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

A technology for determining the method and occlusion area, applied in the directions of instruments, image analysis, image enhancement, etc., can solve the problems of difficulty in carrying out the occlusion analysis of the field of view of the solar sensor, heavy workload, low efficiency, etc., to optimize the mutual positional relationship, The effect of reducing launch weight and launch cost

CN106251335BActive Publication Date: 2018-10-09CHINA ACADEMY OF SPACE TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-10-09

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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.
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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...

Examples

Embodiment Construction

[0032] The implementation process of the present invention will be described in detail below in conjunction with the accompanying drawings. The implementation of the present invention is as figure 1 As shown, the specific steps are as follows:

[0033] (1) Convert the three-dimensional model of the parts that may block the field of view of the sensor (hereinafter referred to as the blocking part) into an STL grid model file;

[0034] Based on the satellite mechanical coordinate system (the origin of the coordinate system is located at the center of mass of the satellite, the positive direction of the x-axis points to the east plate of the satellite, the positive direction of the y-axis points to the south plate of the satellite, and the positive direction of the z-axis is determined according to the right-hand rule), the three-dimensional The model is transformed into an STL meshed model file, which discretizes the surface of the 3D model into a triangular mesh, including the...