ICARUS: Modelling Human Falls for Forensics - Passive Models

Falls are a significant cause of injury-associated deaths. In cases where the events leading up to a fall are unclear, a forensic investigation may be required to uncover the cause. During the forensic reconstruction process, tools for objective scenario-evaluation are needed. Computer simulations appear to be a promising tool for fall reconstruction, being cheaper in terms of both money and time than the alternative of physical scenario-reconstruction. Although software packages intended for modelling the kinetics and kinematics of the human body exist, none were found that were validated specifically for fall-reconstruction. The aim of the current study was to validate the performance of human body modelling software Madymo, intended for use in car-crash simulations, in reconstructing human falling movements. This was achieved by first performing experiments in which the kinematics and kinetics of participants were recorded during falls from a short height. Next, the initial conditions taken from the experimentally recorded falls were used as input to run corresponding simulations using Madymo. Finally, the results from the simulated falls were compared to those from the real falls, based on the posture just before landing. Our results suggest that Madymo is currently not yet suitable for use in reconstructing real human falls, and is therefore not yet fit for application in forensic investigations into falls.<br>This dataset provides all registered video, motion capture suit, simulations, data-processing code and processed data of this project.跌倒已成为损伤相关死亡的重要诱因。当跌倒事件的前因不明时，往往需要开展法医调查以探明其发生原因。在法医重建工作中，亟需能够用于客观场景评估的工具。计算机仿真技术似乎是跌倒重建的极具前景的手段，相较于实体场景重建，其在时间与经济成本上均更为低廉。目前虽已有可用于人体动力学与运动学建模的软件包，但尚未发现专门针对跌倒重建场景完成验证的同类工具。本研究旨在验证一款原本用于汽车碰撞仿真的人体建模软件Madymo在重建人体跌倒动作中的性能。具体实现路径为：首先开展实验，记录受试者从低矮高度跌倒过程中的运动学与动力学数据；随后将实验中记录的跌倒初始条件作为输入，利用Madymo运行对应仿真；最后基于着陆前瞬间的姿态，将仿真结果与真实跌倒实验数据进行对比。研究结果表明，Madymo目前尚不适合用于真实人体跌倒的重建，因此暂不适用于跌倒相关的法医调查工作。<br>本数据集包含本项目所有已登记的视频、动作捕捉服采集数据、仿真结果、数据处理代码与经处理后的数据集。