- Volume 17 Issue 11
DOI QR Code
Reliability Analysis of cooler in Thermal Observation Device
열상감시장비의 냉각기 신뢰도 분석
- Hong, Seok-Jin (DTAQ (Defense agency for Technology and Quality)) ;
- Jung, Yun-Sik (DTAQ (Defense agency for Technology and Quality)) ;
- Kim, Jin-Hwan (DTAQ (Defense agency for Technology and Quality))
- Received : 2016.09.29
- Accepted : 2016.11.10
- Published : 2016.11.30
The cooler, which is the main part in a Thermal Observation Device (TOD), makes the TOD function by reducing the temperature. As the cooler is imported, overseas enterprises presented 20,000 hours as the operation time and the military have used the cooler as presented. However, failures have occurred occasionally after mass production stage. Therefore, we need to analyze the MTBF of the TOD cooler. So, military and defense industry companies collected the failure data of the TOD cooler. We analyze the MTBF of the TOD cooler using survival probability function and failure data. We find the optimal distribution by applying parametric method and estimate parameters. We determine that the Log-logistic distribution is the most appropriate for this data. Also, we analyze the reliability per hour of the TOD cooler. The result of MTBF of the TOD cooler was higher than that of presented by oversee enterprises.
Cooler;Reliability;TOD(Thermal Observation Device);Survival Analysis;Hazard Funtion;MTBF
- DS, Bae, YL, Jeon, Reliability Analysis, Arce, 1999.
- YG, Son, JH, Ryu, The sensitivity analysis of the number of sample and time of sampling of Reliability Estimation regarding qualitative data, Journal of Korea Academia-industrial cooperation society, vol. 12, no. 2, pp. 581- 582, 2011. https://doi.org/10.5762/KAIS.2011.12.2.581
- MS Do, SA Kwon, Selection of life distribution about appropriate packaging using concept of reliability, Korea road society, vol. 12, no. 1, pp. 61-69, 2010.
- DH, Park, JH Lim, KH Nam, Concept and application of life distribution for Engineering, Youngchi, 2006.
- SK, Seo, Minitab Reliability Analysis, Eretec, 2015.