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To further improve the precision of sizable Stewart platform-based force/torque sensor with general spherical joints in existing manufacture and calibration techniques, substituting spherical joints with three equivalent revolute joints, the paper presents the friction model of sizable parallel 6-axis force sensor with Stewart structure based on the screw theory and theory of influence coefficient...
To investigate the stiffness performance of planar parallel 3-RRR mechanism with flexible joints, the paper solve the first-order and second-order influence coefficient of the mechanism, and give the mechanism kinematics simulation. Based on the principle of virtual work, the constraint equation of the mechanism is established, and the stiffness matrix is deduced. In addition, the direction stiffness...
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