Improved Variable Deviation Collaborative Control of Vector Nozzles for Aircraft Engine

Vector nozzle is an adjustable tail nozzle in aircraft engines. Due to the complex structure and coupling effect of each actuator, the traditional collaborative control methods can hardly achieve the required time synchronization. In this paper, an improved variable deviation collaborative control method is proposed to address such issues, which promotes the synchronization performance of nozzle actuators through an improved deviation coupler. At the same time, an adaptive disturbance rejection controller is used to enhance the robustness of the system. The experimental results show that the error of synchronization time of each actuator in the vector nozzle is less than $5 \%$, and the steady-state error of displacement is less than $1 \%$, which meets the requirement of practical engineering.