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CSME 2021/10
Volume 42 No.5
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489-500
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Electrostatics Safety Analysis and Controlling by Design of Experiment and System Thinking for a Railway Vehicle Carriage
Yung-Chang Chenga and Chang-Chih Chu b
aDepartment of Mechatronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan 824, ROC.
bPh. D. Program in Engineering Science and Technology, College of Engineering, National Kaohsiung University of Science and Technology, Taiwan 824, ROC.
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Abstract:
The human body is susceptible to static electricity shock due to movement or friction in dry environment. Static electricity affects the efficiency of train services and public safety in high-speed trains. This study determines the reasons for the accumulation of static electricity in newly purchased trains and the optimal design that prevents accumulation of static electricity. A cause and effect diagram is used to determine the principal factors for the accumulation of static electricity. The Taguchi method and an analysis of variance are used to determine the factors that most significantly affect the accumulation of static electricity and the optimal combination of parameters is derived. The results of the optimization experiment show that the electrostatic potential that accumulates on service personnel can be maintained at less than 1,000 volts, which represents an improvement of 37.7%, so the risk of shock due to static electricity is reduced. Because the humidity measured in carriages has a significant effect on the accumulation of static electricity, T-test is used to compare the humidity in new and old trains. System thinking and causal loop diagram analysis are used to devise strategies to decrease the risk of shock due to an accumulation of static electricity in railway vehicles of the future.
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Keywords: Static electricity, Cause and effect diagram, Taguchi method, System thinking, Causal loop diagram analysis.
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©
2021
CSME , ISSN 0257-9731
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