Autopilot Design for Bank-to-Turn Missiles using LQG/LTR Methodology

An autopilot for the class of Bank-To-Turn missiles is developed using a truly multivariable plant model and control design methodology. Thus, the pitch-yaw cross-coupling is included in the design considerations. The autopilot design is then applied to example airframes and linear simultations are carried out. The limitations of nonminimum phasedness are illustrated for the specific systems at hand and, as a result, an alternate airframe is proposed, in which the nonminimum phase characteristics are for the most part eliminated in the pitch channel. The revised airframe produces responses which are approximately twice as fast compared with the original nonminimum phase airframes.