Meanwhile the vortex shift waveform is obtained from the estimated mean frequency waveform using a suitable low-pass filter. Then the vortex shedding frequency and amplitude can be calculated.

用合适的滤波器可以从估计出的平均频率曲线中得到涡流的波形，并且计算表征涡流的涡流经过频率和幅度特征参数。

youdao

Dsm dsp frequency feedback controller is made of dsp shift frequency and dsp automatism digital filter. dsp software searches howl point and lock it by locale condition with no adjusting.

dsp数字移频反馈控制器，由dsp数字移频-dsp自动数字滤波器组成，根据现场环境dsp软件自动寻找啸叫点并锁定，无需人工调节。

youdao

The scheme of measuring Brillouin frequency shift in fiber sensor based on edge optical filter is proposed.

提出了采用边缘光滤波器来测量光纤传感中布里渊频域的方案。

youdao