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  Control Strategies for Integration of Electric Motor Assist and Functional Electrical Stimulation in Paraplegic Cycling : Utility for Exercise Testing and Mobile Cycling

Hunt, K. J., Stone, B., Negard, N.-O., Schauer, T., Fraser, M. H., Cathcart, A. J., et al. (2004). Control Strategies for Integration of Electric Motor Assist and Functional Electrical Stimulation in Paraplegic Cycling: Utility for Exercise Testing and Mobile Cycling. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 12, 89-101. doi:10.1109/TNSRE.2003.819955.

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Hunt, K. J.1, Autor
Stone, B.1, Autor
Negard, N.-O.1, 2, Autor           
Schauer, T.1, 2, Autor           
Fraser, M. H.3, Autor
Cathcart, A. J.4, Autor
Ferrario, C.1, Autor
Ward, S. A.5, Autor
Grant, S.4, Autor
Affiliations:
1Centre for Rehabilitation Engineering, Department of Mechanical Engineering, University of Glasgow, James Watt, Glasgow G12 8QQ, Scotland, U.K, ou_persistent22              
2Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738154              
3Queen Elizabeth National Spinal Injuries Unit, Southern General Hospital NHS Trust, Glasgow G51 4TF, U.K., ou_persistent22              
4Centre for Exercise Science and Medicine, Faculty of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, U.K., ou_persistent22              
5School of Sport and Exercise Science, University of Leeds, Leeds, LS2 9JT, U.K., ou_persistent22              

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 Zusammenfassung: Aim: The aim of this study was to investigate feedback control strategies for integration of electric motor assist and functional electrical stimulation for paraplegic cycling, with particular focus on development of a testbed for exercise testing in FES cycling, in which both cycling cadence and workrate are simultaneously well controlled and contemporary physiological measures of exercise performance derived. A second aim was to investigate the possible benefits of the approach for mobile, recreational cycling. Methods: A recumbent tricycle with an auxiliary electric motor is used, which is adapted for paraplegic users, and instrumented for stimulation control. We propose a novel integrated control strategy which simultaneously provides feedback control of leg power output (via automatic adjustment of stimulation intensity) and cycling cadence (via electric motor control). Both loops are designed using system identification and analytical (model-based) feedback design methods. Ventilatory and pulmonary gas exchange response profiles are derived using aportable system for real-time breath-by-breath acquisition. Results: We provide indicative results from one paraplegic subject in which a series of feedback-control tests illustrate accurate control of cycling cadence, leg power control, and external disturbance rejection. We also provide physiological response profiles from a submaximal exercise step test and a maximal incremental exercise test, as facilitated by the control strategy. Conclusion: The integrated control strategy is effective in facilitating exercise testing under conditions of well-controlled cadence and power output. Our control approach significantly extends the achievable workrate range and enhances exercise-test sensitivity for FES cycling, thus allowing a more stringent characterisation of physiological response profiles and estimation of key parameters of aerobic function. We further conclude that the control approach can significantly improve the overall performance of mobile recreational cycling.

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Sprache(n): eng - English
 Datum: 2004
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 207694
Anderer: 37/04
DOI: 10.1109/TNSRE.2003.819955
 Art des Abschluß: -

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Titel: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 12 Artikelnummer: - Start- / Endseite: 89 - 101 Identifikator: -