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中文摘要：
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。
英文摘要：
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.
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