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문근환,문희장,최주호,김진곤,Moon, Keun-Hwan,Moon, Hee-Jang,Choi, Joo-Ho,Kim, Jin-Kon 한국항공운항학회 2016 한국항공운항학회지 Vol.24 No.4
In this study, reliability prediction of the ignition system of hybrid rocket is performed. The FMECA is preceded to the reliability prediction. To this end, the ignition system is divided into 5 components and 19 potential failure modes. The failure cause and effects are identified and criticality analysis is carried out for each failure mode, in which the criticality number is estimated using the failure rate databases. Among the numbers, the failure modes and components with higher criticality and severity are chosen and allocated with higher weighting factor. The reliability predictions are performed using the failure rate databases, from which the current ignition system is found to satisfy the target reliability.
류승현,박영훈,문희장,Ryoo, Seung-Hyun,Park, Young-Hoon,Moon, Hee-Jang 한국항공운항학회 2017 한국항공운항학회지 Vol.25 No.1
The engine is the most significant and essential part of the aircraft. As a result, systematical handling in the aircraft development stage is required from engine design to implementation to the full-scale airframe. This survey demonstrates the procedures demanded by the KAS 23 Civil Aircraft to acquire the engine Type Certification and the flight test procedures for ensuring the operational stability. Surveys were conducted on domestic and international aircraft engine certifications, technical regulations and documentations related to the Means of Compliance for flight test development stage. In addition, organized reference items that should be considered for the certification of engine flight test procedures were reviewed based on the KC-100.