具有压力补偿器的比例流量阀开度控制算法研究  

Study on Opening Control Algorithm for Proportional Valve with Pressure Compensators

作　　者：刘国平[1] 于见雨[1] 胡瑢华[1] 夏五星[1] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031

出　　处：《机床与液压》2012年第18期79-81,共3页Machine Tool & Hydraulics

摘　　要：比例流量阀的流量控制,其实质是对阀口开度的精确控制。对具有压力补偿器的比例流量阀建立稳态工况下的力学模型并进行实验分析,结果证明:电磁力需在两个特定阶段产生幅度较大的跳变,常规PID算法不能满足电磁力跳变要求。设计了微分先行PID算法,实验结果证明:该算法能够很好地满足电磁力跳变的要求,实现了阀芯设定开度与实际开度间良好的线性关系。Flow control of proportional valve is precise control of opening in essence. The mechanical model of proportional valve with pressure compensators under steady-state condition was established, and experimental verification was done. The results prove that electromagnetic force needs two mutations. So normal PID control can＇t fulfill the requirement. The algorithm of differential first PID was designed. It is proved that this algorithm can fulfill the mutation of electromagnetic force requirement. Good linear relationship be- tween setting opening and actual opening is achieved.

关 键 词：比例阀 压力补偿器 开度控制 电磁力跳变 微分先行PID算法 

分 类 号：TH137.522[机械工程—机械制造及自动化]