This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis of Non-Steady State Tire Cornering Properties Based on String-Concept Deformation and Geometric Relationship of Contact Patch
Technical Paper
2007-01-1514
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Vehicle handling and stability performances are greatly determined by non-steady state (NSS) tire cornering properties. Analytical derivation of NSS tire cornering models are presented in this paper based on Pacejka's string-concept assumption, in which carcass is assumed to be a stretched string with lateral deformation and lateral relaxation. The lateral inputs of the models are either displacement-based (lateral displacement and yaw angle) or slip-based (slip angle and turn slip). The transient deformations in spatial domain in both longitudinal and lateral directions are obtained directly from geometric relationship of contact patch. The additional self-aligning moment due to longitudinal deformation of contact patch after effect of tire width is considered is also achieved according to geometric relationship of contact patch in longitudinal direction and two transient geometric conditions of contact point. The presented analytical method is significantly different from and is regarded to be much simpler than that of Pacejka's although both derived models are consistent. The model derived by Pacejka is originally based on slip velocity of contact center and sliding velocity components (longitudinal and lateral) of contact point. Non-dimensional simplification of the NSS models and frequency responses (Bode plots) at different model parameters are presented in this paper.
Recommended Content
Authors
Topic
Citation
Liu, Q., Lee, J., and Guo, K., "Analysis of Non-Steady State Tire Cornering Properties Based on String-Concept Deformation and Geometric Relationship of Contact Patch," SAE Technical Paper 2007-01-1514, 2007, https://doi.org/10.4271/2007-01-1514.Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- Pacejka H. B. “Analysis of tire properties” Mechanics of Pneumatic Tires Clark S. K. Washington D. C. 1981
- Pacejka H. B. “In-plane and out-of-plane dynamics of pneumatic tyres” Vehicle System Dynamics 10 4/5 1981
- Pacejka H. B. “ Tyre and Vehicle Dynamics, ” Elsevier Butterworth-Heinemann 2002
- Barson C. W. Osborne D. J. “Dynamic properties of tyres” IMechE Conference Automobile Wheels and Tyres, C277/83 1983
- Sakai H. “ Tire Mechanics ” (in Japanese), Tokyo Guranbury Press Co. Ltd. 1987
- Guo K. Liu Q. “Modeling and simulation non-steady state cornering properties and identification of structure parameters of tyres” Vehicle System Dynamics 27 1997 80 93
- Liu Q. Guo K. “Analysis of automotive handling based on tire cornering properties in non steady state conditions” SAE Transactions 108 2 1999 638 644
- Guo K. Liu Q. “Influences of non-steady state tire cornering properties on automobile shimmy” SAE Technical Papers , 1999-01-3757, SAE International Truck and Bus Meeting Detroit 1999
- Liu Q. Lee J. “Time-dependent tire-snow modeling for two-dimensional slip conditions” SAE Transactions 115 2006-01-1168, SAE 2006 World Congress, Military Vehicle Modeling and Simulation Session Detroit 2006