A graphical design methodology of missile autopilot

The graphical design methodology for designing two loop lateral missile autopilot has been proposed. The design methodology enables to find out graphically maximum attainable autopilot gain cross over frequency and the corresponding set of control gains. This method may be used to choose the possible phase margin and gain margin pairs and feasibility of obtaining the control gains for any user specifications on phase margin and gain margin. The step by step design algorithm has been given in detail and illustrated with one numerical example.