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Development of rate independent Prandtl-Ishlinskii model for characterizing asymmetric hysteresis nonlinearities of SMA actuators

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3 Author(s)
Al Janaideh, M. ; Dept. of Mech. & Ind. Eng., Concordia Univ., Montreal, QC ; Chun-Yi Su ; Rakheja, S.

Shape memory alloy actuators (SMA) show asymmetric hysteresis loops between the input current and output displacement. Furthermore, the SMA actuators exhibit saturated output displacement at maximum and/or minimum input. A generalized Prandtl-Ishlinskii model is formulated to model hysteresis nonlinearities of SMA actuators. In this model, a generalized play hysteresis operator is proposed and integrated with a density function to construct generalized Prandtl-Ishlinskii model. The formulated generalized Prandtl-Ishlinskii model can also describe hysteresis loops with saturated output displacement. The results suggest that unlike the classical Prandtl-Ishlinskii model, the proposed Prandtl-Ishlinskii can effectively characterize hysteresis nonlinearities of the SMA actuators.

Published in:

Advanced Intelligent Mechatronics, 2008. AIM 2008. IEEE/ASME International Conference on

Date of Conference:

2-5 July 2008