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http://dx.doi.org/10.3795/KSME-A.2010.34.6.743

Derating Design for Improving System Reliability by Using a Probabilistic Approach  

Son, Young-Kap (Dept. of Mechanical & Automotive Engineering, Andong Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.6, 2010 , pp. 743-749 More about this Journal
Abstract
This paper proposes a derating design method for improving system reliability by using a probabilistic approach. In the proposed design, the focus is upon system levels in determining derated levels of stresses such as temperature and current, unlike recent design approaches that focus on component levels. System reliability is evaluated using component reliability metrics that are given as functions of time and unknown stresses; this evaluation is based on a series system-reliability model. The variation in stress, which was not considered in previous derating designs, is introduced in the present design to account for the uncertainty in both environmental and operating conditions at the customer' hands. Optimization problems for system reliability improvement are formulated and solved using FORM to determine the best derating design. An example of a derating design for an electrical system shows the details of the proposed method and its applicability to systems design for reliability improvement.
Keywords
Derating Design; Probabilistic; System Level; Variation in Stress;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 1
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1 Min, D.-J., Kim, J.-J., Son, Y.K., and Kwack, K.-D., 2007, "Derating Design Approach of Aluminum Electrolytic Capacitor for Reliability Improvement," Proceeding of the KSME 2007 Spring Annual Meeting, pp. 1712-1717.   과학기술학회마을
2 Son, Y.K. and Savage, G.J., 2007, "Optimal Probabilistic Design of the Dynamic Performance of a Vibration Absorber," Journal of Sound and Vibration, Vol. 307, No.1/2, pp. 20-37.   DOI   ScienceOn
3 Edson, B. and Tian, X., 2004, "A Prediction Based Design-for-Reliability Tool," Annual Reliability and Maintainability Symposium, pp. 412-417
4 Tian, X., 2005, "Design-for-Reliability and Implementation on Power Converters," Annual Reliability and Maintainability Symposium, pp. 89-95
5 Melchers RE., 1987, Structural Reliability Analysis and Prediction. Wiley: Chichester
6 Rosenblatt, M., 1952, "Remarks on a Multivariate Transformation," Annual of Mathematical Statistics, Vol. 23, pp. 470-472.   DOI
7 Drezner, Z., Wesolowsky G. O., 1990, "On Computation of the Bivariate Normal Integral," Journal of Statistical Computation and Simulation, Vol. 35, pp. 101-107.   DOI
8 Lee, J.-S., Kim, J.-J., and Kwack, K.-D., 2006, "Accelerated Life Test for Regulator IC," Proceeding of the KSME 2006 Fall Annual Meeting, pp. 2396-2401.
9 Lee, J.-H., Choi, J.-W., Chang, M.-S., Shin, S.-J., and Kwack, K.-D., 2007, "Lifetime Estimation and Comparison of RGB LEDs for Electric Signs Use," Proceeding of the KSME 2007 Fall annual meeting, pp. 1272-1277.
10 Lee, H.-Y., Chang, M.-S., and Kwack, K.-D., 2008, "Lifetime Estimation of Amplifier IC due to Electromigration Failure," Proceeding of the KSME 2008 Fall Annual Meeting, pp. 1265-1270.   과학기술학회마을