Attempts to build a position-control servomechanism actuated by amplitude or some other function of muscle potential, would be frustrated by the inherent noisy signal properties. As position control is desirable, suitable processing techniques must be established. Original experiments designed to evolve such techniques are presented and their significance is analysed. The principal conclusion of the experiments is that linear filtering methods cannot produce a sufficiently noise-free signal. It is possible, however, that non-linear filtering techniques will be adequate.
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