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。
A modeling method of the rotation direction judgment of volleyball after landing is proposed based on state detection.Firstly,the volleyball rotating coordinate position and the velocity vector are designed to obtain the observation value of the rotation direction after the landing of volleyball,and the probability density function of the rotation direction of the volleyball at all times is predicted.The similarity is measured,and the direction of rotation of the volleyball tracking quality and target trajectory evaluation are repeatedly calculated.The computational results are used to extract the characteristics of volleyball trajectory curve.The recognition rate of the rotation direction after the landing is got so as to establish the model of the rotation direction after the landing.The simulation results show that the above method can effectively improve the accuracy of the rotation direction judgment of the volleyball after landing.
出处
《计算机仿真》
北大核心
2017年第3期217-220,共4页
Computer Simulation
关键词
排球落地
旋转方向判断
基于状态
Volleyball landing
Rotating direction judgment
State-based
