Shape memory alloys (SMAs) are smart materials that change their crystalline structures when subjected to heat or tension, resulting in a macroscopic deformation. When applied actuators, SMAs present remarkable load–weight ratio and flexibility, making them suitable for diverse applications. However, challenges such as energy consumption, nonlinear control, low displacement must be considered. ...

Shape memory alloy (SMA) has been utilized as the material of smart actuators due to miniaturization and lightweight. However, nonlinearity hysteresis SMA seriously affect precise control. In this article, a novel disturbance compensation-based adaptive control scheme is developed improve performance actuator system. Firstly, nominal model constructed based on physical process. Next, an estimat...

This paper presents the results from an experimental study on the actuation response of composite laminates containing Shape-Memory Alloy (SMA) actuators. Unidirectional glassfibre reinforced epoxide laminates were constructed containing Ni-Ti SMA actuators orientated parallel to the glass-fibre direction. The volume fraction of actuator was varied in the range 0 to 2.5 ~ 0 1 % . These laminate...

The nickel-titanium (Ni-Ti) alloys used in endodontics contain 56% Ni and 44% Ti. The 2 unique features related to clinical dentistry (i.e., shape memory effect and superelasticity) are due to the transition from austenite to martensite in Ni-Ti alloy. When a superelastic Ni-Ti alloy undergoes a low tensile loading, normal elastic behavior occurs. In fact, at higher tensile loads, the elastic s...