馬嵐，王厚軍
（電子科技大學(xué)自動(dòng)化工程學(xué)院，四川 成都 610054）
摘要：基于知識(shí)的故障診斷專家系統(tǒng)在應(yīng)用時(shí)面臨知識(shí)獲取、知識(shí)表達(dá)和知識(shí)與診斷推理有機(jī)融合等幾方面的困難。本文論述了一種使用表達(dá)式解析的故障診斷方法，并將其用于某型雷達(dá)系統(tǒng)的故障診斷保障系統(tǒng)中。該方法將知識(shí)表示為邏輯表達(dá)式，推理機(jī)使用表達(dá)式解析的方法推理知識(shí)。使用該方法，知識(shí)的獲取和更新更加方便，并且推理機(jī)和表達(dá)式相互獨(dú)立，具有相當(dāng)?shù)耐ㄓ眯浴?關(guān)鍵詞：故障診斷專家系統(tǒng)；表達(dá)式解析；知識(shí)獲取；知識(shí)更新；診斷推理
中圖分類號(hào)：TP333.7 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1672-4984(2006)04-0029-04
General fault diagnostic expert system based on expression parsing
MA Lan，WANG Houjun
(School of Automation Engineering，University of Electronic Science and Technology,Chengdu 610054,China)
Abstract: The study and application of knowledge-based fault diagnostic expert system has such difficulty with knowledge acquisition, knowledge representation and merger knowledge with diagnostic reasoning. This paper introduces a kind of new method based on expression parsing which has been used in radar automation test system. This method represents knowledge with the logic expression, then reasoning engine works with expression parsing. In this way knowledge acquisition and update is easier, and the reasoning is more general. Normally ,new fault diagnostic expert system will be got by little modification.
Key words：Fault diagnostic expert system；Expression parsing；Knowledge acquisition；Knowledge representation；Diagnostic reasoning
