RELIABILITY-ANALYSIS AND EVALUATION OF SYSTEMS

A procedure for the reliability analysis of mechanical and hydraulic systems is suggested through a reliability multinomial (VCM-r) or reliability function (VPF-r). The approach is based on graph theory and matrix algebra, and this takes into account complexities and interrelations of subsystems. Exhaustive and useful reliability analysis of a system is carried out and this also derives reliability based tests for the system. Coefficients of similarity or dissimilarity, which compare two systems based on reliability, are developed. Quantitative evaluation of the reliability of a system through the reliability index is proposed. This aids in the optimum selection of a system at the initial stage of design. The methodology is illustrated through an example of a hydraulic system.