Multivariable gain and phase margin analysis of a fully coupled six-degree-of-freedom guided missile

This paper presents a stability analysis of a fully coupled six-degree-of-freedom linear model of a guided missile system using single-input single-output and multivariable gain and phase margins. The analysis indicates that the multivariable margins decrease with the total angle of attack, whereas the classical margins exhibit little to no dependence on the total angle of attack. An example illustrating the effects of a realizable multivariable phase perturbation on the nonlinear system is also presented