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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

400
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...
400
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

459
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...
459
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

219
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
219
One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

487
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
487
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

330
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...
330
Kinematic Equations: Problem Solving01:15

Kinematic Equations: Problem Solving

12.4K
When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
12.4K

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相关实验视频

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Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
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学习一种自主动态系统来编码人类周期性运动技能.

Zhehao Jin, Andong Liu, Wen-An Zhang

    IEEE transactions on neural networks and learning systems
    |May 14, 2024
    PubMed
    概括

    这项研究引入了一种新方法,用于使用自主动态系统 (ADS) 传递周期性人类运动技能. 该方法学习了没有相位参数的稳定极限周期,提高了对干扰的稳定性.

    科学领域:

    • 机器人技术 机器人技术 机器人技术
    • 控制理论 控制理论
    • 生物力学 生物力学

    背景情况:

    • 人类运动技能转移对机器人技术至关重要.
    • 现有的方法主要侧重于目标导向的运动,忽视周期性运动.
    • 周期动态运动原始体 (DMP) 容易受到由于相位参数的空间干扰.

    研究的目的:

    • 开发一种新的学习方法,一种用于传递周期性运动技能的自主动态系统 (ADS).
    • 解决现有方法的局限性,特别是周期动态运动原始体 (DMP) 中对空间干扰的敏感性.
    • 在不依赖相位参数的情况下创建具有稳定的极限周期的ADS.

    主要方法:

    • 通过学习数据驱动的利亚普诺夫函数 (能量函数) 来表示周期性人类运动轨迹.
    • 自主动态系统 (ADS) 是通过解决与能量函数相关的受约束优化问题来学习的.
    • 约束函数旨在确保轨迹趋同到模仿人类演示的能量水平表面.

    主要成果:

    • 拟议的方法成功地学习了具有周期运动稳定极限周期的ADS.
    • 开发的系统证明了对空间干扰的稳定性,与传统的周期性DMP不同.
    • 实验结果验证了新方法对周期性人类运动技能转移的有效性.

    更多相关视频

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    MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions
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    结论:

    • 这种新的方法有效地通过学习具有稳定的极限周期的自主动态系统 (ADS) 来实现周期性运动技能的转移.
    • 消除相位参数可以提高系统的稳定性和对空间干扰的强度.
    • 这种方法为机器人工程中更具多功能的人类运动模拟提供了有前途的方向.