One Directional Active Bending Mechanism Using Shape Memory Alloy Wire for Minimally Invasive Medicine and Feedback Control by Changing in Electrical Resistance of Wire

2015 ◽  
Vol 135 (10) ◽  
pp. 393-398 ◽  
Author(s):  
Takumi Kobayashi ◽  
Tadao Matsunaga ◽  
Yoichi Haga
Keyword(s):  
Feedback Control ◽  
Shape Memory Alloy ◽  
Minimally Invasive ◽  
Shape Memory ◽  
Electrical Resistance ◽  
Shape Memory Alloy Wire ◽  
Alloy Wire ◽  
Bending Mechanism

A novel variable-stiffness flexible manipulator actuated by shape memory alloy for minimally invasive surgery

2018 ◽  
Vol 232 (11) ◽  
pp. 1098-1110 ◽  
Author(s):  
Yanfei Cao ◽  
Feng Ju ◽  
Lei Zhang ◽  
Dongming Bai ◽  
Fei Qi ◽  
...  
Keyword(s):  
Minimally Invasive Surgery ◽  
Shape Memory Alloy ◽  
Minimally Invasive ◽  
Shape Memory ◽  
Invasive Surgery ◽  
Variable Stiffness ◽  
Flexible Manipulator ◽  
Phase Transformation Temperature ◽  
Shape Memory Alloy Wire ◽  
Alloy Wire

This article presents a novel variable-stiffness flexible manipulator for minimally invasive surgery. Each module of the proposed manipulator contains a variable-stiffness mechanism actuated by proactive deformation of shape memory alloy. Due to low driving current, apparent mechanical deformation, suitable phase transformation temperature and biocompatibility of shape memory alloy wire actuation, it is well suited for the manipulator applied in minimally invasive surgery, where variable stiffness is urgently required. In this article, the conceptual design, elastic modulus model, thermo-electric model, stiffness controlling method and finite element method simulation for a single module of the proposed variable-stiffness flexible manipulator are presented. Moreover, the memory shape setting experiment of shape memory alloy wire and fabrication of the single module are carried out. Finally, stiffness characterizations of the mechanism and the single module are studied separately, theoretically and experimentally.

Optimization of the orifice flow in shock absorbers using shape memory alloy wire

2000 ◽  
Author(s):  
Nik Abdullah Nik Mohamed ◽  
Ahmad K. Ariffin ◽  
Shahrir Abdullah ◽  
W. B. Ng
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Alloy Wire ◽  
Alloy Wire ◽  
Shock Absorbers ◽  
Orifice Flow
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