RU2367893C2 - Method to increase surviability of drone planes in radar counteraction and active target kill zones (versions) - Google Patents

Abstract

FIELD: weapons.

SUBSTANCE: invention relates to system designed to increase survivability of drone planes (DP). Proposed method comprises generating signals sent in false directions with the help of opening traps arranged on shoot-off cartridges with pyro charge and accommodated on DP fuselage, and stochastic variation of aircraft course. If DP is locked after it overcomes 1/3 to 1/2 of flight to target, enemy radar system operation is dropped out by stochastic change of DP course and simultaneous change of DP radar reflection by shooting off opening traps. Note here that trap shoot-off is made on the side opposite to DP course change. Note also that shoot-off traps re-reflect enemy radar signals to enemy fire control center in enemy frequencies and with the enemy polarisation mode. DP course is directed towards target, on final part of DP trajectory, with shoot-off of traps.

EFFECT: higher probability of overcoming enemy anti-aircraft system.

2 cl

Description

The invention relates to a system for increasing the survivability of control of unmanned aerial vehicles (UAVs) - missile projectiles that overcome radio countermeasures and active destruction by disrupting auto tracking in the direction of enemy radio and active systems in the UAV launch zone, during UAV flight along the path to the target and in UAV rapprochement zone (mainly air and sea targets, in which the target and anti-aircraft defense are located in one place) with the target.

A known method for guiding a projectile and a device for its implementation, comprising a ground-based radar station, a radiolucent head fairing, a monopulse antenna operating in an equal signal zone mode, a gyrostabilized platform rigidly connected to a monopulse antenna, a receiver and a computing device. The method consists in the implementation of ground-based radar illumination of the target, and the guidance of the projectile is carried out by an echo signal reflected from the target using the on-board direction finder (the so-called semi-active method of aiming the projectile) (US Patent No. 5149011, IPC F41G 7/28, 1993 - [1] )

A known method of guiding a projectile by a command method and a device for its implementation, comprising a ground-based radar, an antenna device of a control channel, a transceiver and an on-board computing device (- [1] and FR, application No. 2639102, IPC F41G 7/30, 1986 - [2]) . The method consists in controlling the projectile according to commands from the control post according to the data received from the ground-based radar.

There is a known method for guiding a projectile and a device for its implementation, comprising a radio-transparent head fairing, a monopulse antenna operating in the equal signal zone mode, a gyrostabilized platform rigidly connected to a monopulse antenna, an receive-transmit antenna switch, a receiver, a transmitter, an on-board computing device (US патент patent No. 5232182, IPC F41G 7/28, 1993 - [3]). The method consists in homing the projectile and correcting its course in violation of the equality of the signal from the equal-signal zones.

There are also known methods of guiding the projectile by combined methods using both command and semi-active and active guidance and devices for their implementation (RU, patent No. 2100746, IPC F41G 7/28, 1993 - [4]). The device contains a multifunctional radar, a dual-band radio-transparent projectile head fairing, a dual-band monopulse antenna, a gyro-stabilized platform rigidly connected to a monopulse antenna, an receive-transmit antenna switch, a receiver, a transmitter, a frequency synthesizer, a control channel transponder with antenna devices, and an on-board digital computer. The method consists in combining three guidance methods: semi-active, active and team guidance.

Closest to the claimed invention is a method of increasing the survivability of unmanned aerial vehicles that overcome the air defense system described in RU patent for utility model “Cruise missile with a device for ejection of false targets” No. 23100 U1, 05.20.2002, [5], which also solves the task of reducing the loss of cruise missiles (increasing the survivability of unmanned aerial vehicles) in the air defense system of the target cover (p.1 of the source [5]), while approaching the target with a pyrotechnic release device, false targets are released d. A cruise missile (RC) equipped with a false target (LC) ejection device, when approaching the target with a command from the on-board control system, activates an ejection device (for example, pyrotechnic), which, according to a special algorithm, sequentially ejects RC from unitary cartridges. After separation of the LC, they provide protection of the Kyrgyz Republic from air defense systems in the radar and infrared wavelength ranges. The main characteristics of the LC, ensuring its similarity to the Raman in the radar and infrared wavelength ranges, the interval between successive emissions, the emission rate is determined by the visibility characteristics of the LC and Raman in the given wavelength ranges, the lifetime of the LC, its ballistic characteristics, as well as the possibility of information and fire air defense equipment for their selection. The number of LCs placed on board a missile is determined by the airspeed of the Kyrgyz Republic in the area of the target, the depth of the air defense system of the target cover and the required interval between successive emissions. A sign that is a common proposed invention and prototype is the shooting of false targets.

