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Introduction to Robotics (CS223A) Homework #3 Solution ...

Introduction to Robotics (CS223A) Homework #3 Solution (Winter 2007/2008) are given that a certain RPR manipulator has the following transformationmatrices, where{E}is the frame of the end c1 s10 0s1c10 000 1 000 0 1 ,03T= c1c3 c1s3 s1L1c1 s1d2s1c3 s1s3c1L1s1+c1d2 s3 c3000001 ,0ET= s1c1s3c1c3L1c1+L2c1c3 s1d2c1s1s3s1c3L1s1+L2s1c3+c1d20c3 s3 L2s30001 Derive the basic Jacobian relating joint velocities to the end-effector s linear andangular velocities in frame{0}.ForJv, we simply differentiate the position of the end-effector expressed in frame{0}, whichis the last column of04T. ForJ we take the z-vectors from01 Tand03T, and since joint 2 isprismatic, it doesn t L1s1 L2s1c3 c1d2 s1 L2c1s3L1c1+L2c1c3 s1d2c1 L2s1s300 L2c3 J = 0 0 s10 0c11 00 the planar PR manipulator shown here:(a)Find the origin of frame{3}expressed in terms of frame{0}, that : you can derive this geometrically, if you want to avoid going throughDH s simplest to do this geometrically.

Introduction to Robotics (CS223A) Homework #3 Solution (Winter 2007/2008) 1. You are given that a certain RPR manipulator has the following transformation matrices, where {E} is the frame of the end effector. 0 1T = 2 6 6 6 4 c1 −s1 0 0 s1 c1 0 0 0 0 1 0 0 0 0 1 3 7 7 7 5, 0 3T = 2 6 6 6 4 c1c3 −c1s3 −s1 L1c1 −s1d2 s1c3 −s1s3 c1 L1s1 ...

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