结合天文观测角量测的机载惯性/天文深度组合算法  

Airborne INS/CNS Deeply Integrated Algorithm on Celestial Angle Observation

作　　者：屈蔷[1] 刘建业[1] 熊智[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《南京航空航天大学学报》2011年第6期765-769,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(60904091;91016019;61104020)资助项目;南京航空航天大学基本科研业务费专项科研(NS2010072)资助项目

摘　　要：针对姿态误差对天文观测角度量测的影响,提出结合天文观测角度量测的机载惯性/天文深度组合算法。在位置误差小角度关系分析的基础上,进一步分析惯导姿态误差引入的计算地理水平坐标系与当地地理坐标系之间的姿态误差小角度关系,推导并建立基于天文高度角和方位角量测的深组合惯性/天文量测方程,针对天文观测量测对高度通道不可观,增加气压高度为量测量,设计相应组合滤波方法。该方法充分考虑了姿态误差对于天文观测的影响,仿真验证表明所设计方案可以有效消除惯导系统陀螺累积误差,提高惯导系统的姿态精度,验证了其可行性。Aims at the influence of attitude errors on the celestial angle observation,a new deeply algorithm of airborne INS/CNS integrated navigation based on celestial angle observation is presented.According to the analysis of the position angle errors,the attitude angle errors between the geographic coordinate and the calculating coordinate are analyzed.Then the deeply integrated observation equations based on the celestial height and azimuth angle are established.Due to the height information cannot be got through the angle observation,the air height is introduced to the system.Because of attitude errors＇ affection on celestial observation,the presented algorithm is suitable for the INS/CNS integrated system.Finally,a flight model is used as an illustrate example and the simulation results show the effectiveness and feasibility of the proposed method.

关 键 词：天文导航系统 惯性导航系统 深组合 天文观测 

分 类 号：V249[航空宇航科学与技术—飞行器设计]