열차 시뮬레이터 운행 시 기관사의 심리적/육체적 변화에 관한 연구

Abstract

The purpose of this study is to investigate changes of Psychological and physical responses during the simulator driving. Train drivers use their forearm 4hours/day for normal operation. The frist, the method for measuring the driver's physical response is to investigate changes in the forearm-muscle fatigue of a train driver operating the MasCon by using EMG(Electromyogram) measurement technique. Accordingly, four different EMG signals of deltoid, biceps brachii, brachioradialis, flexor carpi ulnaris muscle of upper extremity have been measured and analyzed. The raw EMG Signals have been converted into median frequency using spectrum analysis. As the result, 80% of 10 subjects(real train drivers) showed that median frequency value of all four muscles has been reduced after 30 minutes of train operation. This results demonstrated that operating MasCon for 30 minutes could induce muscle fatigue. The second, the method for measuring the driver's psychological response is to investigate changes of GSR(Galvanic Skin Response) at the same time. As the result, GSR value significantly increased over time. this means that driver's emotional awakening is increased. This is likely to cause mental stress.