A Method of N-dot Acceleration Law Optimization and Controller design for Turbofan Engines

摘要

Aiming at the design of acro-cnginc transient controller, an improved closed-loop control method is adopted to convert the rotor acceleration command into the rotor speed command which contains N-dot command information. This method avoids the differentiator of the controller amplifying the interference to couple into the control loop, which provides better performance and robustness of dynamic control to engine. In addition, the entire controller design uses the inverse model to obtain the engine acceleration and deceleration N-dot schedules. The N-dot command is calculated through interpolation of the N-dot schedules according to the engine output information. From the simulation, the actual rotor speed of the engine can track the expected speed well with the power lever moved fast, and in the case of an interference signal, the interference effect can be quickly attenuated and then return to the steady state.