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Studies on a parallel system with two types of failure
M. A. El-Damcese,Sharhabeel.Alaidi,M. S. Shama 한국신뢰성학회 2015 International Journal of Reliability and Applicati Vol.16 No.1
In this paper, we investigate reliability and availability of repairable systems with two types of failure. The first one is to one unit and the second one is to M units in parallel structure. Let failure rate and repair rate of [type1, type2] components are assumed to be exponentially distributed. The expressions of availability and reliability characteristics such as the system reliability and the mean time to failure are derived for two systems. We used several cases to analyze graphically the effect of various system parameters on the reliability system and availability system.
El-Damcese, M.A.,Helmy, A.N. The Korean Reliability Society 2008 International Journal of Reliability and Applicati Vol.9 No.2
This paper presents equations, which can be used to evaluate the failure frequency and the failure rate of a two identical component parallel redundant system in which each component can operate in its wear out period, and the failure rate of each component is exponential power distribution. The optimum maintenance interval for a two identical component parallel redundant system can be obtained using these equations. The proposed approach is presented and illustrated using several numerical examples. The optimum maintenance interval for each component in a two identical parallel redundant system will depend on factors such as: failure rate, repair and maintenance times of each component in the parallel redundant systems.
Reliability Equivalence Factors of a Series - Parallel System in Weibull Distribution
El-Damcese, M.A.,Khalifa, M.M. The Korean Reliability Society 2008 International Journal of Reliability and Applicati Vol.9 No.2
This paper discusses the reliability equivalences of a series-parallel system. The system components are assumed to be independent and identical. The failure rates of the system components are functions of time and follow Weibull distribution. Three different methods are used to improve the given system reliability. The reliability equivalence factor is obtained using the reliability function. The fractiles of the original and improved systems are also obtained. Numerical example is presented to interpret how to utilize the obtained results.
Studies on a parallel system with two types of failure
El-Damcese, M.A.,Alaidi, Sharhabeel,Shama, M.S. The Korean Reliability Society 2015 International Journal of Reliability and Applicati Vol.16 No.1
In this paper, we investigate reliability and availability of repairable systems with two types of failure. The first one is to one unit and the second one is to M units in parallel structure. Let failure rate and repair rate of [type1, type2] components are assumed to be exponentially distributed. The expressions of availability and reliability characteristics such as the system reliability and the mean time to failure are derived for two systems. We used several cases to analyze graphically the effect of various system parameters on the reliability system and availability system.
Studies on a standby repairable system with two types of failure
M. A. El-Damcese,M. S. Shama 한국신뢰성학회 2015 International Journal of Reliability and Applicati Vol.16 No.2
In this paper, we study the reliability analysis of a repairable system with two types of failure in which switching failures and reboot delay are considered. Let units in this system be cold standby, and failure rate and repair rate of [type1, type2] components be exponentially distributed. The expressions of reliability characteristics - such as the system reliability and the mean time to system failure MTTF - are derived. We use several cases to graphically analyze the effect of various system parameters on the system reliability and MTTF. We also perform a sensitivity analysis of the reliability characteristics with changes in specific values of the system’s parameters.
Studies on a standby repairable system with two types of failure
El-Damcese, M.A.,Shama, M.S. The Korean Reliability Society 2015 International Journal of Reliability and Applicati Vol.16 No.2
In this paper, we study the reliability analysis of a repairable system with two types of failure in which switching failures and reboot delay are considered. Let units in this system be cold standby, and failure rate and repair rate of [type1, type2] components be exponentially distributed. The expressions of reliability characteristics - such as the system reliability and the mean time to system failure MTTF - are derived. We use several cases to graphically analyze the effect of various system parameters on the system reliability and MTTF. We also perform a sensitivity analysis of the reliability characteristics with changes in specific values of the system's parameters.