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.
[1] 冯利正, 陈健. 运动捕捉技术在体育运动中的应用[J]. 杭州师范学院学报: 医学版, 2005 (5): 419-422.
[2] 唐刚. 人体典型运动生物力学分析[D]. 上海: 上海交通大学, 2011.
[3] 伍勰. 基于红外光点捕获系统实现抓举技术的快速反馈[J]. 体育科学, 2010, 30(8): 73-76.
[4] 白雪岭, 王洪生, 张希安, 等. 三维运动学仿真男子举重运动员抓举技术及膝关节运动分析[J]. 中国组织工程研究与临床康复, 2009, 13(35): 6879-6882.
[5] Tang G, Zhang X, Zhang L, et al. A technical method using musculoskeletal model to analyze dynamic properties of muscles during human movement [J]. Computer Methods in Biomechanics and Biomedical Engineering, 2011, 14(7): 615-620.
[6] 中国标准研究中心. GB/T 17245—2004 成年人人体惯性参数[S]. 北京: 中国标准出版社, 2004.
[7] 刘静民. 中国成年人人体惯性参数国家标准的制定[D]. 北京: 北京体育大学, 2004.
[8] 金季春. 利用平衡板测人体运动环节重量和重心位置方法的理论推导[J]. 北京体育大学学报, 1998, 21(2): 1-7.
[9] 郑秀瑗．现代运动生物力学[M]．北京: 国防工业出版社, 2002.
[10] 石岫昆, 高振平, 于萃萍, 等. 计算中国男性人体环节质心位置的多元回归方程的研究[J]. 吉林大学学报: 医学版, 2003, 29(2): 230-231.
[11] Miller D I. A computer simulation model of the airborne phase of diving [D]. Pennsylvania: Pennsylvania State University, 1970.
[12] Passerello C E, Huston R L. Human attitude control [J]. J Biomech, 1971, 4(2): 95-102.
[13] Hatze H. A comprehensive model for human monition simulation and its application to the take-off phase of the long jump [J]. J Biomech, 1981, 14(3): 135-142.
[14] Pandy M G, Zajac F E. Optimal muscular coordination strategies for jumping [J]. J Biomech, 1991, 24(1): 1-10.
