Autonomous Navigation for Mars Atmospheric Aerobraking based on Optical and Inertial Integrated Method
作者单位：Shanghai Institute of Satellite Engineering Shanghai Key Laboratory of Deep Space Exploration Technology
会议名称：《新型导航技术及应用研讨会》
会议日期：2015年
学科分类：08[工学] 081105[工学-导航、制导与控制] 0811[工学-控制科学与工程]
关 键 词：Mars Exploration Aerobraking Optical Navigation Autonomous Navigation
摘 要：Mars atmospheric aerobraking is an effective way to decrease fuel mass for Mars Probe. Because of the limitation of radio navigation system which uses the ground stations, real-time and high-precision autonomous navigation is required during the atmospheric aerobraking phase to avoid falling into atmosphere or Mars impact. Under the engineering background of Mars atmospheric aerobraking, integrated navigation method based on optical and inertial measurement is proposed. State model affected by aerodynamic force is built and measurement model by optical navigation sensor and inertial measurement unit(IMU) is established. In addition, combined with position information of Mars, Phobos and Deimos in ephemeris, UKF filter algorithm is applied to optimal fusion of navigation information. Simulation results indicate that the integrated navigation method based on optical and inertial measurement is feasible and effective.