Based on the special property of magnetic fluid ( mf ) , we fill the magnetic fluid into the working clearances of the servo valve torque motor . one side , the magnetized magnetic fluid can exert a damping torque on the torque motor armature and reduce vibration of the armature ; on the other side , it can improve the magnetic circuit efficiency of the torque motor because of the magnetic fluid ’ s larger magnetic permeability 基于磁流体所具有的特殊性质,将磁流体添加到伺服阀力矩马达的工作间隙中,一方面磁流体被磁化后可增大衔铁的阻尼力,减少振动;另一方面由于力矩马达气隙中磁导率的提高,使气隙中的磁通量增大,力矩马达的磁路效率和输出扭矩将增大,因此可以提高力矩马达的固有频率和伺服阀的响应速度。
If your elbows and upper arms are not connected to your torso , the rein contact will enter your body at the shoulder level , which allows the horse to use the leverage of your torso against you , e . g . by rooting against the bit and pushing his croup up , which renders your seat and rein aids completely ineffective 如果骑手肘部和上臂不能和踝联系，那么缰联系只能到你的肩膀，这样马就会利用你的踝的杠杆左右来对抗，马匹对抗衔铁，抬高尻部，从而导致你的骑坐和缰扶助完全失去效果。
However , by comparison with flap nozzle servo valve which has been used widely and popularly by now , the torque motor of jet pipe servo valve has a larger rotary inertia . this causes low natural frequency of servo valve , and thus the response speed of jet pipe servo valve is slow . moreover , the jet pipe of servo valve has large flexibility , and it is easy to excite oscillations and noise in the valve , which is named self - excited oscillations and noise 然而与目前普遍使用的喷嘴挡板伺服阀相比,射流管伺服阀的衔铁组件转动惯量大,导致力矩马达部分固有频率低,从而响应速度慢,此外,射流管供油管柔性大,容易产生自激现象,这些缺点都使得射流管伺服阀的动态特性差,从而影响了它的工作性能。
