Advantages of geodesic coordinate system and its application to exact positioning of large cities 测地坐标系的优良性质及其在大城市精密定位中的应用
Design and simulation of the control system of precision positioning table driven by voice coil actuator 基于音圈电机精密定位平台的控制系统设计与仿真
At the same time , the technology about the linear motor is widely used in the precise location field 而直线驱动技术在精密定位领域中也得到了广泛的应用。
Control over high alignment accuracy and high speed of a precision alignment system based on laser moire signals 基于激光莫尔信号精密定位装置的高速高精度定位控制
In this paper , i emphasize the key technology in the aircraft ' s real - time positioning - the method to fix the integer ambiguity of gps carrier phase 本文着重研究机载gps精密定位系统的关键技术? ?确定载波相位整周模糊度的方法。
As one of the most important instrument for manufactory of microchip , the study of high accuracy locating system have become more and more popular 高精密定位技术是现代芯片制造业的重要手段之一，对其开展研究具有重要的实际意义。
After the contrast between performance and cost , the maglev precision stage with applying v - shaped symmetry structure is ascertained for the experiment model in the end 通过性价分析对比，最终确定磁悬浮精密定位平台采用v型对称导轨结构形式。
Applying magnetic levitation technology , the stage is suspended on the trail of inverse " f " , thus the wear and tear is eliminated , linear motor non - contact drive makes precise position of stage 利用磁悬浮技术将工作台悬浮在倒f导轨上，消除了导轨的摩擦和磨损；直线电机无接触驱动实现了工作台的精密定位。
The dissertation derives from the project “ piezoelectric platform for precision positioning using charge - feedback and nonlinear control method ” supported by national natural science foundation of china ( authorized no . 10376043 ) 本课题来源于国家自然科学基金项目“电荷反馈式压电陶瓷精密定位及非线性控制技术” ( no : 10376043 ) 。
The result showed that the open - loop controller and pid controller can reach 0 . 17um and 0 . 01um positioning accuracy respectively . by add former feedback in the pid controller the response time of step input reduced form 1 . 2s to 0 . 3s 通过给pid控制器增加前馈环节，使定位时间从1 . 2s降低到0 . 3s ，有效地提高了系统进行精密定位的动态性能。
