Abstract: First,this paper briefly introduces the H ∞ methods which have satisfactory robust stability and robust performance, and then it surveys the application studies of H ∞ methods in robust flight control systems design in recent years,which includes showing how to formulate and solve the H ∞ robust flight control system design problem, and analysing the design techniques, such as model/controller reduction, simultaneous stabilization of the structured and unstructured uncertaintes and multi models design techniques which are suitable for H ∞ methods.

Key words: system stabilit, optimum contro, robustnes, flight control