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  5. The estimation of the use of corner reflectors for simulation of tactical aviation aircraft

The estimation of the use of corner reflectors for simulation of tactical aviation aircraft

O. Sukharevsky, V. Vasilets, I. Ryapolov, Ye. Ryapolov
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Description: The relevance of the use of the towed false target of tactical aviation, its main element of the electromagnetic wave reflection is the angular reflectors, is substantiated in the article. The surface model of Su-27 aircraft and trihedral corner reflector was developed using mathematical modeling methods. The value of the effective reflective area (ERA) of Su-27 aircraft model and trihedral corner reflector in the high-frequency wavelength range is obtained. The research of characteristics of scattering by corner reflector for various applications is carried out. The first method involves the use of a "quadrant" corner reflector whose axis is directed along the axis of the false target. It allows to get the same scattering diagrams in the four sectors of the irradiation from the anterior hemisphere. Another proposed method of using corner reflector is the use of a single corner reflector, whose axis is deflected down the axis of the false target, allows for high values of ERA for nasal probing. The dependence of median ERA of Su-27 model and the quadrant corner reflector with cutouts from the azimuth of irradiation is presented. The median value is obtained in the ten-degree range of the azimuthal angles and represent the values of ERA used in the calculating the range of the object's detection with a probability of 0,5. In carrying out the researches considered in the article, the methods based on integral representations of classical electrodynamics and their short-wave asymptotics were used. The results show that if it is necessary to obtain high value of ERA for a false target when probing from the anterior hemisphere, then it is necessary to use "quadrant" corner reflector, and if it is necessary to simulate the exact median values of ERA of the real object in a narrower body corner of the irradiation corners, then it is better use one tilted corner reflector. It is expedient to use the obtained results during the development of air false targets for the simulation of secondary radiation of various complex aerodynamic objects, with the use of corner reflectors as a reflection element.


Keywords: effective reflective area, corner reflector, methods of mathematical modeling, false target

Reference:
 Sukharevskyi, O.I., Vasylets, V.O., Riapolov, I.Ye. and Riapolov, Ye.I. (2018), “Otsinka vykorystannia kutovykh vidbyvachiv dlia imitatsii litakiv taktychnoi aviatsii” [The estimation of the use of corner reflectors for simulation of tactical aviation aircraft], Science and Technology of the Air Force of Ukraine, No. 2(31), pp. 73-78. https://doi.org/10.30748/nitps.2018.31.09.