Abstract
Generally, construction machineries are used in severe environment such as waste land and a mine. So, Fatigue of operator bring about delay of response and mistakes. Therefore, improvement of human fatigue bring prevention of their harmful effect and improvement of work efficiency. And then, evaluation that is able to compare human fatigue is required, so we inspected whether subjective evaluation and objective evaluation. So, we made the simple robot arm imitated a front of construction machinery, and evaluated human fatigue and work efficiency with vertical lever and horizontal lever. We used NASA-TLX, Flicker test and comparison of work efficiency for evaluation. From the experiment, we got the two results. The first, NASA-TLX and other evaluations method showed similar inclination. The second, horizontal lever had properties that is more efficient than vertical lever and besides larger physical fatigue in this experiment condition.
