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相关概念视频

Azimuths and Bearings01:19

Azimuths and Bearings

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Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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In surveying, meridians are vital reference lines to measure directions and establish accurate land orientations. Meridians run from the north to the south poles, providing a stable framework for angular measurements and mapping. Meridians are fundamental in survey design, with the primary types being astronomic, magnetic, and assumed meridians. Each type offers distinct benefits and limitations, selected based on the project's scale and precision needs.The astronomic meridian is aligned with...
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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.
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基于IMU/磁力计的亚齐木斯估计与规范约束过.

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  • 1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.

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概括
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一种新的旋转规范约束选 (RNCF) 方法提高了测量-钻探过程中的 (MWD) 系统中的近视角估计. 这种技术显著提高了定向钻探的准确性,即使在强磁干扰的环境中也是如此.

关键词:
向方向的估计估计.地磁场是一个地磁场.在钻井过程中进行测量.旋转规范约束波器过器

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科学领域:

  • 地质物理学 地质物理学
  • 钻井工程 钻井工程
  • 传感器融合式传感器

背景情况:

  • 传统的基于磁力计的测量钻井系统 (MWD) 依赖于加速计和磁力计进行深孔定向测量.
  • 地磁性近视度解决方案容易出现由磁干扰引起的重大错误,这是钻井操作中常见的问题.
  • 现有的方法在强磁扰乱的情况下往往难以保持准确性.

研究的目的:

  • 提出一种新的旋转规范约束过 (RNCF) 方法,用于对基于陀螺仪辅助磁力计的MWD系统的方程估计.
  • 为了提高下孔定向测量的精度和可靠性,特别是在磁干扰下.
  • 为在具有挑战性的钻井环境中提供可靠的解决方案,用于准确的近视距离测定.

主要方法:

  • 基于科里奥利斯方程的新磁动力系统的设计,以建模地磁向量.
  • 将规范约束程序集成到卡尔曼波器中,通过将地磁状态向量组件规范化.
  • 使用陀螺仪辅助方法来补充磁力计数据,以提高系统性能.

主要成果:

  • 拟议的RNCF方法证明了在近视距离测量精度的显著改善.
  • 在根平均平方误差 (RMSE) 意义上,比典型的地磁解决方案提高了98.5%,比标准卡尔曼过 (KF) 提高了37.1%.
  • 通过模拟和实际钻探实验在强磁干扰环境中验证的有效性.

结论:

  • 在MWD系统中,RNCF方法提供了一个强大的和有效的解决方案,以提高向估计的准确性.
  • 这种方法显著减轻了磁干扰对定向钻探测量的影响.
  • 这些发现支持采用RNCF来提高深孔定向调查的精度.