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Optimization of Tactile Material Properties to Improve Affection Satisfaction of Vehicle Interior Materials

자동차 내장 재질의 감성 만족도 향상을 위한 촉각적 물성치의 최적화

  • Park, Jaekyu (LG electronics, Home Appliance & Air Solution Company, Appliance Advanced Technology 4 Team) ;
  • Park, Sungjoon (Namseoul University, Department of Industrial Management Engineering)
  • 박재규 (LG전자 H&A 사업본부 어플라이언스 선행기술4팀) ;
  • 박성준 (남서울대학교 산업경영공학과)
  • Received : 2018.02.07
  • Accepted : 2018.08.21
  • Published : 2018.08.31

Abstract

Objective: The purpose of this study is to investigate the effects of the roughness, friction coefficient, and hardness, which are typical properties related to tactile affection affecting the interior affective satisfaction for Thermoplastic Olefin (TPO) materials. This study also aims to derive optimal design values to maximize tactile affective satisfaction. Background: There are a variety of design variables related to tactile affection of vehicle interior materials. Previous studies about sensibility engineering for vehicle interior material mainly interested to visual sense, and some studies for tactile sense had limitations performed in actual vehicle conditions where human sensibility could be affected by several noise factors. Therefore, it is necessary to make material's samples considering various levels of design variables related to the material properties, and to determine the optimal design combinations to improve tactile affection. Method: A total of 72 subjects, 59 males and 13 females, participated in this experiment. A total of 18 TPO materials were fabricated to evaluate the affective satisfaction, according to the physical property levels of the interior materials. Affective satisfaction with a sense of touch was used as a dependent variable, and roughness, hardness and coefficient of friction were considered as three independent variables. For 18 samples provided by combinations of three independent variables, the affective satisfaction was measured repeatedly according to the within-subject design. ANOVA and regression analysis were carried out to derive optimal design values for vehicle interior materials. Results: The optimal regression model was derived from the best subset regression analysis, which included hardness and roughness variables. In addition, the optimal design values were predicted through the iso-response contour plots obtained by the response surface model. The optimum tactile affection condition can be provided from the middle level of hardness and the low level of roughness. Conclusion: By suggesting the optimal material property level of TPO material, it is possible to provide improved affective satisfaction that can be felt in high quality interior materials. Application: This study can be used to improve tactile affection for vehicle interior design, and be helpful to cost reduction through replacing artificial leathers by improved TPO materials.

