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김기태 ( Ki Tae Kim ),박부희 ( Boo Hee Park ),장중순 ( Joong Soon Jang ),정기윤 ( Ki Yoon Jeong ),김덕진 ( Duck Jin Kim ) 대한설비관리학회 2010 대한설비관리학회지 Vol.15 No.2
In this paper, we compare a performance of principal component analysis(PCA) and independent component analysis (ICA) process monitoring which are multivariate process monitoring technique. ICA monitoring which is recently developed has been evaluated by compared with PCA monitoring. However there is only simple case to evaluate a performance of these monitoring in the many researches. It is not covered with many cases which can occur in diverse processes. In this paper, the monitoring performance is compared with applications to various simulations. The results of simulation present that these monitorings have a different preference according to process situations.
송현석(Hyun-Seok Song),서영교(Young-Kyu Seo),정도현(Do-Hyun Jung),장중순(Joong-Soon Jang),김은규(Eunkyu Kim),박부희(Boo-Hee Park) 한국신뢰성학회 2017 신뢰성응용연구 Vol.17 No.3
Purpose: The purpose of this study is to estimate the lifetime of commercial passenger vehicles shock absorber using degradation test and data. Method: The degradation factor of shock absorber was determined to be a damping force using FMEA. Degradation test was performed on damping force under real world usage condition and analysed the degradation data. Results: To estimate the lifetime of shock absorber, a degradation model was developed and a numerical example was provided. Conclusion: Evaluation of the lifetime of commercial and military vehicles shock absorber will be possible by using the proposed degradation analysis method.
송현석(Hyun-Seok Song),손민호(Min-Ho Son),유성주(Sung-Ju Yoo),정도현(Do-Hyun Jung),박부희(Boo-Hee Park) 한국신뢰성학회 2020 신뢰성응용연구 Vol.20 No.3
Purpose: For remanufactured military parts, design a design for reliability (DFR) program based on the reliability, availability, and maintainability (RAM) management program may be ineffective. Therefore, a case study of the DFR is desirable to demonstrate its reliability in the context of remanufactured military power supply. Methods: A DFR program and elements were developed for a remanufactured military power supply. The DFR program was realized through reliability target establishment, environmental condition analysis, reliability modeling (through Reliability Block Diagrams, RBDs), failure mode and root cause analysis, and reliability prediction. Results: The target MTBF of the remanufactured military power supply was determined to be 13,800 hrs. The reliability prediction was conducted based on MIL-HDBK-217 at room temperature (25℃) and high temperatures (85℃and 100℃) under a naval sheltered environment by using PTC Windchill Quality Solutions (formerly RELEX). The predicted MTBFs were 809,189 hrs, 460,954 hrs, and 382,642 hrs at 25℃, 85℃, and 100℃, respectively. Therefore, the predicted MTBFs could ensure the target MTBF of 13,800 hrs. Conclusion: A case study of the DFR was performed on a remanufactured military power supply by using the military RAM management program.
부하-강도 분석을 이용한 격막형 펄스분리장치의 내열강도에 대한 신뢰성 예측 사례연구
이동원(Dong-Won Lee),정세용(Se-Yong Jeong),이방업(Bang-Eop Lee),정규동(Gyoo-Dong Jung),박부희(Boo-Hee Park),안동근(Dong-Geun An),장중순(Joong-Soon Jang) 한국신뢰성학회 2015 신뢰성응용연구 Vol.15 No.2
A stress-strength analysis is used to assess the reliability of a multi-pulse rocket motor system. Main stress is found to be thermal during explosion and the distribution is obtained by simulation. The strength distribution is derived from the results of actual specimen tests. The failure rate of barrier type pulse separation device is estimated.