Spacecraft optical sensor view field analysis method based on vector projection

Abstract

The invention provides a spacecraft optical sensor view field analysis method based on vector projection. The spacecraft optical sensor view field analysis method based on vector projection comprises the steps that firstly, in a satellite model with the optical sensor configuration and layout design completed, the center coordinate of a sensor view field, the coordinates of all target points on the shielding edge of a shielding object, and the included angles between all axes of a spacecraft body system and all axes of a sensor measurement coordinate system are obtained, and a body system-to-measurement coordinate system transformation matrix is obtained; secondly, the coordinates of all target vectors of the shielding edge in the sensor measurement coordinate system are calculated, and the polar coordinates of all the target vectors of the shielding edge in the sensor measurement coordinate system are obtained; thirdly, the criterion is formed according to a shielding area, and a shielding area result is obtained; fourthly, the component of the sun-direction vector in the body coordinate system under a specific posture track condition is obtained, and the polar coordinates of the sun-direction vector in the sensor measurement coordinate system are obtained; and finally, the sun shielding effectiveness and the view field irradiation condition are judged according to the criterion.

Description

technical field [0001] The invention relates to a method for shielding the field of view of an optical sensor, analyzing the sun's motion in the field of view of the sensor, and analyzing the illumination of the field of view in the overall design of a spacecraft. Background technique [0002] In the configuration and layout design of the overall design of the spacecraft, the layout of the optical sensors needs to be determined in conjunction with the field of view and usage requirements of the sensors when the spacecraft is in orbit. The field of view occlusion and illumination analysis of the optical sensor provides an important basis for the layout design of the sensor. [0003] The optical sensors configured on the spacecraft can be divided into two categories: one is the sensor that depends on the sun to work normally (such as the sun sensor, etc.), and the other is the sensor that needs to avoid the sun to work normally (such as the star sensor). sensors, etc.). In t...

AI Technical Summary

Problems solved by technology

In the current traditional optical sensor layout design, only the three-dimensional model of the optical sensor layout on the spacecraft is combined with the visual effect of the sensor field of view model to qualitatively confirm the occlusion of the sensor, which is imprecise and prone to omissions Defects

Secondly, in the design of the spacecraft control system, it is often necessary to give the quantitative calculation results of the occluded area of ​​the optical sensor as the input of the control system design and on-orbit operation, and this traditional field of view analysis method cannot meet the requirements of accurate quantitative analysis. need

Thirdly, the traditional method cannot analyze the projected movement of the sun in the field of view of the sensor under the specific attitude and orbit conditions of the spacecraft, so it is impossible to analyze the effectiveness of the sun’s occlusion and the illumination of the field of view (for sensors that need to avoid the sun ) for precise quantitative analysis

[0004] With the development of spacecraft system engineering technology, the requirements for spacecraft development are becoming more and more refined. The traditional optical sensor field of view analysis method can no longer meet the requirements of quantitative calculation and high precision. A new analysis method is urgently needed to realize Quantitative calculation of the occlusion area of ​​the sensor's field of view, analysis of the sun's projection motion under specific orbital attitude and orbital conditions, and accurate calculation and analysis of the effectiveness of the sun's occlusion and the illumination of the field of view

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