The invention provides an in-orbit calibration method and system for thrust direction deviation of an orbit control engine of a deep space probe. The in-orbit calibration method comprises the steps of1, calculating the projection of speed increment of an orbit control stage on a deep space probe body system through remote measurement of an accelerometer; 2, calculating the speed increment contributed by the attitude control thruster according to the air injection duration of the attitude control thruster in the orbit control stage; 3, calculating the speed increment contributed by the orbit control engine according to the speed increment contributed by the attitude control thruster and the speed increment in the orbit control stage; and 4, calculating the deviation of the thrust directionof the orbit control engine according to the measured speed increment of the orbit control engine. The in-orbit calibration method is suitable for in-orbit calibration of thrust direction deviation of the orbit control engine of the deep space probe, and calibration parameters can be used for ignition attitude correction of subsequent orbit control activities, so that the orbital transfer precision of the probe is improved, and fuel consumption is reduced.

    本发明提供了一种深空探测器轨控发动机推力方向偏差在轨标定方法和系统,包括:步骤1:通过加速度计遥测计算轨控阶段的速度增量在深空探测器本体系上的投影;步骤2:根据轨控阶段姿控推力器的喷气时长,计算姿控推力器贡献的速度增量;步骤3:根据姿控推力器贡献的速度增量和轨控阶段的速度增量,计算轨控发动机贡献的速度增量;步骤4:根据测得的轨控发动机的速度增量,计算轨控发动机推力方向的偏差。本发明适用于深空探测器轨控发动机推力方向偏差的在轨标定,标定参数可用于后续轨控活动的点火姿态修正,以提高探测器变轨精度,减少燃料消耗。


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    Title :

    In-orbit calibration method and system for thrust direction deviation of orbit control engine of deep space probe


    Additional title:

    深空探测器轨控发动机推力方向偏差在轨标定方法和系统


    Contributors:
    ZHAO XUNYOU (author) / FANG BAODONG (author) / ZHANG WEI (author) / XIN SIBO (author) / WANG WEI (author) / CHU YINGZHI (author)

    Publication date :

    2021-01-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64G Raumfahrt , COSMONAUTICS



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