Effect of Driving Signal and Temperature on Hysteresis of Magnetical Shape Memory Alloy-Based Actuator.

With the development of micromotion actuation technology, smart material-based actuators are more promising in micro/nanopositioning field. As a typical example of smart material-based actuators, magnetical shape memory alloy actuator has been applied in nanopositioning stages due to its extremely innovative properties such as high precision nanoscale positioning and large stroke. However, the inherent hysteresis nonlinearity of the magnetical shape memory alloy material affects the performance of the magnetical shape memory alloy-based actuator in the field of high precision positioning. The hysteresis characteristics of the magnetical shape memory alloybased actuator are related to many factors. This paper is devoted to study the effect of driving signal and external temperature on the displacement of the magnetical shape memory alloy-based actuator. Firstly, the structure and principle of the magnetical shape memory alloy-based actuator are introduced. Then the displacement curves of the magnetical shape memory alloy-based actuator are tested under different input frequencies, amplitudes, and environment temperatures. Finally, the hysteresis characteristics of the magnetical shape memory alloy-based actuator under different driving signals and environment temperatures are analyzed. [ABSTRACT FROM AUTHOR]