However, this method is not effective enough to disrupt auto tracking after they are detected by radar. The technical effect to which the claimed invention is directed is to increase the likelihood that the aircraft overcomes the affected area of the anti-aircraft missile system by creating disturbances along the tracking loop, which disrupts the auto-tracking process of the aircraft as a target and avoids the line of sight.

The technical effect in the method of increasing the survivability of unmanned aerial vehicles, overcoming the zones of electronic countermeasures and active destruction, in its first embodiment, including the shooting of false targets, is achieved by using the opening traps made with the possibility of directional and intensive re-reflection back to the radar the weapon control system of the enemy’s probing signals, while the opening traps are placed on the fire hatch with pyrope thrones located on the surface of the body of an unmanned aerial vehicle, and in the period after an unmanned aerial vehicle passes from the first third to half the distance to the target, its course is stochastically changed to malfunction the enemy’s radar system and at the same time they shoot out traps for short-term changes in the radar reflection of the aircraft in the opposite direction to a change in the course of the unmanned aerial vehicle, and in the final part flight paths of an unmanned aerial vehicle from one third to half of a new approach distance set the course of an unmanned aerial vehicle directly to a target without traps being shot.

The technical effect in the method of increasing the survivability of unmanned aerial vehicles, overcoming the zones of electronic countermeasures and active defeat, in its second embodiment, including the shooting of false targets, is achieved by using the opening traps made with the possibility of directional and intensive re-reflection back to the radar system as false targets control the enemy’s weapons with its probing signals, while the opening traps are placed on the fire hatches with pyro by us, located on the surface of the body of the unmanned aerial vehicle, and in the period after the unmanned aerial vehicle passes from the first third to half the distance to the target, its course is stochastically changed to malfunction the enemy’s radar system and at the same time they shoot open traps for a short-term change in the radar reflection of the aircraft in the opposite direction to a change in the course of the unmanned aerial vehicle, on a section of the trajectory the unmanned aerial vehicle’s flight from one third to half the remaining approach distance for the purpose of performing a second shooting of the opening traps and at the same time stochastically change the course of the unmanned aerial vehicle, in the final section of the unmanned aerial vehicle’s flight path from one third to half of the new approach distance set the course of the unmanned aerial vehicle apparatus directly to the target without shooting traps.

A way to increase the survivability of unmanned aerial vehicles that overcome the zones of electronic countermeasures and active destruction for both options is to misinform the enemy by changing the UAV course and creating false traps. The method can be carried out using various devices. For example, combined methods using both command and semi-active and active guidance and devices for their implementation [1-4]. Signals are generated in false directions by opening traps located on hatches with pyro-cartridges located on the surface of the body of the unmanned aerial vehicle that are fired in the given order and by a stochastic change in the course of the aircraft.

The method is intended to overcome the zone of electronic countermeasures and active destruction of mainly air and sea targets, in which the target and anti-aircraft defense are located in one place.

The essence of the method for both options is as follows.

When the enemy detects the aircraft’s radar after the aircraft passes the first third to half the distance to the target, the first action is carried out, which includes a stochastic change in the course of the unmanned aerial vehicle to malfunction the enemy’s radar system and produce the first shooting of traps that open for a short-term change in the radar reflection of the aircraft . This can be realized by opening traps located on hatches with pyro-cartridges that are shot in the given order and located on the surface of the body of the unmanned aerial vehicle. Moreover, the first shooting of the opening traps is carried out in the direction opposite to the change in the course of the aircraft, while by means of the traps shot in false directions, their probe signals with their frequency and polarization are directed and intensively reflected back to the enemy’s radar control system.

