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During World War II, Project Pigeon (later Project Orcon, for "organic control") was American behaviorist B. F. Skinner's attempt to develop a pigeon-controlled guided bomb. [1]
The testbed was the same National Bureau of Standards-developed, unpowered airframe that was later used for the US Navy's radar-guided "Bat" glide bomb, which was basically a small glider, with wings and tail surfaces, an explosive warhead section in the center, and a "guidance section" in the nose cone. The intent was to train pigeons to act as "pilots" for the device, using their cognitive abilities to recognize the target. The guidance system consisted of three lenses mounted in the nose of the vehicle, which projected an image of the target on a screen mounted in a small compartment inside the nose cone. This screen was mounted on pivots and fitted with sensors that measured any angular movement. One to three pigeons, trained by operant conditioning to recognize the target, were stationed in front of the screen; when they saw the target, they would peck at the screen with their beaks. They were trained by being shown an image of the target and gradually more and more rapid pecks were required for a grain of food. One bird pecked more than 10,000 times in 45 minutes (Note 2/20/89 BFSkinner Foundation and author's collection.) [2] As long as the target remained in the center of the screen, the screen would not move, but if the bomb began to go off track, the image would move towards the edge of the screen. The pigeons would follow the image, pecking at it, which would move the screen on its pivots. In the case where two possible targets were on the screen, Skinner noted that at least two of the birds would be in agreement and the third would be "punished for his minority opinion" to encourage it to steer towards the target preferred by the majority of the pigeons. [3]
The sensors would detect the movement and send signals to the control surfaces, which would steer the bomb in the direction the screen had moved. As the bomb swung back towards the target, the pigeons would again follow the image, bringing the screen back to the centered position again. In that way, the pigeons would correct any deviations in the course and keep the bomb on its glide path.
Early electronic guidance systems use similar methods, only with electronic signals and processors replacing the birds in detecting the target and preventing deviation from the glide path.
The National Defense Research Committee saw the idea to use pigeons in glide bombs as very eccentric and impractical, but still contributed $25,000 to the research. Skinner, who had some success with the training, complained: "our problem was no one would take us seriously". [4] The program was canceled on 8 October 1944, because the military believed that "further prosecution of this project would seriously delay others which in the minds of the Division have more immediate promise of combat application". Project Pigeon was briefly revived by the Navy in 1948 as "Project Orcon," but it was again cancelled in 1953 when the reliability of electronic guidance systems was proven.
Skinner was awarded the 2024 Ig Nobel Peace Prize for his work on the project; his daughter Julie Vargas, who received the award in his stead, is quoted as saying, "I want to thank you for finally acknowledging his most important contribution. People know him only for discovering operant conditioning, schedules of reinforcement, and for books like Walden Two , Verbal Behavior , Beyond Freedom D , and more. Even the B.F. Skinner Foundation fails to put a missile on its hat, so thank you for finally putting the record straight." [5]
Burrhus Frederic Skinner was an American psychologist, behaviorist, inventor, and social philosopher. He was the Edgar Pierce Professor of Psychology at Harvard University from 1958 until his retirement in 1974.
An operant conditioning chamber is a laboratory apparatus used to study animal behavior. The operant conditioning chamber was created by B. F. Skinner while he was a graduate student at Harvard University. The chamber can be used to study both operant conditioning and classical conditioning.
The Rockwell International Guided Bomb Unit 15 is an unpowered glide weapon used to destroy high-value enemy targets. It was designed for use with F-15E Strike Eagle, F-111 'Aardvark' and F-4 Phantom II aircraft. The GBU-15 has long-range maritime anti-ship capability with the B-52 Stratofortress.
A glide bomb or stand-off bomb is a standoff weapon with flight control surfaces to give it a flatter, gliding flight path than that of a conventional bomb without such surfaces. This allows it to be released at a distance from the target rather than right over it, allowing a successful attack without exposing the launching aircraft to anti-aircraft defenses near the target. Glide bombs can accurately deliver warheads in a manner comparable to cruise missiles at a fraction of the cost—sometimes by installing flight control kits on simple unguided bombs—and they are very difficult for surface-to-air missiles to intercept due to their tiny radar signatures and short flight times. The only effective countermeasure in most cases is to shoot down enemy aircraft before they approach within launching range, making glide bombs very potent weapons where wartime exigencies prevent this.
Pigeons have featured in numerous experiments in comparative psychology, including experiments concerned with animal cognition, and as a result there is considerable knowledge of pigeon intelligence.
Missile guidance refers to a variety of methods of guiding a missile or a guided bomb to its intended target. The missile's target accuracy is a critical factor for its effectiveness. Guidance systems improve missile accuracy by improving its Probability of Guidance (Pg).
A head-up display, or heads-up display, also known as a HUD or head-up guidance system (HGS), is any transparent display that presents data without requiring users to look away from their usual viewpoints. The origin of the name stems from a pilot being able to view information with the head positioned "up" and looking forward, instead of angled down looking at lower instruments. A HUD also has the advantage that the pilot's eyes do not need to refocus to view the outside after looking at the optically nearer instruments.
Infrared homing is a passive weapon guidance system which uses the infrared (IR) light emission from a target to track and follow it seamlessly. Missiles which use infrared seeking are often referred to as "heat-seekers" since infrared is radiated strongly by hot bodies. Many objects such as people, vehicle engines and aircraft generate and emit heat and so are especially visible in the infrared wavelengths of light compared to objects in the background.
