Reliability determination of ignition system of rocket platform using reliability block diagram and FMEA analysis

Abstract

This paper presents reliability determination of ignition system using the reliability block diagram and also, Failure Mode and Effect Analysis of ignition system is performed. This system is based on PLC controller to control the sequence of operation and electrical devices have a function to connect and disconnect the electrical circuit for supplying electric power for igniting the rocket. According to the complexity system, sometimes found that out of function such as misfire and hang fire. In this investigation, reliability block diagram of the ignition system include mechanical and electrical mechanisms is determined. By considering reliability of each component based on history of using, maintenance record, test report, and expert opinion and using ignition system reliability block diagram, reliability of ignition system can is determined. Moreover, since connector is the most important parts of ignition system by the highest RPN number. Hence, these parts must have a high reliability and have to more preventive maintenance and replace the new one after found the defect.