X Number Of Aero-engine Control System Analysis

Digital electronic control has been the main development direction of aero-propulsion control system.The paper focus on the study of fuel control to different phase aero-engine,The work of this thesis are as follows:1. Analyses the start process and gives the control law in the light of similitude parameter fuel.2.The paper analyses the steady-state of the digital electronic control engine. As N1 less than 85% , it gives the open-loop control law of fuel and staff, and when N1 more than 85%,it adopts close-loop to fuel. The paper designed PI controller and adopted reasonable portion for envelopment.3.The paper studies transition control process of the engine and gets the main fuel control law of accelerating and decelerating which has been simulated. The curve of accelerating and decelerating can reflect the test curve well.4.The paper analyses the steady-state control when afterburning and gives the height-velocity curve which gets under the control law that fuel retain as constant.5. At last, the paper analyses the character and function of the input and output parameters to the digital electronic controller. Moreover, it analyses the time sequence of control to different work phases and control law of nozzle.