A Numerical and Experimental Study on Power Steering Shudder 2008-01-0501
Shudder vibration of a hydraulic power steering system during parking maneuver was studied with numerical and experimental methods. To quantify vibration performance of the system and recognize important stimuli for drivers, a shudder metric was derived by correlation between objective measurements and subjective ratings. A CAE model for steering wheel vibration analysis was developed and compared with measured data. In order to describe steering input dependency of shudder, a new dynamic friction modeling method, in which the magnitude of effective damping is determined by average velocity, was proposed. The developed model was validated using the measured steering wheel acceleration and the pressure change at inlet of the steering gear box. It was shown that the developed model successfully describes major modes by comparing the calculated FRF of the hydraulic system with measured one from the hydraulic excitation test. Vibration mechanism from pressure variation at power steering pump outlet to steering wheel vibration was shown through Eigen value analysis of the model. Using the developed model, an optimization was conducted and important factors were presented.
Citation: Kim, B., Grenier, G., and Cerrato-Jay, G., "A Numerical and Experimental Study on Power Steering Shudder," SAE Technical Paper 2008-01-0501, 2008, https://doi.org/10.4271/2008-01-0501. Download Citation
Author(s):
Bong-Kyu Kim, Glen C. Grenier, Gabriella Cerrato-Jay
Affiliated:
Hyundai Motor Company, MTS Systems Corporation, Sound Answers
Pages: 8
Event:
SAE World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Steering and Suspension Technology Symposium, 2008-SP-2189
Related Topics:
Power steering
Steering systems
Hydraulic systems
Simulation and modeling
Vibration
Wheels
Vehicle drivers
Pressure
Gears
Pumps
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