１、振动诊断原理工程机械状态的振动监测与故障诊断（简称振动诊断）是应用最普遍、最基本的诊断技术。工程机械运行过程中发生异常时，一般都会伴随振动的变化。根据对振动信号测量、处理、分析及识别的结果，就能在不停机、不解体的情况下，对工程机械故障部位、原因以及故 1, the principle of vibration diagnosis The status of construction machinery vibration monitoring and fault diagnosis (referred to as vibration diagnosis) is the most common application of the most basic diagnostic techniques. When an abnormality occurs in the operation of a construction machinery, the vibration will generally be accompanied by changes. According to the vibration signal measurement, processing, analysis and identification of the results, we can not stop, do not disintegrate circumstances, the construction machinery failure parts, the reasons and the