Integration star sensor based on biology compound eye structure and use thereof

Abstract

An integral star sensor based on biological compound eye structure and the application thereof; the star sensor is set as multi field coverage star sensor based on biological compound eye structure, and forms each independent small eye by the electro-optical imaging system in the small field coverage and forms the large field coverage star sensor by a plurality of small eyes; the optical channel between the optical lens and image sensor CCD / APS in the electro-optical imaging system is round hole; in the large field coverage star sensor, the small eyes are located at the semicolumn surface or hemisphere surface, and the optic axis of the small eye is orthometric with axis of the column; the fields coverage of the adjacent small eyes are not overlapped. The invention uses a plurality of independent small field coverage with high spatial resolution to realize the large field coverage to take more stars, which greatly increases theta sep and realizes to improve the precision of the star sensor from two aspects of n and theta sep.

Description

technical field [0001] The invention belongs to the technical field of attitude sensors, and in particular relates to a bionic star sensor star map ingestion and star pair extraction used in aviation, navigation and missile autonomous navigation, and an integrated star sensor based on a biological compound eye structure that improves the accuracy of the star sensor. sensor. Background technique [0002] The star sensor is one of the important components of the spacecraft attitude measurement system. It uses the identification of the star orientation to provide the spacecraft with a three-axis attitude in the inertial coordinate system. Compared with other attitude measurement components such as sun sensors, star sensors have the advantages of high precision, high reliability, and strong ingestion and tracking capabilities, so they have become necessary instruments for various spacecraft attitude measurements. Star sensors can be used in aviation, navigation and autonomous n...

AI Technical Summary

Problems solved by technology

[0021] 1. Increasing the field of view is limited by the resolution of CCD / APS;

[0022] 2. Increasing the field of view will inevitably increase the length of the hood, which is not conducive to the miniaturization of the star sensor;

[0023] 3. Increasing the star-to-star angular distance is limited by the size of the star map and the number of stars taken;

[0024] 4. Based on a single field of view, simultaneously from n and θ sep The potential for improving star sensor accuracy is limited in two respects;

[0025] 5. The ability to improve the accuracy of single-satellite measurement by using algorithms such as sub-pixel correlation positioning methods is limited;

[0026] 6. Orthogonal installation of multiple ordinary star sensors has engineering installation problems, and is not conducive to the miniaturization requirements of spacecraft for star sensors

Images