tailieunhanh - Advances in Robot Kinematics - Jadran Lenarcic and Bernard Roth (Eds) Part 12

Tham khảo tài liệu 'advances in robot kinematics - jadran lenarcic and bernard roth (eds) part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Fully-Isotropic Hexapods 327 Figure 2. Example of fully-isotropic hexapod Isoglide6-E1 a and its associated graph b . Figure 3. Example of fully-isotropic hexapod Isoglide6-E2 a and its associated graph b . 328 G. Gogu joints or by introducing some new joints with idle mobilities to obtain non overconstrained isostatic solutions. Due to space limitations we have reduced our presentation in this paper to fully-isotropic overconstrained solutions without idle mobilities integrating just revolute and prismatic pairs in the legs A B and C. The two examples presented in Figs. 2 and 3 have elementary legs A B and C of type R R R Fig. 2 and complex legs A B and C of type R Rbi R Fig. 3 . The workspace of these solutions must be correlated with the angular capability of the homokinetic joints and translational capability of the telescopic shafts. 3. Conclusions An approach has been proposed for structural synthesis of a family of 2197 fully-isotropic hexapods with six degrees of mobility called Isoglide6-E. Special legs were conceived to achieve fully-isotropic conditions. The Jacobian matrix mapping the joint and the operational vector spaces of the fully-isotropic hexapods presented in this paper is the 6x6 identity matrix throughout the entire workspace. These solutions realize a one-to-one mapping between the actuated joint velocity space and the operational velocity space. The condition number and the determinant of the Jacobian matrix being equal to one the manipulator performs very well with regard to force and motion transmission. Moreover the solutions of fully-isotropic hexapods presented in this paper have all actuators mounted directly on the fixed base. As far as we are aware this paper presents for the first time fully-isotropic parallel manipulators with six degrees of freedom and a method for their structural synthesis. 4. Acknowledgement This work was sustained by CNRS The French National Council of Scientific Research in the frame of the projects .

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.