Grasping damage analysis of apple by end-effector in harvesting robot

摘要

According to the grasping damage of apple during the process of robot picking apple, the variation of interior tensions inside the apple skin in the grasping process of apple with different type finger of robot end-effector is researched. The finite element model for apple is established by ANSYS. Some simulations for the grasping process of apple with plane and arc-shaped finger are carried out. The Von Mises stress nephograms of apple different tissue under different load force by different type fingers are obtained. The experimental results show that the apple cortex is more easily to get damaged due to its small failure stress. And the deformation and stress of apple caused by arc-shaped finger are smaller than by plane finger. At last, the actual experiment for apple grasping damage of end-effector with arc-shaped finger validates the reliability of simulated results. The research results demonstrated that the finite element method can make accurate evaluation for apple damage.