Validation of a Three-Dimensional Baseball Pitching Model
Validation of a Three-Dimensional Baseball Pitching Model
复制标题
三维棒球投球模型的验证
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. Hubbard
中科院分区：
文献类型：
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作者：
N. Fujii;M. Hubbard
建立了棒球投球最佳动作与肌肉力量关系的仿真优化程序。四个部分（躯干，上臂，下臂，手）和六个扭矩发生器（肩膀，肘部，手腕）建模。力矩发生器具有希尔式肌肉功能的力矩角特性和力矩角速度特性。优化目标函数包括释放速度和惩罚关节载荷和不精度的负项。节点荷载的权重系数对计算结果影响较大。随着这个系数的增加，运动变得更接近于实际测量的音高。结合针对不同权重系数优化的活动状态模式，在模拟运动中获得更大的关节载荷。这支持了一个假设，即良好协调的主动状态对于控制不同转矩发生器之间的关系至关重要，从而产生合理有效的俯仰力矩。
A simulation and optimization procedure was constructed to investigate the relationships between optimal movement and muscular strength for baseball pitching. Four segments (torso, upper arms, lower arms, hands) and six torque generators (shoulders, elbows, wrists) are modeled. The torque generators have torque-angle and torque-angular velocity characteristics of Hill-type muscle function. The optimization objective function includes release velocity and negative terms penalizing joint loading and inaccuracy. The weighting coefficient for joint loads has a strong influence on the results. As this coefficient increases, the motion becomes more similar to actual measured pitches. Combining active state patterns optimized for different weighting coefficients gives larger joint loads in the simulated motion. This supports the hypothesis that well-coordinated active states are important for controlling the relationships of the different torque generators in order to create a reasonable and effective pitching m...
影响因子：
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作者：
F. Zajac
通讯作者：
F. Zajac
肘部和肩部等长力矩的测量：四肢瘫痪后三角肌到三头肌肌腱转移的位置依赖性强度。
DOI：
10.1109/86.547942
发表时间：
1996
期刊：
IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society.
影响因子：
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作者：
Kirsch,RF;Acosta,AM;Perreault,EJ;Keith,MW
通讯作者：
Keith,MW