Robust control design of active suspensions using modal descriptions of vehicle finite element models

摘要

The objective in this paper is to combine the finite element method with the robust control design method. The finite element method results in a high-complexity model with a large number of degrees-of-freedom, which is the basis of the control design. The superposition method is applied as a modal reduction in order to reduce the large-scale finite element model into an acceptable reduced-complexity model. This method guarantees the effective selection of all the significant frequencies in the control design sense. In the design of a robust control both the performance specification and the model uncertainties are taken into consideration, To demonstrate the effectiveness of the proposed procedure a finite element structure of a bus model with 3444 degrees-of-freedom is applied. The active suspension system designed is tested with the original non-linear finite element model.