Semi-open airship

Abstract

The invention provides a semi-open airship, which comprises a fixed rigid framework (1), a buoyancy-lifting gas bag (2), a converging skin (3), a converging device (6) and an air bag (7). By converging and diverging the converging skin (3), the effective buoyancy volume is adjusted, the situation that the air throughput of a fixed-displacement airship in ascending and descending processes is large is avoided, the burden of a gas management system is reduced and the mass and inertia change of the entire airship is reduced; through the converging skin (3) and the fixed rigid framework (1), the airship is enabled to have better aerodynamic configuration, the overall rigidity of the structure of the airship is guaranteed and the effects of structural adjustment of the airship and flying without depending on an external carrier are realized; the deformation of the converging skin (3) and a buoyancy-lifting gas bag skin (22) is realized mainly through folding and unfolding, tensile deformation theoretically does not exist, the requirement on fatigue resistance of skin and bag materials is reduced and the extension and retraction motion of the variable airship air bag in the prior art is structurally replaced.

Description

technical field [0001] The invention belongs to the technical field of airships, and in particular relates to a semi-open airship. Background technique [0002] The airship is a kind of aerostat that relies on aerostatic buoyancy and can be maneuvered to fly. It has good maneuverability and maneuverability. Compared with other aircraft, it can achieve slow speed with relatively low power consumption The unique advantages of flying and fixed-point hovering. The long-endurance airship provides a new means for regional earth observation and communication, and has broad application prospects. [0003] Only when the buoyancy force is in balance with the gravity force, that is, the net buoyancy force is zero, can the airship hover in the air. Due to the significant change in atmospheric density from the ground to the high altitude, airships are required to have strong net buoyancy adjustment capabilities in order to achieve long-span flight. Airships in the prior art generally ...

AI Technical Summary

Problems solved by technology

Chinese patent CN101229848A discloses an air-deployable airship with an inflatable skeleton. The disadvantage is that the airship lacks the necessary aerodynamic shape at low altitudes, and its autonomous flight capability is limited, requiring auxiliary means of delivery such as balloons.

Chinese patent CN101157384A discloses a variant airship that controls the elongation and contraction of the hull mechanically, thereby changing the volume of the airbag, and uses the change of its displacement to adjust the buoyancy, avoiding the use of auxiliary airbags. The body is always tensed during the deformation process, which inevitably requires part of the skin area to withstand repeated stretching deformation, plus structural loads, and at the same time maintain air tightness, which puts forward high requirements for skin materials.

Chinese patent CN100577511C discloses a method of using rigid skeleton to expand and expand to realize deformation. The disadvantage is that a large number of rigid movable parts are used, the structure is complicated, and the reliability guarantee is difficult. The larger the volume of the airship, the more difficult it is to realize the technology.

In addition, in the tightened state, although the longitudinal area of ​​the airship is reduced, its lateral windward area is still large, which is not conducive to improving flight control stability

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