Static multi- light path star simulator

Abstract

A static multi-optical-path star simulator comprises a flange and at least four starlight pipes, wherein each starlight pipe can produce a simulation star, optical spectrum and brightness of each starlight pipe can be separately adjusted, the starlight pipes are installed on the flange by an angular adjustment mechanism, optical axles of two arbitrary star pipes are not parallel, relative angle between two arbitrary star pipes can be adjusted in a range not smaller than 10 degrees, a large amount of simulation constellations with different constructions can be produced, brightness and spectral characteristic of all asterions can be different, geometrical similarity between two arbitrary simulation constellations is relatively low, and physical characteristics of actual star field can be well simulated.

Description

technical field [0001] The invention belongs to the technical field of optical sensors, and relates to a static multi-light path star simulator used for testing the function and accuracy of star sensors under indoor conditions. Background technique [0002] The traditional star sensor is a widely used aerospace product at present. It is an optical attitude sensor with stars as the observation object. It is mainly used for attitude measurement tasks when spacecraft such as satellites and spacecraft fly in orbit. [0003] At present, the star sensor in the usual sense belongs to the star sensor in the form of a star plotter. It first needs to take an image of the starry sky in a certain area, then detect the star images in the image through image processing algorithms, and use star recognition technology to confirm the "identity" of the observed stars, and finally complete the attitude measurement task. [0004] In order to test the performance of the star sensor, it is neces...

AI Technical Summary

Problems solved by technology

However, the multi-light path star simulator also has its limitations, mainly including: 1) the relative angle of each laser diode can only be adjusted within a small range, and the range of changing the simulated constellation configuration is also very limited, that is, the simulated constellations of different configurations The geometric similarity between them is still relatively high; 2) Since laser diodes are sensitive to spikes in the input current, too high or too frequent spikes may cause damage to the diodes, so the requirements for the quality of the power supply used are high, and it is necessary to use Special power supply, and the laser diode cannot be frequently turned on / off during use, or the input power of the laser diode can be changed repeatedly, which may cause damage to the diode; 3) The spectral characteristics of each laser diode are fixed, so Unless another type of laser diode is selected, the spectrum of any one of the simulated stars cannot be changed

[0007] In the real starry sky observed by the star sensor, the brightness and spectral characteristics of any two stars may be different, but the existing static single-light path star simulator and multi-light path star simulator cannot effectively simulate the real starry sky This difference exists in the system, so it affects the test effect of the star sensor to a large extent, and limits its test coverage

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