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空天飞行器往返于大气层内外,持续工作时间长。捷联惯性/天文组合导航自主性强、隐蔽性好,是最适合空天飞行器的导航方式之一。为提高传统天文定位的导航精度和可靠性,解决其在机载应用中水平基准制约的问题,分析了平台误差角和位置误差对高度角量测的影响,提出了一种以天体高度角为量测信息的捷联惯性/天文深组合导航算法。该算法采用卡尔曼滤波器进行最优估计,可有效估计并补偿系统的姿态误差,减少天文导航定位对水平基准的依赖。仿真表明,单星观测条件下,导航系统姿态误差快速收敛,定位的均方根误差在200 m以内,且系统导航性能随导航星数量的增加而提高。
Aerospace aircraft and from the atmosphere inside and outside, continuing to work long hours. Strapdown Inertia / Astronomy combined navigation autonomy is strong, concealed, is the most suitable spacecraft navigation method. In order to improve navigation accuracy and reliability of traditional astronomical positioning and solve the problem of horizontal reference control in airborne applications, the influence of platform error angle and position error on altitude angle measurement is analyzed. Strapdown Inertial / Astronomical Deep Integrated Navigation Algorithms for Measurement Information. The algorithm uses Kalman filter to make optimal estimation, which can effectively estimate and compensate the attitude error of the system and reduce the reliance on astronomical navigation positioning on the horizontal datum. The simulation results show that the attitude error of the navigation system converges rapidly under single-star observation conditions with the root mean square error of positioning within 200 m, and the navigation performance of the navigation system increases with the increase of the number of navigation stars.