| 旋转直接驱动电液压力伺服阀稳定性分析 |
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| 引用本文： | 原佳阳,訚耀保,夏飞燕,方向.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. |
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| 作者姓名： | 原佳阳 訚耀保 夏飞燕 方向 |
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| 作者单位： | 同济大学 机械与能源工程学院，上海 200092,同济大学 机械与能源工程学院，上海 200092,同济大学 机械与能源工程学院，上海 200092,南京机电液压工程研究中心，江苏 南京 210061；航空机电系统综合航空科技重点实验室，江苏 南京 210061,同济大学 机械与能源工程学院，上海 200092 |
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| 基金项目： | 国家自然科学基金资助项目(51475332、51605333)，流体动力与机电系统国家重点实验室开放基金资助项目(GZKF-201518) |
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| 摘 要： | 针对最新研制的旋转直接驱动电液压力伺服阀(RDDPV)出现输出压力振荡问题,建立了数学模型和简化框图,得到了RDDPV稳定性判据,并提出了解决方案.RDDPV取消了传统压力伺服阀的机械和液压反馈,采用马达转角内闭环和输出压力外闭环的电反馈伺服控制.研究表明,当阀芯处于进回油口中间位置附近,稳态液动力表现为阀芯位移的正反馈作用,导致整阀机械液压部分刚度为负,稳定性差,此时,马达转角内闭环电反馈刚度对整阀稳定性至关重要.数值模拟和试验表明,增加马达转角电反馈系数,增加了伺服阀电反馈刚度,提高了伺服阀的稳定性.
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| 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 |
| 收稿时间： | 2017/1/4 0:00:00 |
| 修稿时间： | 2018/1/4 0:00:00 |
Stability Analysis of Rotary Direct Drive Electrohydraulic Pressure Control Servo Valve |
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| YUAN Jiayang,YIN Yaobao,LU Liang,FANG Xiang and XIA Feiyan.Stability Analysis of Rotary Direct Drive Electrohydraulic Pressure Control Servo Valve[J].Journal of Tongji University(Natural Science),2018,46(2):235-240. |
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| Authors: | YUAN Jiayang YIN Yaobao LU Liang FANG Xiang and XIA Feiyan |
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| Institution: | College of Mechanical Engineering, Tongji University, Shanghai 200092, China,College of Mechanical Engineering, Tongji University, Shanghai 200092, China,College of Mechanical Engineering, Tongji University, Shanghai 200092, China,Nanjing Mechatronic and Hydraulic Engineering Research Centre, Nanjing 210061, China; Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing 210061, China and College of Mechanical Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Aimed at the problem that the output pressure of newly developed rotary direct drive electrohydraulic pressure control 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. |
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| Keywords: | Electrohydraulic pressure servo valve Rotate Direct Drive Stability Nonlinear Mathematical Model Steady State Flow Forces |
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