考虑电涡流效应的射流管伺服阀建模及频率特性

针对射流管伺服阀在电-磁-力-位移转换过程中的响应滞后问题,建立了考虑电涡流效应的力矩电动机数学模型,获取了力矩电动机的频率特性。以某型射流管伺服阀为例,建立了考虑电涡流效应的射流管伺服阀数学模型,得到了主要性能参数对伺服阀频率特性的影响规律。结果表明:气隙长度、气隙磁导率的增加以及气隙有效面积的减小会导致伺服阀响应变慢,控制线圈匝数不影响伺服阀的频率特性,导磁材料电导率的减小能提高伺服阀的响应速度。对伺服阀进行试验研究,理论值和试验值之间的差值约为5%,验证了所建模型的正确性和有效性。

Modeling and frequency characteristics of jet-pipe servo valve considering eddy current effect

Considering the problem of response lag of jet pipe servo valve in the process of electric-magnetic-force-displacement conversion, a mathematical model of torque motor considering eddy current effect was established, and the dynamic characteristics of torque motor were obtained. Taking a certain type of jet tube flow servo valve as an example, a mathematical model of jet pipe servo valve considering the eddy current effect was established. The influence of main parameters on the frequency characteristics of the servo valve was obtained. Among them, the increase of air gap length, air gap magnetic permeability, and decrease of air gap effective area caused the servo valve to respond slowly, the number of control coil turns did not affect the frequency characteristics of the servo valve; decreasing the conductivity of the magnetically conductive material can increase the response speed of the servo valve. The servo valve was tested, the difference between the theoretical value and the test value was about 5%, verifying the correctness and effectiveness of this model.