Min-Max Controller Design for Double Shaft Unmixed Turbofan Engine’s Thermodynamic Model

In this paper, a Min-Max controller design is presented for a double shaft unmixed turbofan engine’s thermodynamic model at design point. For this objective, first, the safe operation’s limitations for turbofan engine are determined from the related catalogues and references and used in controller design process. Thermodynamic Modelling and controller design are conducted in Simulink environment of MATLAB software. Simulation results show that the controller effectively provides the thrust command and the limitations of high pressure spool speed and acceleration, output pressure of high pressure compressor and output temperature of combustion chamber are satisfied and surge, stall and flameout events are prevented.