Reduced-order models for array structures mounted on platforms with parameters variations.

A hybrid model order reduction (MOR) method is developed to calculate the electromagnetic characteristic of array structures mounted on platforms with parameters variations. The reduced-order model (ROM) of the platform is generated as a reduced-order input-output matrix during the offline stage. Using the equivalence principle algorithm (EPA), the ROM of array is generated by transferring the unknowns on the elements to equivalence surfaces. The frequency and material independent reactions (FMIR) method is applied to support the sweep of array material parameters. In the online stage, when the array positions vary in the input region, both of the array and platform ROMs can be used repeatedly. When the array materials vary in the input region, the platform ROM and geometry dependent matrices of EPA are reusable. Therefore, the computational cost can be reduced significantly. Comparing the proposed method to commercial solver, two numerical results are given to show the efficiency. [ABSTRACT FROM AUTHOR]