A Numerical and Experimental Study on Power Steering Shudder Hyundai Motor Company

Format:

Conference/Event

Author/Creator:

Kim, Bong-Kyu, author.

Conference Name:

SAE World Congress & Exhibition (2008-04-14 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2008

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2008-01-0501

Access Restriction:

Restricted for use by site license