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Analysis of the properties of a steering shaft used as a back-up for a steer-by-wire system during system failure
Hussain, Khalid Baharom, Masri B. Day, Andrew J.
Hussain, Khalid
Baharom, Masri B.
Day, Andrew J.
Publication Date
2009
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© 2009 IMechE. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
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Accepted for publication
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Abstract
An analysis is presented to determine the best selection criteria for the properties of
a steering shaft to be used as a back-up apparatus for a steer-by-wire (SBW) system during
system failure. The properties of interest are the steering-shaft stiffness and its damping
coefficient. A mathematical model representing the failed state of an SBW system is derived,
and a set of experiments to validate the model is presented. Once the model had been
validated, further predictions of the car¿s handling behaviour for a range of steering-shaft
properties and different road speeds were completed by simulations in MATLAB/Simulink. A
minimum stiffness which did not cause the car to become unstable owing to overshoot was
determined, and the minimum acceptable damping coefficient value was derived. It is
concluded that the suggested stiffness and damping coefficient values increased the steering
ratio, and the results of further investigations are presented, which confirm that the vehicle is
safe to be driven in the event of SBW system failure if the recommended shaft properties are
used.
Version
Published version
Citation
Hussain K, Baharom M and Day AJ (2009) Analysis of the properties of a steering shaft used as a back-up for a steer-by-wire system during system failure. Proceedings of the Institution of Mechanical Engineers. Part D: Journal of Automobile Engineering. 223(2): 177-189.
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Article