摘要
为研究偏导射流液压放大器内部结构与伺服阀动态性能的内在联系,分别建立力矩马达、偏导射流液压放大器、功率级液压放大器的解析数学模型。分析接收口的复杂流动情况,提出一种简化的前置级液动力计算方法。构造偏导射流伺服阀完整模型,揭示射流口宽度、射流盘厚度及喷射口宽度对伺服阀动态特性的作用机理。针对整阀动态特性的漂移问题,探究了偏导射流前置级流量增益的非线性变化规律及其对动态特性的影响规律。仿真和试验结果表明,该数学模型能够有效地复现实际伺服阀动态特性,可为偏导射流伺服阀的设计和优化提供理论基础。
The analytical mathematical models for torque motor,prestage and power stage hydraulic amplifiers are established to investigate the relationship between the internal structure of jet deflector hydraulic amplifier and the dynamic characteristics of servo valve. A simplified calculation method of prestage hydraulic force is presented by analyzing the complex flow of the receiving ports. On this basis,a complete model of jet deflector servo valve is constructed,and the mechanisms of action of jet orifice width,jet disk thickness and nozzle width on the dynamic characteristics of servo valve are presented. For the dynamic drift of the whole valve,the nonlinearity of prestage flow gain and its influence on the dynamic characteristics are presented. The simulated and experimental results show that the proposed model can effectively reproduce the actual dynamic characteristics of servo valve,and the analytical modeling method is reasonable,which provides a theoretical basis for the design and optimization of jet deflector servo valve.
作者
王书铭
左哲清
延皓
许玲玲
董立静
WANG Shu-mingl;ZUO Zhe-qing;YAN Hao;XU Ling-ling;DONG Li-jing(School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;Beijing Precision Electromechanical Control Equipment Research Institute, Beijiug 100076, China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2018年第3期598-607,共10页
Acta Armamentarii
基金
国家国际科技合作专项项目(2012DFG71490)
中央高校基本科研业务专项项目(2015JBC022)
关键词
伺服阀
前置级
偏导射流
数学模型
动态特性
servo valve
prestage
jet deflector
mathematical model
dynamic characteristic
