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Measuring Acceleration Due to Gravity01:12

Measuring Acceleration Due to Gravity

561
Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
561
Gyroscope01:02

Gyroscope

3.0K
A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
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Gyroscope: Precession01:24

Gyroscope: Precession

4.0K
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...
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Magnetic Force01:18

Magnetic Force

954
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
954
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

460
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...
460
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

401
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...
401

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相关实验视频

Updated: Jun 27, 2025

Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT
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Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT

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从MEMS磁性,角速率和重力 (MARG) 模块进行强大的定向估计,用于人机交互.

Pontakorn Sonchan1, Neeranut Ratchatanantakit1, Nonnarit O-Larnnithipong1

  • 1Electrical and Computer Engineering Department, Florida International University, Miami, FL 33174, USA.

Micromachines
|April 27, 2024
PubMed
概括

一个新的算法,GMVDμK (GMVDK),通过使用微电机系统 (MEMS) 传感器模块来增强方向估计. 它为人与计算机交互等应用提供了对磁性干扰的更强的稳定性.

关键词:
在 GMVDK 算法中,的GMVDμK算法.在MEMS MARG的方向上.磁力扭曲是指磁力扭曲的发生.人类计算机交互的导向.

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A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation
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Simultaneous Scalp Electroencephalography EEG, Electromyography EMG, and Whole-body Segmental Inertial Recording for Multi-modal Neural Decoding
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Simultaneous Scalp Electroencephalography EEG, Electromyography EMG, and Whole-body Segmental Inertial Recording for Multi-modal Neural Decoding

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相关实验视频

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Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT
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A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation
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科学领域:

  • 传感器融合和惯性导航
  • 机器人和人机交互的人机交互
  • 对于MEMS设备的信号处理.

背景情况:

  • 低成本的微型电机系统 (MEMS) 加速度计,陀螺仪和磁力计提供了对象跟踪的潜力,但受到信号质量限制.
  • 现有的MEMS惯性测量单元 (IMU) 和磁性,角速率和重力 (MARG) 传感器模块面临着由于传感器噪声和偏差不稳定性导致的长期方向估计的挑战.
  • 准确的定位跟踪对于人机交互和物联网 (IoT) 设备监控等应用至关重要.

研究的目的:

  • 开发和介绍一种新的算法,GMVDμK (GMVDK),用于使用MARG传感器模块进行可靠的方向估计.
  • 利用来自MARG模块的所有可用的传感器信号来克服单个传感器的局限性.
  • 专门解决在人机交互背景下对方向估计的挑战.

主要方法:

  • 开发了GMVDμK (GMVDK) 算法,该算法旨在利用来自MARG模块的所有信号.
  • 实施策略以防止过度校正,并提高对传感器噪声和干扰的稳定性.
  • 实验验证和与现有的MARG定向估计算法进行比较.

主要成果:

  • 通过有效利用所有MARG传感器信号,GMVDμK (GMVDK) 算法证明了可靠的方向估计.
  • 实验结果显示,GMVDK在处理磁性干扰方面明显优于其他算法.
  • 该算法成功地缓解了与低成本MEMS传感器信号质量差相关的问题.

结论:

  • 该GMVDμK (GMVDK) 算法代表了使用低成本MARG传感器模块的方向估计的重大进步.
  • 对于需要准确的长期定位跟踪的应用,GMVDK提供了更可靠的解决方案,特别是在磁干扰环境中.
  • 这种算法提高了使用基于MEMS的MARG传感器用于先进的人机交互和物联网应用的可行性.