双喷嘴挡板伺服阀工作过程的数值模拟

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (15) : 109-114.

论文

双喷嘴挡板伺服阀工作过程的数值模拟

胡均平，李科军

作者信息 +

Numerical simulation of twin flapper-nozzle servo valve working process

HU Jun-ping, LI Ke-jun

Author information +

文章历史 +

摘要

为从理论上研究双喷嘴挡板伺服阀的工作性能，需对其建立较为精确的数学模型。针对电液伺服阀工作过程固有的机电液耦合特性，选择可统一处理多能域复杂系统的键合图法作为建模工具。根据衔铁、挡板组件和阀芯的运动规律，考虑喷嘴射流液动力等非线性因素，采用集中参数构建了系统的键合图模型，并推导出描述伺服阀工作过程内部能量供给、传递、转化和消耗的状态方程。结合某型伺服阀的相关参数，采用四阶Runge-Kutta法进行数值求解。数值模拟结果表明：伺服阀输入阶跃电流后，预测的负载流量阶跃响应的变化趋势能与试验结果较好吻合，并且模型能预测伺服阀系统内部状态变量的动态特性，为伺服阀结构参数优化研究和动态性能分析提供了理论依据。

Abstract

To investigate the working performance of twin flapper-nozzle servo valve in theory, the accurate mathematic model of servo valve needs to be established. In the view of electromechanical coupling characteristics of the servo valve, so the bond graph method was introduced with the advantage in modeling complex and dynamic multi-energy domains system. According to the geometric relationship between the armature, baffle component and the main valve, the bond graph model of the servo valve was obtained based on the working mechanism, the nozzle jet fluid power and other nonlinear factors were taken into consideration in the model, and the system state-equations describing energy input, transfer, translation and dissipation of the servo valve were deduced. Numerical simulation based on four order Runge-Kutta method was studied with parameters in the experiment. The results show that the trend of load flow rate step response can agree well with the experimental results, the system internal parameters response can be predicted by t-he model during the working process, and that this modeling method provides a theoretic-al basis for the optimum design and dynamic analysis of the servo valve.

导出引用

胡均平，李科军. 双喷嘴挡板伺服阀工作过程的数值模拟[J]. 振动与冲击, 2015, 34(15): 109-114

HU Jun-ping, LI Ke-jun. Numerical simulation of twin flapper-nozzle servo valve working process[J]. Journal of Vibration and Shock, 2015, 34(15): 109-114

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