舰船科学技术
艦船科學技術
함선과학기술
SHIP SCIENCE AND TECHNOLOGY
2015年
1期
98-101,111
,共5页
天文标校%轴系误差%坐标转换
天文標校%軸繫誤差%坐標轉換
천문표교%축계오차%좌표전환
celestial calibration%axial system error%coordination convertion
标校是舰载天文经纬仪的一个重要环节，其标校的结果直接影响设备的精度。通过对天文经纬仪轴系的分析以及建立坐标系之间的线性变换关系，推导出天文经纬仪轴系误差模型。最后研究轴系误差的星校方法，对全天分布均匀的恒星进行观测，得到观测误差的实验数据，利用最小二乘法进行拟合解算出模型的参数。实验结果表明，通过星校技术进行轴系误差标校，可将指向精度提高10倍左右，满足设备总体要求。
標校是艦載天文經緯儀的一箇重要環節，其標校的結果直接影響設備的精度。通過對天文經緯儀軸繫的分析以及建立坐標繫之間的線性變換關繫，推導齣天文經緯儀軸繫誤差模型。最後研究軸繫誤差的星校方法，對全天分佈均勻的恆星進行觀測，得到觀測誤差的實驗數據，利用最小二乘法進行擬閤解算齣模型的參數。實驗結果錶明，通過星校技術進行軸繫誤差標校，可將指嚮精度提高10倍左右，滿足設備總體要求。
표교시함재천문경위의적일개중요배절，기표교적결과직접영향설비적정도。통과대천문경위의축계적분석이급건립좌표계지간적선성변환관계，추도출천문경위의축계오차모형。최후연구축계오차적성교방법，대전천분포균균적항성진행관측，득도관측오차적실험수거，이용최소이승법진행의합해산출모형적삼수。실험결과표명，통과성교기술진행축계오차표교，가장지향정도제고10배좌우，만족설비총체요구。
Calibration is critical to the accuracy of the ship-borne celestial theodolite. In this paper, error model was derived by alalyzing the axial of celestial theodolite and building the relation of linear transformations between coordinates. Based on the error model, the method of celestial theodolite calibration with star was studied. Some stars scattered in sky space uniformly are selected for measuring. And the discrete values of the stars′ pointing errors were obtained in azimuth and elevation dimensions respectively. By the method of least squares, the coefficients in the error model were obtained. Experimental results indicate that the pointing accuracy can be increased about 10 times, which meets the request of general design.
