Cruise section autonomous navigation position deviation correction method

Abstract

The invention discloses a cruise section autonomous navigation position deviation correction method, and belongs to the technical field of deep space detection. The method comprises the following steps: establishing the dynamic model of a detector, and linearizing the dynamic model; establishing an autonomous navigation measurement model, obtaining the gray images of a visible planet by an opticalnavigation camera, and carrying out space-borne image processing to complete the identification and tracking of the mass center of the visible planet; determining the initial orbit of the detector; correcting the position of the visible planet according to relative position information between the visible planet and the detector; correcting visible planet mass center angle position observation information through relative speed information between the visible planet and the detector in order to obtain an accurate observation model; and resolving the real-time state of the detector based on anonlinear system filtering algorithm according to the dynamic model and the measurement model in order to realize real-time navigation. The method can improve the estimation accuracy and the filteringconvergence speed of a cruise section autonomous navigation method, realizes the rapid and accurate estimation, and provides a support for the design of deep space detection cruise segment navigationschemes.

Description

technical field [0001] The invention relates to a method for correcting position deviation of autonomous navigation in a cruising segment, and belongs to the technical field of deep space detection. Background technique [0002] Deep space exploration is the main way for human beings to understand the formation and evolution of the universe and the solar system, and to explore the origin of life. The cruising segment is the longest orbital segment of deep space exploration. This stage has inaccurate dynamic models and ephemeris data, long flight time, etc. features. The attitude information in the cruise segment mission is determined by the star sensor, and the position estimate still relies on the ground communication station. However, during the flight, if the ground measurement and control station is completely relied on for detector navigation, the burden on the ground station will be seriously increased; in addition, when the communication system fails temporarily or p...

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Problems solved by technology

[0004] Aiming at the problems of limited number of asteroids, influence by screening criteria, large ephemeris error, and relative motion between the detector and the observed celestial body in the autonomous navigation method of the cruising segment using asteroid measurement in the prior art, the present invention discloses An autonomous navigation position deviation correction method for the cruising segment, the technical problem to be solved is to improve the estimation accuracy and filtering convergence speed of the cruising segment autonomous navigation method, realize the fast and accurate estimation of the detector state, and provide a design for the navigation scheme of the deep space exploration cruising segment provide technical support

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