基于反馈线性化的高压大流量气动阀阀芯位置伺服控制研究  

Spool Position Servo Control Based on Feedback Linearization for the High-pressure and Large-flow-rate Pneumatic Valve

作　　者：杜经民[1] 肖海金 高隆隆[1] 李宝仁[1] 

机构地区：[1]华中科技大学FESTO气动技术中心,湖北武汉430074

出　　处：《液压与气动》2014年第5期66-70,共5页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金资助项目(50975102)

摘　　要：某高压大流量气动阀采用两级控制方式,先导级为高压电-气伺服阀,功率级为大流量气控滑阀,功率级滑阀阀芯位置控制性能受气源压力变化影响较大,要解决气源压力变化对功率级阀芯位置稳态控制性能的非线性影响,为此建立了阀芯动态数学模型,设计了基于反馈线性化方法的控制策略,对其控制特性进行了仿真研究。仿真结果表明,该控制方法减小了气源压力变化对阀芯位置稳态控制性能的影响,使不同气源压力对应响应时间及超调量一致性较高,稳态控制精度较高,为进一步研究高压大流量气动阀奠定了良好的基础。The high-pressure and large-flow-rate pneumatic valve is a two-stage control valve.Its pilot stage is a high-pressure electro-pneumatic servo valve,and the power stage is a gas control spool valve.The control performance of the spool position is affected by the variation of the supply pressure.The nonlinear effect of the variation of the supply pressure for the power-stage spool stable characteristic is solved in this paper.The dynamic mathematical model of the high-pressure and large-flow-rate is presented.The control strategy based on feedback linearization is proposed.The control performance of the spool position is investigated by numerical simulation.The simulation results show that the nonlinear effect of supply pressure on the power-stage spool position stable characteristic is reduced based on the proposed control strategy.The consistency of response time and overshoot with different supply pressures is high,and the stable control precision is high.The study provides the important basis for the further study of the high-pressure and large-flow-rate pneumatic valve.

关 键 词：高压气动阀 位置伺服控制 反馈线性化 仿真研究 

分 类 号：TH138.5[机械工程—机械制造及自动化]