This paper proposes an adaptive engine stall margin control(AESMC)for integration of flight and propulsion controls.Using the model reference adaptive control(MRAC)technique,the AESMC is to adjust exhaust nozzle area to uptrim the engine pressure ratio so that the engine stall margin remains a small constant value in all operation conditions and in full flight envelope.Benefit of the control system is to increase engine thrust and to reduce aircraft acceleration time.In order to evaluate the performance of the AESMC,a nonlinear integrated flight/propulsion model is developed.Digital simulation of the IFPC system is performed.The simulation results show that the IFPC system with the adaptive controller developed has good effectiveness for all operation conditions and for full flight envelope.For example,the thrusts of two engines are increased 16%,and aircraft acceleration time is reduced 23% at altitude 10km and Mach number from 0 65 to 0 9.
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