| High-speed on/off valve is the key actuator component for digital valve control system. It's a large potential to be applied in machine control, airplane control, and control of defense product etc. widely. The Giant Magnetostrictive Material (GMM) is a new type of magneto/electro-mechanical energy conversion Smart Material (or Function Material). Due to its giant Magnetostrictive strain coefficient, high power density, high electromechanical coupling coefficient, and high response speed, this new kind of smart material is very suit to be a driver component for small high-speed on/off valve. This paper goes into the research and exploration of the key technology of Giant Magnetostrictive Actuator (GMA).In this paper, several typical actuator components for digital valve control system and three function materials' main performance have been compared. It showes up advantageous of the high-speed on/off valve which based on GMM (or GMA).The Giant Magnetostrictive phenomenon and its mechanism are discussed. The basic property of GMM is well understood and the system of GMA for the high-speed on/off valve driver is proposed. A GMA for high-speed on/off valve driver is designed, optimized, and manufactured. The driver is made up of a actuator and a micro-displacement amplifier. The testing results of the driver show the advantages of GMA and existent disadvantages need to be overcome.The paper has discussed methods that select and design the GMM rod parameter to optimize its performance compounding.Based on the electro-magnetic model, in this paper, the static and transient response of GMM driver has been simulated by linear and non-linear 2D FEM(Finite Element Method), some rules and suggestions are proposed to develop the GMM driver for next study.A new micro-displacement amplifier solution, which suits for this driver has been proposed, designed and manufactured.Performances of the GMM driver prototype are measured by the testing system which is created by us.
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