Thermal deformation testing system of high-precision star sensor support

Abstract

The invention provides a thermal deformation testing system of a high-precision star sensor support. The thermal deformation testing system comprises a temperature control system and a thermal deformation measuring system, wherein the temperature control system comprises a temperature loading system and a temperature measuring system and is used for accurately simulating a star sensor support in-orbit temperature field through feedback control of temperature loading load. The thermal deformation measuring system adopts an angle measuring system based on a photoelectric auto-collimator and usedfor measuring an optical axial vector of a star sensor standard prism under the specified measurement conditions, utilizing the optical axis of the standard prism to represent a pointing angle of thestar sensor, obtains the pointing change situation of the star sensor through data analyzing treatment and verifies the rationality of thermal stability design of the star sensor support. The high-precision thermal deformation ground verification test demand for arc-second-level pointing change of a satellite star sensor due to thermal deformation of the support is met by adopting the system.

Description

technical field [0001] The invention relates to a star sensor bracket test system, in particular to a high-precision star sensor bracket thermal deformation test system. Background technique [0002] In recent years, the demand for high-resolution earth observation has shown a growing trend, which puts forward higher requirements for the spatial resolution, time resolution, spectral resolution and positioning accuracy of optical remote sensing satellites. Structural thermal deformation is one of the important factors affecting the resolution and positioning accuracy of optical remote sensing satellites for earth observation. Rail deformation thermal stability requirements. In order to ensure the normal operation of the payload and the realization of satellite performance indicators, the pointing accuracy of the payload must be controlled and tested in the process of ground design, development, and testing. [0003] The magnitude of thermal deformation of satellite star sen...

AI Technical Summary

Problems solved by technology

In the ground verification test of the thermal stability design of the star sensor support, the traditional test method uses an electronic theodolite to build a station to measure the pointing change of the star sensor. Second-level star sensor pointing accuracy test requirements

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