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Self-sensing Properties of Magnetic Shape Memory Alloy Actuator

Author: DingYu
Tutor: SunBaiQing
School: Shenyang University of Technology
Course: Power Electronics and Power Drives
Keywords: Self - sensing feature Controlled shape memory alloy Actuators Induced voltage
CLC: TG139.6
Type: Master's thesis
Year: 2010
Downloads: 73
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Abstract


With the in-depth study of smart materials , smart materials in the possibility of self-sensing actuator applications is growing. Controlled shape memory alloy (MSMA) is a new type of smart materials , it has a large deformation rate , easy to control , the advantages of the dynamic response speed and high power density and electromechanical energy conversion efficiency , a key material for a new generation of intelligent actuators and sensors . First, at the micro analysis of controlled shape memory alloy crystal structure and deformation mechanism , introduced at the macro and systematic analysis of the control characteristics of the controlled shape memory alloy and its application prospect of self - sensing feature , given MSMA the relationship between the deformation and temperature , magnetic field , and the pre- pressure for MSMA actuator provides a theoretical basis for the study of self - sensing feature . Secondly , in order to study the relationship between the magnetically controlled shape memory alloy mechanical shock under strain , force , temperature , magnetic field , designed to measure MSMA in the role of mechanical shock , temperature , strain , induced voltage test platform . The apparatus the MSMA material was placed in a magnetic circuit of the core and the permanent magnet , with pendulum generating vertical and the direction of the magnetic field of the mechanical impact . When a mechanical shock is applied on MSMA , the measuring material deformation, the magnetization of the material itself and the temperature. The intensity of magnetization of the material itself by measuring core outer induction coil voltage induced expression. The process of experimental measurement system , equipped with suitable sensors and sensing element for the detection of each analyte physical quantities . Finally , based on the experimental data obtained through the study of data processing analysis of self-induced properties of magnetically controlled shape memory alloy actuators . Experimental results show that the induced voltage and shape variables and impact of a linear relationship , which means that the induced voltage can reflect the impact force and deformation , which verifies the feasibility of applying controlled shape memory alloy actuators self- perception .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > The alloy learn with a variety of properties of alloys > Other special nature of the alloy > Shape Memory Alloys
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