An exoskeleton can help older aged adults stay independent for a longer time by augmenting their torque at weakened joints. Predictive models are useful to develop an exoskeleton and assess the effect of exoskeleton s on the user. Existing models that predict the effect of the exoskeleton on the user use a pre-defined motion which does not change when the forces applied by the exoskeleton change. In our work, we capture the effect of the exoskeleton on the user’s motion by a fitted muscle reflex model and a musculoskeletal model. The model explains the motion deviation with respect to a base motion, as opposed to a steady pose. In an experiment a base motion is perturbed with an external torque. The resulting predicted motion correlates well with the measured motion. As the response of a mechanical system due to forces is well known, the dynamic interaction, incorporating changes in the motion, between an exoskeleton and its user can be predicted with the reflex model.
CITATION STYLE
De Kruif, B. J., Schmidhauser, E., Stadler, K. S., & O’Sullivan, L. (2017). Reflex Response Modelling of Exoskeleton-User Interaction. In Biosystems and Biorobotics (Vol. 15, pp. 1085–1089). Springer International Publishing. https://doi.org/10.1007/978-3-319-46669-9_176
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