Thermomechanical rotary actuator based on shape-memory property of alloy composed of equal parts of titanium and nickel. If alloy stretched while below transition temperature, it reverts to original length when heated above transition temperature. Two capstans on same shaft wrapped with shape-memory wires. As one wire heated, it contracts and stretches opposite wire. Wires heated in alternation so they switch shaft between two extreme angular positions; "on" and "off" positions of rotary valve.
Shape-Memory Wires Switch Rotary Actuator
NASA Tech Briefs ; 16 , 7
1992-07-01
Sonstige
Keine Angabe
Englisch
SOLUTIONS - Technology Focus: Sensors - Cylindrical Shape-Memory Rotary-Linear Actuator
Online Contents | 2002