2.4.1 幅度特征(Amplitude Characteristics) 2.4.2 统计特征(Statistical Characteristics)
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对加速度进行特征提取，可以使得波形的幅度特征更加明显，有利于进行轨道故障的检测。
The waveforms 'amplitude character will be more distinct through accelerations 'feature extraction, and this is propitious to rail deformation detection.
介绍了一种基于信号幅度特征的时域提取算法，可以准确地从数模混合信号中提取数字信号。
This paper introduces a time-domain extracting arithmetic based on signal range feature. The digital signal can be extracted from digital and analog mixed-signal exactly.
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。
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.
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