Autonomous Robots

, Volume 10, Issue 2, pp 203–212 | Cite as

A Stewart Platform-Based System for Ankle Telerehabilitation

  • M. Girone
  • G. Burdea
  • M. Bouzit
  • V. Popescu
  • J.E. Deutsch


The “Rutgers Ankle” is a Stewart platform-type haptic interface designed for use in rehabilitation. The system supplies six-DOF resistive forces in response to virtual reality-based exercises running on a host PC. The Stewart platform uses double-acting pneumatic cylinders, linear potentiometers as position sensors, and a six-DOF force sensor. The Rutgers Ankle controller contains an embedded Pentium board, pneumatic solenoid valves, valve controllers, and associated signal conditioning electronics. Communication with the host PC is over a standard RS232 line. The platform movement and output forces are transparently recorded by the host PC in a database. This database can be accessed remotely over the Internet. Thus, the Rutgers Ankle Orthopedic Rehabilitation Interface will allow patients to exercise at home while being monitored remotely by therapists. A prototype was constructed, and proof-of-concept trials were conducted at the University of Medicine and Dentistry of New Jersey. The results indicate that the system works well as a diagnostic tool. The subjective evaluation by patients was very positive. Further medical trials are needed before the system clinical efficacy in rehabilitation can be established.

telerehabilitation force feedback ankle rehabilitation virtual reality Stewart platform hexapod pneumatic robotics parallel robots 


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  1. Airpot Corporation. 1999. Scholar
  2. Biodex Medical Systems. 1999a. Biodex Balance System, Scholar
  3. Biodex Medical Systems. 1999b. Biodex Multi-Joint 3, Scholar
  4. Burdea, G. 1996. Force and Touch Feedback for Virtual Reality, John Wiley & Sons, Inc.: New York.Google Scholar
  5. Chandler, T.J. and Kibler, W.B. 1993. Muscle training in injury prevention. In Sports Injuries: Basic Principles of Prevention and Care, Oxford, p. 253.Google Scholar
  6. Data Instruments. 1999. Scholar
  7. Dieudonne, J.E., Parrish, R.V., and Bardusch, R.E. 1972. An Actuators Extension Transformation for a Motion Simulator and an Inverse Transformation Applying Newton-Raphson's Method. Langley Research Center. NASA. TN D-7067.Google Scholar
  8. DMSystems, Inc. 1999. Ankle Tough. Scholar
  9. Donatelli, R.A. 1996. The Biomechanics of the Foot and Ankle, F.A. Davis: Philadelphia.Google Scholar
  10. Engineering Animation, Inc. 1999. Scholar
  11. Girone, M.J. and Burdea, G.C. 1998. Ankle rehabilitation in virtual reality. Report to the National Science Foundation on grant BES-970802.Google Scholar
  12. Girone, M.J., Burdea, G.C., and Bouzit, M. 1999. The Rutgers ankle orthopedic rehabilitation interface. In Proc. of the ASME, Dynamic Systems and Control Division Vol. 67, pp. 305-312, International Mechanical Engineering Congress and Exposition.Google Scholar
  13. Girone, M.J., Burdea, G.C., Bouzit, M., Popescu, V., and Deutsch, J.E. 2000. Othopedic rehabilitation using the “Rutgers ankle” interface. In The Proc. of Medicine Meets Virtual Reality 2000, pp. 89-95.Google Scholar
  14. JR3, Inc. 1999. Scholar
  15. Kinetic Health Corporation. 1998. Wobble and Rocker Boards, Scholar
  16. Koepfer, C. 1997. “Hexapod-It'sWorking.” Modern Machine Shop Online. Scholar
  17. Laskowski, E.R., Newcomer-Aney, K., and Smith, J. 1997. Refining rehabilitation with proprioception training: Expediting return to play. The Physician and Sports Medicine, 25(10) October. http:// Scholar
  18. NASA Langley Research Center. 1999. Simulation systems branch. Visual motion simulator. Scholar
  19. Nguyen, C.C. and Pooran, F.J. 1989. Kinematic analysis and workspace determination of a 6 DOF CKCM robot end-effector. Journal of Mechanical Working Technology, 20:283-294.Google Scholar
  20. Oracle Co. 1995. Oracle User's Manual, Redwood City, CA.Google Scholar
  21. Patounakis, G., Bouzit M., and Burdea, G. 1998. Study of the electromechanical bandwidth of the Rutgers master. Technical Report CAIP-TR-225, Rutgers University, Piscataway, NJ.Google Scholar
  22. Perform Better. 1999. Biofoam Rollers. Scholar
  23. Polhemus Navigation Science Division. 1993. Insidetrak User's Manual, Colchester, VT, Mc-Donnell Douglas Electronics Co.Google Scholar
  24. Popescu, V., Burdea, G., Bouzit, M., and Hentz, V. 2000. A Virtual reality-based telerehabilitation system with force feedback. In IEEE Transactions on Information Technology in Biomedicine, 4(1):45-51.Google Scholar
  25. Post, W.R. 1998. Patellofemoral pain: Let the physical exam define treatment. In The Physician and Sportsmedicine. 26(1), January. Scholar
  26. Stewart, D. 1966. A platform with 6 degrees of freedom. In Proc. Of the Institution of Mechanical Engineers, pp. 1965-1966.Google Scholar
  27. Tropp, H. and Alaranta, H. 1993. Proprioception and coordination training in injury prevention. In Sports Injuries: Basic Principles of Prevention and Care, Oxford.Google Scholar
  28. Wilkerson, G.B. and Behan. E. Biodex Integrated Physical Rehabilitation. Distributed by Biodex Medical Systems.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • M. Girone
    • 1
  • G. Burdea
    • 1
  • M. Bouzit
    • 1
  • V. Popescu
    • 1
  • J.E. Deutsch
    • 2
  1. 1.CAIP CenterRutgers UniversityPiscatawayUSA
  2. 2.Program in Physical TherapyUMDNJ-SHRPNewarkUSA

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