On-line estimation of local road gradient for improved steady state suspension deflection control

Fairgrieve, A. and Gordon, Timothy (2000) On-line estimation of local road gradient for improved steady state suspension deflection control. In: 16th IAVSD Symposium: 'The Dynamics of Vehicles on Roads and on Tracks', 30 August - 3 September 1999, Pretoria, South Africa.

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Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive

Abstract

The paper outlines a systematic method for controlling suspension deflection offset and drift, that can arise when an actively sprung vehicle encounters a constant gradient or a long wavelength road surface undulation. A brief review of the problem is given and it is shown that the inherent filtering effects of a standard Kalman observer does not sufficiently address the issue. An expanded Kalman filter is introduced to estimate the underlying vertical road velocity, and this is applied within a linear state feedback controller. Its effect on suspension performance is shown to be advantageous when compared with simpler state feedback and integral control techniques.

Keywords:Feedback control, Kalman filtering, Linear control systems, State feedback, Vibration control, Deflection control, Vehicle suspensions
Subjects:H Engineering > H650 Systems Engineering
H Engineering > H331 Road Vehicle Engineering
Divisions:College of Science > School of Engineering
ID Code:11678
Deposited On:04 Oct 2013 10:46

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