出小波变换用于电 气设备故障诊断的方法，以准确检测奇异点，提取故障时刻。
关键词小波变换；信号检测；奇异点；故障时刻。
中图分类号：TM711
The Tecnology Of The Fault Diagnosis
In The Electricity Equipments Based On The Wavelet Transformation
Li Shue Di Minyan Lv Feng
(Electrical department of Hebei Normal University , Shijiazhuang 050031)
Abstract: Because of the wavelet transformation has the good hour-frequency
characteristic, So it can be availably used for the fault diagnosis in the electricity equipments. At the proceeds of the electric appliances equipments analyze and examination,It's so important that uses the wavelet transformation to the electric appliances equipments examination,The wavelet transformation uses for the electric appliances equipments examination is the examination of solid hour for the physics signal of electromagnetism、 machine its appearance> send out the alert at the early or every moment in the electric equipments breakdown and handle> expel the breakdown in the time. Withdrawing the signal characteristic is a key