摘要
针对矢量喷管控制系统在故障状态回中的需求,在液压系统作动器设计中引入回中小孔,设计了具有自动回中功能的出口面积调节作动系统。该系统的自动回中功能不需控制系统控制,也不需提供外力即可实现作动器的自动回中。给出了自动回中功能的工作原理,并对系统的工作原理和零组件特性进行了理论分析;根据实际所应用的面积调节系统建立了液压系统的AMESim仿真模型,利用不同工作模态下转换阀和作动器等液压元件的仿真参数对模型参数进行了优化;将有回中小孔系统和无回中小孔系统的数字仿真结果进行了对比,并分析了影响回中位置的因素。仿真结果证明了引入回中小孔的有效性,并且回中后位置精度满足使用要求,运动平稳,在零位附近没有显著震荡现象;表明了回中小孔与活塞之间的开口度越大,回中时间越长,且回中位置误差越大;进油口的孔径越大,回中时间越快,但回中误差也相应变大。同时,数字仿真给出了回中小孔的具体设计参数,对工程研制具有一定的指导意义。
In order to meet the demand of the control system of the vector nozzle in the fault state,the actuator design of the hydraulic system is introduced in the middle hole.The automatic reversing function of the system does not need to be controlled by the system,nor does it need to provide external force to realize the automatic reversing of the actuator.In this paper,the working principle of the auto-centering function is given,and the working principle and characteristics of the system are analyzed theoretically.According to the practical area adjustment system,the AMESim simulation model of the hydraulic system is established.The model parameters are optimized by using the simulation parameters of hydraulic components such as the change-over valve and actuator in different working modes;the digital simulation results of the middle-hole system and the no middle-hole system are compared;the factors are analyzed in affecting the location of the middle-hole system.The simulation results prove the effectiveness of the introduction of the middle-hole system.The accuracy of the position meets the requirements of,the middle-hole system moves smoothly,and there is no significant oscillation around the center position.The results show that the greater the opening between the hole and the piston,the longer the recovery time,and the larger the position error.The larger the diameter of the inlet hole,the faster the recovery time.At the same time,the specific design parameters of the back-in-mid hole are given by the digital simulation,which has certain guiding significance for engineering research and development.
作者
牛宝锋
袁杰
逄洪军
NIU Bao-feng;YUAN Jie;PANG Hong-jun(Aviation Equipment Rch Icch Institute,AVIC Qingan Group Co.,Ltd.,Xi'an,Shaanxi 710077)
出处
《液压与气动》
北大核心
2019年第10期64-70,共7页
Chinese Hydraulics & Pneumatics
