Theoretical and Experimental Study of a Thermo-Mechanical Model of a Shape Memory Alloy Actuator Considering Minor Hystereses

Rosen, M.; Todorov, T.; Fursov, A.; Ganev, B.

Авторы: Rosen M., Todorov T., Fursov A., Ganev B.
Журнал: Crystals
Том: 11
Номер: 9
Год издания: 2021
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 20
Номер статьи: 1120
DOI: 10.3390/cryst11091120
Аннотация: The paper presents a theoretical and experimental investigation of a thermo-mechanicalmodel of an actuator composed of a shape memory alloy wire arranged in series with a bias spring.The developed mathematical model considers the dynamics of the actuator in the thermal andmechanical domains. The modelling accuracy is increased through the developed algorithm formodelling the minor and sub minor hystereses, thus removing the disadvantages of the classicalmodel. The algorithm improves the accuracy, especially when using pulse-width modulation control,for which minor and sub minor hystereses are likely to occur. Experimental studies show thatthe system is very sensitive, and there are physical factors whose presence cannot be consideredin the mathematical model. The experimental research has shown that setting constant values ofthe duty cycle is impossible to obtain a stable value of displacement and force. The comparisonbetween the developed mathematical model results and the experimental results shows that thedifferences are acceptable. The improved modelling serves as a basis for designing such actuatorsand creating an improved automatic feedback control system to maintain a given displacement (force)or trajectory tracking.
Добавил в систему: Фурсов Андрей Серафимович

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Theoretical and Experimental Study of a Thermo-Mechanical Model of a Shape Memory Alloy Actuator Considering Minor Hysteresesстатья

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