RU2538413C1 - False target - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: technical solution is based on forming a collapsible elastic envelope using a residual gas, said envelope being provided with cylindrical protrusions of different length which is a multiple of the wavelength in the wavelength range of the probing radar station. The protrusions are linked by one end to the inner volume of the envelope, and their other end is plugged and is the form of a hemisphere. In a collapsed state, the envelope is released from a launching apparatus mounted on spacecraft.

EFFECT: providing an optimum value of a reflected signal for effective identification of an object.

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Description

The invention relates to the field of devices for radar masking of spacecraft (SC) in unsupported space.

There are various devices and methods for masking spacecraft that distort the radar and optical characteristics of a masked object, including using false targets - tethered, detachable, etc.

Light false targets are inflatable or mesh designs. When folded, they occupy a small volume and have a small mass. They are installed on a space object in a folded form, then separated from the object. In flight, various forms are revealed and take on, including the possibility of taking the form of a spacecraft or combat unit, which are practically indistinguishable from the original.

The inflatable false target is designed to simulate or distort in unsupported space (the extra-atmospheric portion of the flight of a space object) the radar characteristics of real space objects.

False targets are also known - interference-type reflectors, which consist of many diffractive elements. As diffraction elements there may be protrusions on a reflective surface (VD Velikanov "Radio engineering systems in rocket technology", 1974).

Radar masking device methods were analyzed using the following sources:

V.A. Gorbunov "The effectiveness of target detection", M., 1980;

S.A. Vakin, A.N. Shustov "Fundamentals of Radio Countermeasures", M., 1968;

V.G. Nebabin, V.V. Sergeev "Methods and techniques of radar recognition", M., 1968;

V.D. Velikanov et al. "Radio engineering systems in rocket technology", Moscow, Moscow, 1974.

Patents pending: 3860927 cells. 343-48 (US), 3283328 cells. 343-70 (US), 4414339 G21F 1/10, 4865328 F41J 9/08 (US), UK Patents 2,134,740 NKI-N4D.

There are many inflatable targets of cl. F41J 9/08, camouflage devices using inflatable shells, for example RF patent No. 2074403 - using an inflatable metallized shell, towed false target - RF patent 2206049, K41J 9/10.

As a prototype, the false target of the patent 2074403 (RF), made in the form of an inflatable metallized shell, is considered.

The purpose of the invention is to create a false object that simulates a complex object.

оптимальное значение отраженного сигнала для эффективной идентификации объекта.The goal in the proposed solution is achieved in that the false target simulates an ambiguous complex object in the entire wavelength range of the probing radar by forming protruding elements in the false target that are multiples of one quarter of the wavelength of the probing radar station, since $$\frac{\lambda }{\mathrm{four}}$$

the optimal value of the reflected signal for effective identification of the object.

In this case, of course, the execution of each false target is guided by the alleged radars observing the masked object.

The main feature and difference of the proposed technical solution is as follows: the shell after being thrown into space is formed by residual gas, the outer surface of the inflatable shell is provided with hollow cylindrical protrusions having an end and a side surface communicated at one end with the inner volume of the shell and a sealed upper end.

Moreover, to create interference in all ranges of the probing radar station (radar), the height of the protrusions is different and a multiple of a quarter of the wavelength in the entire range of the radar wave, and the upper ends of the hollow protrusions are hemispherical, which interferes with any polarization of the radar probe signal. The number of protrusions is selected in proportion to the number of station wavelengths.

The false target is installed on the spacecraft (object) in the folded state in the container or in another way, then, in accordance with commands from the Earth or the flight task, the false target is separated from the space object.

In the following embodiment of the device is a false target, it is made in the form of a spherical inflatable shell with hollow protrusions.

In principle, the shape of the shell can be any, including imitating a fully cosmic object or its individual element.

The proposed false target is presented in figure 1 and contains: shell 1, hollow protrusions 2 of different heights, a multiple of a quarter of the wavelength (λ) in the radar wavelength range.

Figure 2 presents: the launch device 3, the launch mechanism 4, connected by a rod 5 with the cover 6 of the launch device, and an element of the space object 7.

The device operates as follows: on command from the Earth or from a space object (KO), the trigger mechanism 4 is triggered, pushing the shell 1 and opening the cover (shutter) 6 of the launch device 5.

List of sources used

1. V.A. Gorbunov "The effectiveness of target detection", M., 1980.

2. S.A. Vakin, A.N. Shustov "Fundamentals of radio countermeasures", M., 1968.

3. V.G. Nebabin, V.V. Sergeev "Methods and techniques of radar recognition", M., 1968.

4. V.D. Velikanov et al. "Radio engineering systems in rocket technology", Moscow, Moscow, 1974.

5. Patent No. 3860927 class. 343-48 (US).

6. Patent No. 3283328 cl. 343-70 (US).

7. Patent No. 4414339 G21F 1/10.

8. Patent No. 4865328 F41J 9/08 (US).

9. Patent No. 2074403, F41J 9/08, RF.

10. Patents of Great Britain No. 2134740 NKI-N4D.

Claims (2)

1. A false target containing an inflatable shell when folded, characterized in that the surface of the shell has cylindrical hollow protrusions having an end and side surfaces, one end of the protrusions is in communication with the internal volume of the shell, and their end surface is muffled, while the height of the protrusions is a multiple of a quarter each of the wavelengths of the probing location station, and the number of protrusions is selected proportionally to the number of station wavelengths. 2. The device according to claim 1, characterized in that the end surfaces of the protrusions are made in the form of a hemisphere.

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