Ride Quality Investigation of Passenger Cars on Different Road Conditions

다국어 초록 (Multilingual Abstract)

Objective: The ride qualities of the six passenger cars were evaluated in 4 subjects on the highway and uneven road. The relation between vibration with driving velocity and driving posture were also investigated separately. Background: Ride comfort plays an important role in the vehicle design. Vibration is the one of the principal components associated with ride comfort. Method: The acceleration of the foot, hip and back were measured using B&K accelerometers in this study. The velocity of the passenger cars was maintained at a constant speed of 80km/h on the highway and 40km/h on the uneven road. For evaluating the effects of driving velocity and driving posture on vehicle"s vibration level, separate experiments were performed on the highway with 5 different vehicle speeds and 5 different backrest angles, respectively. Results: The overall ride value of the luxury car showed the best result while the smaller car showed the worst value on the highway. On the uneven road the overall ride value level was increased 75~98%. All the vehicles had the SEAT value less than 1. Faster the velocity lowers the SEAT value. The ride quality in terms of vibration gets worst when the backrest angle increased. Conclusion: The smaller car had a first mode at the higher frequency and showed higher vibration level. SEAT value was mostly affected by the seat property not by vehicle. We ranked the luxury car seat had a best vibration reduction quality than others based on SEAT values. When the driving velocity increased, the overall ride values were increased proportionally and the SEAT values were somewhat decreased. Application: Evaluation of whole-body vibration in the passenger car.

목차 (Table of Contents)

• ABSTRACT
• 1. Introduction
• 2. Method
• 3. Results
• 4. Discussion
• 5. Conclusion
• References

참고문헌 (Reference)

1 Necking, L.E., "Vibration induced muscle injury" 17B (17B): 270-274, 1992

2 Pardko, F., "Vibration Comfort Criteria" 1966

3 Wambold, J.C., "Vehicle Ride Quality Measurement and Analysis" 1986

4 Niekerk J.L., "The use of seat effective amplitude transmissibility (SEAT) values to predict dynamic seat comfort" 260 (260): 867-888, 2003

5 Dupius, H., "The effects of whole-body vibration" Springer-Verlag 1986

6 Meier, R.C., "The Ford vehicle vibration simulator for subjective testing" 26-32, 1998

7 Park, S.J., "The Evaluation of Seating Comfort by the Objective Measures" 1997

8 Lin, K.Y., "System Dynamics and Ride Quality Assessment of Automobile" 2006

9 Park, S.J., "Seating physical characteristics and subjective comfort: Design considerations" 1998

10 Berger, E., "Seat Dynamic Parameters for Ride Quality" 1993

11 Amirouche, F.M., "Optimization of the Contact Damping and Stiffness Coefficients to Minimize Human Body Vibration" 116 (116): 413-420, 1994

12 Parsons, K.C., "Methods for Predicting Passenger Vibration Discomfort" 1983

13 International Organization for Standardization, "Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration"

14 British Standards Institution, "Measurement and evaluation of human exposure to whole-body mechanical vibration and repeated shock"

15 Griffin, M.J., "Handbook of Human Vibration" Academic Press 1990

16 Valasek, M., "Experimental verification of correlation between objective and subjective of passenger car vibration comfort" 4 (4): 99-101, 2008

17 Nahvi, H., "Evaluation of whole-body vibration and ride comfort in a passenger car" 14 (14): 143-149, 2009

18 Fouladi, M.H., "Evaluation of seat vibration sources in driving condition using spectral analysis" 6 (6): 339-356, 2011

19 Nahvi, H., "Evaluating Automobile Road Vibrations Using BS 6841 and ISO 2631 Comfort Criteria" 2006

20 McLain, R.F., "Effects of whole body vibration on dorsal root ganglion neurons" 19 (19): 1455-1461, 1994

21 Paddan, G.S., "Effects of seating on exposures to wholebody vibrations in vehicles" 253 (253): 215-241, 2002

22 Park, S.J., "Dynamic Ride Quality Investigation for Passenger Car" 1998

23 Kim, T. H., "Dynamic Ride Quality Investigation and DB of Ride Values for Passenger and RV Cars" 2001

24 Troup, J.D., "Drivers back pain and its prevention" 9 (9): 207-214, 1978

25 Park, S.J., "Development of the Evaluating System for Ride Comfort and Fatigue in Vehicle" 2001

26 Staszewski, W.J., "Application of the wavelet based FRF's to the analysis of non-stationary vehicle vibration" 1997

27 Giacomin, J., "An experimental approach for the vibration optimisation of automotive seats" 1995

28 Kelsey, J.L., "An epidemiological study of the relationship between occupations and acute herniated lumbar intervertebral discs" 4 (4): 197-205, 1975

29 Reed, M.P., "An Investigation of Driver Discomfort and Related Seat Design Factors in Extended Driving" 1991

30 Griffin, M.J., "A comparison of standardized methods for predicting the hazards of Whole-body vibration and shocks" 215 (215): 883-914, 1998