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弧旋球制导技术的主要功能与特性 预览

Major Functions and Characters of Controlling and Guidance Techniques of Rotating Arc Ball
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摘要 乒坛流行"弧旋球的功能为旋转"。本文认为弧旋球是带有强烈上旋的且在香蕉形轨迹旋进的复合运动,故"弧旋球的功能为旋转"的论点有失偏颇。本文指出,弧旋球之所以上旋且沿香蕉形轨迹旋进,是旋扭与旋进合力的作用使球出拍后旋转角速度矢量和平动速度矢量不重合,在与旋转角速度矢量和平动速度矢量的平面垂直的方向上产生横向力使旋进方向明显向下偏转,形成香蕉形轨迹。香蕉形轨迹的球命中率高于其它球,旋转强度高与旋进速度快,尤其变轨和离台反弹降角的特性导致得分高于其它球。弧旋球的旋进合力由摩擦反弹携带的制导技术产生。摩擦反弹携带功能由切撞的制导技术产生。此为弧旋球制导技术的主要功能与特性。 In the world of table tennis there is a saying: "The function of rotating arc ball is for rotating. "The paper considers rotating arc ball as a combined motion with strong top spin and making precession on banana shaped track. As a result,the saying itself is biased. This paper suggest that,the reason why rotating arc ball top spins and makes precession on banana shaped track is because under the resultant force of rotation and precession,when the ball leaves the paddle,rotational angle- velocity vector and translational velocity vector never coincide,and precession direction is downward deviated due to the lateral force produced in a direction perpendicular to rotational angle- velocity vector and translational velocity vector. Balls in banana shaped track hold higher hit rate,stronger spin force and faster precession speed,and meanwhile,its 2 features of orbital transfer and reflected angle decrease after rebounding causes a higher scoring average. The precession resultant force is produced by the guidance technique brought by friction rebounding. Friction rebounding carrying function is produced by chopping hit guidance technology. The above are the main function and features of rotational guidance technique.
作者 禹雪璐 罗辉 Yu Xuelu;Luo Hui (Sport Department of Nanjing University, Nanjing 210093, Jiangsu, China)
出处 《体育科技文献通报》 2016年第8期61-62,共2页 Bulletin of Sport Science & Technology
关键词 制导 旋进 香蕉形轨迹 变轨 反弹降角 guidance precession banana shaped track orbital transfer reflected angle decrease
作者简介 禹雪璐(1983-),女,河南开封人,助教,硕士,研究方向:乒乓球教学与训练。
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