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Four Wheel Steering: Maneuverability and High Speed Stabilization
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English
Abstract
A theoretical analysis of four-wheel-steering (4WS) cars is presented. A discussion of low speed maneuvering shows why significant improvements in parallel parking cannot be expected. Using the classical two degree-of-freedom “bicycle model” of the automobile, comparisons of highway maneuverability are made between 4WS and FWS (front-wheel steering) cars. The 4WS lateral response has less phase lag, which permits rapid lane changes with less high frequency motion of the steering wheel. In addition, 4WS vehicles can make more efficient use of tires during transient maneuvers. An extended mathematical model which treats steer angle as a degree of freedom shows that a free control FWS mode is stabilized by either of two 4WS mechanisms considered. This weave oscillation can be excited by a rapid application of steering torque, so moderating the resonance with 4WS probably helps drivers maintain control during emergency maneuvers.
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Citation
Whitehead, J., "Four Wheel Steering: Maneuverability and High Speed Stabilization," SAE Technical Paper 880642, 1988, https://doi.org/10.4271/880642.Also In
References
- Milliken, William F. Whitcomb David W, General Introduction to a Programme of Dynamic Research IMechE Proceedings of the Automobile Division No. 7 287 309 1956–57
- Segel, Leonard Theoretical Prediction and Experimental Substantiation of the Response of the Automobile to Steering Control IMechE Proceedings of the Automobile Division No. 7, 310–330 1956–57
- Takiguchi, Tadahiko Yasuda Noritaka Furutani Shigeki Kanazawa Hirotaka Inoue Hitoshi Improvement of Vehicle Dynamics by Vehicie-Speed-Sensing Four-Wheel Steering System SAE 860624 1986
- Sato, H. Hiroto, A. Yanagisawa, H. Fukushima T. Dynamic Characteristics of a Whole Wheel Steering Vehicle with Yaw Velocity Feedback Rear Wheel Steering IMechE C124/83 Road Vehicle Handling 146 156 1983
- Furukawa, Yoshimi, Nakaya H. Effects of Steering Response Characteristics on Control Performance of the Driver-Vehicle System International Journal of Vehicle Design 262 268 1986
- Weir, David H. McRuer Duane T. A Theory for Driver Steering Control of Motor Vehicles Highway Research Record No. 247 7 28 1968
- McRuer, Duane T. Weir David H. Jex Henry R. Magdaleno Raymond E. Allen R. Wade Measurement of Driver-Vehicle Multiloop Response Properties with a Single Disturbance Input IEEE Transactions on Systems, Man, and Cybernetics SMC-5 490 497 1975
- McLean, John R. Hoffmann Errol R. The Effects of Restricted Preview on Driver Steering Control and Performance Human Factors 15 4 421 430 1973
- Maeda, Teruo Irie Namio Irie Kunihiko Nishimura Hiroaki Performance of Driver-Vehicle System in Emergency Avoidance. SAE 770130 1977
- Sano, Shoichi Furukawa Yoshimi Shiraishi Shuji Four Wheel Steering System with Rear Wheel Steer Angle Controlled as a Function of Steering Wheel Angle SAE 860625 1986
- Segel, L. An Investigation of Automobile Handling as Implemented by a Variable-Steering Automobile Human Factors 6 4 333 341 1964
- Repa, B. S. Alexandridis, A. A. Howell, L. J. Wierwille W. W. The Influence of Vehicle Control Dynamics on Driver-Vehicle Performance Proceedings of the 5th IAVSD Symposium on Dynamics of Vehicles on Roads and on Railway Tracks 1977
- Segel, L. On the Lateral Stability and Control of the Automobile as Influenced by the Dynamics of the Steering System ASME 65-WA/MD-2 1965
- Hoffmann, Errol R. Human Control of Road Vehicles Vehicle System Dynamics 5 105 126 1975–76
- Good, Malcolm C. Sensitivity of Driver-Vehicle Performance to Vehicle Characteristics Revealed in Open-Loop Tests Vehicle System Dynamics 6 245 277 1977
- Systems Control Technology Inc Control-C Version 3.0 1983
- Honda Prelude 2.0 Si Road Test Road and Track 54–58 August 1987