UAVs in a hangar

An unmanned aerial vehicle (UAV) is an aircraft with no onboard pilot. UAVs can be remote controlled aircraft (e.g. flown by a pilot at a ground control station) or can fly autonomously based on pre-programed flight plans or more complex dynamic automation systems. UAVs are currently used for a number of missions, including reconnaissance and attack roles. For the purposes of this article, and to distinguish UAVs from missiles, a UAV is defined as being capable of controlled, sustained level flight and powered by a jet or reciprocating engine. In addition, a cruise missile can be considered to be a UAV, but is treated separately on the basis that the vehicle is the weapon. The acronym UAV has been expanded in some cases to UAVS (Unmanned Aircraft Vehicle System). The FAA has adopted the acronym UAS (Unmanned Aircraft System) to reflect the fact that these complex systems include ground stations and other elements besides the actual air vehicles. Image File history File links Download high resolution version (2320x917, 318 KB) Photo by CM Iraq, Summer 2004 File links The following pages link to this file: Unmanned aerial vehicle ... Image File history File links Download high resolution version (2320x917, 318 KB) Photo by CM Iraq, Summer 2004 File links The following pages link to this file: Unmanned aerial vehicle ... Mixed reconnaissance patrol of the Polish Home Army and the Soviet Red Army during Operation Tempest, 1944 Reconnaissance is the military term for the active gathering of information about an enemy, or other conditions, by physical observation. ... A Tomahawk cruise missile A cruise missile is a guided missile which uses a lifting wing and most often a jet propulsion system to allow sustained flight. ...

History

Front view of a Predator (Reno Air Show)

Main article: History of unmanned aerial vehicles

The earliest such aircraft, the Hewitt-Sperry Automatic Airplane was developed during and after World War I, and a number of advances were made with the technology rush that accompanied the Second World War; these were used both to train anti-aircraft gunners and to fly attack missions. Nevertheless, they were little more than full-sized remote controlled airplanes until the Vietnam era. Lately, with the maturing and miniturization of applicable technologies, interest in such craft has grown within the higher echelons of the US military, as they offer the possibility of cheaper, more capable fighting machines that can be used without risk to aircrews. Initial generations have primarily been surveillance aircraft, but some have already been fitted with weaponry (such as the MQ-1 Predator, which utilizes AGM-114 Hellfire air-to-ground missiles). The military envisions that more and more roles will be performed by unmanned aircraft, initially bombing and ground attack, with air-to-air combat expected to be the last domain of the fighter pilot for now. A weaponized UAV is known as an Unmanned Combat Air Vehicle, or UCAV for short. This article or section may be confusing for some readers, and should be edited to be clearer or more simplified. ... The Hewitt-Sperry Automatic Airplane was a project undertaken during World War I to develop an aerial torpedo, a pilotless aircraft capable of carrying explosives to its target. ... Combatants Allied Powers: France Italy Russia Serbia United Kingdom United States Central Powers: Austria-Hungary Bulgaria Germany Ottoman Empire Commanders Ferdinand Foch Georges Clemenceau Victor Emmanuel III Luigi Cadorna Nicholas II Aleksei Brusilov Herbert Henry Asquith Douglas Haig John Jellicoe Woodrow Wilson John Pershing Wilhelm II Paul von Hindenburg Reinhard... Mushroom cloud from the nuclear explosion over Nagasaki rising 18 km into the air. ... English Electric Canberra PR.9 photo reconnaissance aircraft CP-140 Aurora long-range patrol aircraft of the Canadian Air Force. ... Predator Unmanned Aerial Vehicle flies on a simulated Navy aerial reconnaissance flight off southern California in December 1995. ... AGM-114 Hellfire Type Air-To-Ground Missile Nationality United States Era Cold War Launch platform Helicopter, UAV Target armored vehicles History Builder Lockheed Martin Date of design   Production period   Service duration   Operators See main text Variants See main text Number built   Specifications Type   Diameter 17. ... A Boeing X-45A UCAV The Unmanned Combat Air Vehicle (UCAV) is the name of a new class of Unmanned Aerial Vehicles (UAVs) that have been designed to carry out air strikes. ...

