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Experimental dual-mode control of a flexible robotic arm
Woosoon Yim, Jichun Zuang, Sahjendra Singh
Journal:

Robotica / Volume 10 / Issue 2 / March 1992

Published online by Cambridge University Press:

09 March 2009, pp. 135-145
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This paper focuses on the implementation of a dual-mode controller for the maneuver of a single link flexible robotic arm. The joint angle trajectory tracking is accomplished by a proportional and derivative PD and a feedforward controller. Based on the pole placement technique, a linear stabilizer is designed for elastic mode stabilization. The stabilizer is switched on when the trajectory reaches the vicinity of the terminal state, and the effect of switching time on arm vibration is investigated. An optical deflection sensor is used for on-line measurements of elastic deflections, and also used for the prediction of the static deflection of the arm in the target position. The robustness of the linear stabilizer at varying pay loads is presented.