摘要
为了研究轴向柱塞泵配流盘/缸体摩擦副的润滑机理,研制了微米级电液位置反馈控制系统.基于该控制系统的组成和工作原理,使用系统中的高精度电涡流微位移传感器对润滑膜厚度进行精密测量.采用比例-积分-微分(PID)控制算法对微米级的润滑膜厚度进行反馈控制,对微米级电液位置反馈控制系统进行了数学建模,并研究了整个电液位置反馈控制系统的动态特性.结果表明,随着V0/βe、Kce的适当减小,润滑膜厚度的振荡幅度减小.适当选取PID参数值可以使系统的振荡周期变短,响应速度加快.微位移传感器的测量误差小于1μm.该系统可以测量轴向柱塞泵配流盘/缸体摩擦副润滑膜厚度、承载力和泄漏流量.
To research the lubrication mechanism of port plate/cylinder block friction pair in axial piston pump, a micron electrohydraulic position feedback control system was developed. Based on the composition and working principle of the proposed control system, the thickness of lubricating film was precisely measured through the high accuracy electric eddy micro displacement sensors in the system, and the thickness of the micron dimension lubricating film was controlled with feedback proportionabintegral-differential （PID） algorithm. The mathematical model of the micron electrohydraulic displacement feedback control system was established, and the dynamic properties of the proposed system were simulated. The results show that the vibration amplitude of lubricating film decreases proportionally with the decreasing values of V0/βd and Kce, and that properly selected value of PID coefficient can accelerate the response speed of the proposed system and shorten the vibration period of the proposed system. The measurement error of the micro displacement sensors is less than 1μm. The proposed system can measure the film thickness, and support capability and leakage of port plate/cylinder block friction pair in axial piston pump.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第12期1936-1940,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"985工程"重点建设项目
国家"十五"科技攻关资助项目(2002BA208B04)
关键词
配流盘/缸体摩擦副
润滑特性
微位移传感器
反馈控制
port plate/cylinder block friction pair
lubrication characteristics
micro displacement sensor
feedback control
