Abstract:

In order to achieve the aim of near space aerostat in territory-hovering, based on the analysis of the thermodynamic environment condition, the coupled aerodynamic and thermodynamic model of high altitude balloon containing the ballonet was established. Based on the special wind field of quasi-zero wind layer, a flight control strategy was designed to achieve the aim of territory-hovering by aerostat. The adjustment of flight altitude was controlled by changing volume of ballonet that succeeded in the balloon zonal direction movement through reverse airflow in quasi-zero wind layer of zonal wind, with utilizing propeller to generate a control force to achieve meridional direction control, and numerical simulation was carried out with ECMWF wind field data. The simulation results show that aerostat can fly within the territory at latitude 41°(N) to 43°(N), longitude 86.5°(E) to 87.1°(E) as long as 7 days, which proves the possibility of using quasi zero wind to achieve the aim of near space aerostat in territory-hovering.

Key words:

near space, aerostat, quasi-zero wind layer, territory-hovering