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A New EPS Control Strategy to Improve Steering Wheel Returnability
Technical Paper
2000-01-0815
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
This paper proposes a new Electric Power Steering (EPS) control strategy that enables improvement to steering-wheel returnability. Using a conventional EPS controller, frictional loss torque in the steering mechanism reduces steering-wheel returnability, which drivers occasionally perceive as unpleasant. This phenomena occurs in any EPS system regardless of motor type or mounting location. To improve steering-wheel returnability for EPS-equipped vehicles, we developed a new control strategy based on estimation of alignment torque generated by tires and road surfaces. This proposed control strategy requires no supplemental sensors like steering-wheel angle or motor-angle sensors. We experimented with this proposed control algorithm using a test vehicle and confirmed that it enables improved steering wheel returnability and also better on-center feeling.
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Citation
Kurishige, M., Wada, S., Kifuku, T., Inoue, N. et al., "A New EPS Control Strategy to Improve Steering Wheel Returnability," SAE Technical Paper 2000-01-0815, 2000, https://doi.org/10.4271/2000-01-0815.Also In
References
- Norman K.D. et. al. “Objective Evaluation of On-Center Handling Performance” SAE Paper 840069 1984
- Post J. W. “Modeling and Testing of Automobile Power Steering Systems for the Evaluation of On-Center Handling” Ph.D. Dissertation Clemson University 1995
- Kurishige M. et. al. “A Control Strategy to Reduce Steering Torque for Stationary Vehicles Equipped with EPS” SAE Paper 1999-01-0403 1999
- Gibson J. E. “Nonlinear Automatic Control McGraw-Hill 1963