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Handling Enhancement Due to an Automotive Variable Ratio Electric Power Steering System Using Model Reference Robust Tracking Control
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1996 by SAE International in United States
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An automotive steering system that can vary the overall steering ratio as a function of the vehicle's forward speed has the potential to enhance the lateral handling qualities of the vehicle for different driving situations. A “quicker” steering ratio at low speeds can help provide greater ease in maneuvering the automobile. A “slower” steering ratio at higher speeds can alleviate the “dartiness” experienced by some vehicles with a fixed overall steering ratio. The concept of a vehicle's “sensitivity” to steering inputs from the driver is exploited to provide the basis for developing how the overall steering ratio is customized as a function of vehicle speed.
This paper compares the on-center handling performance of an automotive power steering system that is capable of varying the overall steering ratio versus vehicle speed against that of a traditional manual steering system with a fixed overall steering ratio. Dynamic simulation results demonstrate that the variable ratio steering system is capable of improving the on-center handling performance of the vehicle based on industry standard performance measurements.
|Technical Paper||A Study of Assist Control in Electric Power Steering - Driving Pattern Rule-Based Control -|
|Technical Paper||Compensation of Power Supply Fluctuations in Electric Power Steering (EPS) Systems|
CitationMillsap, S. and Law, E., "Handling Enhancement Due to an Automotive Variable Ratio Electric Power Steering System Using Model Reference Robust Tracking Control," SAE Technical Paper 960931, 1996, https://doi.org/10.4271/960931.
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