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Haptic
Feedback of Manipulator Kinematic Conditioning for Teleoperation
Abstract
In
teleoperation, problems can occur when a slave manipulator loses
the ability to move or exert force in some directions/orientations
due to its configuration. The configuration near and at a manipulator
s kinematic singularity can cause failure in the control algorithm
and may result in the loss of kinesthetic correspondence between
the operator and the slave manipulator. Haptic interface is
bi-directional and yields small response time. Therefore the
manipulator kinematic conditioning information can be presented
to the operator more effectively using haptic feedback than
the conventional visual feedback during real-time teleoperation.
Singularity force feedback (SFF) is proposed to be an interactive
solution to the singularity problem. SFF exists only in the
neighborhood of singularity. SFF is created to reduce the command
velocity in the critical direction and to guide the command
motion to the feasible direction near a singularity. A procedural
scheme for assigning the appropriate value of the parameters
in SFF calculation is established. The proposed SFF model is
analyzed in term of stability, passivity and error convergence.
Teleoperation experiment is performed to validate the concept
of SFF. The results from the experiment demonstrate that haptic
feedback can effectively convey information about kinematic
conditioning of a slave manipulator to the operator in real-time
teleoperation. The proposed SFF method can improve the kinematic
performance of teleoperation near singularity.
Research
Projects
Linear
Haptic Display (LHD)
High
Bandwidth Force Display (HBFD)
Publications
(*) (*)
Note: Most of the BRL
publications are available on-line in a PDF format.
You may used the publication's reference number as a link to the
individual manuscript.
[130]
T. Maneewarn, B. Hannaford, 'Augmented
Haptics of Manipulator Kinematic Condition,' Proc. SPIE Telemanipulator
Workshop, Boston, MA, October, 1999.
[125]
T. Maneewarn, B. Hannaford, D. Storti, M. Ganter, 'Haptic
Rendering For Internal Content Of An Implicit Object,' ASME
Winter Annual Meeting Haptics Symposium, Nashville, TN, Nov. 1999.
[114]
T. Maneewarn, B. Hannaford, 'Haptic
Feedback of Kinematic Conditioning for Telerobotic Applications,'
Proceedings of IROS 98, pp. 1260-65, Victoria, B.C., Canada, Nov.
1998.
[Th023]
T. Maneewarn, 'Haptic
Feedback of Manipulator Kinematic Conditioning for Teleoperation,'
Ph.D. Thesis, University of Washington, Department of Electrical
Engineering, September, 1999. |
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