Universiti Teknologi Malaysia Institutional Repository

A multi-segmented shape memory alloy-based actuator system for endoscopic applications

Abdul Kadir, Muhammad Raihan and Dewi, Dyah Ekashanti Octorina and Jamaludin, Mohd. Najeb and Nafea, Marwan and Mohamed Ali, Mohamed Sultan (2019) A multi-segmented shape memory alloy-based actuator system for endoscopic applications. Sensors and Actuators, A: Physical, 296 . pp. 92-100. ISSN 0924-4247

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.sna.2019.06.056


This paper describes the design, fabrication and testing of a shape memory alloy based actuator system to provide three degrees of freedom bending with high flexibility and repeated use capability without any performance loss for minimally invasive surgery. The flexibility, long-term endurance and thermal characteristics of this system were studied. The system consisted of 3 segments, front, middle and back. Thermal simulations showed an increase in temperature of 1–2 °C at the segment nearest to the activated segment and a temperature increase of 1 °C at the segment furthest from the activated segment. Transformation strain simulations showed that the 8 mm width design has the lowest strain (2%). The average maximum bending angle was above 30° across most actuator segments but a reformation angle of only 50% of the maximum angle. The endurance test showed that all actuators can operate for 7000 actuation cycles with a standard deviation of 0.6154, 0.8293 and 0.0364 mm for sections A, B and C, respectively. The system was capable of high angle of bending across all segments and capable of continuous long-term use with little performance deviation. The system will allow surgeons to have more flexibility during surgery and thus enable reaching difficult regions in minimally invasive surgery.

Item Type:Article
Uncontrolled Keywords:actuator, endoscope, minimally-invasive surgery, shape memory alloy
Subjects:Q Science > QH Natural history > QH301 Biology
T Technology > TP Chemical technology
Divisions:Biosciences and Medical Engineering
ID Code:88976
Deposited By: Yanti Mohd Shah
Deposited On:26 Jan 2021 16:36
Last Modified:26 Jan 2021 16:36

Repository Staff Only: item control page