Jet pipe servo valve has a good prosperity in the field of aviation , aerospace , ship craft , electrohydraulic system control and so on because of the high resistance to contamination , high sensitivity , high safety and long life 射流管伺服阀以其抗污染能力强、灵敏度高、安全可靠、寿命长等独特优点而广泛应用在航空航天、船舶、电液系统控制等各行各业中。
Magnetic fluid shows higher saturation when it is exposed to magnetic field . in this paper , magnetic fluid is used to improve the dynamic performance of jet pipe servo valve by filling magnetic fluid in the working clearances of torque motor between armature and core 本文利用磁流体在外加磁场作用下,具有较大磁化强度的特点,提出了在力矩马达衔铁和铁芯的工作气隙中加入磁流体,利用磁流体来改善射流管伺服阀动态性能的方法。
At last , according to the experimental data of dynamic characteristics , mathematical models of jet pipe servo valve with magnetic fluid and without magnetic fluid which are used in the experiment are identified by using the method of system identification 最后依据动态特性实验数据,运用系统辨识方法辨识出实验使用的射流管伺服阀在未添加磁流体和添加磁流体两种情况下的实际数学模型,为以后进一步进行仿真、参数优化等研究打下了基础。
On one hand , it may exert damping on the armature of torque motor and overcome self - excitation of jet pipe . one the other hand , it may enlarge magnetic permeability of working clearances and improve magnetic circuit efficiency of torque motor to boost dynamic response speed of servo valve 一方面可增大力矩马达工作气隙部分产生的阻尼,从而可以抑制射流管的自激,另一方面又可增大工作气隙的导磁率,改善力矩马达部分的磁路效率,从而提高伺服阀的动态响应速度。