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Improving vehicle dynamics by active rear wheel steering systems

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Abstract:

This article presents two design strategies for an active rear wheel steering control system. The first method is a standard design procedure based on the well-known single track model. The aim of the feedback loop is to track a reference yaw rate in order to improve the handling behaviour. Unfortunately, a reasonable specification of the reference yaw rate proves to be a nontrivial task. A second approach avoids this drawback. The structure of the controller is regarded as a virtual mass-spring-damper system with adjustable parameters. Due to the high abstraction level of this method, the controller parameters can be tuned intuitively. Experiments with a prototype vehicle illustrate the effectiveness of the two proposed methodologies.

Keywords: active rear wheel steering; model based design; road holding ability; vehicle dynamics

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/00423110802691507

Affiliations: 1: Institute for Automation and Control, Graz University of Technology, Graz, Austria 2: Institute for Smart System Technologies, Klagenfurt University, Klagenfurt, Austria 3: AVL List GmbH, Graz, Austria

Publication date: December 1, 2009

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