Given a start pose and a goal pose, a large number of singularity-free poses are created randomly in the 6 dimensional task space, a short line segment is used to create a feasible path between two singularity-free po...Given a start pose and a goal pose, a large number of singularity-free poses are created randomly in the 6 dimensional task space, a short line segment is used to create a feasible path between two singularity-free poses. A well connected roadmap can be obtained and stored in the 6 dimension task space for a specific 6 DOF parallel manipulator in this way and a singularity-free path is queried to connect the start pose and the goal pose. So the singularity-free path planning between any two given poses for this parallel manipulator can be performed very efficiently. This singularity-free path planning method can be used with any type of parallel manipulator only if the matrix used can be given to define singularities.展开更多
Parallel manipulator systems as promising precision devices are used widely in current researches. A novel large workspace flexure parallel manipulator system utilizing wide-range flexure hinges as passive joints is p...Parallel manipulator systems as promising precision devices are used widely in current researches. A novel large workspace flexure parallel manipulator system utilizing wide-range flexure hinges as passive joints is proposed in this paper, which can attain sub-micron-scale precision over the cubic centimeter motion range. This paper introduces the mechanical system architecture based on the wide-range flexure hinges, analyzes the kinematics via stiffness matrices, presents the control system configuration and control strategy, and finally gives the system performance test results.展开更多
文摘Given a start pose and a goal pose, a large number of singularity-free poses are created randomly in the 6 dimensional task space, a short line segment is used to create a feasible path between two singularity-free poses. A well connected roadmap can be obtained and stored in the 6 dimension task space for a specific 6 DOF parallel manipulator in this way and a singularity-free path is queried to connect the start pose and the goal pose. So the singularity-free path planning between any two given poses for this parallel manipulator can be performed very efficiently. This singularity-free path planning method can be used with any type of parallel manipulator only if the matrix used can be given to define singularities.
文摘Parallel manipulator systems as promising precision devices are used widely in current researches. A novel large workspace flexure parallel manipulator system utilizing wide-range flexure hinges as passive joints is proposed in this paper, which can attain sub-micron-scale precision over the cubic centimeter motion range. This paper introduces the mechanical system architecture based on the wide-range flexure hinges, analyzes the kinematics via stiffness matrices, presents the control system configuration and control strategy, and finally gives the system performance test results.
