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Proceedings Paper

Force control of a shape memory alloy wire using fuzzy controller
Author(s): Omid Rohani; Aghil Yousefi-Koma; Ayyoub Rezaeeian; Alireza Doosthoseini
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Paper Abstract

An experimental setup is designed and fabricated to measure the force induced by voltage in an SMA wire. Using autoregressive model with exogenous input (ARX) method for system identification of the experimental data, two appropriate transfer functions of the force in SMA wire versus the applied voltage during each of heating and cooling processes were derived. Afterwards, a conventional PID controller and a self-tuning fuzzy PID controller were designed to control the force in SMA wire. The latter control algorithm is used by tuning the parameters of the PID controller thereby integrating fuzzy inference and producing a fuzzy adaptive PID controller, which is used to improve the force control performance. The responses of the system with the both designed controllers for different inputs are simulated and compared to each other. At the end, simulation results show that in force control of the SMA wire, self-tuning fuzzy PID controllers are more efficient than conventional PID controllers.

Paper Details

Date Published: 3 April 2008
PDF: 10 pages
Proc. SPIE 6926, Modeling, Signal Processing, and Control for Smart Structures 2008, 692611 (3 April 2008); doi: 10.1117/12.776405
Show Author Affiliations
Omid Rohani, Univ. of Tehran (Iran)
Aghil Yousefi-Koma, Univ. of Tehran (Iran)
Ayyoub Rezaeeian, Univ. of Tehran (Iran)
Alireza Doosthoseini, Univ. of Tehran (Iran)

Published in SPIE Proceedings Vol. 6926:
Modeling, Signal Processing, and Control for Smart Structures 2008
Douglas K. Lindner, Editor(s)

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