Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel; Institute of Agricultural Engineering, Agricultural Research Organization, Bet Dagan, Israel.
Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer Sheva, Israel.
Appl Ergon. 2019 Nov;81:102871. doi: 10.1016/j.apergo.2019.06.002. Epub 2019 Jun 18.
This study compared the spinal moments (i.e., peak and cumulative moments acting on the L5/S1 joint), kinematics (i.e., peak trunk and knee angles) and work pace of workers, when either removing a box from a shelf or depositing a box on a shelf, under two conditions: as a single task or as part of a combined task. An experiment was conducted, in which the subjects performed the tasks and were recorded using a motion capture system. An automated program was developed to process the motion capture data. The results showed that, when the removing and depositing tasks were performed as part of a combined task (rather than as single tasks), subjects experienced smaller peak and cumulative spinal moments and they performed the tasks faster. The results suggest that investigations into the separate tasks that comprise a combination have a limited ability to predict kinematics and kinetics during the combined job.
本研究比较了工人在两种情况下（即作为单个任务或组合任务的一部分）从货架上取下盒子或将盒子放在货架上时的脊柱力矩（即作用于 L5/S1 关节的峰值和累积力矩）、运动学（即峰值躯干和膝盖角度）和工作节奏。进行了一项实验，其中受试者执行任务并使用运动捕捉系统进行记录。开发了一个自动程序来处理运动捕捉数据。结果表明，当移除和放置任务作为组合任务的一部分（而不是作为单个任务）执行时，受试者经历的峰值和累积脊柱力矩较小，并且他们执行任务的速度更快。结果表明，对组合任务中单独任务的研究对组合作业期间的运动学和动力学预测能力有限。
