Switching method between ground navigation and on-vehicle autonomous navigation in the approaching phase of Mars capture

Abstract

The present invention provides a method for switching between ground navigation and on-device autonomous navigation in the Mars capture approach section, which includes the following steps: Step 1: When the Mars probe is approaching Mars, it is 10 million kilometers to 100,000 kilometers away from Mars in the cruising section , the optical navigation sensor is turned on; Step 2: Analyze the accuracy of radio navigation and optical navigation according to the measurement data of radio navigation and optical navigation; Step 3: Determine the absolute priority strategy of ground radio navigation / absolute priority strategy of on-device optical autonomous navigation / combined navigation information Navigation switching strategies such as fusion strategy; Step 4: When the distance to Mars is less than 100,000 kilometers, the optical navigation sensor is turned off and switched to ground radio navigation. The invention can meet the requirements of future Mars exploration and navigation tasks, and provides a good technical means for high-precision navigation of deep space probes.

Description

technical field [0001] The invention relates to the field of spacecraft, in particular to a method for switching between ground navigation and onboard autonomous navigation in the Mars capture approach segment. Background technique [0002] The Mars exploration mission has a long flight distance and a long duration, and there are a lot of unknowns and uncertainties in the detection object and detection environment. The resulting navigation data discontinuity and other problems cannot fully meet the navigation needs of the special flight phase of Mars exploration (such as the braking capture segment), and the optical navigation method based on Mars images is only applicable to the Mars approach process. Therefore, it is urgent to carry out research on the switching method between ground radio navigation and on-board autonomous navigation. Contents of the invention [0003] Aiming at the limitations of single navigation methods such as ground radio navigation and optical au...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the limitations of single navigation methods such as ground radio navigation and optical autonomous navigation being applied to the Mars exploration flight process, the purpose of this invention is to provide a method for switching between ground navigation and on-board autonomous navigation in the approaching segment of Mars, and solve the problem of single navigation method. Limitation problems can meet the needs of future Mars exploration and navigation missions, and provide a good technical means for high-precision navigation of deep space probes

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