中文摘要：

针对某水下装置对高压、大流量压缩空气的控制要求，对其关键元件高压大流量气动电磁换向阀的原理和动态特性进行了理论分析和仿真研究．提出采用先导式结构，以气动力作为高压大流量截止式主阀阀芯驱动力．通过对主阀启闭物理过程的分析，结合气体动力学，建立了基于高压气动电磁换向阀启闭动态过程的非线性数学模型，在此基础上进行了仿真研究，分析了在启闭过程中气控腔的压力变化过程，并探讨了气控腔作用面积、主阀复位弹簧刚度对主阀动态特性的影响．

英文摘要：

The high-pressure and large flow rate pneumatic solenoid valve is an important component for underwater control devices. Thus its mechanism and dynamic property were investigated by means of theoretical analysis and digital simulation. A two-stage valve was designed to meet the requirement for poppet valve＇s large driving force. The main-stage poppet valve was actuated by pneumatic force controlled by a pilot solenoid valve. The mathematical model was given based on the analyzing the dy- namic process of main-stage valve during switch on-off operation. The simulation was applied to inves- tigate pressure process of changes, and discuss the influence on dynamic characteristics of the valve as altering area of control chamber and spring stiffness. The result is useful for design and manufacture the valves.