MODELING AND SIMULATION OF NONSTEADY STATE CORNERING PROPERTIES AND IDENTIFICATION OF STRUCTURE PARAMETERS OF TIRES

A theoretical model of nonsteady state tyre cornering properties (NSST CP) with small lateral inputs and its experimental validation are pres ented. The flexibility of carcass composed of translating, bending and twisting parts is considered. Tyre structure parameters in the model can he simplified as four nondimensional factors which associate with stiffness of tread and carcass, lyre width, length of contact patch re spectively. The tests of NSSTCP including pure yaw motion and pure lat eral motion are designed and realized by step lateral inputs. Then the structure parameters are identified according to the expressions of t he analytical model and frequency response data resulting from the tes t data in spatial domain. The derived model is validated by experiment results.