Based on linear matrix inequalities(LMI) and quantitative feedback theory(QFT)
a new design method of aeroengine robust controller was developed for uncertain mathematical model of aeroengine.The method has combined the design problem of frequency domain diagonal dominance pre-compensator and the solving process of LMI
thus achieving the decoupling of uncertain control objects.Moreover
a robust controller was designed with induction of QFT.The simulation results show that this method has good control efficiency and engineering applicability.