Design and Development of Ankle-Foot Rehabilitation Exerciser (AFRE) System Using Pneumatic Actuator

Khairuddin Osman, Ahmad 'Athif Mohd Faudzi, M.F. Rahmat, Chai Chang Kai, Koichi Suzumori


This research presents the design and development of a novel strategy for an Ankle-Foot Rehabilitation Exerciser (AFRE) system. AFRE system can be used Continuous Passive Motion (CPM) device and strength endurance training device for early stage functional rehabilitation. The designed mechanism can allow desired maximum and minimum Range of Motion (ROM) for dorsiflexion and plantar flexion (upwards and downwards stretching). This device consists of a new moveable mechanism design prototype using a new double acting Intelligent Pneumatic Actuator (IPA), embedded controller and communication protocol. The drive system consists of a nonlinear moving pneumatic actuator that controls the angle position, force and compliance for stiffness characteristic of the ankle-foot orthosis platform. In addition, the device can be configured through MATLAB via personal computer where the user can adjust the required ROM and resistance for the user in real-time. Analysis carried out during the system validation and testing through selected subjects are presented and discussed. This AFRE system is expected to substitute the traditional therapy and motorized rehabilitation device to increase the healing time of the patient specifically.


Intelligent Pneumatic Actuator (IPA); AnkleFoot Rehabilitation Exerciser (AFRE); Predictive Functional Control (PFC);

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Won-Kyung Song, Heyoung Lee, Zeungnam Bien, “Robotics Applications at FLINS'98KARES: Intelligent Wheelchair-Mounted Robotic Arm System Using Vision and Force Sensor”, Robotics and Autonomous Systems, vol. 28, no. 1, pp. 83-94, 1999.

Mingming Zhang, T Claire Davies and Shane Xie, "Effectiveness of robot-assisted therapy on ankle rehabilitation – a systematic review," Journal of NeuroEngineering and Rehabilitation, Vol. 10, No. 30, Doi: 10.1186/1743-0003-10-30, pp. 1-16, 2013.

Pengju Sui, Ligang Yao, Jian S. Dai, and Hengli Wang, "Development and Key Issues of the Ankle Rehabilitation Robots," in 13th World Congress in Mechanism and Machine Science, Guanajuato, México, pp. 1-8, 19- 25 June, 2011

J. Yoon, J. Ryu and K.-B. Lim, "Reconfigurable ankle rehabilitation robot for various exercises," Journal of Robotic Systems, Vol. 22, pp. S15-S33, 2006.

Girone, M., G. Burdea, M. Bouzit, "The Rutgers ankle orthopedic rehabilitation interface," Proceedings of the ASME Haptics Symposium. DSC-Vol. 67, pp. 305-312, 1999

L. Gengqian, G. Jinlian, Y. Hong, Z. Xiaojun and L. Guangda, "Design and Kinematics Simulation of Parallel Robots for Ankle Rehabilitation," in Proceedings of the 2006 IEEE International Conference on Mechatronics and Automation, pp. 1109-1113, 2006.

M. Girone, G. Burdea, M. Bouzit and V. Popescu, “A Stewart PlatformBased System for Ankle Telerehabilitation, Journal Autonomous Robots,” Vol. 10 No. 2, pp. 203–212, Doi: 10.1023/A:1008938121020, 2001

J. Dai, T. Zhao and C. Nester, "Sprained Ankle Physiotherapy Based Mechanism Synthesis and Stiffness Analysis of a Robotic Rehabilitation Device," Journal Autonomous Robots, Vol. 16, No. 2, pp. 207- 218, 2004.

D. P. Ferris, J. M. Czerniecki, and B. Hannaford, “An Ankle-Foot Orthosis Powered by Artificial Pneumatic Muscles,” J. Appl. Biomech., Vol. 21, pp. 189–197, May 2005.

N. Saga and N. Saito, "Rehabilitation instrument for prevent contracture of ankle using the pneumatic balloon actuator," in 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS 2008), pp. 4294-4297, 2008.

N. Saga, N. Saito, and J. Nagase, “Ankle Rehabilitation Device to Prevent Contracture Using a Pneumatic Balloon Actuator,” International Journal of Automation Technology, Vol.5, No.4, pp. 538- 543, 2011

L. Xiao, X. Hong and G. Ting, "Development of Legs Rehabilitation Exercise System Driven by Pneumatic Muscle Actuator," in The 2nd International Conference on Bioinformatics and Biomedical Engineering (ICBBE 2008), pp. 1309-1311, 2008.

Chin R, Hsiao-Wecksler E, Loth E, Kogler G, Manwaring S, Tyson S, Shorter K, Gilmer J., “A Pneumatic Power Harvesting Ankle-foot Orthosis to Prevent Foot-drop,” Journal of NeuroEngineering and Rehabilitation, Vol. 6, No. 1, pp. 1-11, 2009.

K. Alex Shorter, Geza F. Kogler, Eric Loth, William K. Durfee, Elizabeth T. Hsiao-Wecksler, “A Portable Powered Ankle-foot Orthosis for Rehabilitation, ” Journal of Rehabilitation Research & Development, Vol. 48, No. 4, pp. 459-472, Doi:10.1682/JRRD.2010.04.0054, 2011.

Sawicki G. S., Ferris D. P., “A Pneumatically Powered Knee-AnkleFoot Orthosis (KAFO) with Myoelectric Activation and Inhibition,” Journal of Neuroengineering and Rehabilitation, Vol. 23, No. 6, Doi: 10.1186/1743-0003-6-23 2009,

J. A. Blaya and H. Herr, "Adaptive control of a variable-impedance ankle-foot orthosis to assist drop-foot gait," in IEEE Transactions on Neural Systems and Rehabilitation Engineering, vol. 12, no. 1, pp. 24- 31, March 2004.

Ahmad 'Athif Mohd Faudzi, "Development of Intelligent Pneumatic Actuators and Their Applications to Physical Human-Mechine Interaction System," Ph.D. thesis, The Graduate School of Natural Science and Technology, Okayama University, Japan, September, 2010.

A.A.M. Faudzi, K. Suzumori and S. Wakimoto, "Development of an Intelligent Pneumatic Cylinder for Distributed Physical HumanMachine Interaction", Advanced Robotics, vol. 23, pp. 203-225, January 2009.

A.A.M. Faudzi, K. Suzumori and S. Wakimoto, "Development of an Intelligent Chair Tool System Applying New Intelligent Pneumatic Actuators", Advanced Robotics, vol. 24, pp. 1503–1528, July 2010.

A.A.M. Faudzi and K. Suzumori, "Programmable System on Chip Distributed Communication and Control Approach for Human Adaptive Mechanical System", Journal of Computer Science, vol. 6, no.8, pp. 852-861, July 2010.


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