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The effect of variable mechanical impedance on the control of antagonistic muscles. (English) Zbl 0736.92006

Summary: Most models of muscle have assumed that the series elastic element has a constant stiffness, although experimentally this is not true, either at the level of individual cross-bridges or that of the whole muscle. In this paper elastic and viscous elements are introduced whose properties vary systematically with activity levels as has been found experimentally. The effects of these nonlinear variations on the methods for optimally controlling a pair of antagonistic muscles are calculated. Although the nonlinarities add some complexity to the derivation and are important to the mechanism of force generation in the muscle, they do not qualitatively change the overall control of movement.

MSC:

92C10 Biomechanics
93C15 Control/observation systems governed by ordinary differential equations
74L15 Biomechanical solid mechanics
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