RU2419060C2 - Infrared missile seeker non-sensitive to generators of infrared pulse interference - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: infrared missile seeker includes one photoreceiver located separately from photoreceivers arranged on rotating rotor of coordinator after optic diagram in the form of a slot. The above photoreceiver transmits the received pulse signal from generator of infrared pulse interference to signal amplification unit, and then to control unit of missile rudders and interrupts the signal from photoreceivers arranged on rotating rotor.

EFFECT: improving interference immunity against infrared pulse interference.

1 dwg

Description

The invention relates to rocket technology and can be used for military purposes.

A device is known "Man-portable air defense missile system 9K38" Igla ", 1983" Internet: http://www.ruspodvig.ru/sssr/gun/rocket/pzrk83/.

In the process of creating the Igla complex, a number of complex technical problems were solved, such as:

ensuring noise immunity due to the selection of targets against the background of artificial interference through the use of a fundamentally new two-channel optical homing head with a logical block for selecting true targets against interference;

a twofold increase in the prelaunch sensitivity of the homing missile head in comparison with the missile head of the Igla-1 complex, which made it possible to provide an acceptable target destruction zone at oncoming courses and to provide effective firing of targets before they perform a combat mission;

the creation of signal preamplifiers from photodetectors placed on the rotary rotor of the coordinator, which, together with other activities, provided an increase in the sensitivity of the seeker;

creation of low-current silent collectors and current collectors for transmitting signals from photodetectors to the electronic block of the homing head, which also contributed to increasing the sensitivity of the seeker;

creation of a deep cooling system for a rotating photodetector, which also provided an increase in the sensitivity of the seeker;

ensuring acceptable protection of the seeker from background noise while increasing the sensitivity of the head;

creation of a single trigger mechanism for the Igla and Igla-1 complexes without increasing its mass;

ensuring the required accuracy of guidance and displacement of the center of grouping of missile hit points by using information from the homing head with a pulse signal processing circuit from the target, which allowed spatial selection of the true target and increased efficiency of its destruction by getting the fragmentation stream into more vulnerable ones compared to the nozzle in part, design elements of the target (analogue).

Disadvantages. Unreliable operation of the homing head when operating infrared countermeasures, for example, from a pulsed infrared interference generator.

The device is known "Anti-aircraft missile system" Strela-10 "," Internet: http://www.morpeh.com/mp-targets/podrazdeleniya/78-pvo/273-zrk-9a34-qstrela-10q.html, SAM 9A34 " Arrow 10 ".

The anti-aircraft guided missile of the Strela-10 complex is made according to the aerodynamic design of a duck. It consists of a homing head, autopilot, explosive device, non-contact target sensor, propulsion system, container. The homing head works in two channels: infrared and photo-contrast. The launch mass of the rocket is 39.6 kg, the weight of the warhead is 3 kg. The length of the rocket is 2190 mm, caliber 123 mm. The upgraded version of the Strela-10 anti-aircraft missile system was also adopted. So, in 1979 the Strela-10M anti-aircraft missile system appeared, and in 1981 the Strela-10M2 anti-aircraft missile system (analogue).

Disadvantages. Unreliable operation of the homing head during the operation of infrared countermeasures, for example, from a pulsed infrared interference generator.

A known application for the invention "Passive infrared homing rotary missile" No. 2001109141/02, A, 04/05/2001, RU, IPC ⁷ F42B 15/01, F41G 7/22. Application publication date 02.27.2003. Correspondence address: 300001, Tula, Shcheglovskaya Zaseka, GUN "KBP", patent department. Applicant: State Unitary Enterprise "Instrument Design Bureau" Authors: Shipunov Arkady Georgievich, Babichev Viktor Ilyich, Ovsenev Sergey Sergeevich, Chausov Eduard Vasilievich, Ivanov Vyacheslav Viktorovich, Filimonov Vladimir Yakovlevich, Semashkina Raisa Mikhailovna.

Summary: A passive infrared homing head of a rotating rocket containing an optically coupled lens connected to a cooled linear array of photosensitive elements, an electronic switch, an analog-to-digital converter, random access memory, a target selector and an amplifier, the output of which is connected to the moment sensors of a three-stage corrected gyroscope and with the input of missile control equipment, characterized in that sequentially connected a matrix element switch and a matrix element coordinate converter from a polar to a Cartesian coordinate system, wherein the switch output is also connected to the second input of the electronic switch, the second coordinate converter input is connected to the output of the rocket roll angle sensor, and the output is connected to the second inputs of random access memory and selector goals, with the lens and the matrix mounted on the inner frame of the gimbal gimbal, and the matrix has a longitudinal size equal to the diameter of the object’s field of view willow in the focal plane (pototype).

