Key Technologies For Micro High-speed Switching Valve Drive

High speed on/off valve is key part of hydraulic control system, which will be widely used in machine tool control system, ship control system and weapon control system, etc. While the giant magnetostrictive material is a new type of magneto(electro)- mechanical energy conversion material. Due to its giant magnetostrictive strain, high power density, high electromechanical coupling coefficient, and high response speed, this new kind of functional material is suitable to be actuator of High speed on/off valve. Technologies of magnetostrictive actuator for high speed on/off value are researched in this paper.First, some kind hydraulic valves are discussed. Then the giant magnetostrictive phenomenon and its form mechanism are analyzed in the paper. The basic property of giant magnetostrictive material is well understood and the system of giant magnetostrictive actuator is proposed.A kind of micro-displacement amplifier mechanism is studied and a micro-displacement amplifier is designed and manufactured.A giant magnetostrictive actuator is studied, designed and manufactured.The mathematical model of the actuator is established. The model is useful for the research of actuator's control system.The experimental study of linear giant magnetostrictive actuator is carried on. The precision and stability are analyzed. And the reasons for the error are analyzed. Some measures are put forward to it in the paper.