系统误差

ZqD;Z.BUB0 abstract:the present paper is mainly introduced gps the basic principle, the system composition, the technical characteristic, the error source and the application method and the sequence of operation, and carry on a lofting, the curve lofting as well as using gps in the project survey carry on the boundary point survey in the cadastration, carries on the precision analysis to the measurement result.

论文摘要：本论文主要介绍gps的基本原理、系统组成、技术特点、误差来源和使用方法及操作步骤，并利用gps在工程测量中进行点放样、曲线放样以及在地籍测量中进行界址点测量，对测量结果进行精度分析。

In this paper, the principles and the methods for correcting the nonlinear errors of the sensor system with a neural network are shown, and a novel simplified cerebella model articulation controller, which includes its model, algorithm and realized techniques, is proposed.

南京师范大学计算机技术开发部，南京，210097基金项目：本文研究得到江苏省科委应用基础项目基金资助。该文阐述了用神经网络校正传感系统非线性误差的原理和方法，提出了一种新颖的简化小脑模型神经网络及其模型、算法与实现技术。

Since there are two completely separate tracking systems there must be some collimation error or disturbance c.

由于存在两个完全分离的跟踪系统，所以一定有一些校准误差或干扰量c。

Daily maintenance of the system consumedly reduce the error margin of investigation.

本软件的日终维护大大减少了考勤中存在的误差，特别是数据备份功能，保证了系统数据的安全。

The cylindricity error separation and reconstruction method proposed in this paper was systematically verified.

利用自律验证法对本文提出的圆柱度误差分离及重构方法系统地进行了实验验证。

However, no method of assessing roundness and cylindricity, which not only meets the definitions of the national standards but also are the rapid and concision properties possessed, has been found.

本文着眼于数字分度头的虚拟仪器化设计，以及轴类零件的形状误差测量，结合对传统数字分度头的改造项目，提出了一种虚拟光栅数显系统的原理。

By means of declinate optical triangulation measuring instrument structure which is firstly proposed, the measured area and resolution of this measuring system are greatly increased, and the high accuracy non－contact measurement of the planeness of a large area plane is realized.

提出的虚拟精密基准的建模与误差补偿技术，解决了在非精密基准上实现精密测量的问题，研制的系统利用现有平台可实现对太阳帆板平面度的高精度测量。

In this paper the mathematical models and methods for GPS single-point positioning are studied systematically on the theory.All kinds of error correction formulas are studied,such as ironsphere correction,troposphere correction,relativistic effect correction,earth rotation correction ,earth tides correction ,satellites antenna phase center offset correction. GPS single-point positioning programs is coded with pseudoranges and broadcast ephemerides,phases and broadcast ephemerides,and phases and precise ephemerides.And a great amount of computation has been done using the data collected .The results are computed with the 24 hour pseudoranges observation data before and after the canceling of the SA.

本文从理论上系统地研究了GPS单点定位的数学模型和方法，研究了各项误差改正公式，例如电离层改正、对流层改正、相对论周期部分改正、地球旋转改正、地球固体潮改正、卫星天线相位中心偏差改正；编写了伪距与广播星历、相位和广播星历及相位和精密星历的定位程序，并使用有关数据进行了大量的计算工作。

So, the study in this dissertation focuses on some key points in theuncertainty treatment of mobile robot localization as follows: Combined with the multiple proprioceptive and exteroceptive sensors ofmobile robot MORCS-1, aimed at the drift error of fiber optic gyro as theproprioceptive sensor, the neural network using genetic algorithm as optimaltool is proposed to accomplish the modeling and calibration for temperaturedrift of fiber optic gyro, which can reduce the drift error to the standard outputat constant temperature; and aimed at the noisy disturbance of ranging datafrom the exteroceptive sensor laser scanner, a dynamic adaptive filter isintroduced through the analysis of neighboring ranging data in time and spatialcorrelation to realize the real-time and dynamic filter, which can validly filter the noisy disturbance to meet the requirement of the accurately real-timeobstacle detection in mobile robot navigation.

总结全文，在移动机器人定位的不确定性处理研究中，提出了一些具有一定创新性的方法：结合自行研制的移动机器人MORCS-1系统的多种内外部定位传感器，针对内部本体感受传感器光纤陀螺仪的漂移误差，提出采用基于遗传算法优化的神经网络来对光纤陀螺仪的温漂建模及校准，能够将其温漂变化控制在恒温条件下标准测试输出附近；针对外部环境感知传感器激光雷达测距数据中包含的噪声干扰，考虑移动机器人导航中激光雷达测距数据的时空关联性，提出采用动态自适应滤波技术进行预处理，从而可以有效滤除噪声干扰满足导航中障碍实时精确检测的要求。

This text carries on the experiment, modeling and compensation to the temperature error in the flexuous gyro and accelerometer of the strapdown inertial navigation system.

本文针对捷联惯性导航系统中挠性陀螺和加速度计的温度误差进行温度实验、建模及补偿。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。