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RoboTalk: a general robot control framework Can we access R2D2 & C3PO with the same control commands? Allen Yang Yang University of Illinois at Urbana-Champaign H. Gonzales-Banos, V. Ng-Thow-Hing, J. E. Davis Honda Research Institute, Mountain View, CA
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2 Copyright Lucasfilm Ltd. Motivation Mobile Robot with Pan-Tilt Camera Honda Asimo Humanoid Robot
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3 Why do we need a motion specification? Difficulties for researchers in robotics: Industrial copyright Programs are not re-usable in different robot families, even different versions of same robot families Have to choose OS based on the drivers provided Not easy to share a robot remotely with other collaborators in different locations Motion Commands Windows?Linux?Mac OS? Embedded OS?
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4 Project goals Whatever: (cross-model) Provide a network-enabled interface for Asimo which is independent of the controller libraries Access to other robots & simulators: Pioneer, Puma Whoever: (cross-platform) User interface must be cross-platform: support Unix, Linux, Mac OS X and Windows. Wherever: (cross-network) Good quality of service across the Internet.
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5 Demo Videos
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6 Contributions A robot specification standard One command interface Four command modes between client and server: Direct Delay Playback Broadcast Easy-to-change robot driver implementation on the server-end
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7 Previous Work Player [R. Gerkey and A. Howard, 2003] Open Architecture Humanoid Robotics Platform (HRP) [F. Kanehiro, et al., 2004] Open Pino Project [ F. Yamasaki, et al., 2000] OROCOS [http://www.orocos.org/] Dedicated systems ARIA [robots.activmedia.com/ARIA/] Robonaut [H. Aldridge, et al., 2000] Athena [J. Biesiadecki, et al., 2001]
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8 Why not others? Do not support humanoid robots Hard to change driver implementation Do not have network quality support Do not have protection mechanism for exotic robots
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9 System Architecture System Overview Client/Server Structure Four Communication Modes
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10 Architecture - Specification Standard Configuration Spec Command Spec Communication Spec Abstraction
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11 Architecture - System Overview Client/Server... Client Server Asimo Library Pioneer Library Simulator Configuration Spec Command Spec Communication Spec
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12 Architecture - Robotalk Server Server Daemon Robot Daemon Read and Write TCP/IP sockets Issue Robot Driver Calls CClientConnection Provide: Buffering, Scheduling, Panic, etc. Class Interface... CRobotDriver
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13 Architecture - CClientConnection CClientConnection Command Queue Return Queue Playback Queue Read Write Input commands Feedback Priority Queues Server Daemon Robot Daemon
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14 Architecture - CClient Read Daemon Return cache CClient Class Class Interface Commands to the server. (Blocking/Nonblocking) Feedback (Nonblocking) Broadcast cache Function calls
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15 Architecture - Communication Modes Direct mode: blocking & instantaneous, for debug purposes Delay mode: nonblocking, instantaneous or delay Playback mode: nonblocking, adaptive caching based on channel quality Broadcast mode: periodic query feedback
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16 Direct Mode ClientServer Sync system clock Clock Command Cache Robot Daemon Client Function call Cache Return Cache return
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17 Delay Mode ClientServer Sync system clock Robot Daemon Client Cache Function call return Delay Command Cache Clock + Return Cache error signal
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18 Playback Mode Client Cache Function call return Return Cache error signal Clock Playback Cache Command Cache Delay Robot Daemon ClientServer Length of the sequence
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19 Broadcast Mode Client Cache Broadcast call return Command Cache Robot Daemon Return Cache data Delay
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20 Conclusions Motivations System Structure Four Network Command Modes Future Extensions Exclusive control Data channels Controlling multiple humanoid robots Virtual humanoid robots
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21 Virtual Humanoid Server Pioneer Library Camera Library Puma Library Site A Site B Virtual Humanoid
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22 Thank you! Allen Yang: yangyang@uiuc.eduyangyang@uiuc.edu Hector Gonzales-Banos: hhg@honda-ri.comhhg@honda-ri.com Victor Ng-Thow-Hing: vng@honda-ri.com All videos available online: perception.csl.uiuc.edu/RoboTalk/
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