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ACE-Ankle: A Novel Sensorized RCM (Remote-Center-of-Motion) Ankle Mechanism for Military Purpose Exoskeleton

Published online by Cambridge University Press:  17 June 2019

Man Bok Hong Open the ORCID record for Man Bok Hong [Opens in a new window] ,
Gwang Tae Kim Open the ORCID record for Gwang Tae Kim [Opens in a new window]  and
Yeo Hun Yoon Open the ORCID record for Yeo Hun Yoon [Opens in a new window]
Man Bok Hong*
Affiliation:
Ground Technology Research Institute, Agency for Defense Development, Daejeon, Korea. E-mails: [email protected], [email protected]
Gwang Tae Kim
Affiliation:
Ground Technology Research Institute, Agency for Defense Development, Daejeon, Korea. E-mails: [email protected], [email protected]
Yeo Hun Yoon
Affiliation:
Ground Technology Research Institute, Agency for Defense Development, Daejeon, Korea. E-mails: [email protected], [email protected]
*
*Corresponding author. E-mail: [email protected]
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Summary

This paper presents a novel three-degree of freedom (DOF) sensorized remote-center-of-motion (RCM) ankle module for a military-purpose lower-limb exoskeleton. A military-purpose exoskeleton should assist and follow the fast and dexterous motion of a soldier in rough terrain environments. Among the lower-limb joints, the ankle joint plays an important role in stabilizing walking motion during the stance phase. Thus, aligning the rotation center of the ankle module with the center of the wearer’s ankle is very important to reduce potential risks and fatigue of a soldier. To this end, the ankle exoskeleton was designed using two spherical chains. The two spherical chains were designed such that the intersection of all revolute pairs, which consist of the spherical chains, is located close to the rotation center of the wearer’s ankle. In addition, three encoders are attached to each of the three revolute pairs of a spherical chain to measure the three-DOF orientation of the ankle mechanism. For the design, the required range of motion is analyzed via gait analysis in three environment conditions. Forward and inverse kinematic relations are derived, and the workspace of the ankle is analyzed. For the prototype ankle mechanism, the range of motion and measurement performance are verified by a static experiment. In addition, comparative studies between the proposed RCM ankle and an ankle mechanism with offset rotation center are performed for three walking conditions: level walking, ascending and descending stairs, and a vertical slope. Via comparative study, it is confirmed that, compared to the ankle mechanism with offset center of rotation, the proposed RCM ankle is advantageous for sensing wearer’s ankle motion and reducing mechanical interference to wearer’s natural ankle motion.

Keywords

ExoskeletonAnkle mechanismRCM mechanismSpherical linkageOrientation mechanism
Type
Articles
Information
Robotica , Volume 37 , Special Issue 12: Wearable Robotics: Dynamics, Control and Applications , December 2019 , pp. 2209 - 2228
Copyright
© Cambridge University Press 2019 

