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Compensation of symmetric and asymmetric hysteresis nonlinearities in smart actuators with a generalized Prandtl-Ishlinskii presentation

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3 Author(s)
Janaideh, M.A. ; Dept. of Mechatron. Eng., Univ. of Jordan, Amman, Jordan ; Chun-Yi Su ; Rakheja, S.

Smart actuators employed in micropositioning are known to exhibit strong saturated hysteresis nonlinearities, which may be asymmetric and could adversely affect the positioning accuracy. In this paper, the analytical inverse of a generalized Prandtl-Ishlinskii model is formulated to compensate for hysteresis nonlinearities of smart actuators. The inverse of the generalized model is formulated using the inverse of the classical model together with those of the envelope functions of the generalized play operator. The effectiveness of the inverse of the generalized model in compensating for the symmetric and asymmetric saturated hysteresis effects is subsequently investigated through simulations for a magnetostrictive and a SMA actuators and through preliminary experiments performed on a piezo micropositioning stage. The simulation results suggest that the inverse of the generalized Prandtl-Ishlinskii model can be conveniently applied as a feedforward compensator to effectively mitigate the effects of symmetric as well as asymmetric saturated hysteresis in smart actuators.

Published in:

Advanced Intelligent Mechatronics (AIM), 2010 IEEE/ASME International Conference on

Date of Conference:

6-9 July 2010