ROBUST CONTROL DESIGN BASED ON HIGH-COMPLEXITY MODELS

Abstract

In this paper a high-complexity finite element structure of the truck model is proposed in the control design of active suspension systems. A significant step of the method is the selection of a reduced-order model by using the relevant frequencies up to 30 Hz from the modal representation of the model. The model uncertainty can also be approximated with the difference between the high-order and the reduced-order models. Then the model is augmented with the specifications of the performance demands and the multiplicative uncertainty structure. The control design itself is based on the H∞/\mu method, which guarantees that the controlled system achieves robust stability and meets performance demands.