The article analyses original methods of DGA fault diagnose, include three-ratio method, artificial neural network method, Fuzzy Theory, diagnosing expert system, grey relational algorithm, et.
本文分析了原有的DGA故障诊断方法，包括三比值法、人工神经网络法、模糊理论、变压器诊断专家系统、灰色关联算法等。
Grey system theory is introduced into the multi-attribute fuzzy optimal selection of design scheme, the fuzzy optimal selection model is formed based on the grey relational analysis.
将灰色系统理论引入设计方案的多属性模糊优选，形成基于灰色关联分析的模糊优选模型。
Based on the fuzzy relational model of the open-loop system, the design of a fuzzy feedback controller is discussed.
以开环系统模糊关系模型为基础，讨论了模糊关系系统反馈控制器的设计。
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