Rendezvous and docking microwave radar angle measuring performance system error calibration system and method

Abstract

A rendezvous and docking microwave radar angle measuring performance system error calibration system and a method are disclosed. The calibration system comprises an attitude position adjustment system, a microwave radar measurement system, an external conformance calibration system, and a measurement data acquisition system. The calibration method comprises the following steps: (1) building and preheating a laser tracker; (2) installing a microwave radar antenna and calibrating geometric parameters; (3) acquiring grid-style test data in the full field of microwave radar; and (4) calculating and binding radar angle measuring performance system error. The angle measuring performance system error in the full field of microwave radar can be calibrated, and angle measuring performance calibration under a target large-angle working condition is no longer limited by site factors and the ability of external conformance equipment. After initial geometric parameter calibration, full-automatic calibration work can be carried out. The calibration process is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of testing payloads for aerospace space measurement, in particular to a system error calibration system and calibration method for angle measurement performance of rendezvous and docking microwave radars. Background technique [0002] The rendezvous and docking microwave radar is the key payload for two spacecraft to complete the relative spatial relationship measurement in a long distance and in a large range. It is characterized by high measurement accuracy (less than 0.1°). Before the rendezvous and docking microwave radar leaves the factory, it is necessary to correct the radar angle measurement performance system error caused by factors such as radar antenna front machining error, servo mechanism assembly error, and antenna photoelectric axis inconsistency. Since the system error of radar angle measurement performance caused by the above reasons is non-constant and nonlinear at different measurement an...

AI Technical Summary

Problems solved by technology

The test range of microwave radar ±60°×±60° makes it difficult for ordinary anechoic chambers to meet the requirements; moreover, in order to change the position of the target point in a large range in three-dimensional space, it is necessary to have a large-scale two-dimensional scanning frame, which requires high testing equipment;

[0005] 2) Requires complicated measurement operations

In extreme cases, if it is necessary to calibrate the angle measurement performance at an angle of ±90°, no matter what the size of the two-dimensional scanning frame is, the calibration work cannot be completed

In addition, in order to achieve the purpose of high-precision calibration, this method should have high requirements for the tooling accuracy of microwave radar, the installation accuracy of the target antenna and the flatness of the two-dimensional scanning frame, which will increase the complexity of the calibration process and the manufacturing of measurement equipment. difficulty

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