面向逆向动力学仿真驱动和验证的半蹲式跳伞着陆实验研究

目的半蹲式跳伞着陆模拟实验的设计和相关数据测量,为逆向动力学软件AnyBodyModelingSystem模型的建立、驱动和验证提供数据。方法根据逆向动力学分析数据驱动和验证的需要,受试者从0.32m高的平台跳落,模拟半蹲式跳伞着陆。对受试者下肢关节运动学参数、地面反力以及下肢4块主要肌肉的肌电图进行测量。结果受试者在与地面接触前后1s内,髋、膝、踝关节角度随时间的变化、右脚地面反力以及压力中心轨迹用来驱动模型;肌电活动性测量数据用来验证模型。结论实验设计可以满足肌骨模型分析的要求,并可用于对半蹲式跳伞着陆的进一步研究。

Experimental study on the half-squat parachute landing for driving and validating the inverse dynamic simulation

Objective To provide data for establishing, driving and validating the inverse dynamics model of AnyBody Modeling System, the simulated half squat parachute landing experiment was designed and relevant data were collected. Method The subject was required to jump from a 0.32 m high platform to simulate the half squat parachute landing. The kinematic parameter of lower extremity joint, the ground reaction force and the surface electromyogram (SEMG) of four main muscles in the lower extremity joint were measured simultaneously. Results The angle changes of hip, knee and ankle along with time in three anatomical planes, the ground reaction force of right foot and the trajectory of the center of pressure were collected within 1 second just before and after the subject landing. These data would be used to drive the muscleskeletal model, while the data for measuring electromyogram activity would be used to validate the model. Conclusions The experiment meets the requirement of muscleskeletal model analysis, which can be used for further study of half squat parachute landing.