Abstract
Idle vibration, occurring when a vehicle comes to a stop while the engine is on, is known to be a main cause of discomfort for passengers, and the customer effect has been recently growing. The frequency of idle vibration is determined by the engine type. To lower the vibration, various technologies have been applied to optimize the engine mount and vehicle body structure. In addition to the technological developments, research on human response with a consideration of idle vibration is needed to effectively reduce the level of discomfort experienced by passengers. Seats aimed at enhancing static comfort influence the sitting posture of passengers; sitting posture is a factor affecting human body characteristics that response to idle vibration. This study examined the absolute discomfort threshold of idle vibration according to the sitting postures of 13 taxi drivers. The four sitting postures of subjects on a rigid-body seat without a backrest were variables in the determination of absolute discomfort threshold of idle vibration. The absolute discomfort threshold curves obtained in this experiment were less sensitive to frequency changes than the frequency weighting function of ISO 2631-1.
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References
Ahn, S. J. (2010). Discomfort of vertical whole-body shock-type vibration in the frequency range of 0.5 to 16 Hz. Int. J. Automotive Technology 11, 6, 909–916.
Basri, B. and Griffin, M. J. (2014). The application of SEAT values for predicting how compliant seats with backrests influence vibration discomfort. Applied Ergonomics 45, 6, 1461–1474.
Balla, C., Naidu, S. and Ambardekar, M. (2015). Reduction of idle shake in a small commercial vehicle. SAE Paper No. 2015-01-2352.
BS 6841 (1987). Measurement and Evaluation of Human Exposure to Whole-body Mechanical Vibration and Repeated Shock. British Standard. UK.
Dixon, W. J. and Mood, A. M. (1948). A method for obtaining and analyzing sensitivity data. J. American Statistical Association 43, 241, 109–126.
Gil Gómez, G., Nybacka, M., Bakker, E. and Drugge, L. (2016). Objective metrics for vehicle handling and steering and their correlations with subjective assessments. Int. J. Automotive Technology 17, 5, 777–794.
Griffin, M. J. (1975). Vertical vibration of seated subjects: effects of posture, vibration level, and frequency. Aviation, Space, and Environmental Medicine 46, 3, 269–276.
Griffin, M. J. (1990). Handbook of Human Vibration. Elsevier Academic Press. London, UK.
ISO 13091-1 (2001). Mechanical Vibration–Vibrotactile Perception Thresholds for the Assessment of Nerve Dysfunction. International Organization for Standardization. Sweden.
ISO 5982 (2001). Mechanical Vibration and Shock–Range of Idealized Values to Characterize Seated-body Biodynamic Response under Vertical Vibration. International Organization for Standardization. Geneva.
ISO 2631-1 (1997). Mechanical Vibration and Shock -Evaluation of Human Exposure to Whole-body Vibration–Part 1: General Requirements. International Organization for Standardization. Geneva.
Jeon, G. J., Kim, M. S., Ahn, S. J., Jeong, W. B. and Yoo, W. S. (2010). Human response to idle vibration of passenger vehicle related to seating posture. Trans. Korean Society for Noise and Vibration Engineering 20, 12, 1121–1127.
Jang, H. K. and Griffin, M. J. (2000). Effect of phase, frequency, magnitude and posture on discomfort associated with differential vertical vibration at the seat and feet. J. Sound and Vibration 229, 2, 273–286.
Huang, Y. and Griffin, M. J. (2014). Comparison of absolute magnitude estimation and relative magnitude estimation for judging the subjective intensity of noise and vibration. Applied Acoustics, 77, 82–88.
Kim, M. S., Jeon, G. J., Lee, J. Y., Ahn, S. J., Yoo, W. S. and Jeong, W. B. (2012). Human response of vertical and pitch motion to vertical vibration on whole body according to sitting posture. J. Mechanical Science and Technology 26, 8, 2477–2484.
Kim, T. H., Kim, Y. T. and Yoon, Y. S. (2005). Development of a biomechanical model of the human body in a sitting posture with vibration transmissibility in the vertical direction. Int. J. Industrial Ergonomics 35, 9, 817–829.
Lerspalungsanti, S., Albers, A., Ott, S. and Düser, T. (2015). Human ride comfort prediction of drive train using modeling method based on artificial neural networks. Int. J. Automotive Technology 16, 1, 153–166.
Mansfield, N. J. and Griffin, M. J. (2000). Difference thresholds for automobile seat vibration. Applied Ergonomics 31, 3, 255–261.
Mansfield, N. J. and Maeda, S. (2006). Comparison of the apparent masses and cross-axis apparent masses of seated human exposed to single and dual-axis wholebody vibration. J. Sound and Vibration 298, 3, 841–853.
Miwa, T. (1967). Evaluation methods for vibration effect, Part 1: Measurements of threshold and equal sensation contours of whole body for vertical and horizontal vibrations. Industrial Health 5, 3–4, 183–205.
Morioka, M. and Griffin, M. J. (2006). Magnitudedependence of equivalent comfort contours for fore-andaft, lateral and vertical whole-body vibration. J. Sound and Vibration 298, 3, 755–772.
Nawayseh, N. and Griffin, M. J. (2003). Non-linear dualaxis biodynamic response to vertical whole-body vibration. J. Sound and Vibration 268, 3, 503–523.
Nawayseh, N. and Griffin, M. J. (2009). A model of the vertical apparent mass and the fore-and-aft cross-axis apparent mass of the human body during vertical wholebody vibration. J. Sound and Vibration 319, 1–2, 719–730.
Nawayseh, N. (2015). Effect of the seating condition on the transmission of vibration through the seat pan and backrest. Int. J. Industrial Ergonomics, 45, 82–90.
Park, S. J., Kim, C. B., Kim, C. J. and Lee, J. W. (2000). Comfortable driving postures for Koreans. Int. J. Industrial Ergonomics 26, 4, 489–497.
Parsons, K. C. and Griffin, M. J. (1988). Whole-body vibration perception thresholds. J. Sound and Vibration 121, 2, 237–258.
Wang, W., Rakheja, S. and Boileau, P.-É. (2004). Effects of sitting postures on biodynamic response of seated occupants under vertical vibration. Int. J. Industrial Ergonomics 34, 4, 289–306.
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Song, J.T., Ahn, S.J., Jeong, W.B. et al. Subjective absolute discomfort threshold due to idle vibration in passenger vehicles according to sitting posture. Int.J Automot. Technol. 18, 293–300 (2017). https://doi.org/10.1007/s12239-017-0029-1
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DOI: https://doi.org/10.1007/s12239-017-0029-1