Method for determining compression parameters of modular satellite

Abstract

The invention discloses a method for determining the compression parameters of a modular satellite, which is used for determining the diameter and the screwed force of compression screw rods and comprises the steps of: (1) determining a longitudinal load Fq and a transverse load Fh applied to the whole satellite; (2) determining the number n of screw rods selected during the overall design of the satellite, and determining the length L of the screw rods according to the sum of the heights of various modules; (3) calculating the diameter and the screwed force of the screw rods, which are required to ensure the compression between the satellite modules under the action of the longitudinal load Fq; (4) calculating the diameter and the screwed force of the screw rods, which are required to ensure the compression between the satellite modules under the action of the transverse load Fh; and (5) taking the maximal diameter and the maximal screwed force of the screw rods as the finally needed minimal diameter and minimal screwed force of the screw rods according to the results of the step (3) and the step (4). The method of the invention provides a guidance method for the compression design of the screw rods of the modular satellite, and can improve the deficiency that selection and experimental verification are performed only according to experience.

Description

technical field [0001] The invention relates to a method for determining compression parameters when each module of a modular satellite is connected and compressed by a screw. Background technique [0002] Modular satellites have been initially applied due to their simple interface, rapid development, and easy replacement. They are small satellites with promising development prospects. Modular satellites are generally composed of a number of relatively independent functional modules, and each module structure is connected up and down through multiple screws to form a satellite as a whole. The overall rigidity of the modular satellite is mainly guaranteed by the preload applied by the compression screw. Therefore, in a modular satellite, correctly determining the diameter and preload of the screw is an important means to ensure the overall rigidity of the satellite and to safely withstand external loads. [0003] The main content of modular satellite compression parameter d...

AI Technical Summary

Problems solved by technology

The analysis and determination of the screw parameters of the modular satellite is different from the selection and design of the installation bolts of the general equipment: the screw parameters of the modular satellite need to be considered to ensure that the modules are not separated during the loading process, that is, they are always in a compressed state, while the general equipment is a As a whole, the force can be in a state of tension or compression; the screw of the modular satellite is not directly connected to the fixed boundary (the mechanism connecting the bottom module and the launch vehicle is a fixed boundary), and the force deformation is complicated, and it cannot be used as a general equipment (its connecting bolts). connected to the boundary) the analytical method of the connecting bolt is calculated

At present, since the modular satellite is a new type of satellite structure, there is no direct analysis and guidance method for its overall compaction parameters. There are the following deficiencies: (1) The design is conservative or the design is insufficient

If the design is based on experience, the rigidity of the design may be insufficient, and it cannot be verified by the test. It is necessary to redesign the selection, which will bring about the reciprocity of the design and delay the progress of the development.

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