選好度付セットベースデザイン（PSD）手法のフィルタ設計への適用の検討

Abstract

Electrical design is usually made with the concepts based on the electric circuit theory. Nowadays it needs to consider the electromagnetic (EM) fields generated in devices, components, and equipment to achieve their expected performances and satisfy the electromagnetic compatibility (EMC) regulations as well. In such kind of design, it is required to pursue a solution which satisfies simultaneously multi-objective performances sometimes including conflicting requirements. In this paper, the application of a multi-objective satisfactory design method to electrical design is discussed. The method, named preference set-based design (PSD), is developed as a concurrent design method in the field of mechanical engineering. As a first application to electric and electronic fields, the method is applied to filter designs and its validity is discussed. Applied filter is an ordinary five-order low-pass filter composed of plural element parameters and objectives or performances of attenuation characteristics. In practical cases, some design uncertainties should be taken into account, for example an unnecessary magnetic fields coupling between inductors. Design solution expressed in terms of point value cannot easily and effectively handle the design uncertainties since there is no theoretical guarantee that the solution converges in such case. Such an uncertainty problem is treated in this study. By using the resultant parameter sets, the attenuation characteristics are analyzed and confirmed whether the required performances are satisfied.