Description: Global navigation satellite systems have been revolutionising surveying, geodesy, navigation and other position/location sensitive disciplines. However, there are two intrinsic shortcomings in such satellite-based positioning systems: signal attenuation and dependence on the geometric distribution of the satellites. Consequently, the system performance can decrease significantly under some harsh observing conditions. To tackle this problem, some new concepts of positioning with the use of pseudo-satellites have been developed and tested. Pseudo-satellites, also called pseudolites, are ground-based transmitters that can be easily installed wherever they are needed. They therefore offer great flexibility in positioning and navigation applications. Although some initial experimental results are encouraging, there are still some challenging issues that need to be addressed. This paper reviews the historical pseudolite hardware developments and recent progress in pseudolite-based positioning, and discusses the current technical issues. Platform: |
Size: 757629 |
Author:angyangxiang |
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Description: Because of the poor observability of Inertial Navigation System on stationary base, the estimation
error of the azimuth will converge very slowly in initial alignment by means of Kalmari filtering, and making the
time initial alignment is longer. In this paper, a fast estimation method of the azimuth error is creatively proposed
for the initial alignment of INS on stationary base. On the basis of the the fast convergence of the leveling error,
the azimuth error can be directly calculated. By means of this fast initial alignment method, the time of initial
alignment is reduced greatly. The computer simulation results illustrate the efficiency of the method. Platform: |
Size: 188416 |
Author:huzhou |
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Description: 室内移动机器人定位与导航关键技术研究,新思路-Indoor mobile robot localization and navigation key technology research and new ideas Platform: |
Size: 391168 |
Author:苏朗朗 |
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Description: 该PDF论文为TimBailey所著，为其博士论文，详细介绍了EKFSLAM，FASTSLAM1.0，FASTSLAM2.0的相同点和不同点以及优劣。-This thesis addresses the issues of scale for practical implementations of simultaneous localisation
and mapping [SLAM] in extensive outdoor environments. Building an incremental
map while also using it for localisation is of prime importance for mobile robot navigation
but, until recently, has been confined to small-scale, mostly indoor, environments. The
critical problems for large-scale implementations are as follows. Platform: |
Size: 8739840 |
Author:xuyuhua |
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Description: 中文版室内外精品建筑效果图制作范例导航可以很好的帮助初学者入门和提高-Chinese version of indoor and outdoor fine examples of architectural renderings make navigation can be very helpful for beginners entry and improve the Platform: |
Size: 21903360 |
Author:rfc |
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Description: The field of radionavigation signals and systems has seen significant growth in recent years. Satellite systems are very efficient, but owing to their limited exposure and/or availability in some environments, they do not cover the whole spectrum of applications. Thus, many other positioning techniques are being developed.
Now, Global Positioning presents an overview of the strengths and weaknesses of various systems with a specific emphasis on those that are satellite-based. Beginning with a description of the evolution of positioning systems, the book provides detailed coverage of the three main Global Navigation Satellite System (GNSS) constellations, discusses how to cope with indoor positioning, defines development activities and commercial positioning, and proposes a vision for the future of the field. Platform: |
Size: 5280768 |
Author:anna |
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Description: 室内惯性导航小程序。
默认为GPS模式 通过转换模式 进入惯性导航 手机朝前用手平托 可以继续在sd卡上记录航迹 生成GPX文件 可以导入google earth查看记录的航迹 内部编写了计步器 较为准确 用以计算距离-Indoor inertial navigation procedures. Default forward hand Pinto can continue to record the track on the sd card to generate a GPX file can be imported google earth track internal view records prepared pedometer is more accurate for calculating the distance phone GPS mode conversion mode into the inertial navigation Platform: |
Size: 192512 |
Author:kevin |
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Description: 迅速壁障前进，分为三种情况讨论，可以快速简单的解决壁障问题-Obstacle avoidance is one of the most challenging problems for the topic of UAV indoor navigation. In
this paper, an indoor obstacle avoidance strategy based on Scanning Laser Range Finder (SLRF) is developed, so
that high-level flight commands and flight paths can be generated for an unmanned coaxial rotorcraft in real time.
The developed strategy comprises three flight modes including hovering turn, forward flight and gate exploration.
