High-precision and high-stability mounting method for satellite-borne star sensor

Abstract

The invention provides a high-precision and high-stability mounting method for a satellite-borne star sensor. The high-precision and high-stability mounting method comprises the following steps that acarbon fiber material is manufactured into a star sensor mounting structure through mould pressing machining, and thread tapping parts are reserved at the corresponding positions; the positions, corresponding to two diagonal mounting holes of an accurate measurement prism of the star sensor, of the star sensor mounting structure are matched and tapped to form two screw holes; the star sensor is mounted on a satellite structure through screws, and the precision is roughly adjusted; the precision of the star sensor is measured and finely adjusted; after the precision is adjusted to be within the required range, the diagonal screws are tightened, and required torque is applied; the satellite structure is subjected to pin hole matching through two remaining holes in the star sensor; pin screws are mounted at two pin holes and tightened through flat pads, elastic pads and nuts, and tightening torque is applied; and the screws and the pin screws are dispensed to be firmly sealed. When beingassembled, the satellite-borne star sensor can be mounted on a satellite through the existing mounting holes in the star sensor in high-precision and high-stability modes.

Description

technical field [0001] The invention relates to the overall design technology of a spacecraft, in particular to a high-precision and high-stability installation method for a spaceborne star sensor. Background technique [0002] With the development of advanced space technologies such as space remote sensing mapping and aerospace reconnaissance in China, star sensors, as an independent high-precision attitude measurement instrument, have become necessary attitude-sensitive components on satellites, space shuttles and space stations. Under the background that our country has realized the application of high-precision star sensors, it is of practical significance to study the high-precision and high-stability star mounting technology of high-precision star sensors to ensure the success of satellite in-orbit missions. [0003] With the whole star, the star sensor experiences vibration, temperature changes and other factors during launch and in-orbit operation, which cause the in...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the star sensor is generally connected with the star structure by means of hexagonal socket head cap screws after accuracy measurement and then glued to prevent the accuracy deviation from occurring again after the star is installed. However, this method cannot effectively guarantee the accuracy of the star sensor. The precision stability of the rotational degree of freedom pointing around the optical axis (around the Z direction) before and after the mechanical test leads to deviations in precision stability. Therefore, how to ensure the deviation of precision stability from the perspective of assembly has become a difficult problem

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