Tennis balls judgment model based on numerical simulation
1 Institute of Physical Education, Huanggang Normal University, Huangzhou 438000, China
2 Macaomiao Primary School, Tuanfeng 438000, China
3 Yidu Gaobazhou Middle School, Yidu 443300, China
4 Fangxian Mengu Middle School, Shiyan 442108, China
According to the principle of “eagle eye”, assuming that in the absence of the wind and air density uniform, tennis because of deformation produced by hitting, accurate to tennis in flight by gravity, air resistance, the tennis movement into the vertical direction and horizontal direction. Solution can be obtained using the ideas of calculus, thus draws the tennis range, fall to the ground, placement time and location. Increase the rotation of the tennis, according to the formula of sports biomechanics, the pressure difference to produce in vertical direction of the velocity and angular velocity magnus force, solving the stead yunus force coefficient, through the best tennis in the vertical direction of the time needed for higher level computation, model are described in detail in tennis trajectories of the rotating cases and placement, and intuitive simulation diagram of the flying track.
© The Authors, published by EDP Sciences, 2017
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