This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Experimental Procedure for Estimating Ride Quality for Passive and Semi-Active Suspension Automobiles
Annotation ability available
Sector:
Language:
English
Abstract
This paper investigates the ride comfort provided by cars equipped with passive and semi-active suspension systems. This investigation is part of a feasibility study for a high speed freeway system for the State of Texas that is proposed for the year 2020.
The investigation described in this paper tested two automobiles, one with a passive suspension and one with a semi-active suspension at speeds from 30 mph to 80 mph. The two cars were identical in all other operational aspects except their suspensions. The tests determined the magnitudes of the linear accelerations of the automobiles' front passenger seat for the various testing speeds. These accelerations were converted into a form which could be compared to the International Organization for Standardization (ISO) standards pertaining to the relationship between these accelerations and rider comfort. The ride comfort at 150 mph was predicted from extrapolation of the test data.
The results of the investigation showed that the semi-active suspension system did decrease the accelerations transmitted to the passenger, thus providing increased rider comfort. However, this increased rider comfort was modest and it was determined that the ride-comfort-limiting accelerations occurred in the frequency band corresponding to the natural frequency of the automobile body including suspensions, and the natural frequency of the automobile's tires. The investigation also determined that road conditions are an important factor affecting rider comfort even when the automobile is equipped with a semi-active suspension.
Recommended Content
Authors
- Timothy L. Brown - The University of Texas At Austin
- Steven T. Mear - The University of Texas At Austin
- Nathan E. Moore - The University of Texas At Austin
- Srikanth M. Kannapan - The University of Texas At Austin
- Kurt M. Marshek - The University of Texas At Austin
- Jerry Cuderman - The University of Texas At Austin
- Keyanoush Efatpenah - The University of Texas At Austin
Citation
Brown, T., Mear, S., Moore, N., Kannapan, S. et al., "An Experimental Procedure for Estimating Ride Quality for Passive and Semi-Active Suspension Automobiles," SAE Technical Paper 922141, 1992, https://doi.org/10.4271/922141.Also In
References
- Brown, T. L. Mear S. T. Moore N. E. “Experimental and Theoretical Ride Quality Predictions for High Speed Automobile Travel Based on Passive and Semi-Active Suspension System Dynamics“ Mechanical Engineering Department Technical Report The University of Texas at Austin Austin, Texas Spring 1990
- “Transportation 2020,” Texas Transportation Researcher 24 1 1 March 1988
- “SAE J1060: Subjective Rating Scale for Evaluation of Noise and Ride Comfort Characteristics Related to Motor Vehicles” SAE J1060, SAE Recommended Practice Society for Automotive Engineers 1971
- “Evaluation of Human Exposure to Whole-body Vibration - Part 1: General Requirements“ International Organization for Standardization, ISO 2631/1 1985
- “Evaluation of Human Exposure to Whole-body Vibration - Part 3: Evaluation of Exposure to Whole-body Z-axis Vertical Vibration in the Frequency Range 0.1 to 0.63 Hz” International Organization for Standardization, ISO 2631/3 1985
- Cartwright, A. J. “The Development of a High Comfort, High Stability Rear Suspension” Proc. Institution of Mechanical Engineers 200 D5 S53 S60 1986
- Darling, J. Dorey R. E. Ross-Martin T. J. “A Low Cost Active Anti-Roll Suspension for Passenger Cars” Paper 90-WA/FPST-8, ASME Winter Annual Meeting Dallas, Texas Nov. 25-30 1990
- Sharp, R. S. Crolla D. A. “Road Vehicle Suspension System Design - A Review” Vehicle System Dynamics 16 167 192 1987
- Sharp, R. S. Hassan S. A. “The Relative Performance Capabilities of Passive, Active and Semi-Active Car Suspension Systems” Proc. of the Institution of Engineers 200 D3 219 228 1986
- “Mercedes Benz 300E,” Consumer Guide Auto Test: Auto Series 21 April 1987 54
- Hac, A. “Adaptive Control of Vehicle Suspension” Vehicle System Dynamics 16 57 64 1987
- Yue, C. Butsuen, T. Hedrick, J.K. “Alternative Control Laws For Automotive Active Suspensions,” SAE Transactions 1987 2373 2378
- “Fully Active Suspension: Still Too Pricy,” Automotive Electronics Journal 2 5 26 February 1990 1 30
- Mastinu, G. “Passive Automobile Suspension Parameter Adaptation” Proc. Institution of Mechanical Engineers C425/88 51 58 1988
- Karnopp, D. C. Crosby M. J. Harwood R. A. “Vibration Control Using Semi-Active Force Generators” J. of Engineering for Industry 96 619 626 1974
- Karnopp, D. “Active Damping in Road Vehicle Suspension Systems,” Vehicle System Dynamics 12 1983 291 316
- Barak, P. Sachs H. “On the Optimal Ride Control of a Dynamic Model for an Automotive Vehicle System” The Dynamics of Vehicles on Roads and on Tracks 15 29 1983
- Bertrand Carl The University of Texas at Austin/The Center for Transportation Research (Austin, TX: 1 March 1990)
- Kuroki J. Sugasawa F. “Vehicular Suspension Control System with Variable Damping Characteristics Depending upon Road Condition and Vehicle Speed” Feb. 27 1985
- Sharp, R. S. Hassan, J. H. “Performance Predictions for a Pneumatic Active Car Suspension System,” Proceedings from the Institution of Mechanical Engineers 202 D4 243 250 1988