TUDOR - A multi-link-flexible robot arm catching thrown softballs

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Video in TIB AV-Portal: TUDOR - A multi-link-flexible robot arm catching thrown softballs

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Title
TUDOR - A multi-link-flexible robot arm catching thrown softballs
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CC Attribution 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Release Date
2011
Language
Silent film
Production Year
2011
Production Place
Dortmund

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Subject Area
Abstract
The video shows the three degree of freedom multi-flexible link robot arm TUDOR (Technische Universität Dortmund omnielastic robot) catch balls thrown by a human. The intrinsic compliance of flexible link robots offers novel opportunities for safe human robot interaction as well as force control. Nevertheless the fast joint motions induce significant structural vibrations and the kinematic chain shows load and configuration dependent static deflections. These properties aggravate the precise positioning of flexible link robots. In the video a stabilizing decentralized strain feedback controller rapidly damps the structural vibrations while an artificial neural network has been trained to solve the inverse kinematics problem for varying configurations and payload. The trajectory of the segmented ball is estimated from measurements obtained via a Microsoft Kinect RGB-D-sensor. The measurements are fused with a motion model including Newton friction via an extended Kalman filter. The camera is mounted next to the laboratory entrance. The demonstrator has a success rate of more than 66%, provided that the ball trajectory intersects the planar subspace of the robot workspace, in which the ball can be caught. Timeline: 00:08 Ball catching without vibration control 00:32 Ball catching with decentralized vibration damping control 01:00 Ball tracking and catch location prediction with the Kinect References: Malzahn, J., A. S. Phung und T. Bertram: A Multi-Link-Flexible Robot Arm Catching Thrown Balls. 7th German Conference on Robotics, 21./22.05.2012 ,pp. 411-416 Mai 2012 For more information on the project please visit: http://www.rst.e-technik.tu-dortmund....
Keywords oscillation damping collision detection flexible robot elastic link flexible link compliance force control robotics robotic catching kinect computer vision visual tracking
Computer animation Chain
Computer animation Chain
Computer animation
Computer animation
Computer animation Finger protocol Continuous track Plane (tool)
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