Sliding mode measurement feedback control for antilock braking systems

• Published in: IEEE transactions on control systems technology 1999-03, Vol.7 (2), p.271-281
• Main Authors: Unsal, C., Kachroo, P.
• Format: Article
• Language: English
• Subjects: Applied sciences; Automotive wheels; Computer science; control theory; systems; Computer simulation; Control system synthesis; Control theory. Systems; Exact sciences and technology; Extended Kalman filter; Feedback control; Mathematical models; Motion control; Nonlinearity; Observers; Robust control; Sliding mode control; State estimation; State feedback; Traction; Vehicle safety; Vehicles; Wheels
• ISSN: 1063-6536; 1558-0865
• DOI: 10.1109/87.748153

We describe a nonlinear observer-based design for control of vehicle traction that is important in providing safety and obtaining desired longitudinal vehicle motion. First, a robust sliding mode controller is designed to maintain the wheel slip at any given value. Simulations show that longitudinal traction controller is capable of controlling the vehicle with parameter deviations and disturbances. The direct state feedback is then replaced with nonlinear observers to estimate the vehicle velocity from the output of the system (i.e., wheel velocity). The nonlinear model of the system is shown locally observable. The effects and drawbacks of the extended Kalman filters and sliding observers are shown via simulations. The sliding observer is found promising while the extended Kalman filter is unsatisfactory due to unpredictable changes in the road conditions.