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BigDog has an on-board computer that controls locomotion, servos the legs and handles a wide variety of sensors. BigDog’s control system manages the dynamics of its behavior to keep it balanced, steer, navigate, and regulate energetics as conditions vary. Sensors for locomotion include joint position, joint force, ground contact, ground load, a laser gyroscope, and a stereo vision system. Other sensors focus on the internal state of BigDog, monitoring the hydraulic pressure, oil temperature, engine temperature, rpm, battery charge and others.
So far, BigDog has trotted at 3.3 mph, climbed a 35 degree slope and carried a 120 lb load.
BigDog is being developed by Boston Dynamics with help from Foster Miller, the Jet Propulsion Laboratory, and the Harvard University Concord Field Station. Development is funded by the DARPA Defense Sciences Office.
Video is fairly old .. I'd say 3 years or so .... as for the tech info
IIRC main power of the device is the petrol engine
But there still working on it **broken link removed**Boston Dynamics is an engineering company that specializes in robotics and human simulation. Our customers have applications that range from military robotics to simulation-based training to physics-based virtual prototyping.