用于星敏感器的精度测量方法

Precision measurement method for star sensor

Abstract

The invention discloses a precision measurement method for a star sensor, which comprises the following steps of: 1) fixing the star sensor on the earth; 2) inputting time T of measurement starting time relative to J2000.0 into the star sensor; 3) determining the direction vector of J2000.0 right angle coordinate system according to the declination and right ascension as well as apparent motion parameter (alpha', delta') of a navigator star under the J2000.0 coordinate system; 4) converting the direction vector of the navigation star under the J2000.0 right angle coordinate system into the direction vector under an epoch ecliptic coordinate system; 5) converting the direction vector under the epoch ecliptic coordinate system into the direction vector (v CRFT) under a spherical coordinate system; and 6) changing the direction vector of the navigation star under the spherical coordinate system into the direction vector (v TRF) under a fixed ground coordinate system, on the basis of the direction vector (v TRF) under the fixed ground coordinate system, obtaining the precision of the star sensor. According to the method disclosed by the invention, the precision measurement of the starsensor can be easily realized.
本发明公开了一种用于星敏感器的精度测量方法,包括:1)将星敏感器固定在地球上;2)向所述星敏感器输入测试开始时间相对于J2000.0的时间T;3)根据导航星在J2000.0坐标系下的赤纬和赤经以及视运动参数(α′,δ′)确定在J2000.0直角坐标系下的方向矢量;4)将导航星在J2000.0直角坐标系下的方向矢量转换为历元黄道坐标系下的方向矢量;5)将历元黄道坐标系下的方向矢量转变成天球坐标系下的方向矢量(vCRFT);6)将导航星从天球坐标系下的方向矢量变到地固坐标系下的方向矢量(vTRF),并基于所述地固坐标系下的方向矢量(vTRF),获得所述星敏感器的精度。根据本发明的方法,很容易实现该星敏感器的精度测量。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    CN-100348460-CNovember 14, 2007北京航空航天大学一种基于星场的星敏感器校准方法
    CN-101846510-ASeptember 29, 2010北京航空航天大学High-precision satellite attitude determination method based on star sensor and gyroscope
    CN-101893440-ANovember 24, 2010哈尔滨工业大学基于星敏感器的天文自主导航方法
    KR-20010011662-AFebruary 15, 2001이우백, 한국 천문 연구원셔터를 이용한 3축자세 제어용 별 감지 장치
    US-6108593-AAugust 22, 2000Hughes Electronics CorporationMethod and apparatus for estimating attitude sensor bias in a satellite
    US-6691033-B1February 10, 2004Hughes Electronics CorporationSystem and method for calibrating inter-star-tracker misalignments in a stellar inertial attitude determination system

NO-Patent Citations (6)

    Title
    JP平2-147813A 1990.06.06
    JP平3-164398A 1991.07.16
    李葆华等.天文导航中的星敏感器技术.《光学精密工程》.2009,第17卷(第7期),全文.
    杨博.航天器星敏感器自主定位方法及精度分析.《宇航学报》.2002,第23卷(第3期),全文.
    杨博等.一种用星敏感器自主定位方法的精度分析.《航天控制》.2001,(第1期),全文.
    邢飞等.星敏感器参数分析与自主校正.《清华大学学报(自然科学版)》.2005,第45卷(第11期),全文.

Cited By (0)

    Publication numberPublication dateAssigneeTitle