The ASM-N-2 Bat was a United States Navy World War II radar-guided glide bomb which was used in combat beginning in April 1945. It was developed and overseen by a unit within the National Bureau of Standards with assistance from the Navy's Bureau of Ordnance, the Massachusetts Institute of Technology, and Bell Telephone Laboratories. It is considered to be the first fully automated guided missile used in combat.
Shaping is a conditioning paradigm used primarily in the experimental analysis of behavior. The method used is differential reinforcement of successive approximations. It was introduced by B. F. Skinner with pigeons and extended to dogs, dolphins, humans and other species. In shaping, the form of an existing response is gradually changed across successive trials towards a desired target behavior by reinforcing exact segments of behavior. Skinner's explanation of shaping was this:
We first give the bird food when it turns slightly in the direction of the spot from any part of the cage. This increases the frequency of such behavior. We then withhold reinforcement until a slight movement is made toward the spot. This again alters the general distribution of behavior without producing a new unit. We continue by reinforcing positions successively closer to the spot, then by reinforcing only when the head is moved slightly forward, and finally only when the beak actually makes contact with the spot. ... The original probability of the response in its final form is very low; in some cases it may even be zero. In this way we can build complicated operants which would never appear in the repertoire of the organism otherwise. By reinforcing a series of successive approximations, we bring a rare response to a very high probability in a short time. ... The total act of turning toward the spot from any point in the box, walking toward it, raising the head, and striking the spot may seem to be a functionally coherent unit of behavior; but it is constructed by a continual process of differential reinforcement from undifferentiated behavior, just as the sculptor shapes his figure from a lump of clay.
Instinctive drift, alternately known as instinctual drift, is the tendency of an animal to revert to unconscious and automatic behaviour that interferes with learned behaviour from operant conditioning. Instinctive drift was coined by Keller and Marian Breland, former students of B.F. Skinner at the University of Minnesota, describing the phenomenon as "a clear and utter failure of conditioning theory." B.F. Skinner was an American psychologist and father of operant conditioning, which is a learning strategy that teaches the performance of an action either through reinforcement or punishment. It is through the association of the behaviour and the reward or consequence that follows that depicts whether an animal will maintain a behaviour, or if it will become extinct. Instinctive drift is a phenomenon where such conditioning erodes and an animal reverts to its natural behaviour.
The Henschel Hs 294 was a guided air-to-sea missile developed by Henschel Flugzeug-Werke in Germany during World War II.
Lei Shi, abbreviated as LS, is a series of precision-guided munitions (PGM) developed by Luoyang Optoelectro Technology Development Center (LOTDC), a subsidiary of Aviation Industry Corporation of China (AVIC). Leishi is a type of guidance kit that can modify existing unguided bomb into guided standoff munition. These maneuverable guided bombs are similar in roles to the American Joint Direct Attack Munition (JDAM) kit but with longer ranges.
A precision-guided munition (PGM), also called a smart weapon, smart munition, or smart bomb, is a type of weapon system that integrates advanced guidance and control systems, such as GPS, laser guidance, or infrared sensors, with various types of munitions, typically missiles or artillery shells, to allow for high-accuracy strikes against designated targets. PGMs are designed to precisely hit a predetermined target, typically with a margin of error that is far smaller than conventional unguided munitions. Unlike unguided munitions, PGMs use active or passive control mechanisms capable of steering the weapon towards its intended target. PGMs are capable of mid-flight course corrections, allowing them to adjust and hit the intended target even if conditions change. PGMs can be deployed from various platforms, including aircraft, naval ships, ground vehicles, ground-based launchers, and UAVs. PGMs are primarily used in military operations to achieve greater accuracy, particularly in complex or sensitive environments, to reduce the risk to operators, lessen civilian harm, and minimize collateral damage. PGMs are considered an element of modern warfare to reduce unintended damage and civilian casualties. It is widely accepted that PGMs significantly outperform unguided weapons, particularly against fortified or mobile targets.
Animal-borne bomb attacks are the use of animals as delivery systems for explosives. The explosives are strapped to a pack animal such as a horse, mule or donkey. The pack animal may be set off in a crowd.
Sudarshan is an Indian laser-guided bomb kit, developed by Aeronautical Development Establishment (ADE), a DRDO lab with technological support from another DRDO lab Instruments Research and Development Establishment (IRDE), for the Indian Air Force (IAF).
The Vickers Blue Boar was a family of British air-launched television-guided glide bombs of the 1950s which was cancelled during development. A key role was as an anti-shipping missile, using its guidance system to attack the moving targets. It would also replace unguided bombs between 5,000 and 10,000 lb against point targets, or be equipped with a nuclear warhead. A smaller 1,000 lb (450 kg) version was also developed for testing. The name is a randomly assigned rainbow code.
In the field of weaponry, terminal guidance refers to any guidance system that is primarily or solely active during the "terminal phase", just before the weapon impacts its target. The term is generally used in reference to missile guidance systems, and specifically to missiles that use more than one guidance system through the missile's flight.
Optical contrast seekers, or simply contrast seekers, are a type of missile guidance system using a television camera as its primary input. The camera is initially pointed at a target and then locked on, allowing the missile to fly to its target by keeping the image stable within the camera's field of view.
Television guidance (TGM) is a type of missile guidance system using a television camera in the missile or glide bomb that sends its signal back to the launch platform. There, a weapons officer or bomb aimer watches the image on a television screen and sends corrections to the missile, typically over a radio control link. Television guidance is not a seeker because it is not automated, although semi-automated systems with autopilots to smooth out the motion are known. They should not be confused with contrast seekers, which also use a television camera but are true automated seeker systems.
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