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rantee system on
board, a vulnerability assessment model is p resented. Considering the fuzzy and random characteristics of
equipments failure and the sophisticated logic relationship s among equipments on board, on the basis of
fuzzy reasoning algorithm in fuzzy Petri net ( FPN) , an imp roved FPN model which can be app lied to e
valuate vulnerability of comp lex system s on board was constructed, combined with layered thought and BP
algorithm with nonlinear feedback. The new model is able to make a great number of uncertain parameters
in the system which gets rid of the dependerue on experience. The selection of model parameters was dis
cussed in detail, and then the model was used to evaluate vulnerability of aircraft guarantee system. The
results comparison between the p resented method and damage tree analysis method demonstrates exhaus
tiveness and rationality of this assessment model. The model would be app lied to sophisticated system as
sessment on board.
Key words: aircraft guarantee system; vulnerability; imp roved fuzzy Petri net; assessment model
运行管理复杂 ,出发回收须经过升降 、引导 、排列 、
引 言
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