Flexible film inflatable cylinder with reinforced sheath and storage and folding method for cuboid thereof

Abstract

The flexible membrane inflatable cylinder with reinforced sheath and its cuboid storage and folding method belong to the field of microsatellite de-orbiting technology at the end of its working life. Shape-conserving, without the purpose of local and overall instability, the inflatable cylinder contains an air bag and an air nozzle, and a reinforcing sheath is arranged on the air bag. The step of arranging the airbag by the shape of the unit; the step of further folding the airbag folded into a thickened folded unit shape along the short axis direction to make it reach the target length in the short axis direction; The zigzag folding in the direction of the axis makes it reach the upper step of the target length in the direction of the long axis; the invention is used for satellite de-orbiting.

Description

technical field [0001] The invention belongs to the technical field of deorbiting at the end of the working life of a microsatellite, and in particular relates to a flexible film inflatable cylinder with a reinforcing sheath and a method for storing and folding the cuboid. Background technique [0002] In order to limit the growth of space debris and protect the space environment, according to the international standard ISO23312 "Detailed Requirements for Space Debris Mitigation of Spacecraft" released in 2018, small satellites need to be carried by themselves to increase resistance and deorbit, and have no power consumption and small storage volume when launching. Film inflatable cylinder, the film inflatable cylinder is carried in a folded and stored state. When the microsatellite reaches the end of its working life, the film inflatable cylinder will be unfolded in an orderly manner under the condition of inflated and pressurized, the volume will increase, and the air resis...

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the storage volume, the wall thickness of the airbag of the film inflatable cylinder is not more than 200 microns, and the diameter is greater than one meter, and the ratio of its diameter to the film wall thickness is greater than 5,000. , affected by the air resistance effect of the space environment, the structure of the film inflated cylinder is very prone to local instability. In order to avoid local instability, it is necessary to set up a reinforced structure. Considering the folding requirements of small curvature radius, the traditional reinforcement method is through airbag Local multi-layer thickening to increase the rigidity after unfolding, or folding after the local surface is coated with a hardenable resin reinforcing belt, and the hardenable resin is irradiated with ultraviolet light or heated and cured to form a rigid reinforcing belt to improve the rigidity; The former thickening layer is thinner and the effect is limited. If it is too thick, the radius of curvature increases when folding, which is not easy to fold, and the overall thickness increases after folding, and the volume is too large;

Images