An Online Estimation Method of Stability Factor of a Vehicle for Steering

2009-01-0045

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
In this paper, we suggest a novel algorithm to distinguish semi-steady states from various steering patterns and to estimate the stability factor. The algorithm also estimates each stability factor in left and right turns because there could be a case where they differ based on uneven tire wear and so on. The stability factor, which is the turning characteristic of a vehicle, has been treated as constant for most vehicle control systems. However, in fact, it may change in some situations, for example when a vehicle is overloaded. So there is a chance that a driver may be aware of an unusual sensation when vehicle control is designed based on a constant stability factor. We have succeeded in developing an algorithm to estimate the stability factor accurately enough to be able to compensate for it and have confirmed the effectiveness of the algorithm by simulation and vehicle testing as well. The algorithm can be applied to lateral vehicle controls with electronic stability control (ESC) or other devices. The goal of this algorithm is to control vehicle dynamics appropriately when changes in the stability factor occur.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0045
Pages
6
Citation
Kitano, H., Kurishige, M., and Matsunaga, T., "An Online Estimation Method of Stability Factor of a Vehicle for Steering," SAE Technical Paper 2009-01-0045, 2009, https://doi.org/10.4271/2009-01-0045.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0045
Content Type
Technical Paper
Language
English