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References

Knapik, J., Harman, E. and Reynolds, K., “Load carriage using packs: A review of physiological, biomechanical and medical aspects,” Applied Ergonomics 27, 207–216 (1996).CrossRefGoogle ScholarPubMed
Hocoma, “Lokomat,” Available online at: http://www.hocoma.com/products/lokomat. Accessed January 10, 2018 (2016).Google Scholar
Choi, H., Park, Y. J., Seo, K., Lee, J., Lee, S. E. and Shim, Y., “A multifunctional ankle exoskeleton for mobility enhancement of gait-impaired individuals and seniors,” IEEE Robot. Autom. Lett. 3(1), 411–418 (2018).CrossRefGoogle Scholar
Hyun, D. J., Park, H., Ha, T., Park, S. and Jung, K., “Biomechanical design of an agile, electricity-powered lower-limb exoskeleton for weight-bearing assistance,” Robot. Auton. Syst. 95, 181–195 (2017).Google Scholar
Hayashi, T., Kawamoto, H. and Sankai, Y., “Control Method of Robot Suit HAL Working as Operator’s Muscle using Biological and Dynamical Information,” In: Proceedings of the IEEE/RSJ International Conference on IROS 2015, Hamburg, Germany (2015) pp. 3063–3068.Google Scholar
Lee, H., Kim, W., Han, J. and Han, C., “The technical trend of the exoskeleton robot system for human power assistance,” Int. J. Precis. Eng. Manufact. 13(8), 1491–1497 (2012).CrossRefGoogle Scholar
Lockheed, Martin, “HULC,” Available online at: http://www.lockheedmartin.com/content/dam/lockheed/data/mfc/pc/hulc/mfc-hulc-pc-01.pdf/products/hulc.html. Accessed October 1, 2018 (2014).Google Scholar
Kazerooni, H., Steger, R. and Huang, L., “Hybrid control of the Berkeley lower extremity exoskeleton (BLEEX),” Int. J. Robot. Res. 25(5–6), 561–573 (2006).CrossRefGoogle Scholar
Jacobsen, S. C., “On the Development of XOS, A Powerful Exoskeletal Robot,” Proceedings of the IEEE/RSJ International Conference on IROS, San Diego, USA (2007) p. 2007.Google Scholar
Kim, W. S., Lee, S. H., Lee, H. D., Yu, S. N., Han, J. S. and Hans, C. S., “Development of the Heavy Load Transferring Task Oriented Exoskeleton Adapted by Lower Extremity using Quasi-Active Joints,” Proceedings of the IEEE International Conference on ICCAS-SICE, Fukuoka (2009) pp. 1353–1358.Google Scholar
Veneman, J. F., Kruidhof, R., Hekman, E. E., Ekkelenkamp, R., Van Asseldonk, E. H. and Van Der Kooij, H., “Design and evaluation of the LOPES exoskeleton robot for interactive gait rehabilitation,” IEEE Trans. Neural Syst. Rehabil. Eng. 15(3), 379–386 (2007).CrossRefGoogle ScholarPubMed
Frey, M., Colombo, G., Vaglio, M., Bucher, R., Jorg, M. and Riener, R., “A novel mechatronic body weight support system,” IEEE Trans. Neural Syst. Rehabil. Eng. 13(3), 311–321 (2006).CrossRefGoogle Scholar
Low, K. H. and Yin, Y. H., “An integrated lower exoskeleton system towards design of a portable active orthotic device,” Int. J. Robot. Automat. 22, 32–42 (2007).Google Scholar
Liu, X., Low, K. H. and Yu, H. Y., “Development of a Lower Extremity Exoskeleton for Human Performance Enhancement,” Proceedings of the IEEE/RSJ International Conference on IROS, Sendai, Japan (2004) pp. 3889–3894.Google Scholar
Chin, R., Hsiao-Wecksler, E. T., Loth, E., Kogler, G., Manwaring, S. D., Tyson, S. N. and Gilmer, J. N., “A pneumatic power harvesting ankle-foot orthosis to prevent foot-drop,” J. Neuro. Eng. Rehabil. 6(1), 19 (2009).Google ScholarPubMed
Ferris, D. P., Czerniecki, J. M. and Hannaford, B., “An ankle-foot orthosis powered by artificial pneumatic muscles,” J. Appl. Biomech. 21(2), 189–197 (2005).CrossRefGoogle ScholarPubMed
Bharadwaj, K., Sugar, T. G., Koeneman, J. B. and Koeneman, E. J., “Design of a robotic gait trainer using spring over muscle actuators for ankle stroke rehabilitation,” J. Biomech. Eng. 127(6), 1009–1013 (2005).CrossRefGoogle ScholarPubMed
Browning, R. C., Modica, J. R., Kram, R. and Goswami, A., “The effects of adding mass to the legs on the energetics and biomechanics of walking,” Med. Sci. Sports Exer. 39(3), 515–525 (2007).CrossRefGoogle ScholarPubMed
Ferris, D. P., Sawick, G. S. and Daley, M. A., “A physiologist’s perspective on robotic exoskeletons for human locomotion,” Int. J. Hum. Rob. 4(3), 507–528 (2007).CrossRefGoogle ScholarPubMed
Donelan, J. M., Li, Q., Naing, V., Hoffer, J. A., Weber, D. J. and Kuo, A. D., “Biomechanical energy harvesting: Generating electricity during walking with minimal user effort,” Science 319(5864), 807–810 (2008).CrossRefGoogle ScholarPubMed
Witte, K. A., Zhang, J., Jackson, R. W. and Collins, S. H., “Design of Two Lightweight, High-bandwidth Torque-controlled Ankle Exoskeletons,” In: Proceedings of the IEEE International Conference on Robotics and Automation, Seattle, Washington, USA (2015) pp. 1223–1228.Google Scholar
Hong, M. B., Shin, Y. J. and Wang, J. H., “Novel Three-DOF Ankle Mechanism for Lower-Limb Exoskeleton: Kinematic Analysis and Design of Passive-Type Ankle Module,” Proceedings of the IEEE/RSJ International Conference on IROS, Chicago, USA (2014) pp. 504–509.Google Scholar
The sizekorea, Available online at: https://sizekorea.kr. Accessed October 1, 2018 (2015).Google Scholar
Brand, L., Vector and Tensor Analysis (John Wiley & Sons, Inc., New York, USA, 1948).Google Scholar
Tsai, L.-W., Robot Analysis: The Mechanics of Serial and Parallel Manipulators, (John Wiley & Sons, Inc., New York, USA, 1999).Google Scholar