Reliability-based design of reflector antennas with integrated structural-electromagnetic analysis using adaptive kriging modeling

• Published in: Journal of mechanical science and technology 2021, 35(12), , pp.5601-5610
• Main Authors: Hu, Naigang, Xu, Wanye
• Format: Article
• Language: English
• Subjects: Antennas; Computing costs; Constraint modelling; Control; Cost analysis; Design optimization; Dynamical Systems; Engineering; Industrial and Production Engineering; Material properties; Mechanical Engineering; Original Article; Performance degradation; Radio astronomy; Reflector antennas; Reliability analysis; Reliability engineering; Structural reliability; Uncertainty; Vibration; 기계공학
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-021-1131-x

Reflector antennas have been widely used in various applications, such as telecommunication and radio astronomy. However, they suffer from electromagnetic (EM) performance degradation caused by structural uncertainties. In this study, a reliability-based design optimization (RBDO) method for reflector antennas that involves EM performance with adaptive kriging modeling is developed for the first time to the authors’ knowledge. An integrated structural-EM analysis procedure for antennas with material property uncertainties is introduced. Then, an adaptive kriging-based reliability analysis method is developed to alleviate the heavy computational costs. To improve kriging modeling efficiency, a priori knowledge of antennas is utilized to reduce the traditional initial sampling region. Finally, the RBDO problem is formulated as a double-loop process with a reliability index constraint. Simulation results show that the proposed method can significantly improve structural reliability with considerably less computational cost.