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New Analysis Technology for Automotive Chassis Sensitivity of Steering Wheel Vibrations Induced by Tire-Wheel Imbalance or Brake Torque Fluctuation

Article of Honda R&D Technical Review Vol.20 No.2

Summary

A simulation model for analyzing vehicle chassis sensitivity for the vibrations caused by tire-wheel imbalance and brake torque fluctuation has been developed. Nonlinear elements, such as detailed steering power assist system, frictions and nonlinear bushings are taken into consideration. The simulation model is extensively correlated with laboratory excitation tests in both frequency and time domain. The model is then used to analyze the mechanism of chassis sensitivity, and as a result, contributing chassis vibration modes and influential chassis factors are identified. The analysis results are further correlated with vehicle on-road tests with specification changes in critical factors. Reliable correlation between simulated and measured trends is achieved.

Reference

(1) Ligonde, S., Farahmand, S.: Nibble Sensitivity Correlation between Experimental Data and Virtual Prototyping Using ADAMS/Vibration, North American ADAMS User Conference (2002)
(2) Meltinger, T.: Investigation of Shimmy with Multibody Simulation Methods, 5th Stuttgart International Symposium on Automotive and Engine Technology (2003)
(3) Takegawa, T., Ohhara, T., Wakabayashi, Y.: Brake Judder and Shimmy Simulation Technology Development, 18th Symposium of International Association of Vehicle System Dynamics (2003)
(4) Kim, B. S., Song, S. H., Kim, J. H., Park, K. H.: Vehicle Ride Comfort and Brake Judder Dynamics Analysis Considering Nonlinear Characteristics, SAE Technical Paper, 2003-01-1614 (2003)
(5) Yu, J., Slattengren, J., Motoyama, K.: Modeling and Factor Analysis of Hydraulic Power Steering Systems for Rotational Steering Vibration by Using MSC.ADAMS, MSC. Software Virtual Product Development Conference (2004)
(6) Yu, J.: An Analysis of Fluid-Mechanically- Coupled, Non-Linear Rotational Vibration Sensitivity of Automotive Hydraulic Power Steering Systems, International Mechanical Engineering Congress and Exposition (2004)
(7) Meyer, R.: Brake Judder – Analysis of the Excitation and Transmission Mechanism within the Coupled System Brake, Chassis and Steering System, SAE Technical Paper, 2005-01-3916 (2005)
(8) Yu, J., Nutwell, B., Brickner, B.: Analysis of Vehicle Chassis Transmissibility of Steering Shimmy and Brake Judder: System Modeling and Validation, SAE 2007 Noise and Vibration Conference and Exhibition (2007)
(9) Yu, J., Brickner, B., Nutwell, B., Johnson, M.: Analysis of Vehicle Chassis Transmissibility of Steering Shimmy and Brake Judder: Mechanism Study and Virtual Design of Experiment, SAE 2007 Noise and Vibration Conference and Exhibition (2007)

Author (organization or company)

Jinghong YU(HONDA R&D AMERICAS, INC.)、Brian Nutwell(HONDA R&D AMERICAS, INC.)、Brian Brickner(HONDA R&D AMERICAS, INC.)

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