Low-frequency error measuring method for star sensor

A star sensor and low-frequency error technology, which is applied in the field of star sensor error measurement and star sensor low-frequency error measurement, can solve the problem of no low-frequency error, etc., and achieve the effect of improving measurement accuracy

Active Publication Date: 2012-07-11
BEIJING INST OF CONTROL ENG
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Problems solved by technology

Due to the limitation of test conditions, currently domestic star

Method used

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  • Low-frequency error measuring method for star sensor
  • Low-frequency error measuring method for star sensor

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Embodiment Construction

[0013] Such as figure 1 As shown, the dotted line on the left side of the figure is a bell-type vacuum simulation equipment system, which is composed of a vacuum bell, a shock isolation table, a three-dimensional translation and a two-dimensional rotation device, figure 1 The dotted line on the middle right side is the measurement equipment, which is composed of the self-collimating collimator 1, the static multi-light path star simulator 2, the adjustment bracket 3, the measurement system 4 and the laser aligner 5, and the adjustment bracket 3 is used for Align the self-collimating collimator 1 with the reference mirror of the star sensor, and align the static multi-optical path star simulator 2 with the optical axis of the star sensor; the self-collimating collimator is used to measure the rotation angle of the reference mirror, and the star needs to be simulated during the test. The main optical axes of the autocollimator 2 and the collimator 1 are respectively aligned with...

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Abstract

The invention discloses a low-frequency error measuring method for a star sensor, and builds a low-frequency error measuring system comprising an auto-collimating collimator, a static multi-optical path star simulator, an adjusting bracket, a measuring system and a laser sight, wherein the star sensor is mounted on a vibration isolation table; a vacuum bell jar is used for providing a vacuum environment for the star sensor; a glass window is arranged on the vacuum bell jar; the transmittivity of the glass window is not less than 95 percent; and the star point imaging positions of the star sensor and the auto-collimating imaging positions of an optical datum mirror are monitored and measured at different temperatures under vacuum conditions, so as to fulfill the measuring of the low-frequency error of the star sensor. The invention further provides a measuring system to analog fixed stars of different spectra independently or simultaneously while measuring the auto-collimating angle of the optical datum mirror, and monitor and measure the star point imaging positions of the star sensor and the auto-collimating imaging positions of the optical datum mirror, so as to improve the measuring accuracy.

Description

technical field [0001] The invention relates to a method for measuring the error of a star sensor, in particular to a method for measuring the low-frequency error of a star sensor, and belongs to the technical field of testing. Background technique [0002] With the gradual development of star sensor products and the gradual increase in the requirements for attitude accuracy, the low-frequency error of star sensors has become an important factor restricting the development of star sensors. The cause analysis and testing of low-frequency errors have attracted great attention , the low-frequency error is an important error source for the star sensor to affect the satellite attitude measurement accuracy, which mainly includes two parts: the field-of-view related error and the thermal influence error. The low-frequency error includes the main error characteristics of the star sensor's output attitude, such as field of view space error, pixel space error, time domain error, and t...

Claims

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Application Information

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IPC IPC(8): G01C25/00
Inventor 李春艳卢欣钟红军武延鹏黄欣赵春晖张巍李春江李玉明宋彧严微
Owner BEIJING INST OF CONTROL ENG
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