The Synthetic 3DOF Wheel Force for Passenger Vehicle Based on Predicted Frequency Response Function Model

Shengjie Xu

doi:10.4271/2018-01-0123

To determine the vehicle chassis requirements, wheel force transducer (WFT) have been the best option when it is being used in targeting customer correlation or determining the effective use of the proving ground. However, using wheel force transducer in customer correlation fleet test is often unfeasible due to the huge cost and low practicability. As a result, engineers have to choose other transducer measures. This paper describes an effective approach of wheel force prediction by using the frequency response function (FRF) model of vehicle dynamic system.

A vehicle system linear modelling technique is used. For the system identification of FRF, the acceleration and wheel force time history data, as system input and output, are collected from an instrumented passenger car as it traverses in different real-world proving ground surfaces. The obtained FRF represents the complex suspension mechanical model. Once the FRF is calculated, the predicted force signal can be implemented.

The quality evaluation of prognostication results is made by comparing the synthetic and real-world wheel force signals in time/frequency domain and frequency-related pseudo damage. The result indicates that the FRF derived from real-world data is an effective modelling tool. Furthermore, it is a promising application in the field of customer usage fleet test and suspension dynamic system modelling or control.

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The Synthetic 3DOF Wheel Force for Passenger Vehicle Based on Predicted Frequency Response Function Model 2018-01-0123

SAE MOBILUS