Design and development considerations

UAV types

UAVs typically fall into one of five categories (although multi-role airframe platforms are becoming more prevalent):

• Target and decoy - providing ground and aerial gunnery a target that simulates an enemy aircraft or missile
• Reconnaissance - providing battlefield intelligence
• Combat - providing attack capability for high-risk missions (see Unmanned Combat Air Vehicle)
• Research and development - used to further develop UAV technologies to be integrated into field deployed UAV aircraft
• Civil and Commercial UAVs - UAVs specifically designed for civil and commercial applications.

A Boeing X-45A UCAV The Unmanned Combat Air Vehicle (UCAV) is the name of a new class of Unmanned Aerial Vehicles (UAVs) that have been designed to carry out air strikes. ...

U.S. UAV tier system

The modern concept of UAVs is to have the various aircraft systems work together in a coordinated effort to support the warfighters on the ground. The integration scheme is described in terms of a "Tier" system, and is used by military planners to designate the various individual aircraft elements in an overall usage plan for integrated operations. The Tiers do not refer to specific models of aircraft, but rather roles for which various models and their manufacturers competed. The U.S. Air Force and the U.S. Marine Corps each have their own tier system, and the two systems are themselves not integrated. Seal of the Air Force. ... United States Marine Corps Emblem The United States Marine Corps (USMC) is the second smallest of the five branches of the United States armed forces, with 170,000 active and 40,000 reserve Marines as of 2002. ...

USAF tier system

• Tier I: Low altitude, long endurance. Role filled by the Gnat 750.^[1]
• Tier II: Medium altitude, long endurance (MALE). Role currently filled by the MQ-1 Predator and MQ-9 Reaper.
• Tier II+: High altitude, long endurance conventional UAV (or HALE UAV). Altitude: 60,000 ot 65,000 feet, less than 300 knots airspeed, 3,000 nautical mile radius, 24 hour time-on-station capability. Complementary to the Tier III- aircraft. Role currently filled by the RQ-4 Global Hawk.
• Tier III-: High altitude, long endurance low-observable UAV. Same parameters as, and complementary to, the Tier II+ aircraft. The RQ-3 Dark Star was originally intended to fulfill this role before it was terminated.^[2][3]

The General Atomics reconnaissance GNAT 750 is a UAV that can fly for 48 hours and reach altitudes of 26,250 feet. ... Predator Unmanned Aerial Vehicle flies on a simulated Navy aerial reconnaissance flight off southern California in December 1995. ... -1... The Northrop Grumman (formerly Ryan Aeronautical) RQ-4 Global Hawk (known as Tier II+ during development) is an unmanned aerial vehicle (UAV) used by the US Air Force as a surveillance aircraft. ... The RQ-3 DarkStar (known as Tier III- during development) unmanned aerial vehicle (UAV) was operated by the US Air Force. ...

USMC tier system

• Tier I: Role currently filled by the Dragon Eye
• Tier II: Role currently filled by the Scan Eagle and, to some extent, the RQ-2 Pioneer
• Tier III: Role currently filled by the Pioneer, although USMC planners do not view this aircraft as meeting future Tier III requirements.^[4][5]

A Dragon Eye UAV The Dragon Eye Unmanned Aerial Vehicle is a 2. ... An RQ-2B on the tarmac Crewmen recover an RQ-2 Pioneer aboard USS Iowa Developed jointly by AAI Corporation and Israel Aircraft Industries, the RQ-2 Pioneer unmanned aerial vehicle (UAV) has served with United States Navy, Marine, and Army units, deploying aboard ship and ashore since 1986. ...

Degree of autonomy

Rear view of a Predator (Reno Air Show)

Some early UAVs are called drones because they are no more sophisticated than a simple radio controlled aircraft being controlled by a human pilot (sometimes called the operator) at all times. More sophisticated versions may have built-in control and/or guidance systems to perform low level human pilot duties such as speed and flight path stabilization, and simple prescripted navigation functions such as waypoint following.

