精度

In order to improve scan precision of the laser galvanometer scan system, especially when scan area is large, the reasons of graphic distortion are analyzed in this paper when the laser galvanometer scan system is running, and the whole bag of compensating tricks are put forward for every reason of corresponding graphic distortion.

针对如何提高振镜式激光扫描的扫描精度，特别是当扫描区域较大时的精度问题，文中展开了对振镜式激光扫描时图形畸变原因的分析，并对每一种误差产生的原因提出了校正补偿的办法。

The influence on motion precision by the gear-driven robot is discussed also,and measures to be taken are sugges...

针对机器人小车机械结构的齿轮传动，讨论对小车运动精度的影响，并提出提高小车运动精度的措施。

Aerotech positioning stages range from economical ball-screw and gear-driven linear and rotary stages to the highest performance direct-drive linear and rotary stages available; linear-motor-based Cartesian gantry systems; single and multi-axis air-bearing systems; and our complete range of nanopositioning stages.

再往上一层，Aerotech提供精密的运动平台，从精度为micron等级的线性马达平台，直驱马达平台，自精度等级为sub-micron的空气轴承平台均有提供，最近更推出ANT系列长行程奈米定位平台，提供丰富的产品线。

In existing technology, the nonnal way is adopting the four-bar linkage mechanism to imitate the arc or the linear movement. On the theoretical analysis, its movement precision can meet the requirement, while in the operation, because of the abrasion of bearings in gemel, which do much greater effect on movement than the former, its movement precision goes much beyond the theoretical value.

现有技术中一般是采用四连杆机构来仿弧线或直线运动，从理论上讲其运动精度是能够满足要求的，但在实际使用中，由于铰链点轴承的磨损（另外，装配时也预留了一定的轴承间隙），对运动轨迹产生的影响很大，其运动精度就大大超出理论值。

The accuracy of the measurements of the geocentric vector plays a key role in satellite navigation,but it is affected by the earth oblateness.

卫星利用紫外敏感器和星敏感器进行自主导航的方法中地心矢量的测量精度是影响导航精度的重要因素之一，而地心矢量的测量又受到地球扁率的影响。

Comparing the geodesic result and calculated result of one time,the deviation is 0.3%,and the standard deviation of the geodesic based on the result of statistic result is 5.29%.

最后对影响测量精度的因素进行了分析，通过前置滤波放大器降低了系统噪声，实验结果表明该方法对气流速度测量具有较高的精度。

With the example of calculating, It is proved to be a method of geodetic coordinate transformation with high accuracy as well as an appropriate computing velocity.

并且通过具体的算例，验证了这种转换算法具有较高的计算精度，并且具有一定的速度保证，能够应用于很多精度要求很高的领域。

Meanwhile, it was difficulty to apply angle conversion system to practical goniometry curcuit. The fast following-up conversion was improved and a high-precision dynamic goniometer system and a nonlinear high-speed following-up conversion mode based on inductosyn were proposed, which were applied to the serve system of some weapon. The results of the dynamic and static tracking indicated that the servo system with fewer errors could satisfy the requirements of the accuracy.

对快速跟踪型轴角转换方法进行了改进，提出了一种基于感应同步器的高精度动态测角系统及非线性快速跟踪型转换方式，并在某武器伺服系统中进行了应用，动静态跟踪结果表明该伺服系统的误差较小，满足精度的要求。

With the development of modern science, all kinds of pedestal platforms must be more precise . However, in the gradienter checking, the capability of the current optics quadrant instruments can not adapt to some of the pedestal platforms entirely, especially to some pedestal platforms on the ships (such as: naval ships).

随着现代科技的发展，人们对于各种基座平台的水平度精度要求越来越高，而现有光学象限仪已不能完全满足基座平台水平度的检测，特别是一些舰船上的基座平台，对于水平度精度的要求很高。

Gravity navigaton is based on gravity map. A method of constructing gravity map which can meet the demand of navigation is an important step taking account of the gravimeter and the precision of navigation.

重力导航是基于图的导航，根据导航重力仪和导航精度要求的具体情况，寻求能够保证导航定位精度的重力图构建方法是实现重力导航的重要步骤。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。