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Influence of Active Suspension Preview Control on the Vehicle Lateral Dynamics
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 15, 2007 by SAE International in United States
Annotation ability available
The dynamics of vehicles became one of the most important aspects for current developments of electronically controlled steering, suspension and traction/braking systems. However, most of the published research on vehicle maneuverability doesn't take into account the effect of the dynamic tire load and its variation on uneven roads.
Clearly, it was stated that using a suitable active suspension system could reduce this dynamic tire load. This dynamic tire load is playing a vital role as it is the major link between the vertical and lateral forces exerted on the road, which affects the lateral dynamics of the vehicle.
In this paper, a practical hydro-pneumatic limited bandwidth active suspension system with and without wheelbase preview control is used to study its influence on the vehicle stability in lateral direction. The model is a longitudinal half car with four degrees of freedom. Vehicle lateral dynamics is modeled as a two degrees (yaw and side slip) bicycle model and a driver model. The controllable suspension system is deigned based on linear optimal control theory using LQR control technique with front to rear axle preview is taken into account. The interaction between the performance of active suspension and vehicle lateral dynamics is studied through a non-linear Magic Formula tire model.
The results are generated in the time domain to simulate the vehicle response in handling maneuvers while road wheels are subjected to vertical road input. Comparisons between passive and active suspension are discussed as well as correlated and uncorrelated active suspension systems. The improvement of active suspension on maneuverability and stability is shown.
CitationOraby, W., Aly, M., El-Demerdash, S., and Selim, A., "Influence of Active Suspension Preview Control on the Vehicle Lateral Dynamics," SAE Technical Paper 2007-01-2347, 2007, https://doi.org/10.4271/2007-01-2347.
- Cho Young H. and Kim J., Stability Analysis of the Human Control Vehicle Moving Along a Curved Path, Vehicle System Dynamics. Vol. 25, 1996.
- Cho Young H. and Kim J., Design of Optimal Four-Wheel Steering System, Vehicle System Dynamics. Vol. 24, 1995.
- Demerly Jon D. and Youcef-Toumi Kamal, Non-Linear Analysis of Vehicle Dynamics (NAVDyn): A Reduced Order Model for Vehicle Handling Analysis, SAE paper no. 2000-01-1621, 2000.
- Harada Masanori and Harada Hiroshi, Analysis of lateral stability with integrated control of suspension and steering systems, JSAE, 1999.
- Pascali, L.; Gabrielli, P. and Caviasso, G.; Improving Vehicle Handling and Comfort Performance Using 4WS, SAE paper no. 2003-01-0961, 2003.
- HANAMURA Yoshifumi, ARAKI Yoshiaki, OYA Masahiro and HARADA Hiroshi, Control of Maneuverability and Stability as well as Ride Comfort by Active Suspension Control with Additional Vertical Load Control, AVEC 98, 1998.
- Furukawa Yoshimi, Yuhara Naohiro, Sano Shoichi, Takeda Hideo and Matsushita Yoshinobu, A Review of Four-Wheel Steering Studies from the Viewpoint of Vehicle Dynamics and Control, Vehicle System Dynamics, Vol. 18, 1989.
- Bakker Egbert; Pacejka Hans B. and Lidner Lars, A New Tire Model with an Application in Vehicle Dynamics Studies, Auto Technologies Conference and Exposition Monte Carlo, Monaco, 1989.
- El-Demerdash, S.M.; Performance of Limited Bandwidth Active Suspension Based on Half Car Model, SAE paper no. 981118,1998.
- El-Demerdash, S.M.; Selim, A.M. and Crolla, D.A.; Vehicle Body Attitude Control Using an Electronically Controlled Active Suspension Based, SAE paper no. 1999-01-0724, 1999.