發(fā)布時(shí)間：2018-06-10 05:42

  本文選題：貝葉斯網(wǎng)絡(luò) + 三態(tài)貝葉斯網(wǎng)絡(luò)　； 參考：《系統(tǒng)工程理論與實(shí)踐》2017年02期

【摘要】：針對(duì)將可靠性框圖(RBD)轉(zhuǎn)化為等價(jià)三層貝葉斯網(wǎng)絡(luò)(BN)時(shí)存在的與RBD結(jié)構(gòu)差異大的缺陷及組合爆炸問題,提出了一種將RBD轉(zhuǎn)化為同構(gòu)三態(tài)BN網(wǎng)絡(luò)的方法.通過將失效分為"物理故障"和"正常卻不工作"兩種模式,提出將網(wǎng)絡(luò)節(jié)點(diǎn)轉(zhuǎn)換為包含正常狀態(tài)以及上述兩種失效模式的三態(tài)節(jié)點(diǎn),取代僅有正常和失效兩種模式的傳統(tǒng)模型節(jié)點(diǎn).并在此基礎(chǔ)上深入分析了三態(tài)BN模型節(jié)點(diǎn)的條件概率表(CPT)設(shè)置方法.最后建立了與某型飛機(jī)航行任務(wù)RBD等價(jià)的三層BN模型和同構(gòu)三態(tài)BN模型,并對(duì)兩種BN進(jìn)行分析計(jì)算.理論和實(shí)例分析均表明,本文建立的三態(tài)BN不僅與原RBD拓?fù)浣Y(jié)構(gòu)相同,且能夠有效解決三層BN存在的組合爆炸問題,可成為系統(tǒng)可靠性分析的有效手段.
[Abstract]:In order to solve the problem that the reliability block diagram (RBD) is transformed into equivalent three-layer Bayesian network (BNs), which is different from RBD structure and the problem of combinatorial explosion, a method of transforming RBD into isomorphic three-state BN network is proposed. By classifying failure into "physical failure" mode and "normal but not working" mode, it is proposed that the network node should be transformed into a three-state node containing the normal state and the above two failure modes. To replace the traditional model nodes with only normal and failure modes. On this basis, the method of setting conditional probability table (CPT) of three state BN model nodes is analyzed. Finally, a three-layer BN model and a isomorphic three-state BN model are established, which are equivalent to the RBD of a certain aircraft flight mission, and the two kinds of BN are analyzed and calculated. Both theoretical and practical analysis show that the tristate BN is not only the same as the original RBD topology, but also can effectively solve the combinatorial explosion problem of the three-layer BN, and it can become an effective means for the reliability analysis of the system.
【作者單位】： 西北工業(yè)大學(xué)航空學(xué)院;
【基金】：工信部十二五質(zhì)量與可靠性技術(shù)基礎(chǔ)項(xiàng)目(2052013B003)~~
【分類號(hào)】：TP18

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本文編號(hào)：2002166