然后，基于最优控制对高空飞艇纵向高度控制系统进行了设计；
In this paper, a high altitude airship model with compound control of elevator and ancillary air bursa charging and deflation is given firstly.
这款飞艇仅靠自然风来推进和掌控方向，它将环绕美国上空旅行，让乘客体验一种独特的高空生活。
Propelled and steered by wind alone the plane would travel around the USA allowing customers a unique insight into life above the chimney tops.
此外，就算被刺穿了，它们通常也能留在高空：气球飞艇内部氦气的压力和外部气压相近，因而气体不会溢出。
Moreover, they usually stay aloft even when punctured: the pressure of the helium inside a blimp is about the same as that of the air outside, so the gas does not rush out.
建筑设计师文森特·卡勒博（VincentCallebaut）最近公布了一个极为理想的计划，其中的建筑为一群悬在高空的、能够自给自足的飞行器；这些飞行器一半是飞艇城市，一半是能够产生氢气的悬浮农场。
Architect Vincent Callebaut recently unveiled a blue-sky plan for a high-flying fleet of self-sufficientaircraft that are one part zeppelin cities and one part hydrogen-generating floating farms.
建筑设计师文森特·卡勒博（VincentCallebaut）最近公布了一个极为理想的计划，其中的建筑为一群悬在高空的、能够自给自足的飞行器；这些飞行器一半是飞艇城市，一半是能够产生氢气的悬浮农场。
Architect Vincent Callebaut recently unveiled a blue-sky plan for a high-flying fleet of self-sufficientaircraft that are one part zeppelin cities and one part hydrogen-generating floating farms.
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