Star sensor with high data update rate

Abstract

The invention relates to a star sensor with high data update rate, comprising an optical system and an electronic system. The optical system comprises an optical lens and a beam splitting prism. The electronic system comprises three EMCCD imaging units, data processing units connected in one-to-one correspondence with the EMCCD imaging units, an exposure timing control unit, and a data integrationand system monitoring unit. The beam splitting prism is used for respectively and uniformly projecting light passing through the optical lens to the three EMCCD imaging units for imaging in the EMCCDimaging unit. Each data processing unit is used for processing an image acquired by the corresponding EMCCD imaging unit. The exposure timing control unit is used for synchronously controlling the operation timing of the three EMCCD imaging units and the data processing units. The data integration and system monitoring unit is used for performing image output on the images of the data processingunits with the sum of the exposure frequencies of the three EMCCD imaging units. The invention can achieve the purpose of improving the data update rate of the star sensor.

Description

technical field [0001] The invention relates to the technical field of attitude measurement sensitive equipment and star sensors, in particular to a star sensor with a high data update rate. Background technique [0002] The measurement principle of the star sensor is to measure the component of the star vector in the star sensor coordinate system by imaging the starry sky, and then use the known precise position of the star to determine the three-axis attitude of the carrier relative to the inertial coordinate system. Traditional star sensors generally perform slow and high-precision attitude measurement in stable carrier platforms such as satellites to correct inertial navigation drift. In recent years, with the continuous development of satellite-inertial integrated navigation technology, the requirements for star sensors are getting higher and higher. It is urgent to increase the attitude measurement sampling frequency of star sensors in order to perform accurate high-ti...

AI Technical Summary

Problems solved by technology

Due to the limitations of focal length, volume and weight, the aperture of the star sensor optical system cannot be greatly increased. At present, the integration time of most star sensors needs to be 30ms to 100ms. Even if the optimized algorithm shortens the data processing time, the data update rate can only reach 5Hz to 10Hz , and under the existing star sensor architecture, the data update rate is difficult to further improve

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