A nonlinear post impact path controller based on optimised brake sequences

Yang, D. and Gordon, T. J. and Jacobson, B. and Jonasson, M. (2012) A nonlinear post impact path controller based on optimised brake sequences. Vehicle System Dynamics, 50 (SUPPL.). pp. 131-149. ISSN 0042-3114

Full content URL: http://dx.doi.org/10.1080/00423114.2012.660490

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Item Type:Article
Item Status:Live Archive

Abstract

This paper investigates brake-based path control of a passenger vehicle, aimed at reducing secondary collision risk following an initial impact in a traffic accident. Previous results from numerical optimisation showed that, at varying severity levels of post-impact states, there exist three identifiable components within the optimal control strategy so as to reduce the lateral deviation. The paper presents a path controller, based on nonlinear optimal control theory, that incorporates the three components. It is shown that friction adaptation may be implemented in a very efficient manner; the controller deals with different levels of road friction by scaling the dynamic variables from a fixed reference level. The approach provides an algorithm for adapting switching thresholds between the different components of the controller. In this study it is verified that the controller can deal with a wide range of kinematic conditions, and compares favorably with previous results of open-loop trajectory optimisation. © 2012 Copyright Taylor and Francis Group, LLC.

Additional Information:Published online: 16 Jul 2012
Keywords:Collision risks, Dynamic variables, Kinematic condition, Lateral deviation, Non-linear optimal control, Open loops, Optimal control strategy, Optimisations, Passenger vehicles, Path control, post impact, Reference levels, Road friction, Switching thresholds, Three component, Vehicle dynamics, Accidents, Collision avoidance, Control, Friction, Machine tools, Optimal control systems, Optimization, Tribology, Brakes
Subjects:H Engineering > H660 Control Systems
H Engineering > H330 Automotive Engineering
Divisions:College of Science > School of Engineering
ID Code:11651
Deposited On:01 Oct 2013 17:51

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