Modeling of Velocity-dependent Frictional Resistance of a Capsule Robot Inside an Intestine

作者: Cheng Zhang , Hao Liu , Renjia Tan , Hongyi Li

DOI: 10.1007/S11249-012-9980-1

关键词: Materials scienceMechanism (engineering)System of measurementViscoelasticityStress (mechanics)MechanicsMechanical engineeringDeformation (mechanics)BiomechanicsApparent viscosityStress relaxation

摘要: A model is first built for predicting the velocity-dependent frictional resistance of a capsule robot that moves inside intestine in paper. The plays more and important role checking diseases intestine. This study aims to optimize locomotion mechanism control strategy robot. consists three parts: environmental resistance, viscous friction, Coulomb friction. Environmental induced by stress due viscoelastic deformation intestinal wall. Viscous friction analyzed according apparent viscosity mucus. product local contact pressure coefficient. In order analyze effects deformation, five-element used describe relaxation material. Experimental investigation identify parameters with homemade physical simulation measurement system fixtures. Finally, model’s validity verified experimental results. It shown results can fit well when moving velocity lower than 20 mm/s. R 2 these two sets data 0.8769. But at higher velocity, there are significant differences between declines 0.1666. expected be useful development medical equipment biomechanics

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