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  5. Realization of proportional self-homing of the corrected aerial bomb according to the information of the satellite navigation system

Realization of proportional self-homing of the corrected aerial bomb according to the information of the satellite navigation system

I. Kravchuk, V. Taranenko
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Description: Today, the most common and effective airborne guided weapons of the "air-to-surface" class are corrected aerial bombs, which use satellite navigation systems for targeting stationary ground objects. The features of the constructive and aerodynamic layout of the corrected aviation bombs, as well as their ballistic characteristics, create specific requirements for the guidance method, which, in order to minimize the energy cost of movement of the corrected bomb in the process of targeting the object, mini-mally deviated from ballistic. The article discussed the algorithms for processing the navigation parameters of the flight, obtained using the satellite navigation system receiver, to implement on their basis the method of proportional homing of the corrected aerial bomb on a fixed ground target, the coordinates of which are known in advance. It is shown that for guidance in the horizontal plane it is possible to use the method of proportional homing in the classical form, and for pointing in the vertical plane the method of proportional homing should be modified. This is explained by the fact that the homing channels of the adjustable bomb in the hori-zontal and vertical planes have significant differences, which consist in the need to take into account the effect of the force of the earthly gravity on the process of pointing in a vertical plane and the absence of this force in the horizontal plane. When forming the parameter for adjusting the adjustable bomb according to an algorithm that corresponds to the “classical” method of proportional homing, there is a systematic premature reduction in the flight path of the adjustable bomb and, as a result, its systematic shortfalls to the ground target. In order to avoid premature loss of flight altitude during the guidance of a corrected bomb, it becomes neces-sary to apply a modified proportional guidance method is performed by using an insert. Today there are examples of using inserts in the form of constant coefficients to form a given trajectory. However, modeling the process of targeting a corrected aerial bomb shows that such an approach provides satisfactory guidance characteristics only in a narrow range of altitudes and speeds of the carrier when using a corrected bomb. In order to achieve the required precision characteristics of a corrected bomb in a wide range of heights and speeds of the carrier at the time of its application, a functional dependence of the insert value on the height and speed of the carrier at the moment of dropping the corrected bomb was obtained using mathematical modeling. The results of the simula-tion of the guidance of a corrected aerial bomb by the proposed algorithms showed that the accuracy of the guidance satisfies mod-ern requirements for weapons, which satellite navigation systems are used for control.


Keywords: corrected aviation bomb, proportional homing method, satellite navigation system, ground target, guidance pa-rameter.

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Reference:
 Kravchuk, I.S. and Taranenko, V.V. (2019), “Realizatsiia proportsiinoho samonavedennia korektovanoi aviatsiinoi bomby za informatsiieiu suputnykovoi systemy navihatsii” [Realization of proportional self-homing of the corrected aerial bomb according to the information of the satellite navigation system], Science and Technology of the Air Force of Ukraine, No. 3(36), pp. 73-78. https://doi.org/10.30748/nitps.2019.36.08.