Siddhartha Srinivasa - Computer Science at RPItrink/RSS-2011/Presentations/sidd.pdf · •...
Transcript of Siddhartha Srinivasa - Computer Science at RPItrink/RSS-2011/Presentations/sidd.pdf · •...
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Reconciling Geometric Planners with
Physical Manipulation
Siddhartha SrinivasaAssociate Professor
The Robotics Institute, CMUwww.cs.cmu.edu/~siddh
DirectorThe Personal Robotics Lab
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PhysicalManipulation
GeometricSearch
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PhysicalManipulation
GeometricSearch
ManipulationPerception Systems
Navigation LearningParallelism Control
3D ModelingHRI
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Manipulation Planning
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Constraints
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Constraints
Pose
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Constraints
Torque
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Constraints
Balance
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Constraints
Closed Chains
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Constraints
Underactuation
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Affordances
Goal Sets
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Affordances
Goal Sets
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Why is this hard?
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3DOF Planar Manipulator
Heavy Object(Torque Constraint)
Sliding Surfaces(Pose Constraint)
Representation
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a:
e:
ae
Representation
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a:
e:
ae
Search
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c
e
b
a
d
a
b
c
d
e
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Task Space Regions
cBiRRT
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Start
Goal
obstacle
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qnear
qrand
Start
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qnear
qrand
Start
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Will this work?• Properties of P
• Implementing P
• Manifold Coverage
• Exploration
• Probabilistic Completeness
• How does it work on a real robot?
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Yes [IJRR’11]• Properties of P [ICRA’10]
• Implementing P [ICRA’09a,b]
• Manifold Coverage [ICRA’10]
• Exploration [ICRA’10]
• Probabilistic Completeness [ICRA’10]
• How does it work on a real robot?[ICRA’09a,b IROS’09 Humanoids’09]
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PhysicalManipulation
GeometricSearch
ManipulationPerception Systems
Navigation LearningParallelism Control
3D ModelingHRI
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Failure : Uncertainty
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Failure : Uncertainty
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?
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Departing Kinematics
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Exploit the Mechanics of Manipulationto Funnel Uncertainty [Mason’81, Burridge et al.’99]
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Why not just open the hand wide and sweep?
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Clutter
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?
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The Details of Push-Grasping
Mechanics• What are the consequences of a push?• How much does the robot need to know?
Method• How do we address uncertainty?• How do we plan in clutter?
Validation• Is our model of mechanics realistic?• Does push-grasping work on a real robot?
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Quasi-Static Pushing
How much should the robot know?• Object mass? No.
• Object-surface friction? No.
• Object pressure distribution? Pick conservatively.
• Finger-object friction? Pick conservatively.
The Voting Theorem[Mason’81]
The Limit Surface[Goyal et al.’91, Howe and Cutkosky’96]
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The Push-Grasp
• Hand pose: ph=(x,y,q)
• Aperture: a
• Pushing direction: v
• Pushing distance: d
Push-Grasp: G(ph,a,d)
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The Capture Region
• Capture Region: C(G,O)– Set of all poses of object O that results in a successful
push-grasp for G
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Example Capture Regions
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Understanding Capture Regions
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Understanding Capture Regions
IV, VI: Object contour
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Understanding Capture Regions
IV, VI: Object contours
II, V: Caging regions
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Understanding Capture Regions
IV, VI: Object contours
II, V: Caging regions
I, III: Pushing regions
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Understanding Capture Regions
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Addressing Object Pose Uncertainty
Vision
Reportedpose
UncertaintyRegion
Is included in capture region of a G?
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The Details of Push-GraspingBest Paper Award Finalist IROS 2010
Mechanics• What are the consequences of a push?• How much should the robot know?
Method• How do we address uncertainty?• How do we plan in clutter?
Validation• Is our model of mechanics realistic?• Does push-grasping work on a real robot?
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A Framework for Push-grasping in Clutter[RSS 2011 oral]
Slide-away
Sweep
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61
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PhysicalManipulation
GeometricSearch
ManipulationPerception Systems
Navigation LearningParallelism Control
3D ModelingHRI
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SensorDesign
ArmControl
TrajectoryOptimization
BehaviorEngine
HierarchicalPlanning
PeopleDetection
StructureDiscovery
CollaborativeManipulation
SkillLearning
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• BusinessWeekWorld's most advanced robots
• CBSRobots Soon To Become Part Of Home, Work Life
• Popular ScienceRise of the Helpful Machines: Meet 10 of the most advanced human-assist 'bots from around the world
• Fast CompanyIntel's Robot Butler Serves, Clears, and Does Dishes
• Wired MagazineButler Robot Can Fetch Drinks, Snacks
• NBC Bay AreaRobot Steals the Show at Intel Show-Off Day
• ABC San FranciscoIntel shows off new innovations on Research
• NSF Science NationHERB, the Robot Butler
• CMU Link MagazineRobots for Life
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CollaboratorsPeter Kaiser
Tim Niemueller
Peter Allen
Chris Atkeson
Drew Bagnell
Jodi Forlizzi
Martial Hebert
Takeo Kanade
Charlie Kemp
Sara Kiesler
Ross Knepper
James Kuffner
Min Kyung Lee
Matt Mason
Nancy Pollard
Ali Rahimi
Jim Rehg
Thierry Simeon
Joshua Smith
Rosen Diankov
Dave Ferguson
Garratt Gallagher
Casey Helfrich
Bart Nabbe
Nico Blodow
Maya Cakmak
Lillian Chang
Martin Herrmann
Geoff Hollinger
Laura Lindzey
Manuel Martinez
Alberto Rodriguez
Martin Rufli
Adam Rule
Alexander Sorokin
Andrew Yeager
Andres Vazquez
Julius Ziegler
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Reconciling Geometric Planners with
Physical Manipulation
Siddhartha SrinivasaAssociate Professor
The Robotics Institute, CMUwww.cs.cmu.edu/~siddh
DirectorThe Personal Robotics Lab