From this perspective, most early UAVs are not autonomous at all. In fact, the field of air vehicle autonomy is a recently emerging field, whose economics is largely driven by the military to develop battle ready technology for the warfighter. Compared to the manufacturing of UAV flight hardware, the market for autonomy technology is fairly immature and undeveloped. Because of this, autonomy has been and may continue to be the bottleneck for future UAV developments, and the overall value and rate of expansion of the future UAV market could be largely driven by advances to be made in the field of autonomy.

Autonomy technology that will become important to future UAV development fall under the following categories:

• Sensor fusion: Combining information from different sensors for use on board the vehicle
• Communications: Handling communication and coordination between multiple agents in the presence of incomplete and imperfect information
• Motion planning (also called Path planning): Determining an optimal path for vehicle to go while meeting certain objectives and constraints, such as obstacles
• Trajectory Generation: Determining an optimal control maneuver to take to follow a given path or to go from one location to another
• Task Allocation and Scheduling: Determining the optimal distribution of tasks amongst a group of agents, with time and equipment constraints
• Cooperative Tactics: Formulating an optimal sequence and spatial distribution of activities between agents in order to maximize chance of success in any given mission scenario

Autonomy is commonly defined as the ability to make decisions without human intervention. To that end, the goal of autonomy is to teach machines to be "smart" and act more like humans. The keen observer may associate this with the development in the field of artificial intelligence made popular in the 1980s and 1990s such as expert systems, neural networks, machine learning, natural language processing, and vision. However, the mode of technological development in the field of autonomy has mostly followed a bottom-up approach, and recent advances have been largely driven by the practitioners in the field of control science, not computer science. Similarly, autonomy has been and probably will continue to be considered an extension of the controls field. In the foreseeable future, however, the two fields will merge to a much greater degree, and practitioners and researchers from both disciplines will work together to spawn rapid technological development in the area. Sensor fusion is an overarching term used to describe the process of collecting, distilling and displaying information from a number of homogeneous or heterogeneous information sources (sensors) to produce an integrated output that is more accurate and complete than that achievable using the same sensors independently of one another. ... This article or section is in need of attention from an expert on the subject. ... // Hondas intelligent humanoid robot AI redirects here. ... The examples and perspective in this article or section may not represent a worldwide view. ... See also 1990s, the band The 1990s decade refers to the years from 1990 to 1999, inclusive, sometimes informally including popular culture from the late 1980s and shortly after the year 2000. ... This article is about an engineering theory called control theory. ...

To some extent, the ultimate goal in the development of autonomy technology is to replace the human pilot. It remains to be seen whether future developments of autonomy technology, the perception of the technology, and most importantly, the political climate surrounding the use of such technology, will limit the development and utility of autonomy for UAV applications.

Under the NATO standardization policy 4586 all NATO UAVs will have to be flown using the Tactical Control System (TCS) a system developed by the software company Raytheon. NATO 2002 Summit in Prague The North Atlantic Treaty Organisation[1] (NATO), also called the North Atlantic Alliance, the Atlantic Alliance or the Western Alliance, is an international organisation for collective security established in 1949, in support of the North Atlantic Treaty signed in Washington, DC, on 4 April 1949. ... The Tactical Control System (TCS) is a group of protocols that govern the command and control system for Unmanned Aerial Vehicles (UAV). ... Raytheon Company (NYSE: RTN) is a major United States military contractor based in Waltham, Massachusetts. ...

UAV endurance

Because UAVs are not burdened with the physiological limitations of human pilots, they can be designed for maximized on-station times. The maximum flight duration of unmanned aerial vehicles varies widely. Internal combustion engine aircraft endurance depends strongly on the percentage of fuel burned as a fraction of total weight (the Breguet endurance equation), and so is largely independent of aircraft size. Solar electric UAVs hold the potential for unlimited flight, a concept championed by the Helios Prototype, which unfortunately was destroyed in a 2003 crash. Louis Charles Breguet (January 2, 1880 - May 4, 1955) was a French airplane designer and builder, one of the early aviation pioneers. ... Helios Prototype UAV in flight Helios Prototype is the name of a solar- and fuel cell system-powered unmanned aerial vehicle that NASA tested. ...

