When aero-engine received transient test in altitude test facility

the intake control system was abnormally affected and the quality of intake pressure control couldn’t be improved by conventional control methods

so an intake pressure control method based on linear active disturbance rejection was proposed. The high-intensity intake control system simulation platform was built through mechanism simulation and system identification

and the linear active disturbance rejection law was designed to estimate and compensate engine disturbance in real-time manner. An intake pressure control method with active rejection mechanism was formed. Meanwhile

considering the switching problem between manual and automatic control or between different control laws in actual use

an practical bumpless transfer method was designed. Simulation results compared with PID showed that the intake pressure can be quickly converged and stabilized

meanwhile

the maximum deviation was reduced from 7.69kPa to 0.9kPa. So this method achieves good control effect without engine information and can greatly improve intake pressure control quality in transient test.