In practical usage, a robot is a mechanical device which performs automated tasks, either according to directhuman supervision, a pre-defined program or, a set of general guidelines, using artificial intelligence techniques. These tasks either replace or enhance human work, such as inmanufacturing, construction or manipulation of heavy or hazardous materials.
A robot may include a feedback-driven connection between sense and action, not under direct human control.The action may take the form of electro-magnetic motors or actuators that move anarm, open and close grips, or propel the robot. The step by step control and feedback is provided by a computer program run on either an external or embedded computer or a microcontroller . By this definition, a robot may includenearly all automated devices.
Alternately, robot has been used as the general term for a mechanical man, or an automaton resembling an animal, either real or imagined. It has come to be applied to many machines whichdirectly replace a human or animal in work or play. In this way, a robot can be seen as a form of biomimicry . Anthropomorphism is perhaps whatmakes us reluctant to refer to the highly complex modern washer-dryer as a robot. However, in modern understanding, the termimplies a degree of autonomy that would exclude many automatic machine tools from being called robots. It is the search for evermore highly autonomous robots which is the major focus of robotics research and which drives much work in artificial intelligence .
Though we tend to think of robots as tremendously sophisticated, thanks typically to their anthropomorphic physical design andour excess of indoctrination to the "Danger, Will Robinson!" robots of 1960s television, the fundamental elements are verysimple. Motion is achieved by motors controlled by digital circuits that incorporate a key power semiconductor switching elementcalled a thyristor or silicon-controlled rectifier (SCR). The robot turns when only one of two parallel motors isactuated: for example, stopping the left motor while running the right motor causes the dummy to turn left. Digital signals fedto the motor control circuitry determine which motors move at which times. The problem can range from very simple (e.g., turningleft or right) to very complex (e.g., controlling an elbow and wrist to move an item from a conveyor belt to a shelf). Thesignals can be sent by an outside element (e.g., a human operator) or by internal circuitry that makes "decisions" based uponobservations of the robot's environment and may alter these decisions based upon whether the motion is proceeding satisfactorily(see feedback ).
Underlying simplicities notwithstanding, combinations of various computer systems and electromechanical subsystems can producethe appearance of profound sophistication, e.g., a "chess-playing robot" that really should be viewed as two discrete systems:(1) chess-playing software that has nothing to do with robotics; and (2) a robot that interacts with the game board. The latterrequires the abilities to [a] locate a chessman on the board based upon its expected coordinates, [b] lift the man, [c] removeany captured man from the board, and [d] reposition the first man--all without breaking or knocking down chess pieces orcommitting other environmental faux pas.
The idea of artificial people dates at least as far back as the ancient legend of Cadmus , who sowed dragon teeth that turned into soldiers; and the myth of Pygmalion , whose statue of Galatea came to life. In classicalmythology, the deformed god of metalwork ( Vulcan or Hephaestus ) created mechanical servants, ranging from intelligent, golden handmaidensto more utilitarian three-legged tables that could move about under their own power. Jewish legend tells of the Golem , an clay statue animated by Kabbalistic magic.
The first recorded design of a humanoid robot was made by Leonardoda Vinci around the 1495 . Da Vinci's notebooks, rediscovered in the 1950s , contained detailed drawings for a mechanical knight that was apparently able to sit up, wave its arms, and move its head and jaw. The design was likely based onhis anatomical research recorded in the Vitruvian Man . It is notknown whether or not he attempted to build the robot (see: Leonardo'srobot ).
The first known functioning robot was created in the 1738 by Jacques de Vaucanson , who made an android that played the flute, aswell as a mechanical duck that reportedly ate and defecated. E.T.A. Hoffmann's 1817 shortstory "The Sandman" features a doll-like mechanical woman, and Edward S. Ellis' 1865 "SteamMan of the Prairies" expresses the American fascination with industrialization. A wave of stories about humanoid automatonsculminated with the "Electric Man" by Luis Senarens in 1885 .
