A method for determining the occlusion area of ​​the sensor's field of view based on the stl grid model

Abstract

The invention relates to an STL gridding model based sensor field-of-view shielding area determination method, which comprises the steps of (1) converting a three-dimensional model of a shielding component into an STL gridding model file; (2) extracting STL gridding data of the shielding component; (3) processing the STL gridding coordinate data of the shielding component, and converting the STL gridding coordinate data into plane included angle data; (4) converting a sensor field-of-view range into plane included angle data; (5) comparing the plane included angle data of the shielding component and the plane included angle data of the sensor field-of-view range, and judging shielding conditions of the sensor field-of-view by the component; and (6) drawing a sun sensor field-of-view shielding diagram, and calculating the shielding area the shielding rate. According to the invention, shielding conditions of each quadrant of the sun sensor field-of-view, the specific shielding area and the shielding rate can be provided quantitatively, a detail shielding distribution range is provided, the calculation efficiency is improved, and a reference basis is provided for an optimized design of component layout at the same time.

Description

technical field [0001] The invention relates to a method for determining an occlusion area of ​​a sensor field of view based on an STL grid model, and belongs to the technical field of satellite design. Background technique [0002] The sun sensor is an important measurement component of the satellite attitude control system, and it is also the earliest optical attitude sensor used for satellite attitude measurement. The sun sensor is an instrument that obtains satellite attitude information by being sensitive to sunlight, so it has higher requirements for the field of view. Due to the needs of the platform layout, other components may block the field of view of the sun sensor to a certain extent, affect the performance of the sun sensor, and then affect the normal operation of the satellite attitude control system. [0003] In order to meet the relevant requirements of the field of view of the sun sensor, ensure the accuracy and reliability of the satellite attitude measur...

AI Technical Summary

Problems solved by technology

[0005] (1) can only use the geometric analysis method to obtain the maximum angle of the solar sensor field of view without being blocked by drawing in the three-dimensional software;

[0006] (2) It is impossible to quantify the occlusion of each quadrant of the field of view of the sun sensor;

[0007] (3) Since only the human working map is used, the specific area and occlusion rate of the field of view of the sun sensor cannot be given quantitatively;

[0008] (4) It is not possible to intuitively give the detailed distribution range of the sun sensor's field of view being blocked;

[0009] (5) Some occlusion parts, such as the antenna, may still rotate or unfold. If the occlusion situation in various states is considered, the 3D model needs to be adjusted manually, and the occlusion situation in various states is analyzed separately, and the workload is relatively large. ,low efficiency;

[0010] (6) For components with simple geometric shapes, previous methods can still perform occlusion analysis. If the occlusion problem of components with complex geometric shapes is involved, it is difficult to carry out the occlusion analysis of the field of view of the sun sensor

Images