This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Steering Control for Roll Mode Damping Augmentation in Tall Road Vehicles
Annotation ability available
Sector:
Language:
English
Abstract
High center of gravity vehicles need to be stiff in roll to prevent excessive roll angles when cornering. In some cases, there may be more roll compliance in the tires than in the suspension itself. For this reason, the conventional shock absorbers may not provide effective damping of the roll mode. The result is that wind gust and roadway unevenness disturbances can cause large swaying oscillations. Here a novel use of automatically steered wheel is proposed to augment the damping of the roll mode. Either the front wheels, the rear wheels or both can be steered using a simple feedback scheme using sensed roll rate. The scheme is effective in specific speed ranges and stabilizes the roll mode without introducing disturbance moments from roadway unevenness as shock absorbers do. There is a theoretical advantage to coordinated steering of both front and rear wheels but this level of complexity may not be practically justified. Numerical examples verify the analytical asymptotic results and demonstrate the increased damping possible using simple steering control schemes.
Recommended Content
Technical Paper | Passenger Car Stability Under Random Wind Excitation |
Technical Paper | Hybrid Electric Vehicle Development at the University of California, Davis: The Design of Ground FX |
Technical Paper | Suspension Design for Optimum Road-Holding |
Authors
Citation
Karnopp, D. and Hibbard, R., "Steering Control for Roll Mode Damping Augmentation in Tall Road Vehicles," SAE Technical Paper 932947, 1993, https://doi.org/10.4271/932947.Also In
References
- Karnopp, D. 1989 “Design Principles for Vibration Control Systems Using Semi-Active Dampers” Trans. ASME Journal of Dynamic Systems, Measurement and Control
- Ellis, J. R. 1969 Vehicle Dynamics London Business Books Ltd. London