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相关概念视频

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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Errors in Global Positioning System01:26

Errors in Global Positioning System

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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
32

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节点选择和路径优化用于通过无人机通过被动目标定位.

Xiaoyou Xing1, Zhiwen Zhong1, Xueting Li1

  • 1School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China.

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|February 13, 2025
PubMed
概括
此摘要是机器生成的。

这项研究优化了无人飞行器 (UAV) 网络,以实现被动目标定位. 它通过使用Cramer-Rao下界 (CRLB) 共同解决节点选择和路径优化,以提高准确性和效率.

关键词:
克拉默拉奥的下界 (CRLB)节点选择方法 节点选择方法粒子群算法 (PSO) 是一种粒子群算法.被动目标定位定位.路径优化方法的路径优化方法.无人驾驶飞行器 (UAV) 是一种无人驾驶飞行器.

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科学领域:

  • 机器人和控制系统 机器人和控制系统
  • 信号处理和通信 信号处理和通信
  • 航空航天工程 航空航天工程

背景情况:

  • 被动目标定位性能受到无人驾驶飞行器 (UAV) 的空间配置的影响.
  • 现有的方法经常在大型无人机网络中同时优化资源利用和本地化准确性方面扎.

研究的目的:

  • 在大型被动目标定位场景中提高资源利用效率和定位精度.
  • 共同研究和解决无人机网络的节点选择和路径优化问题.

主要方法:

  • 建立了一个被动目标定位模型,并引入了基于Chan的到达时间差异 (TDOA) 方法.
  • 导出了Chan-TDOA本地化Cramer-Rao下限 (CRLB),以制定节点选择和路径优化.
  • 开发了基于CRLB的节点选择和路径优化方法,包括禁飞区 (NFZ) 约束和利用粒子群优化 (PSO) 算法.

主要成果:

  • 提出了基于CRLB的节点选择策略,以有效地分组无人机以定位不同的目标.
  • 引入了基于CRLB的路径优化方法,该方法可以在遵守NFZ约束的情况下找到最佳的UAV配置.
  • 通过数值模拟证明,拟议的方法有效地提高了本地化准确性和资源利用率.

结论:

  • 节点选择和路径规划的联合优化显著提高了无人机网络中被动目标定位性能.
  • 拟议的基于CRLB的方法为在运营约束下有效和准确的目标跟踪提供了强大的框架.
  • 集成PSO加速了优化过程,使该解决方案适用于实时应用程序.