期刊
RELIABILITY ENGINEERING & SYSTEM SAFETY
卷 79, 期 3, 页码 319-331出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0951-8320(02)00241-7
关键词
system survivability; multi-state systems; separation of elements; universal generating function; genetic algorithm
In this paper we consider vulnerable systems which can have different states corresponding to different combinations of available elements composing the system. Each state can be characterized by a system performance rate, which is the quantitative measure of a system's ability to perform its task. Both the impact of external factors (attack) and internal causes (failures) affect system survivability which is determined as probability of meeting a given demand. We formulate the problem of finding structure of series-parallel multi-state system (including choice of system elements, their separation and protection) in order to achieve a desired level of system survivability by the minimal cost. An algorithm based on the universal generating function method is suggested for determination of the vulnerable series-parallel multi-state system survivability. A genetic algorithm is used as optimization tool in order to solve the structure optimization problem. (C) 2002 Elsevier Science Ltd. All rights reserved.
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