2-unit Standby Redundant System Research Articles

Stochastic behavior of a 2-unit standby redundant system with imperfect switchover and preventive maintenance

We discuss a 2-unit standby redundant system with imperfect switchover and preventive maintenance (PM). The switch assumes up and down states repeatedly, independently of the behavior of the main unit. We have the stochastic behavior of the system.

Stochastic behaviour of a 2-unit standby redundant system with imperfect switchover and preventive maintenance : M. I. Mahmoud and M. A. W. Mahmoud. Microelectron. Reliab.23 (1), 153 (1983)

Stochastic behaviour of a 2-unit standby redundant system with imperfect switchover and preventive maintenance : M. I. Mahmoud and M. A. W. Mahmoud. Microelectron. Reliab.23 (1), 153 (1983)

Repair Limit Suspension Policies for a 2-Unit Redundant System with 2-Phase Repairs

This paper considers a repair limit suspension model for a 2-unit standby redundant system with 2-phase repair. A failed unit is first repaired by a phase 1 repair. If the repair is not completed up to the fixed repair-limit time then the unit goes for a phase-2 repair. A phase-2 repair of both failed units is done simultaneously. We first derive various reliability measures by a Markov renewal process and then discuss the optimum repair-limit suspension policies maximizing the availability. Numerical examples are presented.

Stochastic Models of 2-Unit Systems

This paper obtains the availability of two models of 2-unit standby redundant systems with two repair facilities, using the regeneration point technique.

Availability of a two-unit standby system with switchover time and proper initialization of connect switching

A 2-unit standby redundant system with connect switching (CS) is considered. The standby unit takes random switchover-time when the operative unit fails and CS is properly initialized in a random time after each repair. Failure-time distributions of units are exponential whereas all other distributions are arbitrary. In this note we employ the method of semi-Markov process to obtain steady-state availability of the system.

Analysis of 2 Models of Standby Redundant Systems

Two models of standby redundant systems are considered. Failure time distributions are exponential whereas repair time distributions are arbitrary. Model 1 is a 2-unit standby redundant system with failure analysis time and two types of repair. Model 2 has two series subsystems; one is a 2-unit parallel system with s-dependent units; the other has one unit and is given priority in repair. Semi-Markov process technique is used to obtain mean time to system failure, steady-state availability, absorption probabilities, s-expected number of visits to a state, second moment of time in an up state, and s-expected profit.

Behaviour of a two-unit standby redundant system with imperfect switching and delayed repair

A 2-unit standby redundant system with imperfect switchover is considered. A repair facility is assumed to be available only at a fixed proportion of time. Failure-time distributions of units are exponential whereas repair-time distributions, distribution of time for the repairman to become available are general. The system has been investigated in detail by the help of semi-Markov process and closed form results are obtained for mean-time-to-system-failure, steady-state availability, expected number of occurrences of a state, expected profit and second moment of time in up state. Behaviour of several parameters has also been studied and several earlier models are included as particular cases.

Analysis of a 2-unit standby redundant system with two types of failures : Ashok Kumar and Manju Agarwal. IEEE Trans. Reliab.R-27, (4) 301 (October 1978)

Analysis of a 2-unit standby redundant system with two types of failures : Ashok Kumar and Manju Agarwal. IEEE Trans. Reliab.R-27, (4) 301 (October 1978)

Stochastic behaviour of a standby redundant system : Ashok Kumar and Roshan Lal. IEEE Trans. Reliab.R-27, (2) 169 (June 1978)

A 2-unit standby redundant system with connect switching (CS) is considered. The standby unit takes random switchover-time when the operative unit fails and CS is properly initialized in a random time after each repair. Failure-time distributions of units are exponential whereas all other distributions are arbitrary. In this note we employ the method of semi-Markov process to obtain steady-state availability of the system.

A note on repair limit suspension policies for a 2-unit standby redundant system with two phase repairs

A note on repair limit suspension policies for a 2-unit standby redundant system with two phase repairs

Stochastic behaviour of a 2-unit standby redundant system with two switching failure modes

A 2-Unit standby redundant system with switching failure modes:Transfer switch and connect switch is considered. Failure distributions of units and connect switch are exponential and repair time distribution are general.Stochastic behaviour of the system has been studied by semi-Markov process and parameters of interest, e.g/., MTSF, expected numbers of visits to a state, steady-state availability, net profit have been obtained MTSF has been studied for its behaviour. Several earlier models are shown as particulate cases.

Reliability of a 2-Unit Priority-Standby Redundant System with Finite Repair Capability

This paper analyses the reliability of a 2-unit standby redundant system consisting of two dissimilar units. Unit 1 performs the desired system function whenever available for use. Unit 2 operates only during those periods when unit 1 is undergoing repair. Unit 1 can be repaired at most N times. Expressions for the Laplace-Stieltjes transform of the distribution of the Time to System Failure (TSF) and the mean TSF are derived.

Reliability of a 2-unit standby redundant system with constrained repair time : J. R. Arora. IEEE Trans. Reliab.R-25 (3) 203 (August 1976)

Reliability of a 2-unit standby redundant system with constrained repair time : J. R. Arora. IEEE Trans. Reliab.R-25 (3) 203 (August 1976)

Stochastic Behavior of 2-Unit Standby Redundant Systems with Imperfect Switchover

We discuss two models of 2-unit standby redundant systems with imperfect switchover. In Model I the switch assumes up and down states repeatedly, independently of the behavior of the main unit. We obtain the stochastic behavior of the system, i.e., the first-passage time distributions, the expected numbers of visits to a certain state, and the transition probabilities. In Model II the failure of the switch can be detected only when it is used.

Reliability of a 2-Unit standby redundant system with repair, maintenance and standby failure : R. Subramanian and K. S. Venkatakrishnan. IEEE Trans. Reliab.R-24, (2) 139 (1975)

Reliability of a 2-Unit standby redundant system with repair, maintenance and standby failure : R. Subramanian and K. S. Venkatakrishnan. IEEE Trans. Reliab.R-24, (2) 139 (1975)

Optimum Preventive Maintenance Policies for a 2-Unit Redundant System

Optimum preventive maintenance policies are discussed to maximize the availability for a 2-unit standby redundant system. The Laplace-Stieltjes transform of the pointwise availability and the steady-state availability are derived by applying a unique modification of the regeneration point techniques under the assumptions that all the distributions are arbitrary. A theorem gives the optimum preventive maintenance time which is a unique and finite solution of the equation under certain conditions. A numerical example is presented.