A fixed H∞ controller for a supermaneuverable fighter performing the herbst maneuver,

This paper presents an H∞ flight control system design case study for a supermaneuverable fighter flying the Herbst maneuver. The Herbst maneuver presents an especially challenging flight control problem because of its large ranges of airspeed, angle of attack and angular rates. A fixed H∞ controller has been developed via the mixed-sensitivity problem formulation for 20 linearized models representing the maneuver. Both linear and nonlinear full model evaluations indicate that this single H∞ controller together with a fixed LQR inner loop feedback have achieved “robust stability” and “robust performance” for the entire maneuver without gain scheduling.

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