天文定位中倾角传感器的标定

为提高天文定位系统的定位精度,减小倾角传感器安装误差对系统水平测量精度的影响,对系统中倾角传感器的安装参数标定及校正进行了研究.首先,给出基于倾角传感器的天文定位系统工作原理,分析倾角传感器安装过程中存在的误差源.然后,提出一种通过对天文定位系统进行改造,利用系统自身完成倾角传感器安装参数标定的方法,并给出了倾角测量数据的校正算法.最后,建立三视场天文定位系统仿真测试平台,对标定方法的性能进行了分析和验证.实验结果表明:该倾角传感器安装参数标定方法的标定精度与倾角传感器自身测量精度保持一致,在全量程范围内校正后的倾角测量结果最大误差为4.315 5″,基本满足天文定位系统中高精度倾角测量要求.

Calibration of Inclinometer in Celestial Positioning System

In order to improve the precision of celestial positioning system,and decrease the influence of the inclinometer installation error on the level measurement,the calibration and correction of the installation parameters of inclinometer in celestial positioning system were studied.First,the working principle of celestial positioning system based on inclinometer was presented,and the error sources in the installation process of inclinometer were analyzed.Then,a method for calibrating the installation parameters of inclinometer was proposed by transformation of celestial positioning system,and the correction algorithm of inclination measurement was presented.Finally,the simulation platform of three fields of view celestial positioning system was established,and the performance of the calibration method was analyzed and verified.Experimental results indicate that the calibration accuracy of the installation parameters of inclinometer is consistent with the accuracy of the sensor,and the maximum error of the inclination measurement is 4.315 5" in full-range,which can satisfy the requirement of the high-precision level measurement of celestial positioning system.