Provide an efficient model to increase the accessibility of systems with repairable and non-repairable parts as a multi-objective problem of allocating surplus components
Volume 6, Issue 3, Autumn 2016, Pages 191-203
Hossein Zolfaghari, Ardeshir Ahmadi
Abstract Reliability and accessibility are important features in most systems, especially electronic and mechanical systems, which are in the industries of air communication, Internet networks, telecommunication systems, power generation systems, production facilities, etc., which are among the most important reasons for increasing the complexity of systems. , Hardening and more sensitive market competitive environment, increasing production costs in the event of a stoppage, and so on. In this paper, inspired by research on the reliability and optimization of systems reliability, a model with multiple objective function is presented, the objective function of which includes accessibility optimization and cost of all systems, where the system includes both non-repairable components and Is repairable. In this model, system accessibility, in addition to allocating surplus components to subsystems, allocation of accessibility for components is also considered, which increases the flexibility of the model to increase the accessibility of systems. To solve the designed model, a genetic algorithm based on the arrangement of non-privileged solutions (NSGA-II) is used, which has a high power to solve such problems. Finally, a numerical example is presented to express the efficiency of the proposed model and the method of solving it. In this example, a system is considered in which part of its components is unrepairable and the other part is repairable.