This can be realized using a device containing small-sized elements - drop-down traps, which are radar reflectors that interfere with enemy radar. The effect is achieved in that each trap is made of a cubic shape from a thin dielectric film metallized on the inside, folded into a flat envelope bag. On the six outer faces of the dielectric film forming a cube — by printing — by metallization, systems of pairs of flat miniature, broadband, receiving and intensely re-emitting in the opposite direction probing enemy radar signals with their frequency and polarization, fractal antennas, such as Sierpinski carpet, connected according to the scheme are applied Van Atta Printed Transfer Lines. Inside the trap is a can of gas with a punctured stopper. Traps are attached to the inside of curved hatches placed in a predetermined quantity, for example, four, and fired by squibs in the established order, for example, in pairs placed on the surface of an unmanned aerial vehicle.

The indicated distance, equal from one third to half of the trajectory, is selected from the assumption that the enemy during the passage of this section of the UAV trajectory does not have time to hit him, since the speeds of anti-ballistic missiles are comparable with the speed of the UAV. Thus, a change in course and the release of traps create disorientation of the enemy. At the same time, the enemy hardly has time to react to the new UAV course parameters, i.e. she does not have time to qualitatively measure the new parameters of the UAV course, to calculate and make the appropriate correction for her missile defense systems. The error of the enemy’s actions increases, which increases the survivability of the UAV and increases the likelihood of achieving the goal.

The second shooting for the method according to the second variant of the opening traps is carried out in the next section of the trajectory from one third to half of the remaining distance of approach with the target and also simultaneously stochastically change the course of the unmanned aerial vehicle.

In the final section, for both variants of the aircraft trajectory, from one third to half of the new approach distance, they aim the course of the unmanned aerial vehicle directly at the target, and traps are not shot at the same time.

Shooting traps is usually accompanied by an abrupt change in the value of the effective reflecting surface, which at the last stage of the trajectory unmasks the UAV and creates favorable conditions for anti-aircraft weapons, indicating the approximate direction to the UAV, so at the last stage such an action as shooting traps is impractical.

The implementation of the proposed method for both options does not cause fundamental difficulties, since existing missile systems are equipped with appropriate devices capable of implementing this method [1-4].

Compared with the prototype, this method allows to increase the likelihood of an aircraft overcoming the zone of defeat of an anti-aircraft missile system by creating disturbances along the tracking loop, which disrupts the process of auto-tracking of the aircraft as a target, and avoids the line of sight.

Claims (2)

1. A way to increase the survivability of unmanned aerial vehicles, overcoming areas of electronic countermeasures and active defeat, including the shooting of false targets, characterized in that as false targets use the opening traps made with the possibility of directional and intensive re-reflection back to the radar control system of the enemy’s weapon probing it signals, while the opening traps are located on the fire hatches with pyrocartridges located on the surface of the core a mustache of an unmanned aerial vehicle, and in the period after the unmanned aerial vehicle has traveled from the first third to half the distance to the target, its course is stochastically changed to malfunction the enemy’s radar system and at the same time they shoot open traps for a short-term change in the aircraft’s radar reflection in the opposite direction to the change the course of the unmanned aerial vehicle, and in the final section of the flight path of the unmanned aerial nogo unit from one third to one half of the new range of convergence with a view to establish the course of the unmanned aerial vehicle directly at the target without shooting traps. 2. A way to increase the survivability of unmanned aerial vehicles that overcome the zones of electronic countermeasures and active destruction, including the shooting of false targets, characterized in that as false targets use the opening traps made with the possibility of directional and intensive re-reflection back to the radar control system of the enemy’s weapon probing it signals, while the opening traps are located on the fire hatches with pyrocartridges located on the surface of the core a mustache of an unmanned aerial vehicle, and in the period after an unmanned aerial vehicle passes from the first third to half the distance to the target, its course is stochastically changed to malfunction the enemy’s radar system and at the same time they shoot out traps for a short-term change in the aircraft’s radar reflection in the opposite direction to the change course of an unmanned aerial vehicle, on a portion of the flight path of an unmanned aerial vehicle At the same time, from one third to half of the remaining approach distance, for the purpose, they make a second shooting of the opening traps and simultaneously stochastically change the course of the unmanned aerial vehicle, in the final section of the flight path of an unmanned aerial vehicle from one third to half of the new approach distance set the course of the unmanned aerial vehicle directly at target without shooting traps.