旋转机械的振动具有其复杂性和特殊性，在各个响应频率下，转子的运动轨迹是一个椭圆，该轨迹的主振矢、所在方向、副振矢以及进动方向是进行旋转机械故障诊断的重要信息。本文给出一种实用的旋转机械振动分析方法——矢谱分析，对于旋转机械故障诊断具有十分重要的工程意义。 The vibration of rotating machinery has its own complexity and particularity. Under each response frequency, the rotor’s trajectory is an ellipse. The principal vibration vector, direction, sub-vibration vector and precession direction of the rotating machinery are for the diagnosis of rotating machinery failure Important information. This paper presents a practical method of vibration analysis of rotating machinery - vector spectrum analysis, for rotary machinery fault diagnosis has very important engineering significance.