초록
Objective: This study was carried out to identify the effect of turning effect on the operating feel of jog dial and propose the design guide of turning effect. Background: Sensibility is considered important in car design. Jog dial is one of the most important human-machine interfaces in car. Therefore, various studies are needed on the sensibility of jog dial. Method: Three experiments were carried out for this study. The first experiment was to identify the preferable knob height of jog dial. The second experiment was to identify the effect of turning effect for the operating feel of jog dial. The third experiment was to identify the just noticeable difference of the turning effect of jog dial. Some experimental models such as jog dial were made for the experiments and finger pressures were measured when operating jog dial. The operating feel of jog dial was subjectively evaluated after the experiment. Results: Turning effect did significantly affect the operating feel of jog dial at the 0.05 level. The operating feel was highest in turning effect of 3Ncm and just noticeable difference for the turning effect was 0.6Ncm. The relationship between turning effect and operating feel showed negative correlation. The pressure of thumb and index finger is higher than middle finger when operating jog dial. Conclusion: From the result, the turning effect of 3Ncm (${\pm}0.6Ncm$) is suitable to provide high operating feel when operating a jog dial. Application: The results of this study can be applied to the design of jog dial in car.
