H2 analytical decoupling design for a High-Angle-of-Attack missile

The cross-coupling effects increase acutely as the angle of attack increases, which may result in unpredictable performances. Besides, as the angle of attack increases, the system may become static unstable and make the design of autopilot more complicated. In order to overcome the problem, a new H₂ analytical decoupling design approach which suitable for unstable non-minimum phase (NMP) systems is applied to a high-angle-of-attack missile. Compared with other developed methods, the new H₂ analytical decoupling design method has three evident advantages: Firstly, the design procedure is simple. No weight function needs to be chosen. Secondly, the design result is easy to use. The resulting controller is given in an analytical form. Thirdly, the performance and robustness of the closed loop system can be easily adjusted. Numerical simulation of 5-degree-of-freedom (DOF) missile with high-angle-of-attack proves the effectiveness of the design method.