Design and piloted simulation of a robust integrated flight and propulsion controller

A robust integrated Eight and propulsion controller is designed for an experimental short takeoff and vertical landing aircraft configuration, using the method of H-infinity loop-shaping. The aircraft model used in the study is based on the Harrier air frame with the Pegasus engine replaced by a thermodynamic simulation of a Rolls-Royce Spey power plant, to allow the incorporation of advanced engine control concepts. The controller follows a two-inceptor strategy to command Eight-path angle rate and velocity along the Eight path, while simultaneously keeping several airframe and engine variables within specified safety limits. The centralized integrated flight and propulsion control system is evaluated in piloted simulation trials. Results indicate that level 1 or 2 Eying qualities are achieved over the low speed powered lift region of the flight envelope.