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ISAR imaging test high precision pointing device

A pointing device, high-precision technology, used in measurement devices, radio wave reflection/re-radiation, utilization of re-radiation and other directions, can solve the problems of fast speed, small target, difficult to capture, etc., to achieve the effect of simple structure and convenient installation

Active Publication Date: 2017-07-07
BEIJING INST OF SPACECRAFT SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because space targets such as Tiangong-1 and the International Space Station have high orbits, small targets, and extremely fast speeds, it is extremely difficult to capture them. Minor errors in ground tooling adjustments and pointing accuracy can lead to the loss of space target capture

Method used

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  • ISAR imaging test high precision pointing device

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Experimental program
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Embodiment Construction

[0026] The present invention proposes a high-precision pointing device for ISAR imaging test, such as figure 1 shown. This device divides the pointing adjustment process of the SAR antenna into two steps, which are horizontal rotation and vertical rotation; the horizontal rotation corresponds to the horizontal rotation body, and the vertical rotation corresponds to the vertical rotation body, as follows The realization process of each part is introduced in detail.

[0027] (1) Antenna panel bracket

[0028] Antenna panel bracket 1 is an independent rigid body bracket, such as figure 2 shown. The SAR antenna is installed on the antenna panel support 1, which can ensure the parallelism of the antenna panel and the horizontal plane. In this example, the parallelism of the antenna panel and the horizontal plane can reach better than 0.01°; when the pose is adjusted, the SAR antenna and the antenna panel The bracket 1 moves together as an integral assembly.

[0029] (2) Verti...

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Abstract

The invention provides an ISAR imaging test high precision pointing device which comprises an antenna panel bracket, a horizontal direction rotation body, a vertical direction rotation body. According to the scheme, a bottom bracket is driven through a rotating motor, thus the bottom bracket rotates around a steering bearing device, and the vertical direction high pointing precision adjustment is realized through a fine adjustment locking device. A steering support bracket is lifted through a lifting motor, through the rotation of a rotation shaft in a rotation shaft bracket U-shaped groove, the horizontal direction high pointing precision adjustment is realized. According to the ISAR imaging test high precision pointing device, the ISAR imaging test high precision pointing is realized, a space target image is successfully captured, a data support is provided for satellite-earth radio link closed loop verification and on-orbit image index prediction estimation, and a reference is provided for the subsequent development of an SAR antenna.

Description

technical field [0001] The invention relates to a high-precision pointing device for an ISAR imaging test, which belongs to the field of ISAR ground test equipment in the field of remote sensing. Background technique [0002] GF-3 satellite is a C-band multi-polarization synthetic aperture radar imaging satellite with high-resolution imaging capability. The GF-3 satellite has high reliability requirements. In order to meet the imaging index requirements at the end of its 8-year life, it is necessary to fully verify the functional performance of the SAR subsystem and SAR antenna on the ground. Conventional electrical testing and various environmental tests in the final assembly plant cannot complete the closed-loop verification of the wireless link between the satellite and the ground. At the same time, due to the large size of the GF-3 satellite SAR antenna, it is impossible to conduct wireless imaging tests through airborne flying or ground sports cars. Therefore, the over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9064
Inventor 孟庆平张运袁宝峰樊俊峰姚猛苏慕萍王建军王小红
Owner BEIJING INST OF SPACECRAFT SYST ENG