Dissertation > Aviation, aerospace > Aviation > Aircraft Construction and Design > Airfoil

Numerical calculation of the composite structure aircraft wing RCS

Author FanYu
Tutor GaoZhengPing
School University of Electronic Science and Technology
Course Materials Science
Keywords Stealth technology Electromagnetic Scattering Radar cross section Composite structure Method of Moments Integral equation TM wave TE wave
CLC V224
Type Master's thesis
Year 2004
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Is one of the defense high-tech stealth technology worldwide. The nature of radar stealth technology to reduce the target's radar cross section (RCS), thereby reducing the chance of being detected by radar. Accurate calculation of the RCS and the forecast is an extremely important part of the aircraft stealth design. Stealth technology in the United States the world's leading one of the important reasons is the accurate calculation and design of its RCS has been resolved. In this paper, the theoretical analysis and accurately calculate its RCS aircraft (aircraft, one of the main source of the missile) RCS - airfoil (wing, wing) electromagnetic scattering problems. The largest contribution to key parts - the trailing edge of the wing front loaded microwave absorbing dielectric material instead of the original metal material is reduced to its RCS effective method in the airfoil (wing, wing) of the radar echo. Accurate calculation of the electromagnetic scattering analysis of the composite structure of this metal - media wing surface and its RCS is the main content of the paper, at the same time, this article also analyzes and calculated the coating absorbing media wing surface, radar absorbing medium composite wrapped metal skeleton structure wing and metal structure wing and all-dielectric structure wing RCS. RCS calculation of the three-dimensional metal - dielectric composite structures wing model reasonable transformed into a two-dimensional metal - the medium composite structure model RCS study computational problems. Two-dimensional electromagnetic scattering problems can be divided into the TM and TE waves are solved, these two cases have made a detailed study to determine the solution of the problem. Calculation methods, the paper adopted the method of moments-based the strict electromagnetic field integral equation to calculate the composite structure of the metal - dielectric target electromagnetic scattering. The use volume integral equation method and area of ??sub-equation method to solve the problem. The monostatic RCS RCS can be divided into and bistatic RCS monostatic RCS calculation amount much larger than the bistatic RCS calculation but (because the actual radar system is the use of a single station) more practical significance, so this article is not only to calculate the double The station RCS also calculated the single station RCS. This work are expected to surface of the metal - dielectric composite structure aircraft wing stealth design and widely used metal - dielectric composite structure target electromagnetic scattering analysis and electromagnetic structure designed to provide theoretical guidance. Keywords; stealth technology, electromagnetic scattering, radar cross section, the composite structure, method of moments, integral equations, TM wave, TE wave

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