同济大学学报（自然科学版）2018，Vol.46Issue(2)：235-240,6.DOI:10.11908/j.issn.0253-374x.2018.02.014
旋转直接驱动电液压力伺服阀稳定性分析
Stability Analysis of Rotary Direct Drive Electrohydraulic Pressure Control Servo Valve
摘要
Abstract
Aimed at the problem that the output pressure of newly developed rotary direct drive electrohydraulic pressurecontrol servo valve (RDDPV) was oscillating,the mathematical model and block diagram of RDDPV were established,and the stability criteria was obtained.In RDDPV,the electrical feedback of motor rotational angle and output pressure were used instead of traditional mechanical or hydraulic feedback.When the spool valve near the middle position between inlet and outlet port,steady state flow forces provided the positive feedback on spool motion,which led to a negative stiffness of mechanical and hydraulic parts,and the stability of RDDPV was poor.In order to improve the stability of RDDPV,the electrical feedback stiffness of the servo valve was improved by increasing the electrical feedback coefficient of motor rotational angle.Numerical simulation and experiment results show that the stability of RDDPV can be effectively improved by increasing the electrical feedback coefficient of motor rotational angle.关键词
电液压力伺服阀/旋转直接驱动/稳定性/非线性数学模型/稳态液动力Key words
electrohydraulic pressure servo valve/rotate direct drive/stability/nonlinear mathematical model/steady state flow force分类
机械制造引用本文复制引用
原佳阳,訚耀保,陆亮,方向,夏飞燕..旋转直接驱动电液压力伺服阀稳定性分析[J].同济大学学报（自然科学版）,2018,46(2):235-240,6.基金项目
国家自然科学基金(51475332 （）
51605333) （）
流体动力与机电系统国家重点实验室开放基金(GZKF-201518) （GZKF-201518）
