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Most Probable Failure Point Update Method for Accurate First-Order Reliability-Based Electromagnetic Designs
Journal of Magnetics, Volume 24, Number 3, 30 Sep 2019, Pages 408-412
Abstract
A most probable failure point update method is proposed to obtain an accurate reliability-based design of electromagnetic devices or systems in the presence of uncertainties. The first-order reliability method has been recently adopted to solve electromagnetic design problems. However, its result could be very erroneous especially for nonlinear or multi-dimensional performance functions. To overcome the drawback, a three-step computational procedure is additionally executed to ensure prescribed design feasibility at an optimum obtained from the conventional first-order reliability method: failure rate calculation, reliability index update, and most probable point update. A mathematical example and a blushless DC motor design problem are provided to demonstrate numerical accuracy of the proposed method by comparison with the conventional method.
Keywords: Electromagnetics; optimization; reliability theory; robustness
DOI: https://doi.org/10.4283/JMAG.2019.24.3.408
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