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generalized jacobian

Robotica (1)

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1 results

The relationship between controlled joint torque and end-effector force in underactuated robotic systems
Jaeheung Park
Journal:

Robotica / Volume 29 / Issue 4 / July 2011

Published online by Cambridge University Press:

16 August 2010, pp. 581-584
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The generalized Jacobian matrix was introduced for dealing with end-effector control in space robots. One of the applications of this Jacobian is to be used in Jacobian transpose control to generate joint torques given end-effector position error. It would be misleading, however, to consider the transpose of this Jacobian as a mapping from end-effector force/moment to controlled joint torques for underactuated systems or floating base robots. This paper explains why it does not represent the mapping and provides a simple example. Later, the correct mapping is provided using the dynamically consistent Jacobian inverse and then a method to compute the actuated-joint torques is explained given the desired end-effector force. Finally, the effect of using the generalized Jacobian in the Jacobian transpose control is analyzed.