Students create bipedal, soccer-playing robot

Friday, 09 November, 2007

Engineering students from the Robotics & Mechanisms Laboratory (RoMeLa) at Virginia Tech have developed a bipedal humanoid robot using the National Instruments LabVIEW graphical system design platform.

The Dynamic Anthropomorphic Robot with Intelligence (DARwIn) was originally developed to study human locomotion for the research and development of prosthetic limbs.

The robot achieves full range of motion and accurately imitates human movement so effectively that it was modified to play soccer for entry into RoboCup, an international robotic soccer competition created to promote research in robotics, artificial intelligence and related fields. As a result, it has been accepted as the first-ever US entry into RoboCup in the humanoid division.

“Our students used LabVIEW to design an expandable software platform as well as serve as DARwIn’s brain, giving it the ability to perform high-level tasks, including playing soccer,” said Dr Dennis Hong, director of RoMeLa.

“Development time was also reduced by simulating how DARwIn would behave when performing certain tasks and being able to quickly design, prototype and deploy simulated code to an embedded target.”

RoMeLa, which uses multiple robotic platforms, required a system that could be easily configured for different hardware set-ups. Students were able to create an expandable computer architecture using the LabVIEW Real-Time Module to accommodate a range of sensors including those incorporated in IEEE 1394 cameras, RS-485 communication devices and multiple wireless networks.

LabVIEW controls the robot’s motion over RS-485 and can read joint positions on the same serial network from the servo motors’ built-in potentiometers. While the robot is walking or moving, a rate gyro with acceleration and orientation information communicates with LabVIEW over an RS-232 serial connection so that the program modifies the walking gait to effectively balance the robot in real time.

The graphical system design approach is popular in robotics design because it gives users the ability to design, prototype and deploy embedded systems using graphical programming with programmable hardware.

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