基于控制通道解耦的舰载机着舰迎角控制方法OA

For the practical problem of unstable heading due to correcting the angle of attack(AOA)deviation of carrier-based aircraft during approach and landing,an automatic control method of carrier-based aircraft AOA was proposed in this paper.By adjusting the elevator,the AOA was precisely controlled,while changing the throttle to maintain the flight path angle.The dynamic characteristics of the aircraft in landing were considered in the design of the surface control law,which was simplified as a proportional control of AOA and pitch rate,involving less model information and weak coupling with the throttle control law.Then,all the control gains were optimized through having AOA and flight path angle to track the speci-fied signals.Further,a transition for the command of AOA was introduced and the functional relationship between the transi-tion duration and the command amplitude was established to meet the limitations on the actuator actions.Finally,the design method proposed in this paper was verified through linear and nonlinear model simulations of a carrier-based aircraft.The re-sults indicated that the closed-loop responses of both models were highly consistent,a deviation command of AOA of 5° pro-duced a convergence time of about 4.5 s,with almost synchronous changes in pitch angle and AOA,and invariant flight path angle;besides,the responses did not cause action saturation of the effectors.