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Article Dans Une Revue Journal of Intelligent Material Systems and Structures Année : 2023

Accurate sensorless displacement control based on the electrical resistance of the shape memory actuator

Résumé

This paper aims to implement the controllable deformation of a structure using Shape Memory Alloys (SMA) actuators. A sensorless displacement estimation method is proposed. This method is tested on a prototype composed of a disc, beams, and SMA actuators. By measuring the variation of electrical resistivity in SMA springs, as a feedback signal in the closed-loop position control, the surface displacement is obtained without any external displacement sensor. The proposed method is validated by comparing the displacement values estimated by the electrical resistivity measurement with those measured by a laser sensor. The estimated displacement and the measured displacement follow the reference displacement with steady-state errors, respectively of 1.14% and 0.42%.
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Dates et versions

hal-04097781 , version 1 (15-05-2023)

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Ali Berhil, Mahmoud Barati, Yves Bernard, Laurent Daniel. Accurate sensorless displacement control based on the electrical resistance of the shape memory actuator. Journal of Intelligent Material Systems and Structures, 2023, 34 (9), pp.1097-1103. ⟨10.1177/1045389X221128568⟩. ⟨hal-04097781⟩
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