基于影响系数和滞后角的相位测定含义分析法

结合转子动力学和数学矢量线性特性,提出一种基于影响系数和滞后角来正确确定振动仪相位测定含义的新方法。首先,利用影响系数法,分析标准脉冲信号与振动信号的导前或滞后关系,以确定出不平衡方向位置;然后,根据滞后角定义,反推振动响应的正高点,计算出反推相位角,找出该角度与实测相位角的关系,从而推出振动仪所测转子同频振动相位的含义;最后,在无任何已知相位参考和比较的情况下,以LM S测试系统所测定的相位,应用该方法进行分析。结果表明该方法操作简单方便,能准确分析出各类振动仪相位测定的含义。

Analysis of Phase Measurement Based on Influence Coefficient and Lag Angle

The influence coefficient and lag phase are applied in research on measuring and diagnosing the phase angle definition of vibration analyzer based on the analysis of rotor dynamics and linear properties of mathematical vector. Firstly, the relationship between the standard pulse signal and vibration is studied by using the influence coefficient method to identify the direction of an unbal anced position. Then, according to the definition of lag angle, the high point of vibration response can be gotten by using the inverse method. The anti-vibrati on phase angle can be calculated, and the relationship between measured phase angle and the anti-vibration phase angle can also be inferred to determine the meaning of synchronous frequency vibration phase. Finally, without the definition of phase angle, the vibration phase measured by LMS test system is carried out. The test result shows that the proposed method is simple and easy to use, which can analyze and diagnose the phase angle meaning of different vibration analyzers effectively.