中文摘要：

为了对机械振动故障进行实时诊断，提出了基于开关电流技术的Morlet小波变换的模拟实现方法。利用开关电流电路构造高斯函数发生器，解决了Morlet小波变换模拟实现的关键问题，其良好性能得到了仿真结果的证实，，将Morlet小波变换应用到机械振动故障诊断中，根据对振动信号小波变换的模极值点来定位奇异信号，提取出故障信息。仿真结果表明了该方法对机械振动故障实时诊断的有效性。

英文摘要：

For the real time fault diagnosis of machinery vibration, the Morlet wavelet transform （WT） simulation implementation based on switched current （SI） circuits is proposed. The application of switched current circuits for Gaussian function generator solves the key problem in the analog implementation of Morlet WT, and the good performance of SI Gaussian function generator is verified by simulated results. It applies Morlet wavelet transform in machine vibration fault diagnosis and locates singular signal according to wavelet transform module maximum of the vibration signal to extract fault information. The simulation results show that the method for real time fault diagnosis of the mechanical vibration is effective.