Research On Design Method Of Giant Magnetostrictive Actuator And Found On Test System

The research theme of this dissertation is the giant magnetostrictive micro-displacement actuator including its design, modeling and detecting and controlling system, which supported by national science foundation. This dissertation is consisted of six chapters. The mainly contents can be stated as follows:In chapter 1, the concept and the development situation of modern actuator are introduced and the conclusion that GMM , as a typical modern nature actuator, will be wildly used in the future are drawn. This chapter also includes the characteristics of giant magnetostrictive and the application situation of GMM and research status in this field. And finally, the research contents and the project background are introduced.In chapter 2, the principle and structure of GMM are introduced. The static and dynamic models are analyzed and the static displacement and force models are derived. The lump parameter electrical-mechanical dynamic model is built in which magnetic flux feedback is introduced to remove the distortion due to considering the loop inductance as a constant. The modeling theory and algorithm of non-liner character which is based on energy are showed and displace output character of GMM with typical Presisach Model is explained.In chapter 3, In view of the character of giant magnetostrictive material and designing demand of GMM, the general design theory and methods of GMM, especially the design of device which used to deduce the heat error of GMM , are systematically introduced. Then the design result of GMM is presented and a 2D-axil symmetry model is built. After analyzing the magnetic field of actuator using the finite element method , the distribution of magnetic field and the size of input current in loop are presented.In chapter 4, the principle and component of GMM driving and controlling system are introduced. The character and requirement of driving power supply of GMM is analyzed and a available continuous constant current power is designed. At the same time, the device and controlling software system that are used in this experiment are demonstrated in detail. In this software system, the data and drawing display model was programmed by MATLAB and C++ languages, which combined the advantages of MATLAB and C++ languages and produced great effect..In chapter 5, a test to GMM is taken, including static and dynamic test. The test result is analyzed in detail. The static characteristic test experiment is consisted of static-output displacement characteristic experiment, advanced press-output displacement characteristic experiment, static current-output strength characteristic experiment and hysteresis characteristic experiment. The dynamic characteristic experiment consisted of dynamic output displacement experiment influenced by magnetic field., output displacement experiment in the condition of alternating current driver, output strength experiment in the condition of alternating current driver. Meanwhile , a experiment to...