Authors: Alexander V. Strukov
Addresses: JSC Specialized Engineering Company 'SEVZAPMONTAGEAUTOMATICA' (JSC SPIK SZMA), St. Petersburg, Russia
Abstract: The article deals with reliability assessment methods for systems with three-state elements. It is shown that further development of conventional logic-and-probabilistic methods (LPM) eliminates the LPM deficiencies such as analysis of only two element states and assumption of their independency. Two models of element failure impact on the system reliability are shown which demonstrate the principles of reliability assessment using the ARBITR software which incorporates capabilities of algebra of disjoint event groups and is based on the general logic-and-probabilistic method (GLPM).
Keywords: reliability assessment; three-state elements; fail-closed mode; fail-open mode; disjoint event groups; functional integrity schemes; three-state mode; element failure; system reliability; logical models; probabilistic models; modelling.
International Journal of Risk Assessment and Management, 2015 Vol.18 No.3/4, pp.266 - 275
Received: 23 Apr 2014
Accepted: 03 Oct 2014
Published online: 17 Aug 2015 *