Infrared Guidence

7/28/2019 Infrared Guidence

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The air to air missile grew out of the unguidedair to air rockets used during 1st World War.

The US Navy and US Air Force began

equipping guided missiles in 1956. Development of these missiles are classified

into 5 generations.

The latest heat seeking designs can lock on totarget from various angles not just from behindwhere the heat signature from the engine isstrongest.


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Guided missiles are self propelled airborneprojectiles carrying a explosive charge andguided flight towards a target.

Missiles are broadly classified based on thelaunch environment and type of guidanceused.

Discover how a missile launched from anairborne aircraft attacks with precision to wipeout an enemy aircraft.


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An air to air missile has various parts asshown below


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The missile is fixed to a launcher which ismounted on the aircraft wings.

When the target is locked , the pilot gives the

fire command and the rocket motor isactivated.

The rocket motor burns up a solid propellantwhich gives the thrust to the missile to glide inthe air.

The fins, wings and the guidance controlsystem controls the missile course.


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Semi-Active Radar Homing


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Active Radar Homing


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Infrared Homing


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The guidance system helps the missile toachieve its target.

The guidance system works with the help of

target seeker which gives 3 parameters Position information

Speed information

Distance information

The target seeker consist of infrared sensorsplaced n the nose of the missile in circularmatrix arrangement which gives the above 3parameters.


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Position Information

The infrared image falls exactly on the center of thenose of the missile.

The position of the target is acquired by calculating theamount of IR radiation falling on the IR sensor matrix.


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Speed Information The speed of the target is estimated by measuring the

time interval between the IR radiation pulses that falls

on the sensors.

Distance Information The distance is measured based on the characteristics

that the strength of the IR signals diminishes as the

distance increases.


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Used in Defense and Warfare

Semi Active Radar Homing Missiles

Aim-7 Sparrow


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Active Radar Homing Missiles

Indias DRDO-AstraBVRAAM

USAs

BoeingHarpoon


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Infrared Homing Missiles

German Luftwaffe IRIS-T

Britains AIM-132ASRAAM


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Greater range and ability to identify smaller

low flying targets like Unmanned aerial vehicle More accuracy

More reliable


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It can easily evaded by flares


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Missiles that are able to distinguish aircraftfrom Infrared countermeasures such as flares

Missiles with more detailed target image

allows targeting of more vulnerable parts of theaircraft instead of just homing in on thebrightest infrared source


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IR missiles are highly decisive

Man portable air defense system also use theseIR missiles

These missiles are also used by the terroristgroups and pose a serious threat to thecommercial airlines


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wikipedia.org

aerospaceweb.org

www.brahmos.com

www.defence.pk


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Infrared Guidence

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