Attitude Determination Method and Star Sensor Based on Compressed Sensing Imaging

A compressed sensing and star sensor technology, applied in the field of star sensors, can solve problems such as insufficient processing speed and excessive data volume

Active Publication Date: 2019-12-03
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The invention provides an attitude determination method based on compressed sensing imaging and a star sensor to solve the technical problems of excessive data volume and insufficient processing speed faced by existing high-precision star sensors

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  • Attitude Determination Method and Star Sensor Based on Compressed Sensing Imaging
  • Attitude Determination Method and Star Sensor Based on Compressed Sensing Imaging
  • Attitude Determination Method and Star Sensor Based on Compressed Sensing Imaging

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[0046] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0047] refer to figure 2 with image 3 , a preferred embodiment of the present invention provides a method for determining posture based on compressed sensing imaging, comprising steps:

[0048] Step S100 , perform compressed sensing imaging on the starry sky, and obtain an observed star map after compressed sensing imaging.

[0049] The star sensor is a sensitive device that measures the attitude of the star as a reference object. Only a small number of pixels in the star map record the star point information, and most of the other background pixels do not contain useful information, which has natural sparse characteristics. In this embodiment, compressive sensing (Compressive Sensing, CS)...

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Abstract

The invention discloses an attitude determination method based on compressed sensing imaging and a star sensor. The method comprises the steps of performing the compressed sensing imaging on starry sky to acquire an observation star map after the compressed sensing imaging, processing acquired data after the compressed sensing imaging, extracting a star point centroid position in the observation star map after the compressed sensing imaging, calculating a feature of the star point centroid position, matching the feature with a navigation feature database for recognition, and determining the current triaxial orientation of the star sensor.According to a control method of the star sensor based on the compressed sensing imaging and the star sensor, the traditional optical imaging is developed into the compressed sensing imaging based on a compressed sensing theory; the compressed imaging data is processed to achieve attitude determination at a low sampling rate; two-dimensional imaging is not required; high-precision attitude output can be kept by a smaller data size; and compared with the traditional optical imaging, the high cost of the large-field-of-view high precision star sensor in data acquisition, storage and processing is lowered.

Description

technical field [0001] The invention relates to the field of star sensors, in particular to a method for determining an attitude based on compressed sensing imaging and a star sensor. Background technique [0002] The star sensor is a high-precision attitude measurement instrument with stars as the reference object and star map as the processing object. It mainly includes two processes of optical imaging and data processing. figure 1 shown. In the process of optical imaging, a traditional lens camera is used to observe the starry sky pointed by the boresight, and the observed star map is obtained by imaging in an image sensor (CCD or CMOS). The optical imaging system using the traditional star sensor is similar to the lens camera, and its essence is the process of generating the corresponding image point function through the point spread function response of the object point function. However, the current development of star sensors towards large field of view, high precis...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 宋新赵勇尹航杨磊朱效洲王强绳涛陈小前
Owner NAT UNIV OF DEFENSE TECH
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