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Autonomous Navigation Method for Low-Thrust Interplanetary Vehicles

机译:低推力行星际飞行器的自主导航方法

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An autonomous navigation method for low-thrust interplanetary vehicle is proposed. In the proposed navigation system, one inertial navigation system (INS) is employed to continuously estimate the position and attitude of vehicle, and three X-ray sensors observing X-ray pulsars are utilized to reduce the long-term effects of the errors in the INS. In addition, a modified square-root unscented Kalman filter (MSUKF) is proposed. The MSUKF adopts a fading factor to compensate the impact of modeling error, and contains no linearization steps. The results have shown that the proposed navigation system outperforms the traditional celestial-inertial method and the MSUKF could guarantee a faster convergence compared with former proposed nonlinear filters. (C) 2015 American Society of Civil Engineers.
机译:提出了一种低推力行星际飞行器的自主导航方法。在所提出的导航系统中,采用了一个惯性导航系统(INS)来连续估计车辆的位置和姿态,并利用三个观测X射线脉冲星的X射线传感器来减少误差的长期影响。 INS。此外,提出了一种改进的平方根无味卡尔曼滤波器(MSUKF)。 MSUKF采用衰落因子来补偿建模误差的影响,并且不包含线性化步骤。结果表明,所提出的导航系统优于传统的天地惯性方法,并且与以前提出的非线性滤波器相比,MSUKF可以保证更快的收敛速度。 (C)2015年美国土木工程师学会。

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