Friction compensation for a pneumatic proportional valve based on dither effect

被引：0

作者：

Xie, Yu-Dong ^{[1
]}

Liu, Yan-Jun ^{[1
]}

Wang, Yong ^{[1
]}

机构：

[1] School of Mechanical Engineering, Shandong University, Jinan 250061, China

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2008年 / 27卷 / 02期

关键词：

Friction - Machine vibrations - Pneumatics - Signal processing - Time delay;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The friction of a pneumatic proportional valve is the major reason resulting in the valve dead zone. The relation between the valve friction and the spool radial unbalanced force is analyzed, the friction compensation mechanism with high-frequency low-amplitude dither signals acting on the valve is discussed based on vibrational effects, and the friction compensator is designed by use of VC + + and LabVIEW. Experimental results show that compensation is obtained by adding dither signals to the control signal to keep the spool vibrating persistently, the proportional valve friction is obviously reduced, the system crawl disappears, and the time delay is shortened. The proposed friction compensation method is shown to be valuable in engineering.

引用

页码：107 / 109