Autonomous navigation method based on unbiased minimum-variance estimation during Mars entry

作者：Fu Huimin; Yang Yusong; Xiao Qiang; Wu Yunzhang^*; Zhang Yongbo

来源：Advances in Space Research, 2015, 55(5): 1512-1528.

DOI：10.1016/j.asr.2014.12.020

• Autonomous navigation
• Measurement systematic errors
• Unknown inputs
• Extension of unbiased minimum-variance
• Mars entry

Accurate navigation systems are required for future pinpoint Mars landing missions. A radio ranging augmented inertial measurement unit (IMU) navigation system concept is considered for the guided atmospheric entry phase. The systematic errors associated to the radio ranging and inertial measurements, and the atmospheric mission uncertainties are considered to be unknown. This paper presents the extension of an unbiased minimum-variance (EUMV) filter of a radio beacon/IMU navigation system. In the presence of unknown dynamics inputs, the filter joins the system state and the unknown systematic error estimation of a stochastic nonlinear time-varying discrete system. 3-DOF simulation results show that the performances of the proposed navigation filter algorithm, 100 m estimated altitude error and 8 m/s estimated velocity error, fulfills the need of future pinpoint Mars landing missions.

• 出版日期2015-3-1
• 单位北京航空航天大学