2D数字阀滞环颤振补偿技术研究  

Dither Compensation Technology for Hysteresis of 2D Digital Valve

作　　者：李胜[1] 阮健[1] 孟彬[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州310014

出　　处：《农业机械学报》2011年第3期208-212,218,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50975258);浙江大学流体传动与控制国家重点实验室资助项目(GZKF-2008005)

摘　　要：建立了2D数字阀的数学模型,对2D数字阀的由齿隙产生的滞环进行了研究和仿真分析,提出了在输入信号上叠加一高频颤振信号以减小甚至消除2D数字阀的滞环特性颤振补偿技术。利用专门的实验平台对所设计的样阀进行了实验研究。实验结果表明,采用颤振补偿技术后,当颤振幅值为25%、50%、100%齿隙量时,滞环宽度由2.2%分别降为1.7%、1.1%、0.5%。理论和实验结果均表明采用颤振技术在一定的频率和幅值的颤振信号作用下,可以减小或消除2D数字阀的滞环特性。The mathematical model of 2D digital valve was established and its hysteresis characteristics was first simulated and analyzed.In order to diminish and even eliminate hysteresis,a dither compensation technology which used high frequency dither signal to superimpose on input signal was proposed.Then the special test rig was built and experimental study was carried out.The experimental results revealed that when dither amplitude was 25%,50% and 100% of backlash magnitude respectively,the hysteresis width accordingly reduced from 2.2% to about 1.7%,1.1% and 0.5% of backlash magnitude respectively.It is finally concluded that the proposed dither compensation approach can diminish and even eliminate hysteresis of 2D digital valve effectively.

关 键 词：2D数字阀 颤振 滞环特性 齿隙 

分 类 号：TH137[机械工程—机械制造及自动化]