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An Analytical Control Systems Approach to Steering Shudder
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 01, 1995 by SAE International in United States
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Historically, power steering shudder, a vibration which occurs while steering a vehicle at low speeds, has been approached with systematic component-swapping experiments. This approach was time consuming and did not necessarily yield satisfactory results. In this paper it is shown that steering shudder can be analytically approached as a control system with a closed-loop limit cycle caused by the interaction of the chassis and the steering system. This approach provides a metric for determining a vehicle's propensity to shudder and allows quick predictions of the results of changing components.
The approach is model-based, and incorporates chassis and hydraulic system components. Results obtained from the control systems analysis have been validated by a vehicle study, which showed a strong correlation between subjective evaluations and the stability metric provided by the analysis. The control systems approach has been used to develop robust shudder solutions for a number of vehicle platforms.
CitationSmith, J., Ferries, G., and Arbanas, R., "An Analytical Control Systems Approach to Steering Shudder," SAE Technical Paper 951254, 1995, https://doi.org/10.4271/951254.
- MATRIX x/SystemBuild User's Guide. Integrated Systems, Inc., 1994.
- Merritt H. E., Hydraulic Control Systems. New York, NY: John Wiley and Sons, 1967.
- McCloy D. and Martin H. R., Control of Fluid Power: Analysis and Design, 2nd (Revised) Edition. Chichester, England: Ellis Horwood Limited, 1980.
- D' Azzo J. J. and Houpis C. H., Linear Control System Analysis and Design: Conventional and Modern, Second Edition. New York, NY: McGraw-Hill, Inc., 1981.
- Yates F., “Design and Analysis of Factorial Experiments,” Imperial Burough of Soil Science, Harpenden, England, Technical Communication 35, 1937.