Effect of sink flow on dual-valve electro-hydraulic excitation system
Effect of sink flow on dual-valve electro-hydraulic excitation system
复制标题
汇流对双阀电液励磁系统的影响
DOI：
10.21595/jve.2016.16589
复制
发表时间：
2016-05-01
影响因子：
1
通讯作者：
Ni, Jing
中科院分区：
文献类型：
--
作者：
Meng, Zhen;Wu, Chuan-yu;Ni, Jing
本研究的主要目的是研究新型双阀电液激励系统（EHES）的位移增益特性。相对于传统系统，双阀系统可以提高振幅范围，但振幅范围总是受到一些非线性因素的影响。为了分析这一问题，基于伯努利方程和经典电液伺服方程，建立了双阀电液伺服系统的非线性数学模型。然后，利用MATLAB/Simulink软件进行了数值模拟，并与实验结果进行了比较。仿真和实验结果表明，汇流主要影响双阀EHES的流动动力学特性。因此，双阀EHES只能在激励频率5 ~ 50hz范围内提高50% ~ 70%的排量，在指令值的20% ~ 100%范围内提高45% ~ 80%的排量幅值。
In this study, the main goal is to investigate the displacement gain characteristics of novel dual-valve Electro-Hydraulic Excitation system (EHES). Relative to conventional system, the dual-valve system can improve the amplitude range, but the range is always affected by some nonlinear factors. In order to analysis on the issue, a nonlinear mathematical model of dual-valve EHES is established based on Bernoulli and classical electro-hydraulic servo equation. Then, the results of numerical simulations by using of the MATLAB/Simulink software are compared with experimental results. Simulation and experimental results show that the sink flow mainly influences on the flow dynamic characteristics of dual-valve EHES. Because of that, dual-valve EHES only can improve 50 %-70 % of displacement within 5 to 50 Hz of excitation frequency and 45 %-80 % of displacement amplitude within 20 % to 100 % of command value.