The aim of this study is to calculate the parameters of "Magic Formula" tire model using the measured data of a vehicle running on actual roads. To obtain the data, a new measuring system was first constructed. This system is composed of a multi-component force transducer to measure the tire forces, laser displacement sensors to measure the camber angle and an ultra-light CCD camera to measure the slip angle of a wheel by image processing. The identification method for deriving the Magic Formula parameters from the measured data sets by adding appropriate constraint conditions in the optimization calculation, was developed. Finally, the model obtained by the above process was compared with the model produced from the measured results on the indoor test bench.
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