排球落地后的旋转方向判断建模仿真分析

发布时间：2018-12-16 12:28

【摘要】：针对排球落地后的旋转方向一直存在判断不准确的问题,传统的判断方法主要通过对排球运动轨迹过程进行预判断,在缩小范围的情况下提取轨迹特征,对旋转方向进行判断,导致方向判断误差大。提出基于状态检测的排球落地后的旋转方向判断建模方法。上述方法先设计排球旋转的坐标位置和速度向量,获取排球落地后的旋转方向观测值,在此基础上预测各时刻的排球旋转方向的概率密度函数,并进行相似度测量,反复计算排球旋转方向的跟踪质量和目标轨迹评估,利用计算的结果提取排球运动轨迹曲线特征,得到排球落地后的旋转方向确认率,从而有效地建立了排球落地后的旋转方向判断模型。仿真结果表明,上述方法有效地提升了排球落地后的旋转方向判断的精确率。
[Abstract]:In view of the problem that the direction of rotation after volleyball landing has been inaccurate, the traditional judgment method is mainly by pre-judging the course of volleyball track, extracting the characteristics of the track under the condition of reducing the scope, and judging the direction of rotation. Leading to a large error in direction judgment. This paper presents a modeling method for determining the rotation direction of volleyball after landing based on state detection. The above method first designs the coordinate position and velocity vector of volleyball rotation, obtains the observation value of volleyball rotation direction after landing, and then predicts the probability density function of volleyball rotation direction at every moment, and measures the similarity between the two directions. The track quality and target track evaluation of volleyball rotation direction were calculated repeatedly, and the characteristics of volleyball track curve were extracted by using the calculated results, and the confirmation rate of rotation direction after volleyball landing was obtained. Thus an effective model for determining the direction of rotation of volleyball after landing is established. The simulation results show that the above method can effectively improve the accuracy of the direction of rotation after the volleyball landing.
【作者单位】：河南大学民生学院;河南大学体育学院;
【分类号】：G842;TP391.41

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