英语翻译随着现代科学技术的进步和生产系统的不断发展，电机在生产中发挥着越来越重要的作用。电机故障不仅会损坏电机本身，而且

英语翻译
随着现代科学技术的进步和生产系统的不断发展，电机在生产中发挥着越来越重要的作用。电机故障不仅会损坏电机本身，而且会影响整个系统的正常工作，甚至危及人身安全，造成巨大的经济损失。通过对常见故障的诊断和分析，可以及早发现故障和预防故障的进一步恶化，减少突发事故造成的停产损失，并为实现状态检修创造条件。
针对异步电机的工作原理，系统阐述了异步电机故障诊断系统的研究现状和发展方向，并对基于振动信号的电机故障诊断研究进行了初步分析，分析了电机常见的异常振动的主要类型。
本文主要研究了小波变换理论和小波包分析理论，从原理上分析了小波基的选择。本文利用小波包变换对异步电机进行故障诊断。本文采用基于小波包的振动诊断法对电机滚动轴承故障进行诊断。对于存在已知轴承故障的电机，在故障状态下采集到振动信号，利用峭度值计算和小波包分析相结合的方法，选用db3和db10作为小波基，进行小波包分析，对包含有故障特征频率信息的信号进行重构，获得轴承故障特征频率，根据故障特征频率的数值和能量，确定出轴承故障的类型。
*****（PS：是中译英）****

With modern science and technology progress and the development of production system,motor in production is playing a more and more important role.Motor fault will not only damage the motor,and will affect the whole itself the normal work of the system,even endanger personal safety,cause huge economic losses.Through to the common fault diagnosis and analysis,early detection and prevention of fault fault further deterioration,reduce accident caused by the loss of production,and to create the conditions for the realization of the state overhaul.
According to the work principle of asynchronous motor,this paper expounds asynchronous motor fault diagnosis system the research present situation and the direction of development,and the vibration signal of motor based on fault diagnosis research paper analyzes the motor common main types of abnormal vibration.
This paper mainly studied wavelet transformation theory and wavelet packet analysis theory,from the analysis on the principle of wavelet choice.This paper,by using wavelet packet transform fault diagnosis of asynchronous motor.This paper based on wavelet packet vibration diagnosis of rolling bearing fault diagnosis.Known for existence of motor bearing fault in fault state collected to the vibration signal,the use of kurtosis value are calculated and wavelet packet analysis method of combining the db3 and db10,choose as a wavelet and wavelet packet analysis,to include fault feature frequency information signal reconstruction,get bearing fault characteristic frequency,according to the fault feature of the frequency of numerical and energy,confirmed the bearing fault type.