Immittance identification: An application to the dynamic modelling of vehicle components
by N.G. Hemingway
International Journal of Vehicle Design (IJVD), Vol. 6, No. 1, 1985

Abstract: If the dynamic characteristics of a number of components or sub-systems can be defined then it is possible to predict the vibration characteristics of an assembly comprising these sub-systems. One method of defining the dynamic characteristics of the sub-system is to specify its immittance matrix. It is therefore desirable to obtain a mathematical model of a component that is capable of generating this immittance matrix. Such a model can be obtained from experimental data produced from a vibration test on the component and the process of extracting the model from this data is termed immittance identification. This paper shows how such a modelling was performed, on components comprising a vehicle suspension, from mobility test data obtained using relatively simple experimental instrumentation, together with an analytical method that reduced the computation necessary when determining the modal parameters of the model.

Online publication date: Sun, 25-May-2014

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