Once technology advanced to the point where people foresaw mechanical creatures as more than toys, literary responses to theconcept of robots reflected fears that humans would be replaced by their own creations. Frankenstein ( 1818 ), sometimes called the first science fictionnovel, has become synonymous with this theme. When Capek's play RUR introduced the concept of an assembly line run byrobots who try to build still more robots, the theme took on economic and philosophical overtones, further disseminated by theclassic movie Metropolis ( 1927 ), and the popular Blade Runner ( 1982 ) and TheTerminator ( 1984 ). With robots a reality and intelligent robots a likely prospect,a better understanding of interactions between robots and human is embodied in such modern films as Spielberg 's A.I.(movie) (2001) and Proyas' I, Robot (2004).
Many consider the first robot in the modern sense to be a teleoperated boat, similar to a modern ROV , devised by Nikola Tesla and demonstrated at an 1898exhibition in Madison Square Garden. Based on his patent 613,809 for "teleautomation", Tesla hoped to develop the "wirelesstorpedo" into an automated weapon system for the US Navy.
The word robot comes from the Czech robota meaning"forced labor." The word was first used in Karel Capek 's play R.U.R. (Rossum's UniversalRobots) (written in 1920 ; first performed 1921 ; performed in New York 1922 ; English edition published 1923 ).  . While Karel is frequently acknowledged as the originatorof the word, he wrote a short letter in reference to the Oxford English Dictionary etymology in which he named his brother, painter and writer Josef Capek as its true inventor.  .
Some claim that the word "robot" was first used in Josef Capek's short story Opilec (the Drunkard) published in the collectionLelio in 1917. According to the Capek brother's Society in Prague, this is not correct. The word used in Opilec is "automat.""Robot" appeared in RUR for the first time.
Although Capek's robots were organic artificial humans, the word robot has cometo refer to mechanical humans. The term android can mean either one of these, while a cyborg ("cyberneticorganism" or " bionic man") would be acreature that is a combination of organic and mechanical parts.
Contemporary uses of robots
Robots are being used today to do the tasks that are either too dirty, dangerous, difficult, repetitive or dull for humans.This usually takes the form of industrial robots used inmanufacturing lines. Other applications include toxic waste cleanup, space exploration , mining ,search and rescue, and mine finding. Manufacturing remains the primary market where robots are utilized. In particular,articulated robots, similar in motion capability to the human arm, are the most widely used. Applications include welding,painting and machine loading. The automotive industry hastaken full advantage of this new technology where robots have been programmed to replace human labor in many simple repetitivetasks. The wide adoption of such technologies, however, was delayed by the availability of cheap labour and high capitalrequirements of robotics.
While robotic technology has achieved a certain amount of maturity, the social impact of these robots is largely unknown. Thefield of social robots is now emerging and investigates the relationshipbetween robots and humans. A ludobot is an instance of a social robot dedicated to entertainment and companionship.
In early 2000s domestic robots have entered the mainstream culture, with the success of Sony's Aibo and several manufacturers releasing robotic vacuumcleaners . Japanese corporations are notorious for their successes in developing humanoid robots and their plans to use thetechnology not only in their manufacturing plants, but also in Japanese homes. There is much hope in Japan , that home care for an aging (and long-lived) population can bebetter achieved through robotics.
Robots have also been explored as a form of High-tech Art . The Austin Robot group and others have produced many interesting pieces such as Sparky  .
When roboticists first attempted to mimic human and animal gaits , they discovered thatit was incredibly difficult; requiring more computational power than what was available at the time. So, emphasis was shifted toother areas of research. Simple wheeled robots were used to conduct experiments in behavior , navigation , and path planning . When engineers wereready to attempt walking robots again, they started small with hexapods and othermulti-legged platforms. These robots mimicked insects and arthropods in both form and function. The trend towards these bodytypes offer immense flexibility and proven adaptability to any environment. With more than four legs, these robots are statically stable which makesthem easier to work with. Even though significant progress towards bipedal locomotion in robots has been made only recently, in just 4 years after the introduction of Asimo bipedal robots such as KHR-1 that cost only1300$ became available.
Another technical problem preventing wider adoption of robots is the complexity of handling physical objects in the inherentlychaotic natural environment. Tactile sensors and better vision algorithms may solve this problem. Librarian robot from University Jaume I in Spain is a good example of currentprogress in this field.
