fault characteristic extraction的用法和樣例：
例句
- Combining the cepstrum method could identify the characteristic frequency availably.
結合倒頻譜方法可以有效地識別故障特徵頻率。 - The proposed UWT effectively extracted the friction fault features of amplitude modulation and transient impact from vibration signal of a gearbox.
採用這種非抽樣小波變換從齒輪箱的振動信號中有效提取幅值調製和瞬態衝擊的摩擦故障特徵。
