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相关概念视频

Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

425
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...
425
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

490
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...
490
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

357
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. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
357
Equilibrium and Balance01:15

Equilibrium and Balance

4.8K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
4.8K
Gyroscope: Precession01:24

Gyroscope: Precession

4.5K
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
4.5K
Inertial Frames of Reference01:03

Inertial Frames of Reference

7.2K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
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相关实验视频

Updated: Jul 27, 2025

A Vibrotactile Feedback Device for Seated Balance Assessment and Training
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A Vibrotactile Feedback Device for Seated Balance Assessment and Training

Published on: January 20, 2019

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使用惯性无线传感器和并行训练模型评估建筑物的双轴倾斜.

Luis Pastor Sánchez-Fernández1, Luis Alejandro Sánchez-Pérez2, José Juan Carbajal-Hernández1

  • 1Instituto Politécnico Nacional, Centro de Investigación en Computación, Juan de Dios Bátiz Ave., México City 07738, Mexico.

Sensors (Basel, Switzerland)
|June 10, 2023
PubMed
概括

这项研究引入了一种新的双轴倾斜评估,用于使用MEMS惯性传感器和先进算法的建筑物. 该系统可以实时监测结构倾斜,这对于检测诸如差异性土壤沉积等问题至关重要.

关键词:
双轴倾斜角度 双轴倾斜角度建筑应用程序 建筑应用程序倾斜的严重程度 倾斜的严重程度实时测量的实时测量信号处理 信号处理 信号处理结构健康监测 结构健康监测时间序列算法时间序列算法

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An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
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Method to Measure Tone of Axial and Proximal Muscle
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相关实验视频

Last Updated: Jul 27, 2025

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科学领域:

  • 结构工程 结构工程
  • 地质技术工程 地质技术工程
  • 传感器技术 传感器技术

背景情况:

  • 微电机系统 (MEMS) 传感器在结构健康监测中提供了多功能应用.
  • 当前的实时监控系统往往受到成本和信号处理挑战的限制,尤其是在杂的加速数据方面.
  • 准确处理静态加速度变化是测量双轴倾斜和结构模式的关键.

研究的目的:

  • 开发和验证使用MEMS惯性传感器对建筑物的双轴倾斜评估系统.
  • 解决结构倾斜监测的高效信号处理方面的研究缺口.
  • 允许实时同时监督结构倾向及其严重程度.

主要方法:

  • 利用惯性传感器,Wi-Fi Xbee和互联网连接来实现实时数据采集.
  • 开发了两种专用算法,连续进行数值重复,以处理引力加速信号.
  • 使用一个并行训练模型与神经模型连接,用于识别和分类18种倾斜模式及其严重程度.

主要成果:

  • 开发的算法显著改善了重力加速信号的处理.
  • 倾斜模式是通过计算生成的,考虑到差异化定居点和地震事件.
  • 监控软件实现了0.1°的分辨率,分类器在实验室测试中显示了>95%的精度,回忆,F1分数和准确性.

结论:

  • 拟议的双轴倾斜评估系统有效地实时监测结构倾斜.
  • 先进的信号处理算法和神经模型提供准确的倾斜模式和严重程度的分类.
  • 该系统是监督建筑物的结构健康的可行解决方案,特别是在易受差异性土壤沉积的城市地区.