Journal
RELIABILITY ENGINEERING & SYSTEM SAFETY
Volume 92, Issue 2, Pages 269-274Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2005.11.057
Keywords
survivability; destructive factors; multilevel protection; multi-state system; universal generating function
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The paper considers vulnerable multi-state series-parallel systems operating under influence of external impacts. Both the external impacts and internal failures affect system survivability, which is determined as the probability of meeting a given demand. The external impacts are characterized by several destructive factors affecting the system or its parts simultaneously. In order to increase the system's survivability a multilevel protection against the destructive factors can be applied to its subsystems. In such systems, the protected subsystems can be destroyed only if all of the levels of their protection are destroyed. The paper presents an algorithm for evaluating the survivability of series-parallel systems with arbitrary configuration of multilevel protection against multiple destructive factor impacts. The algorithm is based on a composition of Boolean and the Universal Generating Function techniques. Illustrative examples are presented. (c) 2005 Elsevier Ltd. All rights reserved.
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