Department of Industrial Engineering, Ajou University, Suwon, South Korea.
Appl Ergon. 2013 Jul;44(4):636-42. doi: 10.1016/j.apergo.2012.12.005. Epub 2013 Jan 21.
The purpose of this study is to identify joint motion patterns by classifying the full range of motion (ROM) into several sections. Forty participants were stratified by age and gender and they performed 18 full-swing motions at a self-selected speed. Joint angle, angular velocity, angular acceleration, and subjective discomfort rating were collected for each motion. K-means cluster analyses were used to classify joint motion patterns and ROM sections. The results showed that two or three clusters were mainly determined by the kinematic variables of angular velocity and acceleration. The motions of three clusters showed that the ROM sections of low and moderate velocity with moderate and high accelerations occurred in the initial (negative) and terminal (positive) phases, respectively, whereas those of high velocity with low acceleration were shown in the mid (neutral) phase. The motions of two clusters revealed that while the patterns of high velocity and high acceleration were found on the positive side of the ROM, those of low velocity and low acceleration were on the negative and neutral sides. The ROM sections close to both ends of the ROM may have a larger physical load than the others. This study provides information that could be useful for developing postural analysis tools for dynamic work.
本研究旨在通过将全运动范围（ROM）分为几个部分来识别关节运动模式。40 名参与者按照年龄和性别分层，以自选速度完成 18 次全摆动运动。为每个运动收集关节角度、角速度、角加速度和主观不适评分。使用 K 均值聚类分析对关节运动模式和 ROM 部分进行分类。结果表明，两个或三个簇主要由角速度和加速度的运动学变量决定。三个簇的运动表明，低和中速度以及中高加速度的 ROM 部分分别出现在初始（负）和终末（正）阶段，而低加速度和高速度的运动则出现在中间（中性）阶段。两个簇的运动表明，高速度和高加速度的模式出现在 ROM 的正侧，而低速度和低加速度的模式出现在负侧和中性侧。ROM 接近 ROM 两端的部分可能比其他部分承受更大的物理负荷。本研究提供的信息可能对开发动态工作的姿势分析工具有用。