Keywords

References

  1. Bahn, S., Yun, M.H., Lee, C. and Lee, J.H., Development of Luxuriousness Models for Automobile Crash Pad based on Subjective and Objective Material Characteristics, Journal of the Ergonomics Society of Korea, 25(2), 187-196, 2006. https://doi.org/10.5143/JESK.2006.25.2.187
  2. Bahn, S., Lee, C., Nam, C.S. and Yun, M.H., Incorporating affective customer needs for luxuriousness into product design attributes, Human Factors and Ergonomics in Manufacturing & Service Industries, 19(2), 105-127, 2009. https://doi.org/10.1002/hfm.20140
  3. Chatterjee, S., Hadi, A.S. and Price, B., Regression analysis by example, Wiley, 2000.
  4. Han, S.H., Jung, E.S., Jung, M., Kwahk, J. and Park, S., Psychophysical methods and passenger preferences of interior designs, Applied Ergonomics, 29(6), 499-506, 1998. https://doi.org/10.1016/S0003-6870(97)00009-4
  5. Hwang, C.L. and Yoon, K., Multiple Attribute Decision Making: Method and Application, Springer-Verlag, New York, 1981.
  6. Jung, G., Park, S., Kim, S.M. and Jung, E.S., Effects of Design Factors of the Instrument Cluster Panel on Consumers' Affection Applying Robust Design, Journal of the Ergonomics Society of Korea, 29(1), 25-31, 2010. https://doi.org/10.5143/JESK.2010.29.1.025
  7. Jung, E.S., Chun, Y.H., Kee, D., Yun, M.H., Choe, J., Park, J., Park, S. and Kang, D., "A Study on Affective Engineering Approach for Automotive Interior Design", Proceedings of the Fall Conference on Korean Institute of Industrial Engineers (pp. 124-127), Pohang. KOR., 1997.
  8. Jung, E.S., "Development of touch/visual luxury quantification technique", Final Report of the HYUNDAI NGV, 2014.
  9. Kim, K. and Park, P., "A Proposal of the Luxuriousness Model for the Large Sedan through a Case Study", Proceedings of the Fall Conference on Korean Institute of Industrial Engineers (pp. 79-82), Jeju. KOR., 2014.
  10. Kim, W., Ryu, T., Lee, Y., Park, D. and Yun, M.H., 2C2-2 Modelling of the Auditory Satisfaction Function for the Automobile Door Opening Quality, The Japanese Journal of Ergonomics, 51(Supplement), S478-S483, 2015. https://doi.org/10.5100/jje.51.S478
  11. Kuwano, S., Fastl, H., Namba, S., Nakamura, S. and Uchida, H., Quality of door sounds of passenger cars. Acoustical Science and Technology, 27(5), 309, 2006. https://doi.org/10.1250/ast.27.309
  12. Lee, I., Chung, M. and Kee, D., Evaluation of postural load of varying leg postures using the psychophysical scaling, Journal of the Ergonomics Society of Korea, 21(4), 47-65, 2002.
  13. Lee, G., Yu, J., Park, J., Jung, E.S., Choi, J. and Lee, K., "A study on extraction of visual, tactile design parameter for improving the emotional quality about internal parts of the vehicle", Proceedings of the Fall Conference on Korean Institute of Industrial Engineers (pp. 493-497), Suwon. KOR., 2013.
  14. Lee, J., Nam, S., Ha, T. and Kim, S., Assessment of Emotional Image concerning Color composition of crash pad and door trim in the Automobile Interior, Journal of Korea Society of Color Studies, 26(4), 133-141, 2012. https://doi.org/10.17289/jkscs.26.4.201211.133
  15. Moon, Y., Lee, D., Shin, D. and Ko, J., "Quantitative Study of the Perceived Quality for Automobile Interior Function Parts", Proceedings of Fall Conference of the Korean Society of Automotive Engineers (pp. 2515-2522), Goyang. KOR., 2012.
  16. Myers, R.H., Classical and Modern Regression with Applications, 2nd ed., Duxbury Press, 1990.
  17. Parizet, E., Guyader, E. and Nosulenko, V., Analysis of car door closing sound quality, Applied Acoustics, 69(1), 12-22, 2008. https://doi.org/10.1016/j.apacoust.2006.09.004
  18. Park, J., Park, K., Yu, J., Choe, J. and Jung, E.S., "Effects on the Tactile Affections of Touch Behaviors and Materials of Vehicle Interior", Proceedings of the Fall Conference on Ergonomics Society of Korea (pp. 42-46), Jeju. KOR., 2013.
  19. Park, K., Park, J., Kim, S., Choe, J. and Jung, E.S., Affective Evaluation of Interior Design of Commercial Cars using 3D Images, Journal of the Ergonomics Society of Korea, 33(6), 515-532, 2014. https://doi.org/10.5143/JESK.2014.33.6.515
  20. Park, N.C. and Jeong, S.W., Extraction of Representative Emotions for Evaluations of Tactile Impressions in a Car Interior. Korean Journal of the Science of Emotion and Sensibility, 16(2), 157-166, 2013.
  21. Park, S., Park, J. and Choe, J., Derivation of affective factors for automotive interior material and its association analysis on material properties, Journal of the Korean Society for Quality Management, 45(3), 521-532, 2017. https://doi.org/10.7469/JKSQM.2017.45.3.521
  22. Williams, E.J., Experimental designs balanced for the estimation of residual effects of treatments, Australian Journal of Chemistry, 2(2), 149-168, 1949. https://doi.org/10.1071/CH9490149
  23. Yang, E., Ahn, H.J., Kim, N.H., Jung, H.S., Kim, K.R. and Hwang, W., Perceived Interior Space of Motor Vehicles based on Illusory Design Elements, Human Factors and Ergonomics in Manufacturing & Service Industries, 25(5), 573-584, 2015. https://doi.org/10.1002/hfm.20576
  24. You, H., Ryu, T., Oh, K., Yun, M.H. and Kim, K.J., Development of Satisfaction Models for Passenger Car Interior Materials Considering Statistical, Technical, and Practical Aspects of Design Variables, IE Interfaces, 17(4), 482-489, 2004.
  25. You, H., Ryu, T., Oh, K., Yun, M.H. and Kim, K.J., Development of customer satisfaction models for automotive interior materials, International Journal of Industrial Ergonomics, 36(4), 323-330, 2006. https://doi.org/10.1016/j.ergon.2005.12.007
  26. Yun, M.H., You, H., Geum, W. and Kong, D., "Affective evaluation of vehicle interior craftsmanship: systematic checklists for touch/feel quality of surface-covering material", Proceedings of the Human Factors and Ergonomics Society Annual Meeting (Vol. 48, No. 6, pp. 971-975). Santa Monica, CA. USA., 2004.