Energy Management Strategy of Distributed Electric Propulsion Aircraft Hybrid Power System based on State Machine

Fuel cell has received more and more attention in the field of green aviation in recent years due to their zero-emission and pollution-free advantages. In this paper, a flight mission model of a distributed electric propulsion aircraft is established, and an energy management strategy based on an improved multi-dimensional coupled state machine is designed by considering factors such as multi-mission profile power requirements and failure emergency measures for the aviation electric propulsion hybrid power system. The strategy is based on a state machine and divides the operation of the distributed electric propulsion aircraft into four states: climb, cruise, descent, and malfunction. The overall operation test of the aircraft model is carried out based on the four states, and the research results indicate that compared with the load-following mode control strategy, the proposed strategy increases the average fuel cell (FC) efficiency by 3.83%. In addition, the proposed strategy saves 7.95% of hydrogen and can effectively ensure flight safety in the event of a malfunction.