综合机器人vipjacobian tu berlin oliver brock robotics slides 03技术.pptx

综合机器人vipjacobian tu berlin oliver brock robotics slides 03技术.pptx

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Robotics

VIP:JacobianTUBerlinOliverBrock1TexPointfontsusedinEMF.ReadtheTexPointmanualbeforeyoudeletethisbox.:AAAAAAAAAAAA

2KinematicsForward:Whereistheend-effectorbasedonagivenconfiguration?Inverse:Wheredothejointshavetobetoplacetheend-effector?(Wedidnotcoverthisyet)Now:Howdoesjointmotionandend-effectormotionrelate?before,weconsideredstaticconfigurationswestarttoconsiderlinearandangularvelocities,aswellasstaticforces

3NotationTomakeequationsmorereadablewewilladoptthefollowing:Vector:Matrix:Derivativeofvectorsandmatrices:We’llintroducemoreaswegoalong…

RewritingForwardKinematics4

5InfinitesimalMotion

6PartialDerivativesoffStatic:Motion:

Howdoestheend-effectormove?7

8TheJacobianMatrix

9JacobianandVelocities

10Jacobian:ExampleReminder:

11WhattheJacobiancando…

12JacobianandForceswork=force¢distancevirtualwork:virtualdisplacementswithrealforce(orviceversa)usingmatrixnotationusing

13Reminder:torque/moment

14GravityReloaded:WithJacobianCenterofMassLinearpartofJacobianatCenterofMass1

15GravityExample

16GravityExamplecont.

17WhattheJacobiancando…Myfavoriteformula!

18KinematicSingularitiesThedeterminantdoesnotchangewhenthereferenceframechanges

2DDeterminant19abdca+bc+d

20KinematicSingularitiesIfJlosesrank,asingularityisencounteredThedeterminantforrectangularmatricesisnotdefined(almostnotdefined)IfJisrectangular(morecolumnsthanrows),therobotisredundantwithrespecttothetaskSingularitycanbedetectedbydeterminingthedeterminantoreigenvaluesandeigenvectors

Robotics

FirstStepsinOperationalSpaceControlTUBerlinOliverBrock21TexPointfontsusedinEMF.ReadtheTexPointmanualbeforeyoudeletethisbox.:AAAAAA

OperationalSpaceControl22desdes

23PControlinOperationalSpaceIdea:applyforceproportionaltoerrorpositiongainV(x)x

Resolved-RateMotionControl24The*indicates

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