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BigDog is a dynamically stable quadruped robot created in 2005 by Boston Dynamics with Foster-Miller, the NASA Jet Propulsion Laboratory, and the Harvard University Concord Field Station.〔(【引用サイトリンク】title=BigDog - The Most Advanced Rough-Terrain Robot on Earth )〕 BigDog is long, stands tall, and weighs , about the size of a small mule. It is capable of traversing difficult terrain, running at , carrying , and climbing a 35 degree incline.〔 Locomotion is controlled by an onboard computer that receives input from the robot's various sensors. Navigation and balance are also managed by the control system. == History == BigDog is funded by the Defense Advanced Research Projects Agency (DARPA) in the hopes that it will be able to serve as a robotic pack mule to accompany soldiers in terrain too rough for conventional vehicles. Instead of wheels or treads, BigDog uses four legs for movement, allowing it to move across surfaces that would defeat wheels. The legs contain a variety of sensors, including joint position and ground contact. BigDog also features a laser gyroscope and a stereo vision system. BigDog's walking pattern is controlled through four legs, each equipped with four low-friction hydraulic cylinder actuators that power the joints. "The BigDog robot, labelled as a military robot mule, has subsequently proven its potential worth in its ability to reduce load and remove that burden from a soldier's back." The BigDog project was headed by Dr. Martin Buehler, who, in 2012, received the Joseph F. Engelberger Award from the Robotics Industries Association for the work. Dr. Buehler, while previously a professor at McGill University, headed the robotics lab there, developing four-legged walking and running robots. Built onto the actuators are sensors for joint position and force, and movement is ultimately controlled through an onboard computer which manages the sensors. Approximately 50 sensors are located on BigDog. These measure the attitude and acceleration of the body, motion and force of joint actuators as well as engine speed, temperature and hydraulic pressure inside the robot's internal engine. Low-level control, such as position and force of the joints, and high-level control such as velocity and altitude during locomotion, are both controlled through the onboard computer. BigDog was featured in episodes of ''Web Junk 20'' and ''Hungry Beast'', and in articles in ''New Scientist'', ''Popular Science'', ''Popular Mechanics'', and ''The Wall Street Journal''. On March 18, 2008, Boston Dynamics released video footage of a new generation of BigDog known as AlphaDog.〔(DARPA’S LS3 AlphaDog begins outdoor testing )〕 The footage shows BigDog's ability to walk on icy terrain and recover its balance when kicked from the side.〔(Video of BigDog in action ) from Boston Dynamics〕 The refined equivalent has been designed by Boston Dynamics to exceed the BigDog in terms of capabilities and use to dismounted soldiers. In February 2012, with further DARPA support, the militarized Legged Squad Support System (LS3) variant of BigDog demonstrated its capabilities during a hike over tough terrain. Starting in the summer of 2012, DARPA planned to complete the overall development of the system and refine its key capabilities in 18 months, ensuring its worth to dismounted warfighters before it is rolled out to squads operating in theatre. BigDog must be able to demonstrate its ability to complete a trek within 24 hours without refuelling while carrying a load of , whereas a refinement of its vision sensors will also be conducted. At the end of February 2013, Boston Dynamics released video footage of a modified BigDog with an arm. The arm can pick up objects and throw them. The robot is relying on its legs and torso to help power the motions of the arm. The news writer supposed it can lift weights around .〔("BigDog Throws Cinder Blocks with Huge Robotic Face-Arm" ) ''IEEE Spectrum'', 28 February 2013.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BigDog」の詳細全文を読む スポンサード リンク
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