Modeling and dynamic simulation study of big inertia propulsion system of high altitude airship

Propulsion system is one of the most important parts of high altitude airship. It´s really a need to build a simulation model of propulsion system and make some analysis about high altitude airship. An integrative model is established according to the matching of the torque between Rare earth permanent magnet Brushless DC motor and propeller in the use of Matlab/Simulink. Vast work is spent on making a plenty test of this integrative model. Also a series of analysis of the pull, torque and real absorb power generated by big inertia propulsion system in different working conditions is made in this passage. At last, the property envelop of this propulsion system is got. System efficient trend with the change of propeller diameter is got through simulating.