DESIGN FOR SYSTEM AVAILABILITY IMPROVEMENT THROUGH REDUNDANCY AND MAINTENANCE

Abstract

In this project system availability is improved through redundancy and maintenance. For system modeling, Markovian approach is used. The effect of redundancies on system models is studied by increasing the level of redundancies on various components. For system model development, binary states are considered at component level. System rate diagram is developed considering the states and transitions. Transition leads to change of states due to failure or repair. Subsequently, mathematical model of the rate diagram is formulated in terms of rate of change of probabilities of the respective states. Further, set of rate equations is solved by Ranga Kutta method in MATLAB. For proposed methodology is illustrated by a power plant system. This work will be useful to the practicing power plant engineers for improving the power plant availability; also this will be helpful for system designers in designing the system with availability considerations. The importance of improving system availability can be analysis by considering critical system like aircrafts wherein failure not only impacts business financially but also can lead to fatal accidents.