Abstract: The system identification of vehicle handling dynamic model was investigated by the subspacebased identification method under linear conditions that the cornering vehicle velocity remains constant. The identification procedure was proposed for construction of inputoutput correlations to vehicle handling dynamics of the linearized system operating at a given speed. The identified dynamic model of the three degrees of freedom was constructed and the identifiability was verified according to the set of assumptions of subspace identification algorithms. Numerical examples were made for the vehicle lateral dynamics model identification and verification using real road test results obtained in two different manoeuvres at the same speed. It is demonstrated by comparisons between the predicted and test results that the present approach is efficient and convenient in the identification of vehicle handling stability systems subjected to the freely parameterized model. 

Key words: system identification, vehicle handling dynamics, subspace method