Experimental Validation of Condition Monitoring for Electrically Activated Shape Memory Alloys for an Unlocking Device

2nd International Conference on Civil Engineering and Materials Science

Rathmann, Christian^1 ; Theren, Benedict^1 ; Fleczok, Benjamin^1 ; Kuhlenkötter, Bernd^1

Ruhr-University of Bochum, Universitatsstraße 150, Bochum

44801, Germany^1

关键词: Activated shape memory;    Condition monitoring systems;    Experimental validations;    Resistance behaviors;    Shape memory actuators;    Shape memory alloys(SMA);    System state;    Technical systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/216/1/012010/pdf
DOI  :  10.1088/1757-899X/216/1/012010

来源: IOP

【 摘 要 】

Shape memory alloys (SMA) belong to the group functional materials which can be activated thermally. Along with a phase transformation, they can remember a previously imprinted shape and have a special resistance behavior. Therefore, they can also be used as a sensor and may be capable of detecting various system states in technical systems. This paper makes a contribution by evaluating the measurability of measured variables by SMA elements. Furthermore, it investigates the technically relevant states of "blockade" and "activation" of electrically activated shape memory actuators. It develops and validates an algorithm which is able to detect a possible "blockade". Moreover, this work presents a hardware concept for a condition monitoring system of shape memory actuators.