Vacuum Calibration Auxiliary Device and Thermal Distortion Correction Method for High Precision Star Sensor

A star sensor and auxiliary device technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of affecting the calibration accuracy, indistinguishability, thermal deformation, etc., and achieve the effects of ensuring stability, reducing influence, and isolating heat exchange

Active Publication Date: 2019-03-15
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this type of bracket to calibrate the star sensor under different temperature conditions will easily lead to thermal deformation, and it is impossible to distinguish the thermal deformation of the turntable, bracket and product, which will affect the calibration accuracy

Method used

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  • Vacuum Calibration Auxiliary Device and Thermal Distortion Correction Method for High Precision Star Sensor
  • Vacuum Calibration Auxiliary Device and Thermal Distortion Correction Method for High Precision Star Sensor
  • Vacuum Calibration Auxiliary Device and Thermal Distortion Correction Method for High Precision Star Sensor

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Embodiment Construction

[0034] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] Such as figure 1 merge figure 2 , image 3 As shown, it is an embodiment of a vacuum calibration auxiliary device for a high-precision star sensor, which is connected to a turntable for vacuum calibration. The vacuum calibration auxiliary device for a high-precision star sensor includes: a main mounting frame 110, a mirror assembly 120 and auxiliary support frame 130.

[0036] The main mounting frame 110 adopts a cubic structure, and the interior is hollow to form an accommodating space. The star sensor 210 is arranged in the accommodating space of the main mounting frame 110, and is fastened with the main mounting frame 110 by screws to realize fixing with the main mounting frame 110 connect.

[0037] The main mounting frame 110 corresponds to the side wall of the light entrance of the star sensor 210 , the side wall is defined as t...

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Abstract

An auxiliary apparatus for high-precision star sensor vacuum calibration is disclosed. The apparatus includes a main mounting rack and a reflector assembly, wherein the hollow inside of the main mounting rack forms a holding space, a star sensor is disposed in the holding space and fixedly connected to the main mounting rack, the main mounting rack is provided with an incident light opening corresponding to an incident light port of the star sensor, the reflector assembly is disposed at the incident light opening of the main mounting rack, and an auxiliary support is disposed corresponding to the incident light port of the star sensor, is fixed to the bottom of the holding space of the main mounting rack, is abutted against the bottom of the star sensor in the holding space, applies force on the star sensor, and provides upward supporting for the star sensor so that the star sensor is fixed between the inner walls of the auxiliary support and the main mounting rack. The device is used for highly stable mounting of the star sensor in a vacuum calibration test, reduces influences of thermodynamic environment factors on a calibration result and increases calibration precision of the star sensor.

Description

technical field [0001] The invention relates to a space vehicle vacuum calibration technology, in particular to a high-precision star sensor vacuum calibration auxiliary device and a thermal deformation correction method. Background technique [0002] The star sensor is a key component of the GNC system of the spacecraft, which is mainly used for three-axis attitude measurement and navigation of the spacecraft. With the improvement of star sensor accuracy index requirements, the research and evaluation technology of its low-frequency error is also gradually developed. The main factors causing the low-frequency error of the star sensor are: the residual error of the optical system calibration, the error and chromatic aberration of the star sensor star table, the deformation of the optical-mechanical structure caused by temperature changes, etc.; It is related to the application environment, the suppression technology is difficult, and the process requirements are high. In t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 吴永康胡雄超闫晓军王燕清杜伟峰
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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