An incompletely decoupled model reference adaptive control method is proposed for aeroengine binary control system.A new adaptive control method is applied to every incompletely decoupled subsystem

then remains of coupling and nonlinear influence can be resolved by adaptive principle robustness.This binary decoupled adaptive controller can diminish the coupling gradually and has excellent robustness to model uncertainty and external disturbances.Simulation results demonstrate the effectiveness of the incompletely decoupled adaptive controller.