One thick necks ’ thickness measuring instrument with high precise and high efficiency is researched in this dissertation . one special flexible hinge gauge head is designed , differential solenoid inductance displacement sensor is chosen and modern micro - processing technology is used to meet the demand of measuring accuracy 本文通过设计一种专用柔性铰链测头,采用差动式螺管型电感位移传感器并结合现代微处理技术,对挠性接头细颈厚度的高精度高效率测量装置进行了研究。
The theoretic calculating method of the maximum and the minimum water level in the differential surge tank has been derived firstly . also the explicit method of calculating surges in the differential surge tank has been deduced firstly by use of thaler series expansion . the calculating method of section of the well and the effective impedance hole in the surge tank has been gived 根据差动式调压室的基本微分方程，首次推导出了差动式调压室涌浪幅值的理论计算公式；并同样利用泰勒级数展开方法推导出了差动式调压室水位波动的显式计算式；导出了差动式调压室大井面积和有效阻抗孔面积的计算方法。
Against the status of large scale ultra low frequency air spring vibration isolation platform , which is low damping and poor performance of low frequency , and after analyzing the existing key damping system , a new type differential electromagnetic damping system ( emds ) is developed in this article in order to reduce the resonance peak of the platform effectively and improve the low frequency performance of the platform 本文针对大型超低频空气弹簧隔振平台阻尼小、低频隔振性能较差的现状,在比较多种提供阻尼力的方法后,提出了用电磁力作为隔振平台的阻尼力,并开发研制了差动式电磁阻尼器系统。该系统可以有效降低隔振平台的谐振峰值,从而达到了提高隔振平台低频性能的目的。
