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A comparison of position and rate control for telemanipulations with consideration of manipulator system dynamics

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4 Author(s)
Kim, W.S. ; University of California, Berkeley, CA, USA ; Tendick, F. ; Ellis, S.R. ; Stark, L.W.

Position and rate control are the two common manual control modes in teleoperations. Human operator performance using the two modes is evaluated and compared. Simulated three-axis pick-and-place operations are used as the primary task for evaluation. First, ideal position and rate control are compared by considering several factors, such as joystick gain, joystick type, display mode, task, and manipulator work space size. Then the effects of the manipulator system dynamics are investigated by varying the natural frequency and speed limit. Experimental results show that ideal position control is superior to ideal rate control, regardless of joystick type or display mode, when the manipulation work space is small or comparable to the human operator's control space. Results also show that when the manipulator system is slow, the superiority of position control disappears. Position control is recommended for small-work-space telemanipulation tasks, while rate control is recommended for slow wide-work-space telemanipulation tasks.

Published in:

Robotics and Automation, IEEE Journal of  (Volume:3 ,  Issue: 5 )

Date of Publication:

October 1987

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