A frequency tracking method is proposed.The synchronism sampling is achieved to improve the measuring precision of frequency and phase difference. 本文提出一种频率跟踪方法，可以在不过零开始采样的情况下，实现整周期采样，保证频率和相位差测量的精度。
This paper introduces a full period sampling method based on the resampling technology used in the sampling of rotor system vibration signals. 介绍了一种应用重采样技术的旋转机械振动信号的整周期采样方法。
