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Automatic accurate measurement method for satellite large-size planar array SAR antenna

A large-scale, antenna technology, applied in the field of automatic precision measurement of large-scale planar array SAR antennas for satellites, can solve the problems of low measurement accuracy, time-consuming and labor-intensive, slow speed, etc., to improve angle measurement accuracy, reduce labor intensity, The effect of a quick measurement

Inactive Publication Date: 2014-10-08
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

[0005] When the theodolite measurement system is measuring a point, two theodolites are required for calibration and measurement, and two people are required to manually aim at the point. The measurement accuracy is low and the speed is slow.
During the antenna deployment process, multiple measurements are required, which is time-consuming and manpower-intensive

Method used

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  • Automatic accurate measurement method for satellite large-size planar array SAR antenna
  • Automatic accurate measurement method for satellite large-size planar array SAR antenna
  • Automatic accurate measurement method for satellite large-size planar array SAR antenna

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Embodiment Construction

[0025] The measurement process of the present invention will be described in detail below in conjunction with the accompanying drawings. These descriptions are only illustrative and are not intended to limit the protection scope of the present invention.

[0026] figure 1 Paste the reflective mark points for the SAR antenna front. In the figure, the black dots represent the mark points. On the single antenna front 2 panel, 192 mark points are evenly pasted. The actual retroreflective marker points such as figure 2 As shown, the outside is a black area, and the inner circle is a white reflective area. The internal reflection brightness is hundreds of times higher than that of the outside, which is convenient for the radar to extract the circular boundary and obtain the center of the mark point.

[0027] image 3 It is a schematic diagram of the layout of the large-scale planar array SAR antenna automatic precision measurement method. The satellite is placed horizontally, and...

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Abstract

The invention discloses an automatic accurate measurement method for a satellite large-size planar array SAR antenna. The method comprises the steps that target points on the antenna array surface are measured through a laser radar measuring system, and the least square fit is utilized for calculating the array surface planeness and the plane normal direction; a transit measuring system is utilized for measuring a satellite benchmark mirror and a public target ball point so as to build the relation between the public target ball point and a satellite mechanical coordinate system; laser radar is utilized for measuring the public target ball point so as to build the relation between the satellite mechanical coordinate system and a laser radar measuring coordinate system, and finally the antenna array surface normal direction under the satellite coordinate system is obtained; in multiple antenna unfolding tests, the radar single-point automatic measurement function is utilized, plane measurement conducted after unfolding is automatically completed, and unfolding planeness and pointing repeatability are evaluated. According to the automatic accurate measurement method for the satellite large-size planar array SAR antenna, the planeness and pointing accuracy of the antenna can be automatically measured with high precision, the requirement for precision of plane point coordinate precision being 0.2 mm and angle measurement precision being 20'' within 30 m is met, and measurement efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of industrial measurement, and in particular relates to an automatic precision measurement method for a satellite large-scale planar array SAR antenna. Background technique [0002] With the increasing demand for satellite antennas, the size of antennas is getting larger and larger, and the requirements for profile and installation accuracy are also getting higher and higher. The precision measurement of SAR antenna is a key link in the quality control of the development of the satellite, and its installation accuracy and SAR antenna deployment configuration directly affect the quality of the satellite's in-orbit imaging. The SAR antenna can be composed of multiple antenna panels. During the assembly process, it is necessary to measure the overall flatness of the antenna after it is installed on the satellite and the pointing accuracy of the array in the satellite mechanical coordinate system. The measuremen...

Claims

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Application Information

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IPC IPC(8): G01B21/00G01B11/30G01C1/02
Inventor 陶力刘笑易旺民张彬徐奕柳赵书萍郭洁瑛王伟郑鹏阮国伟张天春刘浩淼唐赖颖
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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