fault signature meaning in Chinese

故障表征
故障特征

The most difficult is in lack of fault signature tool , which comes from the features of the ehs system such as time varying , non - linear and coupling of fluid and solid
其一是，电液伺服系统的时变，非线性，液固耦合等特点，使其状态信号具有时变特征，使得故障特征提取与故障诊断较为困难。
This doctorate thesis investigates into the techniques of fault detection and diagnosis ( fdd ) in electromechanical system . some novel methods of fault signature extraction are presented , with which many kinds of fault are diagnosed in simulations and experiments
本论文主要对机电系统故障检测与诊断技术进行了研究，提出了若干种故障特征信号提取新方法，并充分利用这些方法对异步电机及滚动轴承的多种故障诊断进行了大量的仿真及实验研究。