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This paper proposes an innovative design for a parallel manipulator that can be applied to a machine tool. The proposed 3-SPS-1-S parallel manipulator has three pure rotation degrees of freedom, including three SPS Active Legs and one passive constraining leg. The passive leg is introduced into this new parallel manipulator in order to increase the(More)
For hydraulic excavators, functions and reliability are important technical indicators. Previous mechanism analyses using finite element (FE) method have produced some computational results with only modest accuracies. The present study investigates a working mechanism of an excavator in its entirety from a system-integration viewpoint. Based on(More)
In this paper, kinematic performance of a new spatial rotation 4-SPS-1-S parallel robot mechanism is investigated. The 4-SPS-S parallel robot mechanism has spatial three pure rotation degrees of freedom, it can achieve spatial roll, pitch and yaw rotation movements, and possesses high bearing capacity, stiffness and stability. Inverse position analysis and(More)
The paper studies sheet metal forming process using finite element analysis for large elastic-plastic deformation, offering both theoretical and methodological contributions to the subject. Sheet bending process is simulated using finite element analysis software ANSYS. The springback phenomenon is examined in great details. Taking A3 sheet as a specimen,(More)
The driving system of cutter head is the key part of shield machine, it is also a technological bottleneck in the design and production of tunneling shield currently in China. This paper combines reliability design and optimization design to produce a reliability optimization scheme of main driving gear transmission of shield machine. It uses Kriging model(More)
This paper proposes a new parallel manipulator with three purely rotational degrees of freedom, which consists of four SPS active legs and one passive constraining leg. The passive leg is introduced into this new parallel manipulator in to increase load capacity, stiffness and reliability of the structure, and to eliminate any redundant motion. Kinematic(More)
The paper focuses on a spatial rotation three Degree of Freedom (DOF) 4-SPS-S parallel robot mechanism, which has four SPS Active Legs and one passive constraining leg. The geometric model of the parallel robot mechanism is introduced, and then velocity mapping equation and Jacobian matrix for the robot mechanism are developed. Based on principle of virtual(More)
In this paper, singular configurations of a new spatial rotation 4-SPS-1-S parallel manipulator are examined. The 4-SPS-S parallel manipulator has 3 purely rotational degrees of freedom in the space, and can perform spatial roll, pitch and yaw rotation motions. It possesses high load capacity, stiffness and stability. Inverse position analysis and velocity(More)
Load capacity of a spatial rotation 4-SPS-S parallel manipulator has been studied in this paper. The 4-SPS-S parallel manipulator has spatial three pure rotation degrees of freedom, including four SPS active legs and one passive constraining leg, which can be used as heavy-loading vehicle kinematic simulation devices, precise positioning mechanism of tunnel(More)
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