Optimized brake-based control of path lateral deviation for mitigation of secondary collisions

Yang, D. and Gordon, T. J. and Jacobson, B. and Jonasson, M. and Lidberg, M. (2011) Optimized brake-based control of path lateral deviation for mitigation of secondary collisions. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 225 (12). pp. 1587-1604. ISSN 0954-4070

Full content URL: http://dx.doi.org/10.1177/0954407011412856

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Item Type:Article
Item Status:Live Archive

Abstract

This paper considers brake-based lateral control of a passenger vehicle, for reducing secondary collision risk following an initial impact in a traffic accident. Since secondary collisions are associated with deviations from the original travel path, the control problem is formulated via brake control sequences that minimize lateral path deviation. Optimal sequences are found not to conform to any simple control mode; sometimes all brakes are released, sometimes all wheels are locked, or the brakes may be applied in differential mode. In general, the optimal strategy combines several such actuation modes, and analysis shows it is related to the utilization of instantaneous vehicle force and moment capacity, indicating that a closed-loop control strategy may be developed based on the real-time estimation of tyre force limits during the post-impact event. Yaw motion control is related to response discontinuity and multiple equilibria found in the optimal response - a small change in initial yaw velocity generates large changes in the ensuing vehicle motion and thus in the aimed equilibrium point of the vehicle's orientation. Overall it is found that braking control strongly influences the post-impact path of the impacted vehicle, and may therefore form the basis of a practical system for avoiding secondary collisions in future traffic accidents. © Authors 2011.

Additional Information:Published online before print September 13, 2011
Keywords:Active safety, Brake control, Braking control, Closed-loop control, Collision risks, Control modes, Control problems, Differential mode, Equilibrium point, Lateral control, Lateral deviation, Moment capacity, Multiple equilibrium, Optimal response, Optimal sequence, Optimal strategies, Passenger vehicles, Path control, Post-impact, Practical systems, Real-time estimation, Tyre forces, Vehicle dynamics, Vehicle forces, Vehicle motion, Yaw velocity, Brakes, Collision avoidance, Friction materials, Highway accidents, Optimization, Vehicles, Braking
Subjects:H Engineering > H660 Control Systems
H Engineering > H330 Automotive Engineering
Divisions:College of Science > School of Engineering
ID Code:11654
Deposited On:01 Oct 2013 17:34

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