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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

48
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...
48
Errors in Global Positioning System01:26

Errors in Global Positioning System

46
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,...
46
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

62
The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
62
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

59
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...
59
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

406
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
406
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

468
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
468

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相关实验视频

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A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat
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一种定位和导航方法,结合了多动作特征,死算和声学定位.

Suqing Yan1,2, Xiaoyue Xu2, Xiaonan Luo3

  • 1Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, China.

Sensors (Basel, Switzerland)
|December 23, 2023
PubMed
概括

这项研究引入了一种新的融合定位导航系统,它结合了声学和惯性辅助方法. 这种新的方法显著提高了本地化准确性和稳定性,克服了个别技术的局限性.

关键词:
拉索回归法 (Lasso Regression) 是一种回归法.死亡的计算死亡的计算.扩展的卡尔曼过器室内定位装置 室内定位装置步骤长度估计 步骤长度估计

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科学领域:

  • 导航系统 导航系统
  • 传感器融合式传感器
  • 地理学工程 工程地质学

背景情况:

  • 准确的位置信息对于商业和社会应用至关重要.
  • 声学定位提供了高精度,但有异常.
  • 惯性辅助定位 (IAP) 提供自主能力,但会积累错误.

研究的目的:

  • 开发一种新的定位导航系统,整合声学估计和行人死亡计算 (PDR).
  • 解决个别定位方法的局限性,即声系统中的异常和PDR中的错误积累.
  • 通过传感器融合和一个新的步骤长度模型来提高定位的准确性和稳定性.

主要方法:

  • 从运动数据中提取特征 (加速高峰到低谷幅度差异,步行频率,方差,平均值,高峰/低谷中位数).
  • 使用之前的步骤和当前加速数据进行步骤长度预测,并通过LASSO调整进行优化.
  • 通过混合CHAN-Taylor算法进行声学估计.
  • 使用扩展卡尔曼波器 (EKF) 结合改进的PDR和声学估计来确定位置.

主要成果:

  • 在两种场景和异质设备的比较实验中,在8至56.28厘米的局部化准确度.
  • 证明了PDR固有的累积错误的显著缓解.
  • 在不同的实验条件下展示了高强度本地化性能.

结论:

  • 拟议的核聚变定位导航系统有效地整合了声学和PDR方法.
  • 新的阶段长度模型和融合策略提高了准确性,克服了个体系统的局限性.
  • 该方法为基于位置的服务提供了强大而准确的解决方案,特别是在具有挑战性的环境中.