This paper discusses an inverse problem where internal stiffness parameters are determined by both applied force and deformation of object. By supposing a soft tissue, we first propose the simplest tissue model that can express the coupling effect where the tissue deforms not only at the point of force application but also its surrounding area. We explain the way for determining the internal stiffness parameters for the proposed model and show that we can nicely reconstruct the deformation of tissue, even for the sensing condition where we can utilize only point force and point deformation.
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