在高尔夫球摆动期间胸部的角运动:比较两个定向角度序列
Seungho Baek1, Kanji Mori1, Kai-Jen Cheng1
1Biomechanics & Motor Behavior Laboratory, Texas Woman's University, Denton, TX, USA.
Sports biomechanics
|January 30, 2025
概括
选择正确的旋转序列是分析身体运动的关键. 与传统的旋转曲侧曲 (RBSB) 方法相比,新的曲方向-曲-旋转 (LDLR) 序列最大限度地减少了高尔夫球摆动期间胸部运动分析的错误.
科学领域:
- 生物力学 生物力学
- 运动学 运动学
- 运动科学 运动科学 运动科学
背景情况:
- 定向角度对于描述复杂的身体运动至关重要.
- 选择适当的旋转序列对于准确的运动分析至关重要.
- 现有的方法,如旋转曲侧曲 (RBSB),可能会引入显著的角度交叉交谈.
研究的目的:
- 开发可通用的策略来选择主要轴中心旋转序列.
- 为了比较一个新方向-旋 (LDLR) 序列与传统的RBSB序列.
- 在高尔夫球驾驶过程中评估胸部运动中的跨角交谈.
主要方法:
- 开发主要轴中心序列选择策略.
- 在高尔夫球驾驶过程中对胸部运动应用LDLR序列.
- 使用跨角度交叉交谈指标 (ICC值,RMS角度范围) 进行LDLR和RBSB序列的比较.
主要成果:
- RBSB序列显示了显著更高的跨角交叉交谈 (ICC值≥0.837).
- LDLR 序列呈现出最小的交叉对话 (ICC 值 ≤0.063).
- 由于交叉通话,RBSB导致了更大的RMS角度范围,表明了由于交叉通话而导致的角度"通胀".
结论:
- LDLR序列准确地代表了高尔夫球驱动器中的轴旋转主导胸部运动.
- 开发的策略为方向角度的应用提供了可概括的指导方针.
- LDLR方法提高了生物力学方向角度分析的准确性和适用性.
相关概念视频
Relative Motion Analysis using Rotating Axes
443
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...
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...
443
Unsymmetric Bending - Angle of Neutral Axis
277
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
277
Angle of Twist - Elastic Range
271
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
271
Relative Motion Analysis using Rotating Axes - Acceleration
319
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...
Time differentiation is...
319
Relative Motion Analysis - Velocity
337
A stroke engine has a slider-crank mechanism that 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.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
337
Relative Motion Analysis - Acceleration
328
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...
328


