JRM Vol.22 No.2 pp. 239-247
doi: 10.20965/jrm.2010.p0239


Trajectory Generation of CPM Device for Upper Limbs Considering Constraint Caused by Joint Disorder

Shota Miyaguchi*, Nobutomo Matsunaga**, and Shigeyasu Kawaji**

*Omron Corporation, 9-1 Kizugawadai, Kizugawa-City, Kyoto 619-0283, Japan

**Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto-shi, Kumamoto 860-8555, Japan

September 17, 2009
December 19, 2009
April 20, 2010
continuous passive motion, CPM device, upper limbs, elbow joint disorder, impedance control

Continuous Passive Motion (CPM) is a postoperative orthopedic treatment or physiotherapy. After surgery in Ulna Collateral Ligament (UCL) injury to the elbow, excessive UCL extension aggravates the injury. Postoperative large stiffness increases reaction force at hand of patient excessively near the end of the range of motion. Controlling pro/supination effectively suppresses the reaction force, but the UCL may be extended excessively by the pro/supination. In this paper, focusing on postoperative UCL treatment, we propose the trajectory generation method for controlling the pro/supination to suppress both the reaction force and the UCL extension based on a skeleton model. Finally, experimental results with simulated patient show the effectiveness of our proposal.1

Cite this article as:
Shota Miyaguchi, Nobutomo Matsunaga, and Shigeyasu Kawaji, “Trajectory Generation of CPM Device for Upper Limbs Considering Constraint Caused by Joint Disorder,” J. Robot. Mechatron., Vol.22, No.2, pp. 239-247, 2010.
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Last updated on Mar. 05, 2021