Analysis and design of stratospheric airship propulsion system

For the problem of propeller and motor matching, brushless direct current (DC) motor model and propeller model were constructed. In order to research the control response problems of propulsion system at 0 to 10 m/s cruising speed of airship and the simulation model of control system of propeller and motor was designed in Simulink by combining matching design and motor speed control. The interface of propeller and motor matching was compiled in graphical user interface (GUI). Propeller and motor matching software was developed. The matching design curves for operation at 0 to 10 m/s cruising speed of airship, the working range of propeller from 535 to 1071 r/min and working efficiency of the propulsion system from 0.558 to 0.593, were obtained, which can be used as the reference basis for matching design between high altitude propeller and motor.