Analysis Of The DARA Robotics Challenge

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The DARPA Robotics Challenge (DRC) is a global competition focused on advancing the field of robotics, in particular with regards to supervisory control, manipulation and mobility. The aim of the challenge is to develop ground robots capable of responding to different natural disaster operations which are too great in scale or too dangerous to the health and safety of the rescue workers. Tasks including handling debris, opening doors, driving utility vehicles and climbing ladders are required of the robots being entered, allowing them to aid or substitute for those workers. The National Aeronautics and Space Administration (NASA) saw a considerable overlap in the technology required for the DRC competition and that required for robotic assistants …show more content…

Valkyrie has 44 degrees of freedom in its joints, with 7 degrees of freedom in each arm, 6 in each hand, 3 in the pelvis and 6 in each leg. For both the competition and in the field during emergency response, the modular system of the robot allows arms to be replaced completely in under fifteen minutes through the removal of one bolt and one connector. Each arm is identical, allowing arms to be interchangeable if required. Integrated actuators and control and electrical systems allow for this modularity. With a rotatable waist and a head that can tilt, this robot makes every effort to be as flexible and capable as humans. Unlike the Atlas robot developed by DARPA, Valkyrie does not require a tether and runs instead on a 2kWh battery stored on the back of the machine, allowing it to be completely self contained. At the moment, the battery pack can only provide power for an …show more content…

The 44 actuated degrees of freedom (DOF) found in the robot allows these tasks to be completed. Three series elastic joints with a common point of intersection for all axes are used in the 3-DOF shoulder joint complex, with a further 1-DOF in each elbow. There are 3-DOF in each wrist, with parallel linear actuators to enable the yaw, pitch and roll of the hand. Each hand contains 15 degrees of freedom(DOF), six of which are actuated, nine are passive. Five flexure actuators are present in the forearm for hand movements, with three 3-DOF fingers and a 4-DOF thumb. To minimize the amount of work and design required for the Valkyrie, joints which performed similarly were reused in different areas on the robot. The wrist implementation is shared with the design for both the ankles and the waist, using similar linear

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