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首页> 外文期刊>International Journal of Industrial Ergonomics >The effects of a moving environment on postural control and task performance during manual materials handling, visual tracking and arithmetic tasks
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The effects of a moving environment on postural control and task performance during manual materials handling, visual tracking and arithmetic tasks

机译：移动环境对手动材料处理，视觉跟踪和算术任务期间的姿势控制和任务性能的影响

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The purpose of this study was to evaluate the performance of cognitive tasks and manual materials handling in a moving environment. Specifically, we were interested in how task performance, postural control and lower limb muscle activation changed when tasks were performed in motion compared to no motion conditions. The motion trials were performed on a MOOG 2000E that created a 5-degree of freedom simulated environment. The tasks examined were a lifting task, a mental arithmetic task and a visual tracking task. Results of this experiment indicated that two outcome measures of a visual tracking task (time to task completion and performance errors) were negatively affected by motion, while arithmetic task performance was unaffected. Additionally, postural control was not affected by the presence of motion in the two cognitive tasks. Lifting was the only task where postural control appeared to be negatively affected as participants exhibited significant increases in lower limb muscle activation and non-significant increases in number of steps taken. The significant increase in time to completion and errors suggest that workers performing visual tracking type tasks in an offshore environment may be more prone to committing human factors errors. Furthermore, the results suggest that the risk of falls and injury due to loss of balance may be highest in workers regularly performing lifting tasks as this was the only instance where task performance in a moving environment negatively impacted postural control. These findings were attributed to greater demands placed on the postural control system when lifting during the motion condition. This study provides ergonomists with a resource they can use to better appreciate the risks associated with performance of job related tasks in a moving environment.
机译：本研究的目的是评估在移动环境中处理认知任务和手动材料的性能。具体而言，我们对任务性能，姿势控制和低肢体肌肉激活有关当在运动中进行的任务时更改的变化感兴趣，而与没有动作条件相比，在运动中进行了相比。在穆波2000E上进行运动试验，该摩尔2000E产生了5度自由度模拟环境。检查的任务是一个提升任务，心态算术任务和视觉跟踪任务。该实验的结果表明，通过运动对视觉跟踪任务（任务完成和性能错误的时间）的两项结果测量产生负面影响，而算术任务表现不受影响。此外，姿势控制不受两种认知任务中的运动的影响。提升是唯一的任务，姿势控制因参与者在较低的肢体肌肉激活和所采取的步骤数量的非显着增加而产生负面影响。完成和错误的时间内显着增加表明，在海上环境中执行视觉跟踪类型任务的工人可能更容易发生人类因素错误。此外，结果表明，经常执行举起任务的工人损失导致的跌倒和伤害的风险可能是最高的，因为这是移动环境中的任务性能受到对姿势控制的唯一实例。这些发现归因于在运动条件下提升时对姿势控制系统的更大要求。本研究提供了与资源的人​​体工程学家，他们可以用来更好地欣赏与在移动环境中与职位相关任务的性能相关的风险。

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