Instruments and Control
VŠB-TU Ostrava, 6.5.2003
| Annotation of paper No. 4 |
|---|
| Title: | Uncommon actuators for robotics-Shape Memory Alloy |
| Author(s): | VAŠINA, Michal |
| Text: | The mechanical motion in SMA is caused by the changes of crystalline structure of SMA. In 1971 there was made the first really sophisticated machine - artifical heart. The most flexible and beneficial Shape Memory Alloy, that has been discovered so far, for engineering applications is an Nickel-Titanium (Ni-Ti) compound. When using the SMA in the practical applications, it is necessary to reckon with certain constraint conditions. By providing the current flow through the SMA drive we achieve the change of temperature thanks to its electrical resistance.The easiest variant of the control of SMA actuators is based on the principle of ON / OFF control. Continuous control of SMA actuators is relatively difficult ad its quality depends for example on the ability to create a suitable SMA model and its correct identification |