Multiobjective H2/H∞ control design for a VSTOL flight model

In this paper, an application of a multiobjective optimal controller design approach on a multivariable vertical short take-off and landing (VSTOL) aircraft system is presented. To achieve good performance subject to white noises, bounded power disturbances, and to model uncertainties, and to have an acceptable reference tracking, combination of both H2(LQG) and H∞ methods is used. This method uses a time domain game approach for H2/H∞ design. It's required to solve the corresponding set of coupled algebraic Riccati equations to gain multiobjective controller.