tailieunhanh - Advanced Strategies For Robot Manipulators Part 11

Tham khảo tài liệu 'advanced strategies for robot manipulators part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | An Improved Adaptive Kinematics Jacobian Trajectory Tracking of a Serial Robot Passing Through Singular Configurations 291 Rotation matrix A T A A A A A A END-EFFECTOR 6 1. 2. 3. 4. 5. 6 Perspective transformation I Position vector I -------- I Scaling n x sx n s y y n s z z 0 0 a x px ay py az pz 0 1 7 Fig. 1. a Joint angles and end-effector s coordinates forward kinematics . b Combination of all possible joint angles Inverse Kinematics . Where n Normal vector of the hand. Assuming a parallel-jaw hand it is orthogonal to the fingers of the robot arm. a Sliding vector of the hand. It is pointing in the direction of the finger motion as the gripper opens and closes. a Approach vector of the hand. It is pointing in the direction normal to the palm of the hand . normal to the tool mounting plate of the arm . p Position vector of the hand. It points from the origin of the base coordinate system to the origin of the hand coordinate system which is usually located at the center point of the fully closed fingers. The orientation of the hand is described according to the RPY rotation as RPY Px Py Pz Rot ZW Pz .Rot Yw Py .Rot Xw Px 8 After T6 matrix is solved Pz ATAN 2 ny nx 9 py ATAN2 -nz nx cospz ny sinpz 10 p ATAN2 a sinp - a cosp p cosp - p sinp x xzyzyzxz 11 292 Advanced Strategies for Robot Manipulators Fig. 2. Schematic diagram for a general 6 DOF serial robot showing the wrist mechanism These equations describe the orientation according to the RPY representation Karilk Aydin 2000 . To find the IK solution however joints angels are found according to the manipulator s end position described with respect to the world coordinate system. IK solution can be shown as a function IK X Y Z px Py pz Ớ1 Ớ2 Ớ3 Ớ4 Ớ5 Ớ6 12 Traditional methods for solving the IK problem are inadequate if the structure of the robot is complex besides these methods suffer from the fact that the solution does not give a clear indication on how to select an appropriate solution from the several .

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.