In this paper

an enhanced decentralized composite controller was proposed for the fuel cell/lithium battery hybrid power system (FC/LB-HPSS) of more electric aircraft/all electric aircraft to achieve dynamic distribution of load power and global stability of the system under extreme load changes

effectively improving system robustness. By adopting the adaptive robust sliding mode controller based on the improved droop control

the FC and LB units' nonminimum phase problem of their converters were solved. Compared with conventional PI based control

the proposed control strategy significantly simplifies the closed-loop small signal model of HPSS

making it easier to guide the design of critical parameter of the system in theory. The optimization and shaping of output impedance of each unit is also more convenient and accurate. Then

simulation and experiments verified the correctness of the theoretical analysis and effectiveness of the proposed composite controllers.