Abstract
The object of this paper is to present a real-time application of an artificial neural network (ANN). The application for which this network is demonstrated is a motorised orthosis with six degrees-of-freedom for use by a paraplegic; a ‘walking machine’. Theoretical networks and training methods need modification to function correctly with a real application. Several complex phenomena that are very diffucult to model have to be accommodated; the starting threshold of the activators, nonlinearity, noise, and the non-biunivocity between successive system states (position, velocity, actuator controls). The modifications made to the network and the associated training method partially alleviate these difficulties.
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References
Abbas, J. J., andChizec, H. J. (1991): ‘A neural controller for functional neuromuscular stimulation systems’,Proc. IEEE Eng. Med. Biol. Soc.,13, pp. 1456–1457
Beckmann, J., Daunicht, W. J., andHömberg, V. (1992): ‘Control of a paraplegic patient’. Proc. ICANN 92, Brighton, UK 4–7 September
Bleuler, H., Diez, D., Lauber, G., Meyer, U., andZlatnik, D. (1990): ‘Non-linear neural network control with application example’. Proc. INNC 90, Paris, France,1, pp. 201–204
Colombano, P., Compton, M., andBualat, M. (1991): ‘Goal directed model inversion: adaptation to unexpected model changes’. Proc. Neuro-Nîmes, Nîmes, France, 4–8 November, pp. 269–278
Hornik, K., Stinchcombe, M., andWhite, H. (1990): ‘Universal approximation of an unknown mapping and its derivatives using multilayer feedforward networks’,Neural Netw.,3, pp. 551–560
Jacobs, R. A. (1988): ‘Increased rates of convergence through learning rate adaptation’,,1, pp. 295–307
Phillips, C. A., andHendershot, D. M. (1991): ‘A system approach to medically prescribed functional electrical stimulation. Ambulation after spinal cord injury’,Paraplegia,29, pp. 505–513
Rabischong, E., Sgarbi, F., Rabischong, P., Detriche, J. M., Pinguet, N., andRiwan, A. (1990): ‘Control and command of a six degrees of freedom active electrical orthosis for paraplegic patient’. Proc. IEEE Int. Workshop on Intelligent robots and systems, pp. 987–991
Rose, G. K. (Ed.) (1986): ‘Orthotics, principles and practice’ (William Heinemann Medical Books, London, UK) pp. 176–189
Rumelhart, D. E., andMacClelland, C. L. (Eds.) (1986): ‘Parallel distributed processing, exploration in the microstructure of cognition’ (PDP Research Group, MIT Press, Cambridge, Massachusetts, USA) Vol. 1
Tollenaere, T. (1990): ‘SuperSAB: fast adaptative back propagation with good scaling properties’,Neural Netw.,3, pp. 561–573
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Guiraud, D. Application of an artificial neural network to the control of an active external orthosis of the lower limb. Med. Biol. Eng. Comput. 32, 610–614 (1994). https://doi.org/10.1007/BF02524234
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DOI: https://doi.org/10.1007/BF02524234