Ergonomic design and analysis of character coding on display interface

Aiming at the problems of character design on the human-machine interface, lots of static simulation experiments were taken based on a closed simulated cockpit. 32 subjects were participated in the experiments. Reaction time and correct rate were used as ergonomic evaluation indexes. The identification performances of Chinese, English, numbers, and symbols which were shown on the display interface under different illumination levels, color matching and character heights were obtained. Result indicates that the identification performances of the Chinese/English, numbers and normal symbols significantly different. Illumination between 0 to 600 lx has little effects on the character identification performances. Color matching has significantly effects on the characters identification performances. The identification performances of yellow/white and green/cyan are worse and should not be used in character coding design. On the basis of conclusions and deep analysis of the experiment date, a mathematical model of character coding design on the display interface is established, which will provide a reference for coding design of aircraft cockpit human-machine interface.