ARX model of human thumb flexor muscle dynamics applicable to synthesis of myoelectric hand

The purpose of this study was to identify dynamics of flexor pollicis longus (FPL) muscle including short latency stretch reflex for synthesis of a myoelectric hand. First, force response to ramp stretch was measured with varying isometric force. Then a third order ARX (autoregressive with exogenous input) model, was used to express the force response. Determined ARX model was also expressed with a transfer function.