提出了一种应用灰度击中击不中变换提取故障特征的方法.从待分析信号中指定若干个目标波形,由此计算得出击中击不中结构元素对,在每个采样点位置进行模式匹配,具有故障特征的波形段将具有较高的输出.应用于制氧厂驱动电机的碰摩信号和转子试验台的冲击信号,成功提取出削波特征和冲击特征.该方法与人工分析信号的思路接近,算法容易理解,可以作为从时域波形直接提取故障特征的一种有效方法. A method of applying gray-hit hits to extract fault features is proposed.A number of target waveforms are specified from the signals to be analyzed, and the pairs of structural elements hitting the hits are calculated and located at each sampling point The pattern matching and waveform segment with fault feature will have higher output.It is applied to the rubbing signal of the drive motor of oxygen plant and the impact signal of the rotor test stand to extract the characteristics of clipping and impact.The method is compared with manual analysis Signal ideas close to the algorithm easy to understand, can be used as an effective method to extract fault features directly from the time-domain waveform.