• Title/Summary/Keyword: Object Precision Method(OPM)

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RCS Analysis of Complex Structures Using Object Precision Method (Object Precision 방법을 이용한 복합 구조물의 RCS 해석)

  • Kim, Kook-Hyun;Kim, Jin-Hyeong;Cho, Dae-Seung
    • Journal of the Society of Naval Architects of Korea
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    • v.42 no.2 s.140
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    • pp.159-164
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    • 2005
  • Monostatic RCS analysis of complex structures has been done with a combined method of physical and geometric optics, commonly applied to high frequency electromagnetic backscattering problems. In the analysis, the complex structure is modeled as a number of flat surfaces and the RCS of whole structure is calculated by summing RCS of each surface, which can be obtained from an analytical solution of flat surface phase integral derived from physical optics. The reflected and hidden surfaces are searched by an object precision method based on adaptive triangular beam method, which can take account for effects of multiple reflections and polarizations of electromagnetic wave. The validity of the presented RCS analysis method has been verified by comparing with exact solutions and measured data for various structures.

A Study on the Effective Scattering Center Analysis for Radar Cross Section Reduction of Complex Structures (복합구조물의 RCS 저감을 위한 효율적 산란중심 해석에 관한 연구)

  • Kim, Kook-Hyun;Kim, Jin-Hyeong;Cho, Dae-Seung
    • Journal of the Society of Naval Architects of Korea
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    • v.42 no.4 s.142
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    • pp.421-426
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    • 2005
  • Scattering center extraction schemes for radar cross section reduction of large complex targets, like warships, was developed, which are an 1-D radar image method(range profile), and a direct analysis based on an object precision method. The analysis result of partial dihedral model shows that the presented direct analysis method is more efficient than the 1-D radar image method for scattering center extraction of interested targets, in terms of radar cross section reduction design, not signal processing. In order to verify the accuracy of the direct analysis method, a scattering center analysis of an naval weapon system was carried out, and the result was coincident with that of another well-known RCS analysis program. Finally, an analysis result of RCS and its scattering center of an 120m class warship-like model presented that the direct analysis method can be an efficient and powerful tools for radar cross section reduction of large complex targets.