Design and Testing of a Shape Memory Alloy Buoyancy Engine for Unmanned Underwater Vehicles

2015 ◽  
Author(s):  
Alexander J. Angilella ◽  
Farhan Gandhi ◽  
Timothy Miller
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Underwater Vehicles ◽  
Unmanned Underwater Vehicles ◽  
Design And Testing

Motion Principle and Experimental Research on a Swing Joint Differential Driven by Shape Memory Alloy

2013 ◽  
Vol 771 ◽  
pp. 203-208
Author(s):  
Yuan Gui Tang ◽  
Ai Qun Zhang
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Research ◽  
Structural Parameters ◽  
Underwater Vehicles ◽  
Thermodynamic Performance ◽  
Experimental Base ◽  
Driving Condition ◽  
Sma Actuator ◽  
Amphibious Robot

A kind of shape memory alloy (SMA) differential drive method and its experiment equipment can be used in swing joint of a micro amphibious robot is presented. According to its motion character, motion principle of the swing joint differential driven by SMA is analyzed. The basic thermodynamic performance of the SMA springs with different structural parameters is researched by experimentation. Aiming at the SMA differential actuator composed by SMA springs in different structural parameters, experimental research and analysis on the response ability of the SMA actuator is carried out in various driving condition and environment, which can be used to provide experimental base and data support for applying SMA drive technique in propulsive area of underwater vehicles.

Design and testing of an enhanced shape memory actuator elastically compensated by a bistable rocker arm

2012 ◽  
Vol 24 (6) ◽  
pp. 704-716 ◽  
Author(s):  
Giovanni Scirè Mammano ◽  
Eugenio Dragoni
Keyword(s):  
Fatigue Life ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Testing ◽  
Test Results ◽  
Shape Memory Alloy Actuator ◽  
Output Force ◽  
Theoretical Predictions ◽  
Constant Output ◽  
Design And Testing

This article presents the design, the prototype construction, and the experimental testing of a shape memory actuator implementing the concept of elastic compensation put forward in a previous publication by the authors. A two-shape memory alloy actuator, compensated by a spring-assisted bistable rocker arm, is designed theoretically to provide nearly constant output forces and then it is built and characterized experimentally under laboratory conditions. The test results closely agree with the theoretical predictions and show that for given output force, the compensated actuator produces net strokes from 2.5 to 22 times greater than a twin uncompensated actuator. The stroke improvement increases dramatically with the generated output force. Weaknesses of the compensated design are the heavier average stress sustained by the shape memory alloy springs, which could impair the fatigue life, and a higher response time.

Structure and mobility of martensite variant interfaces in a Cu-Zn-AI shape memory alloy

2003 ◽  
Vol 112 ◽  
pp. 519-522 ◽  
Author(s):  
W. Cai ◽  
J. X. Zhang ◽  
Y. F. Zheng ◽  
L. C. Zhao
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensite Variant
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