In vehicle dynamics researchers traditionally investigate the suspension performance based on a quarter car model and then reestablish a comprehensive model for the full car by considering additional degrees of freedom (DOF). Based on the derivation of the coupling ratios between the sprung mass of a full car and four sprung masses of quarter cars, the analysis of a full vehicle dynamics with fourteen DOFs in vertical and lateral directions is possible. The full car model can be expressed by four independent quarter car models. An analysis method will be investigated in order to provide a novel performance estimation for a full vehicle suspension. The case study shows that the vibrations of a full vehicle can be quantitatively obtained based on the test results of quarter suspensions.

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