A novel piezoelectric type nozzle flapper hydroelectric servo valve was developed and its control method was researched.
提出了一种新型压电晶片型喷嘴挡板式电液伺服阀，并对其控制方法进行了研究。
2
Both the simulation and experimental results indicate that the dual flapper-nozzle servo valve has good flow-current characteristics and strong ability to control small flow rate.
理论分析和实验结果表明：双喷嘴挡板电液伺服阀具有良好的流量-电流比例特性和小负载流量的控制能力。
3
As a simple device without moving parts, vortex tube is composed of nozzle, vortex chamber, separating plate, controlvalve, hot-end and cold-end.