Deep space probe autonomous navigation method based on inter-satellite time delay measurement
A deep space probe, time delay technology, applied in mapping and navigation, navigation, astronomical navigation and other directions, can solve the problems of high operating cost and difficult to meet high-precision real-time navigation.
Active Publication Date: 2020-09-04
CENT SOUTH UNIV
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[0004] The present invention provides an autonomous navigation method for deep space probes based on inter-satellite time delay measurement. The problem of the need for high-precision real-time navigation in space exploration missions
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[0059] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0060] The present invention aims at the problem that when the existing detectors perform relatively long-distance deep space exploration missions, the operating cost is high, and it is difficult to meet the needs of future deep space exploration missions for high-precision real-time navigation, and provides a method based on inter-satellite time delay Autonomous navigation method for deep space probes.
[0061] Such as Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a method for autonomous navigation of deep space probes based on inter-satellite time delay measurement, including: Step 1, using the positions and velocities of two probes flying in formation as system state quantities , establish a system state model accor...
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The invention provides a deep space probe autonomous navigation method based on inter-satellite time delay measurement, and the method comprises the steps: building a system state model according to orbit dynamics through employing the positions and speeds of two detectors in formation flight as system state variables; obtaining sun direction vector measurement through a sun sensor, and obtainingtime delay measurement and differential Doppler velocity measurement of sunlight reaching the two detectors through an atomic frequency discriminator; respectively establishing a sun direction vectormeasurement model, an inter-satellite time delay measurement model and a differential Doppler velocity measurement model. According to the deep space probe autonomous navigation method based on inter-satellite time delay measurement, the distance information of the detector relative to the sun is provided through inter-satellite time delay measurement, direction information of the detector relative to the sun is provided through sun direction vector measurement, speed information of the detector relative to the sun is provided through inter-satellite differential Doppler speed measurement, andhigh-precision autonomous navigation of the deep space detector is achieved.
Description
technical field [0001] The invention relates to the technical field of autonomous navigation of probes, in particular to an autonomous navigation method for deep space probes based on inter-satellite time delay measurement. Background technique [0002] 2020 will usher in the best time window for launching the Mars probe. Our country plans to launch the "Mars-1" probe to carry out our country's first real planetary exploration. For planetary exploration missions, navigation accuracy has an important impact on the success or failure of the mission. At present, the navigation information is mainly provided for the detector through the ground measurement and control station. This method can meet the requirements of most near-Earth space missions. Interferences such as sun transit and celestial body occlusion lead to navigation interruption and high operating costs, making it difficult to meet the needs of future deep space exploration missions for high-precision real-time navi...
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Login to View More IPC IPC(8): G01C21/24G01C21/02
CPCG01C21/24G01C21/025
Inventor 桂明臻魏才盛陈溅来芦佳振张俊超戴明哲
Owner CENT SOUTH UNIV