摘要
为提高船用星敏感器姿态测量精度,对星敏感器船体姿态测量误差模型进行了理论分析。首先针对船用星敏感器的使用环境构建了船用星敏感器观测模型,然后推导了基于角度测量的船用星敏感器误差模型,最后仿真分析了星敏感器地平滚动角测量误差、安装角度对船体姿态测量精度的影响。误差模型与仿真结果表明,星敏感器地平姿态测量误差、安装角度标定误差以及安装布局等是影响船体姿态测量精度的主要因素,其中当星敏感器地平滚动角测量误差为100″时,船体姿态测量误差最大可达112″;安装布局对船体姿态测量精度有一定的影响,其中船体姿态测量误差随安装方位角的变化而呈周期性振荡趋势,纵摇测量误差随安装仰角的增加而增大;当星敏感器沿艏艉线方向安装时,航向测量误差随安装仰角的增加而增大,当沿垂直于艏艉线方向布局时,横摇测量误差随安装仰角的增加而增大。
In order to improve the precision of ship-borne star sensor, the attitude error model is theoreticalanalyzed in this paper. Firstly, in view of the actual working environment on the ship, the observationmodel of ship-borne star sensor is constructed. Then the error model expressions based on angle observation are deduced. Finally, the horizontal roll angle error and installation angle of ship-borne star sensorthat can influence the ship attitude precision are analyzed by simulation. The results of theoretical analysisand simulation indicate that the horizontal roll angle measurement error, the calibration error of installationangle and the installation layout of the ship-borne star sensor on the ship are the main factors of the shipattitude measurement precision. For example, as the horizontal roll angle error is 100＂, the ship attitudeerror can reach 112＂. The installation layout of the ship-borne star sensor has some effects on precision, inwhich the ship attitude error oscillates with increasing installation azimuth, the pitch angle error increaseswith installation elevation. When the star sensor is arranged along the fore and aft line, the course error increases with the increasing installation elevation, and when orthogonal to the fore and aft line, the ship rollerror increases with the increasing installation elevation.
出处
《电讯技术》
北大核心
2014年第2期218-223,共6页
Telecommunication Engineering
