Citation

Jamson AH, Whiffin PG, Burchill PM. Int. J. Veh. Des. 2007; 45(3): 361-378.

Copyright

(Copyright © 2007, Inderscience Publishers)

DOI

10.1504/IJVD.2007.014910

PMID

unavailable

Abstract

Active Front Steer (AFS) is a variable gain steering system that can be a useful driver aid: less wheel input is required to steer at low speeds than a more traditional fixed-gain (FG) system. However, should an AFS system fail, the sudden change in steering gain is potentially hazardous. Using a fully-immersive simulator, forty drivers participated in this single-blind study which compared driver response to both operational and failed AFS compared to a FG system with both functional and failed power steering. At low speeds, whilst negotiating an intersection, drivers rated AFS higher than FG for ease of steering. There were also trends suggesting that AFS failure was easier for drivers to control than the loss of power-assist to the FG system. At high speeds, AFS also showed advantages: drivers rated AFS higher and demonstrated fewer steering micro-corrections, intimating that maintaining control of the vehicle was less demanding with AFS.