压电直接驱动式伺服阀  

Servo-valve driven by piezoelectric ceramics

作　　者：董云峰[1] 曲兴田[2] 沈传亮[2] 董景石[2] 吴博达[2] 

机构地区：[1]吉林建筑工程学院土木工程系,长春130021 [2]吉林大学机械科学与工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2006年第5期678-680,共3页Journal of Jilin University:Engineering and Technology Edition

基　　金：'863'国家高技术研究发展计划项目(2001AA423270)

摘　　要：介绍了一种利用压电陶瓷直接驱动的压电伺服阀,其机械结构简单、抗干扰能力强,具有高于传统电磁式伺服阀的频宽和分辨率。应用有限元法分析了柔性铰链的结构特性,对压电叠堆的静、动态特性进行了理论分析,并制造了压电直接驱动式伺服阀样机,进行了静、动态性能测试。测试结果表明:该压电伺服阀可以满足现代精密高速控制系统的需要。A novel servo-valve directly driven by piezoelectric ceramics was introduced. The valve is characterized by broader frequency width and higher resolution than the traditional electromagnetic servovalve, simple mechanical structure, and strong anti-interference ability. The finite element method was used to analyze the structure characteristic of the flexible hinge. The static and dynamic characteristics of the piezoelectric stack were theoretically analyzed. The servo-valve prototype directly driven by piezoelectric stack was fabricated, and its static and dynamic characteristics were tested. The testing results show that the servovalve meets the demands of the high speed precise control system.

关 键 词：流体传动与控制 压电伺服阀 压电叠堆 柔性铰链 有限元法 

分 类 号：TH137.33[机械工程—机械制造及自动化]