A novel position controller for an electro-optical tracking system is designed based on Internal Model control (IMC) principle and characteristic of disturbance and reference input for system.
根据内模控制原理及光电跟踪系统参考输入及扰动输入特性，设计了一种新型位置控制器。
A simple inertial or Doppler navigation has a common defect that position errors are always increasing with flight time or distance, therefore an external reference system is necessary.
纯惯性导航或多普勒导航的一个共同缺点是：一般都具有随时问或距离增长的位置误差，这就需要有一个外基准系统。
The system comprises a user interface for designating a reference plane, wherein the user interface provides a safe view position option and a restore reference plane option.
该系统包括用于指定参考平面的用户接口，其中该用户接口提供安全视图位置选项和恢复参考平面选项。
To improve the accuracy and reduce the setting time for the initial alignment of marine attitude heading reference system(AHRS) under motion, a method of two-position alignment was presented.
为提高船用航姿系统的对准精度和对准速度，提出了摇摆条件下的两位置对准方案。
There are two types of position control techniques being referred to as reference-pulse and sampled-data currently used in CNC system.
CNC系统目前有两种基本的位置控制方法：基准脉冲技术和采样数据技术。
In the strength analysis of the pumping jack of a pumping unit, it is very difficult to determine the reference node position under global coordinate system.
在抽油机支架强度分析中， 在全局坐标系下确定主惯性平面方位的参考节点的位置非常困难。
In the strength analysis of the pumping jack of a pumping unit, it is very difficult to determine the reference node position under global coordinate system.
在抽油机支架强度分析中， 在全局坐标系下确定主惯性平面方位的参考节点的位置非常困难。
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