UAV models

UAVs have been developed and deployed by many countries around the world. For a list of models by country, see List of unmanned aerial vehicles. A Boeing 720 being flown under remote control as part of NASAs Controlled Impact Demonstration The following is a list of Unmanned aerial vehicles developed and operated by various countries around the world. ...

Trivia

• UAVs have been used in many episodes of the science fiction television series Stargate SG-1.
• Marilyn Monroe, then named Norma Jeane Baker, was discovered while working in the factory building the first mass-produced UAVs, the OQ-2 Radioplane.

Science fiction is a form of speculative fiction principally dealing with the impact of imagined science and technology, or both, upon society and persons as individuals. ... Stargate SG-1 (often abbreviated as SG-1) is a science fiction television series based upon the 1994 science fiction film Stargate. ... Marilyn Monroe (June 1, 1926 – August 5, 1962) was an iconic American actress, singer and model. ... The OQ-2 Radioplane was the first mass-produced UAV or drone in the United States. ...

References

1. ^ History of Unmanned Aerial Vehicles
2. ^ Comparison of USAF Tier II, II+ and III- systems
3. ^ http://www.edwards.af.mil/articles98/docs_html/splash/may98/cover/Tier.htm USAF Tier system
4. ^ USMC powerpoint presentation of tier system
5. ^ Detailed description of USMC tier system

External links

• Gyrodyne UAV History
• UAV MarketSpace - a comprehensive UAV and UAS Resource Website
• Picture of Swiss UAV in Finnish Army
• "Human Pilots: Who Needs 'Em?" – Wired News, 23 November 2003
• Future Possible Uses and Designs of UAVs from the World Think Tank
• AUVS International Aerial Robotics Competition – Home page by Robert Michelson, AUVS International / Georgia Tech Research Institute
• Defense Update coverage of UAV Mission Systems
• Defense Update reports about UAV employment in Persistent Surveillance
• UAVs at IAI/Malat
• UAVs over Kosovo - did the Earth move? Defense Systems Daily article about NATO UAV operations in Kosovo 1999, includes a list of losses
• UAV operations An Indian Journal of Aerospace Medicine Analysis of Human Factor Issues in UAV accidents
• The UK and US governments are sharing the latest technology for unmanned aerial vehicles (UAV)
• Civilian UAV development
• Autonomy Technologies for Rotorcraft and Fixed Wing Platforms
• TAI's Tiha MALE UAV
• DoD UAS Roadmap 2005-2030
• FAA UAS FAQ
• History of WWI-era UAVs
• White paper detailing development and flight test of experimental tail-sitter UAV
• Raven UAV (tiny drone) launch from building in Najaf, Iraq
• A Fully Autonomous Helicopter Flight Demonstration Video
• Officially confirmed / documented NATO UAV losses in the Balkans

November 23 is the 327th day of the year (328th in leap years) in the Gregorian Calendar, with 38 days remaining. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... The Georgia Tech Research Institute (GTRI) is the nonprofit applied research arm of the Georgia Institute of Technology in Atlanta, Georgia. ... NATO 2002 Summit in Prague The North Atlantic Treaty Organisation[1] (NATO), also called the North Atlantic Alliance, the Atlantic Alliance or the Western Alliance, is an international organisation for collective security established in 1949, in support of the North Atlantic Treaty signed in Washington, DC, on 4 April 1949. ... For other uses of the name Kosovo, see Kosovo (disambiguation). ...

See also

• History of unmanned aerial vehicles
• UCAV
• International Aerial Robotics Competition
• Unmanned Ground Vehicle
• Remotely Operated Vehicle (or ROV)
• Unmanned space mission
• Autonomous Underwater Vehicle
• Controlled Impact Demonstration
• List of missiles by nation
• Unmanned Aircraft System (or UAS)

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