Abstract: In this paper, the authors analysed the reversed-frame normalization (RFN) method for the design of robust controllers of multivariable systems. A new design method based on the alignment of dominant eigenvectors is developed. This method maintains the advantages of the RFN method in robustness, while the controller matrix obtained is guaranteed to be rational. The design is less conservative compared to the existing RFN method and has been successfully applied to the design of turbo-generator controller.