Research on FOPI control of high bypass ratio turbofan engine based on Min-Max architecture

Abstract

For efficient control of a high bypass ratio turbofan engine, it is desirable that the engine operate as close as possible along its engine limits. With the continuous development of the engine, the performance requirements, especially the response speed, are becoming more and more stringent, and the conservatism of the PI control based on the Min-Max architecture is gradually emphasized, which cannot meet the performance requirements of the engine system. Fractional order control theory is introduced to improve the PI control. Fractional order control theory introduces fractional order integral order for fractional order PI control, which provides a new concept for the performance improvement of the system. Fractional order theory is used to design the FOPI master and limiter and apply to the CMAPSS90K engine model for simulation and analysis, and the simulation results show that the FOPI master and the FOPI control (including the fractional order limiter) can significantly improve the response speed of the system and enhance the performance of the system. The proposed FOPI master of a turbofan engine with high bypass ratio based on the Min-Max architecture can significantly improve the performance of the system, especially the response speed, and reduce the conservatism of the Min-Max architecture.