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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hyunchul Kim Miller, L.M. Byl, N. Abrams, G. Rosen, J. |
| Copyright Year | 1964 |
| Abstract | The human arm has 7 degrees of freedom (DOF) while only 6 DOF are required to position the wrist and orient the palm. Thus, the inverse kinematics of an human arm has a nonunique solution. Resolving this redundancy becomes critical as the human interacts with a wearable robot and the inverse kinematics solution of these two coupled systems must be identical to guarantee an seamless integration. The redundancy of the arm can be formulated by defining the swivel angle, the rotation angle of the plane defined by the upper and lower arm around a virtual axis that connects the shoulder and wrist joints. Analyzing reaching tasks recorded with a motion capture system indicates that the swivel angle is selected such that when the elbow joint is flexed, the palm points to the head. Based on these experimental results, a new criterion is formed to resolve the human arm redundancy. This criterion was implemented into the control algorithm of an upper limb 7-DOF wearable robot. Experimental results indicate that by using the proposed redundancy resolution criterion, the error between the predicted and the actual swivel angle adopted by the motor control system is less then 5°. |
| Sponsorship | IEEE Engineering in Medicine and Biology Society |
| Page Count | 10 |
| File Size | 1499054 |
| Starting Page | 1770 |
| Ending Page | 1779 |
| File Format | |
| ISSN | 00189294 |
| Volume Number | 59 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Joints Humans Wrist Redundancy Elbow Kinematics Ellipsoids swivel angle Exoskeleton inverse kinematic redundancy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biomedical Engineering |
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