Because fault symptom space and fault space have complicated non-linear relations, the mathematical model of diagnosis system is difficult to build up.
由于故障征兆和故障类型之间常常存在复杂的非线性关系，使得诊断系统的数学模型很难获取。
The information of capacitive equipment fault are widely collected, and various detected data and fault symptoms are summarized to form a comprehensive fault set and symptom set.
通过广泛收集有关电容型设备的故障资料，综合其各种检测数据和故障征兆，获得了较为全面的故障集和征兆集。
First it gather equipment state, and acquire the information of symptom, then decompose systemic fault into sub-fault.
先采集设备状态，获取设备征兆信息，并将系统故障分解成各子故障。
A method of signal mutative symptom extraction is presented, in which the theory of wavelet transform is applied. Moreover, this method is used in fault diagnosis of test turntables.
应用小波变换理论提出了一种信号突变征兆提取方法，并将它应用于转台故障诊断中。
The characteristics of ground-fault of ungrounded system are given and the faults symptom is analyzed and judged.
阐述了小电流接地系统接地的特点并对其故障现象进行分析、判断。
An analysis is conducted of the types of symptoms in a vibration fault diagnostic system and the principles of symptom acquisition are proposed.
分析了振动故障诊断系统中征兆的类型，提出了征兆获取的原则，论述了征兆可信度计算的方法，提高了故障诊断的自动化水平。
The way of fault analysis is also described, e. g. to analyse by the aid of pressure gauge, by the symptom in traction and by a comprehensive method.
本文还介绍了分析故障的方法：即按压力表指示的压力分析故障，按机器牵引情况分析故障；以及采用综合分析法分析故障。
Relative errors between the deviation of the real fault symptom parameters and of the fault derived from the model are controlled less than 5%.
故障诊断模型症兆变量与实际故障症兆变量变化值相对误差控制在5%内，且不会对故障类型的判断产生影响；
Relative errors between the deviation of the real fault symptom parameters and of the fault derived from the model are controlled less than 5%.
故障诊断模型症兆变量与实际故障症兆变量变化值相对误差控制在5%内，且不会对故障类型的判断产生影响；
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