Cam Mechanism Design for a Human Leg Exoskeleton

Abstract:

The purpose of this study is to design and correlate, from theoretical aspects, a mathematical model for virtual prototyping of an actuation system from an exoskeleton human ankle joint. This model is a part of the virtual and experimental prototype from a mechatronic system for locomotion rehabilitation in case of disabled persons. Experimental tests were performed on a group of persons without locomotion deficiencies in order to obtain the pattern curve for cam mechanism design and also to validate the proposed prototype. The obtained database was also used to develop geometrical kinematic synthesis of the exoskeleton actuation mechanisms for other joints such as hip and knee.

• Periodical: Applied Mechanics and Materials (Volume 880)
• Pages: 95-100
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.880.95
• Online since: March 2018
• Authors: Nicolae Dumitru, Cristian Copiluși*, Leonard Marius Ciurezu-Gherghe
• Keywords: Ankle Joint, Cam with Mechanism, Human Locomotion, Leg Exoskeleton

References

[1] K. Amundson, J. Raade, N. Harding, H. Kazerooni, Development of Hybrid Hydraulic Electric Power Units for Field and Service Robots, Adv. Robot., 9 (2006) 1015-1034.

DOI: 10.1163/156855306778394058

[2] A. Chu, H. Kazerooni, A. Zoss, On the Biomimetic Design of the Berkeley Lower Extremity Exoskeleton (BLEEX), Proc. of IEEE International Conference on Robotics and Automation, Barcelona, Spain (2005) 4356-4363.

DOI: 10.1109/robot.2005.1570789

[3] A. Mayr, E. Quirbach, M. Kofler, L. Saltuari, First experience with the Lokomat, gait orthosis in post-acute brain-injured patients [abstract], Eur J Neurol. 9 (2002) 22.

[4] Information on http: /www. eksobionics. com/ekso.

[5] S. I. Dumitrache, N. Dumitru, I. Geonea, Human locomotion system design based on cam mechanism, Proceedings of the World Congress on Engineering, London, UK (2012).

[6] N. Dumitru, C. Copilusi, D. Tarnita, S. Dumitrache, Dynamic analysis of an exoskeleton new ankle joint mechanism, New Trends in Mechanism and Machine Science 24 (2014) 709-717.

DOI: 10.1007/978-3-319-09411-3_75

[7] H. Kazerooni, L. Huang, J. L. Racine, R. Steger, On the Control of Berkeley Lower Extremity Exoskeleton (BLEEX), Proc. of IEEE International Conference on Robotics and Automation, Barcelona, Spain (2005) 4364-4371.

DOI: 10.1109/robot.2005.1570790

[8] Information on http: /rewalk. com.

[9] Information on http: /www. engadget. com/2010/07/15/rex-the-robotic-exoskeleton-aims-to-make-wheelchairs-obsolete.