Parametric robustness evaluation of a H-infinity missile autopilot

A multivariable missile autopilot is synthesized using a H-infinity loop shaping procedure by McFarlane and Glover. Because missile night control systems must guarantee stability and performance in the presence of large aerodynamic uncertainties, advanced mu tools are next used to analyze robust stability and performance of the control law in the presence of real parametric uncertainties in the stability derivatives. The multivariable H-infinity autopilot is proved to exhibit good parametric robustness properties. The control law is finally validated on a nonlinear simulator.