H∞ robust control design for unsupported paraplegic standing: experimental evaluationHolderbaum, W., Hunt, K. J. and Gollee, H. (2002) H∞ robust control design for unsupported paraplegic standing: experimental evaluation. Control Engineering Practice, 10 (11). pp. 1211-1222. ISSN 0967-0661 Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1016/S0967-0661(02)00082-5 Abstract/SummaryThis paper is concerned with the design of robust feedback H~-control systems for the control of the upright posture of paraplegic persons standing. While the subject stands in a special apparatus, stabilising torque at the ankle joint is generated by electrical stimulation of the paralyzed calf muscles. Since the muscles acting as actuators in this setup show a significant degree of nonlinearity, a robust H~-control design is used. The design approach is implemented in experiments with a paraplegic subject. The results demonstrate good performance and closed loop stability over the whole range of operation.
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