The augmented turbofan engine, currently being developed for several advanced military applications, presents new challenges to the control designer. A fresh approach to the engine control design is necessary to exploit the promising characteristics of this propulsion system in the far-ranging areas of the flight spectrum. The General Electric Company has been developing an integrated electrical/hydromechanical control system designed expressly for this new breed of propulsion system. This paper discusses the requirements for the system, the results of control mode studies, and the highlights of the resulting control design. Special features of the control, including new sensing requirements, are discussed.
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