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

Document Number: 2009-01-0045

Date Published: April 2009

Author(s):
Hiroaki Kitano - Mitsubishi Electric Corp.
Masahiko Kurishige - Mitsubishi Electric Corp.
Takanori Matsunaga - Mitsubishi Electric Corp.

Abstract:
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.

File Size: 133K
Product Status: In Stock

See other papers presented at SAE World Congress & Exhibition, April 2009, Detroit, MI, USA, Session: Steering and Suspension Technology Symposium: (Part 1 of 2) Steering

Purchase more technical papers and save! With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay. Learn more >