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相关概念视频

Relative Motion Analysis - Acceleration01:10

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A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
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In everyday conversation, accelerating means speeding up. Acceleration is a vector in the same direction as the change in velocity, Δv, therefore the greater the acceleration, the greater the change in velocity over a given time. Since velocity is a vector, it can change in magnitude, direction, or both. Thus acceleration is a change in speed or direction, or both. For example, if a runner traveling at 10 km/h due east slows to a stop, reverses direction, and continues their run at 10 km/h...
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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.
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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.
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The importance of understanding acceleration spans our day-to-day experiences, as well as the vast reaches of outer space and the tiny world of subatomic physics. In everyday conversation, to accelerate means to speed up. For instance, we are familiar with the acceleration of our car; the harder we apply our foot to the gas pedal, the faster we accelerate. The greater the acceleration, the greater the change in velocity over a given time. Acceleration is widely seen in experimental physics. In...
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Acceleration occurs when velocity changes in magnitude (an increase or decrease in speed), direction, or both. Although acceleration is in the direction of the change in velocity, it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion. This is commonly referred to as deceleration. However, the term deceleration can cause confusion in analysis because it is not a vector; it does not point to a specific direction with...
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皮卡加速信号处理技术说明

Mark E Pryer1, John Cronin1,2, Jono Neville1

  • 1Auckland University of Technology, Sports Performance Research Institute, FHES, SPRINZ, Auckland New Zealand; and.

Journal of strength and conditioning research
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PubMed
概括
此摘要是机器生成的。

本研究提出了一种新方法,用于分析运动员使用电动直线位置编码器技术的冲刺加速度 (拾取加速度). 该技术允许在现场设置中进行详细的,逐步的机械洞察,帮助个性化培训计划.

关键词:
发展速度的发展速度.冲刺表现的表现 冲刺表现生物力学 生物力学冲刺 冲刺 冲刺 冲刺 冲刺 冲刺团队运动是团队运动.

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科学领域:

  • 运动科学 运动科学 运动科学
  • 生物力学 生物力学
  • 发动机控制器的控制器

背景情况:

  • 冲刺加速,特别是从动态位置的提升加速,对于团队体育表现至关重要.
  • 现有的关于皮卡加速的研究是有限的,这阻碍了对其机制的深入理解.
  • 基于实验室的生物力学分析冲刺加速往往是不切实际的现场设置.

研究的目的:

  • 开发和验证一种定制的信号处理方法,用于分析采集加速期间的特定步骤变量.
  • 在加速阶段提取关键机械参数,如速度,加速度,水平力和步长.
  • 为了使实践,基于现场的冲刺力学对力量和调节从业者进行实践评估.

主要方法:

  • 利用电动化的线性位置编码器技术来捕获冲刺数据.
  • 开发了一个自定义的 MATLAB 脚本来识别关键步骤并计算动力学和动力学变量.
  • 在训练有素的运动员中分析了30米冲刺的接近,过渡和拾取步骤,并控制了进入速度.

主要成果:

  • 定制脚本成功识别和分析了特定步骤的数据,包括速度,加速度,水平力和步骤长度.
  • 该方法在关键的拾取加速阶段有效捕获机械洞察力.
  • 该分析提供了在现场设置中冲刺加速的详细,逐步的机械概况.

结论:

  • 使用描述的信号处理方法,在现场设置中逐步分析拾取加速是可行的和有效的.
  • 这种方法提供了以前仅限于实验室环境的有价值的机械见解.
  • 该方法为力量和健身从业者提供了一种实用且便携式的解决方案,以评估和告知冲刺表现的个性化训练处方.