During flight, the UAV can switch from one mode to another in the presence of obstacles according to the analysis
of SLRF measurements. Both simulations and real experiments have been conducted to validate the proposed
strategy. The test results have successfully demonstrated that the method is feasible and effective. Platform: |
Size: 68608 |
Author:baizhijun |
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Description: This a C# version of scenelib written by Anderdson-This is a C# version of scenelib written by Anderdson,based on indoor navigation Platform: |
Size: 41984 |
Author:zxh |
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Description: 室内定位系统的源代码，特别的地方是系统采用多种方式融定位i，其中Wifi RSSI+两种定位算法，同时还采用了多种传感器，脚步自动计算等手段进行惯性定位，很有启发。-The source code is an implementation for Indoor navigation system. This interested things are this navigation system used two different kinds of location methods, wifi RSSI location and Inertial location method. Platform: |
Size: 3021824 |
Author:zhang yu |
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Description: 三维复杂运动模式航迹推算惯性导航室内定位-Indoor positioning of the inertial navigation system for 3D complex motion model Platform: |
Size: 1570816 |
Author:luoyu |
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Description: 关于增强现实AR方面室内导航的文章，这是AR的发展场景之一。-On augmented reality AR indoor navigation of articles, this one is the development of AR. Platform: |
Size: 792576 |
Author:sdragon lee |
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Description: 室内定位技术综述，很全。涵盖了摄像机/红外/超声/UWB等等技术的对比，给出了每种技术的定位精度和范围，非常具有参考价值。-In the age of automation the ability to navigate persons and devices in indoor environments has
become increasingly important for a rising number of applications. With the emergence of global
satellite positioning systems, the performance of outdoor positioning has become excellent, but
many mass market applications require seamless positioning capabilities in all environments.
Therefore indoor positioning has become a focus of research and development during the past
decade.
It has by now become apparent that there is no overall solution based on a single technology,
such as that provided outdoors by satellite‐based navigation. We are still far away from
achieving cheap provision of global indoor positioning with an accuracy of 1 meter. Current
systems require dedicated local infrastructure and customized mobile units. As a result, the
requirements for every application must be analyzed separately to provide an indiv Platform: |
Size: 3549184 |
Author:boa_plaust |
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Description: 针对小型无人机在无卫星导航信号条件下的导航问题, 结合光流及地标定位设计了使用摄像头、惯性测量器件、超声测距仪等传感器融合的无人机室内导航方法. 文章使用补偿角速率的光流微分法计算帧间像素点小位移, 并用前后误差算法提取精度较高的点, 避免像素点跟踪错误, 提高了光流测速的精度 对得到的光流场用均值漂移算法进行寻优, 得到光流场直方图峰值, 以此计算光流速度. 本文提出了无累积误差的连续地标定位算法, 实时测量无人机位置. 通过多速率卡尔曼滤波器对观测周期不一致的位置、速度信息进行最优估计. 在搭建的八旋翼无人机平台上试验, 将位置与速度测量结果分别与激光和PX4FLOW数据对比, 结果表明该导航方法可以有效抑制定位跳变与光流测量噪声误差, 给出精确的位置与速度估计.
-Problems for the Navigation satellite navigation signals in the absence of conditions, and in conjunction with optical flow landmark UAV design indoor navigation positioning method using the camera, inertial measurement device, an ultrasonic range finder sensor fusion article using the compensation angle computing optical flow rate of the inter-pixel differentiation small displacements, and extracted with high precision before and after the point of error algorithm, to avoid the tracking error pixel, improve the accuracy of optical flow speed optical flow field obtained for the mean shift algorithm optimization, the histogram peak optical flow, in order to calculate the optical flow velocity. in this paper, the landmark location algorithm continuously accumulated error is measured in real time the position of the UAV by multirate Kalman filter observation period inconsistent positions , optimal estimation speed information. tested on eight rotor UAV platform structures, the position a Platform: |
Size: 882688 |
Author:lou tayzan |
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Description: 基于Android的室内导航定位系统设计与实现，
android开发，Java语言(design and implementation of indoor navigation and positioning system based on Android) Platform: |
Size: 10749952 |
Author:刘建勋 |
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