Disadvantages. Unreliable operation of the homing head when operating infrared countermeasures, for example, from a pulsed infrared interference generator.

The technical solution of the thermal homing head (TGS) of a rocket insensitive to infrared pulsating noise generators is achieved by the fact that one photodetector is located separately from the photodetectors placed on the coordinator’s rotary rotor after the slit-shaped optical diaphragm and it transmits the received pulse signal from the pulsed infrared generator interference in the signal amplification unit, in the control unit of the rudder of the rocket and interrupts the signal from the photodetectors placed on a rotating rotor. Since one of the coordinator’s photodetectors works in resonance with the pulse frequency of the interference generator and it has a large signal power, and the signal from the photodetector interrupts the rudder control signal, thereby making this signal of the interference generator invisible to rocket equipment. Those. disabling and turning on the rocket control equipment occurs synchronously with the frequency of the interference generator. TGS just stops seeing the jammer.

Infrared countermeasures in military aviation to counter missiles with an infrared homing head (IKGSN), such as R-27 (E) T, R-60, R-73, MANPADS missiles; Two types of interference are used - fired false thermal targets (LTC) and stationary pulsed infrared interference generators. False heat targets are also known as "heat traps." False thermal targets are pyrotechnic devices that generate a large amount of heat during the combustion of a combustible composition. Structurally, they are a small container with a solid combustible composition (pyrophoric or pyrotechnic) - the design, in principle, is similar to the stars of signal or lighting rockets. They are fired back (once or continuously, up to the exhaustion of the LTC stock) from the corresponding device on board the aircraft. When such a false target appears in the guidance field, the rocket re-targets a more powerful thermal signal. It should be noted that some types of homing heads (in particular, ultraviolet) can distinguish the spectral characteristics of radiation from an aircraft and aircraft. The pulsating infrared interference generator is a powerful infrared lamp with a rotating reflector, in a casing of material transparent to infrared radiation, located on the body of the protected object. Missiles with an infrared homing head are among the simplest guided weapons for hitting air targets. When generating pulsed infrared interference with a frequency equal to the working frequency of the internal guidance elements and a power comparable to the natural thermal radiation of the protected target, interference is introduced into the missile guidance system, leading to the missile deflecting from the protected target. An example of a pulsed infrared interference generator ALQ-144 Hot Brick on the fuselage of the OV-10D Bronco.

Material Internet: from Wikipedia, the free encyclopedia, Current version.

The drawing shows a General diagram of a thermal homing head (TGS) missiles.

Statics

The rocket’s thermal homing head (TGS) is characterized in that one photodetector is located separately from the photodetectors placed on the coordinator’s rotary rotor after the slit-shaped optical diaphragm, and it transmits the received pulse signal from the pulsed infrared noise generator to the signal amplification unit, to the control unit rudders rocket and interrupts the signal from the photodetectors placed on a rotating rotor.

Work

The thermal homing head (TGS) of the rocket (1) is characterized in that one photodetector (2) is located separately from the photodetectors (3) located on the rotary rotor (4) of the coordinator (5) after the optical diaphragm in the form of a slit (10) and it transmits the received pulse signal from the generator (6) of pulsed infrared interference to the signal amplification unit (7), to the rudder control unit (8) of the rocket (9) and interrupts the signal from photodetectors (3) located on the rotating rotor (4).

Since one of the photodetectors (3) of the coordinator (5) works in resonance with the frequency of the pulses of the interference generator (6) and it (3) has a large signal power, and the signal from the photodetector (2) interrupts the steering signal (8) , thereby making this signal of the interference generator (6) invisible to rocket equipment (9). Those. the rocket control equipment is turned off and on in synchronization with the frequency of the interference generator, the TGS simply ceases to see the interference generator.

Feasibility Study

The proposed homing head is insensitive to countermeasures, which means that the damaging effect of the rocket will increase many times over. Given the high cost of missiles, this dramatically reduces the cost of spending on military operations in the air.

List of items

1 - Homing heat head

2 - photodetector on the rotor (4)

3 - photodetector

4 - rotating rotor (4)

5 - coordinator

6 - generator pulsating infrared interference

7 - signal amplification unit

8 - steering wheel controls

9 - rocket

10 - slit-shaped optical diaphragm

Claims (1)

The rocket’s thermal homing head, characterized in that one photodetector is located separately from the photodetectors placed on the coordinator’s rotary rotor after the slit-shaped optical diaphragm, and it transmits the received pulse signal from the pulsed infrared noise generator to the signal amplification unit, to the control unit rudders of the rocket’s direction and interrupts the signal from photodetectors placed on a rotating rotor, thereby making this signal of the interference generator invisible to the equipment of the rocket.