伺服比例阀非线性校正方法研究  

Approaches to Non-linearity Compensation of Servo Proportional Valve

作　　者：张辉[1] 刘江[2] 关广丰[3] 韩俊伟[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001 [2]中国船舶重工集团公司703研究所,黑龙江哈尔滨150001 [3]大连海事大学,辽宁大连116026

出　　处：《机床与液压》2010年第11期1-3,34,共4页Machine Tool & Hydraulics

基　　金：国家科技支撑计划(2006BAF01B12-03)资助项目

摘　　要：介绍了一种改善伺服比例阀零漂、死区与非线性特性的方法。应用键图理论对伺服阀阀口进行分析,得到阀口面积梯度的变化规律,分析导致伺服阀死区与非线性的原因,给出了由于阀口面积梯度比变化导致系统的非线性特性的直接关系。提出了应用内环积分的方法来调节零漂的方法和以反函数修正死区与非线性的校正方法。实践验证,这两种方法均能够明显提高伺服比例阀的性能,实际应用中取得了较好的效果,使系统整体的特性得到了提高,具有一定的实用价值。A method that can improve the zero drift,dead zone and nonlinear of servo proportional valve was presented.Bond graph theory was used to analyze the valve port of the servo valve and the area gradient change rules of the valve port were obtained,the cause of the dead zone and nonlinear of servo valve were caused by valve port area gradient ratio.Inner loop integrating element was used to adjust zero drift and inverse function correction method was used to modify dead zone and nonlinear of servo proportional valve.The test results show that these two methods can improve significantly the characteristic of servo proportional valve and improve the overall system characteristic,and a better effect in practice application is obtained.

关 键 词：键图仿真 零漂 死区 非线性 

分 类 号：TH137[机械工程—机械制造及自动化]