Recently, tremendous progress has been made in medical robotics, with two companies in particular, Computer Motion andIntuitive Surgical, receiving regulatory approval in North America, Europe and Asia for their robots to be used in minimalinvasive surgical procedures. Laboratory automation is also a growing area. Here, benchtop robots are used to transportbiological or chemical samples between instruments such as incubators, liquid handlers and readers. Other places where robots arelikely to replace human labour are in deep-sea exploration and space exploration. For these tasks, arthropod body types are generally preferred. Mark W. Tilden formerly of Los Alamos NationalLaboratories specializes in cheap robots with bent but unjointed legs, while others seek to replicate the full jointed motionof crabs' legs.
Experimental winged robots and other examples exploiting biomimicry are alsoin early development. So-called " nanomotors " and " smart wires " are expected to drasticallysimplify motive power, while in-flight stabilization seems likely to be improved by extremely small gyroscopes. A significantdriver of this work is military research into spy technologies.
Many scientists are confident that robots with human-level intelligence willbe developed in the first half of the 21st century. Even before that the robots may become sufficiently useful to replacehumans in many (if not most) jobs. While initially this can lead to growing unemployment and social turmoil, in the medium-termit's likely to bring increased material wealth to people in most nations. The cybernetics pioneer Norbert Wiener discussed some ofthese issues in his book The human use of human beings (1950).
Simultaneously, robotics will probably continue its spread in offices and homes, replacing "dumb" appliances with smartrobotic equivalents. Domestic robots capable of performing most household tasks, described in many sci-fi stories and coveted bythe public in the 1960s, are likely to be eventually perfected.
There is likely to be some degree of convergence between humans and robots. Many humans are already cyborgs with some body parts and even parts of the nervous system replaced by artificial analogues. In manycases the same technology might be used both in robotics and in medicine.
Dean Kamen , Founder of FIRST , andthe American Society ofMechanical Engineers (ASME) created a competitive forum that inspires in young people, their schools and communities anappreciation of science and technology.
Their RoboticsCompetition is a multinational competition that teams professionals and young people to solve an engineering design problemin an intense and competitive way. In 2003 the competition will reach more than 20,000 students on over 800 teams in 24competitions. Teams come from Canada, Brazil, the U.K., and almost every U.S. state. Unlike the Robot sumo wrestling competitionsthat take place regularly in some venues, or the Battlebots competitions on TV, these competitions include the creationof the robot.
RoboCup is a competitive organization dedicated to developing a team of fullyautonomous humanoid robots that can win against the human world soccer champion team by the year 2050. There are many differentleagues from simulation, to full-size humanoid.
The DARPA Grand Challenge was a competition forrobotic vehicles to complete an under-300 mile, off-road course in the Mojave Desert.
The two AAAI Grand Challenges focus on Human RobotInteraction , with one being a robot attending and delivering a conference talk, the other being operator-interactionchallenges in rescue robotics.
The popularity of the TV shows Robot Wars and Battlebots , of college level robot-sumo wrestling competitions, the success of " smartbombs " and UCAVs in armed conflicts, grass-eating " gastrobots " in Florida, and the creation of a slug -eating robot in England,suggest that the fear of an artificial life form doing harm, or competing with natural wild life, is not an illusion. The worldwide Green Parties in 2002 were asking for public input on extending their existing policies against such competition, as part of moregeneral biosafety and biosecurity concerns. It appears that, like AldousHuxley 's concerns about human cloning , questions Karel Capek raisedeighty years earlier in science fiction have become real debates.
The concern that robots might displace or compete with humans is common. In his I, Robot series, Isaac Asimov created the Three Laws of Robotics in a literary attempt to control thecompetition of robots with humans:
Unfortunately the issue may be not so simple to resolve. Asimov himself based the plots of quite a few robots novels onprobing into the applicability and sufficiency of the Three Laws. The laws or rules that could or must apply to robots or other"autonomous capital" in cooperation or competition with humans have spurred investigation of macro-economics of this competition, notably by Alessandro Acquisti building on much older work by John von Neumann .
Even without overt malicious programming, robots and humans simply do not have the same body tolerances or awarenesses,leading to accidents: In Jackson, Michigan on July 21 , 1984 , a factory robot crushed a worker againsta safety bar in apparently the first robot-related death in the UnitedStates .
Additional robot topics
Other usages of Robot
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