处理光学捕获运动数据的算法  

Algorithm for Processing Optically Captured Motion Data

作　　者：石娟[1] 王得宇[1,2] 唐刚[1] 

机构地区：[1]上海海事大学物流工程学院,上海201306 [2]杭州国电机械设计研究院有限公司,杭州310030

出　　处：《上海大学学报（自然科学版）》2014年第4期489-497,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(31300783);教育部博士点基金联合资助项目(20123121120004);国家重点基础研究发展计划(973计划)资助项目(2011CB711000);上海海事大学科研基金资助项目(20130474);上海海事大学研究生学术新人培育计划资助项目(GK2013074)

摘　　要：利用光学运动捕捉系统捕获布置在实验对象下肢的标记点的坐标,借助测力板测量动作过程中实验对象受到的外部支反力,编写Matlab程序,并导入以上数据,实现下肢各体段的质心坐标、位移、速度和加速度,以及各关节的角度、角速度、角加速度和关节力、关节力矩等运动参数的快速计算,解决目前已有软件因处理手段繁琐而造成的结果输出周期过长的问题.借用多项式拟合的方法平滑各参数的曲线图,并与Visual 3D软件的处理结果进行对比,验证了算法的准确性.Coordinate values of the markers arranged on the lower extremity of the experimental subject were recorded using an optical motion capture system. Reaction force from the outside was measured with a load board. A program was developed using Matlab to import the above data to quickly calculate the coordinates, displacement, velocity and acceleration of the barycenter in segments of the lower extremity. The joint angle, angular velocity, angular acceleration, joint force, torque and other motion parameters were also calculated. With existing analysis software, the processing methods were complicated and time consuming. This study aims to solve the problem. Using polynomial fitting, curves of various parameters are smoothed, and correctness of the algorithm is verified by comparing the processing results with those generated by Visual 3D software.

关 键 词：光学运动捕捉系统 MATLAB 快速计算 多项式拟合 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]