导航系统

Moreover, the positioning information from the simplified IMU was comprehensive, and the positioning accuracy was high.

仿真结果表明，该简易IMU能够全天候地对列车进行连续可靠的自主导航定位，导航信息全面且定位精度较高，并显著地降低系统的成本、复杂性和计算量。

Inertial integrated navigation system is the development emphasis of modern navigation technology.

惯性导航组合系统是现代导航技术的发展重点。

With the breakthrough of aviation technology, international civil aviation organization put forward the communication, navigation and surveillance system based on performances. It is composed of required communication performance, required navigation performance and required surveillance performance.

随着航空技术的突破性进展，国际民航组织提出了基于性能的通信导航监视系统，其由所需通信性能、所需导航性能和所需监视性能组成。

In recent years, with the development of the micro-electronics technique, the price of GPS receiver have been greatly falling , and as a result of the United States closing SA to stop limiting the public position accuracy of GPS , the GPS positioning accuracy have improved greatly in public field. All this consumedly promote the development of GPS in public field, and especially in the vehicle navigation field , GPS shows its superiorly navigation performance.

近年来随着微电子技术的发展使得GPS接收机的价格大幅度下降，同时美国提前关闭SA停止对民间用户精度的限制使得GPS民用定位精度有了很大的提高，这大大促进了GPS在民用领域的发展，尤其是在车辆导航领域，GPS系统充分展示了它那优越的导航性能。

More than 5,000 people are employed by DFS all over Germany. They work at 17 control towers at German airports and six radar control centers as well as the Air Navigation Services Academy in Langen/Hesse and in the headquarters in Offenbach. DFS also has 40 years experience in the planning, development, implementation and operation of air navigation services systems and facilities. DFS Consulting draws upon this knowledge to support and advise its customers.

DFS在德国雇佣85000多名员工，并在德国机场设有17个塔台，6个雷达控制中心，连同在Langen/Hesse的航空导航服务学院和奥芬巴克总部工作，他们在航空导航服务系统和设施的规划、设计、开展、落实、操作方面已有40年的丰富经验，DFS正用这方面的知识为客户们提供顾问服务。

In this paper,we analyze the key techniques for the service precision of Global Navigation Satellite System such as time reference,time synchronization,satellite orbit determination,etc.

对影响导航定位系统定位精度的各种因素进行了分析。研究了影响导航定位精度的关键技术问题，如时间基准、时间同步和卫星定轨等。

Sicong officials said the system includes GPS, tactical air navigation and radio compass navigation.

Sicong人员说该系统包括GPS，战术空中导航和无线电罗盘导航。

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。

Global navigation satellite system is the trend of development and application of CNS/ ATMtechnology in civil aviation.

全球导航卫星系统是当今民航导航技术发展的应用趋势。

The major issues with GPS, namely 2 feet vertical guidance accuracy near the runway threshold and the integrity of the system has not been able to match historical ICAO standards and practices.

gps主要的问题是，跑到末端的垂直导航精确度是2英尺，系统的完整性（就是没有人为因素可以增加导航误差。。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。