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Control Aspects of Prosthetics and Orthotics. Proceedings of by R. M. Campbell

By R. M. Campbell

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Extra resources for Control Aspects of Prosthetics and Orthotics. Proceedings of the IFAC Symposium, Ohio, USA, 7–9 May 1982

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By running the simulation as each parameter was varied throughout its physical­ ly realizable range, the effects on the per­ formance of the system could be ascertained, and the set of parameters chosen which best produces a normal knee moment-knee angle tra­ jectory while maintaining the highest possi­ ble reservoir pressure. Of principle interest was the stroke length and bore of the cylinder. Also of interest was the moment arm produced at the knee by the attachment of the device. Given that the attachment point at the thigh is largely predetermined by the desire for cosmesis, there remained the freedom of choosing the attachment point at the shank.

The choice of a locomotion mode depends upon the manner in which the human desires to proceed toward his destination and the obstacles which lie in his path. The process of locomotion is effective in that it is flexible enough to adjust to a wide range of demands. ) by varying the set of actuator signals through time. Many locomotion studies have been performed to quantify and understand the patterns and functions of the different body segments (Bresler and Berry, 1953; Klopsteg and Wilson, 1968; Morrison, 1970; Bresler, Radcliffe and Berry, 1957).

Fig. 4. X L DYNAMICS| Λ f i 1- kl* TLEG JATOR 1 Thigh-actuator-shank model. Experimental A/K P r o s t h e s i s . Copyright © IFAC Control Aspects of Prosthetics and Orthotics Ohio, USA, 1982 MULTI-MODE ABOVE-KNEE PROSTHESIS CONTROLLER D. L. Grimes and W. C. Flowers Department of Mechanical Engineering—3-453, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Abstract. In an effort to improve the mobility of above-knee (A/K) amputees, an active multi-mode control scheme has been developed and implemented on a laboratory restricted man-interactive prosthesis simulator system.

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