Robust integrated flight and propulsion controller for the Harrier aircraft

An integrated longitudinal plus lateral flight and propulsion control syste m is designed for the Harrier short takeoff and vertical landing aircraft, using the technique of H-infinity loop shaping. This centralized controller is partitioned via a step by step procedure, which generates both nominal performance and robust stability specifications for the engine subsystem. P erformance properties of both the centralized and partitioned systems are v alidated via nonlinear simulation. Implications of the design experience fo r the implementation of a full integrated flight and propulsion control sys tem on the Harrier are considered.