高轨遥感卫星光轴指向误差夹角测量系统标定方法研究

Research of calibration method for optical axis pointing error included angle measuring system on high orbit remote sensing satellite

针对空间环境应用中航天器结构形变夹角测量系统因系统误差导致测量精度较低的问题,提出一种基于自准直对比系统的夹角测量系统标定方法。通过该方法对夹角测量仪进行标定后得到标定系数,并应用仿真数据对系数进行验证。验证结果表明,夹角测量系统量程可达到±25′,测量分辨率可达到0.1″。使用标定后的夹角测量系统进行角度检测,并将测量结果与自准直仪进行对比。结果表明,该标定方法简单方便精准度高,计算测量结果与标准值的差值的绝对值,夹角测量仪测量精度达到±0.2″,标定后夹角测量仪精度满足卫星使用要求,该方法的应用将为卫星在轨结构微形变研究提供技术支撑。

A calibration method of the included angle measuring system based on the autocollimation contrast system is proposed.This method is used to improve the accuracy of the included angle measuring system.Therefore,it can accurately measure the deformation of the spacecraft structure in the space environment.The calibration coefficient is achieved by calibrating the included angle measuring system,and the coefficient is evaluated by simulation data.Results shows that the measuring range of the included angle measuring system can be up to±25′and the measuring resolution can be up to 0.1″.Experimental results show that the calibration method is simple and convenient with high accuracy.It proves that the measurement accuracy of the angle measuring instrument reaches±0.2″by computing the absolute value of the difference between the measured results and certified value.In general,the accuracy of the angle measuring instrument after calibration meets the requirements of satellite utilization.This method can provide technical support for the study of micro deformation of satellite structures in orbit.