Autonomous navigation method for planet in final approaching section

A technology of autonomous navigation and approach segment, applied in the field of deep space exploration, which can solve the problems of limited number of planetary orbiters and difficulty in ensuring real-time autonomous navigation

Inactive Publication Date: 2013-08-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

However, the number of planetary orbiters is currently limited, and it is still difficult to guarantee the real-time autonomous navigation of the entire process of the probe's final approach.

Method used

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  • Autonomous navigation method for planet in final approaching section
  • Autonomous navigation method for planet in final approaching section
  • Autonomous navigation method for planet in final approaching section

Examples

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Embodiment Construction

[0039] This example is aimed at the autonomous navigation scheme based on radio measurement and pulsar measurement in the final approach to Mars, using the radio ranging information between the probe and three Mars orbiters, and the measurement information of the three pulsars, combined with the ensemble Kalman filter Perform filter calculation to realize high-precision real-time autonomous navigation. The specific implementation method of this example is as follows:

[0040] Step 1: Establishment of the state model of the Mars final approach segment

[0041] The state model of the detector is established in the heliocentric inertial coordinate system. The state vector of the detector is the position vector r s =[r x ,r y ,r z ] T and velocity vector v s =[v x ,v y ,v z ] T . Considering the gravitational force of the sun, Mars and other perturbing forces, the state model of the probe in the Mars entry stage is established as:

[0042] X ...

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Abstract

The invention relates to an autonomous navigation method for a planet in a final approaching section, which belongs to the field of deep space exploration. The method comprises the following steps: establishing a state model of the planet in the final approaching section; carrying out radio measurement and communication through a detector and planetary orbiters determined by n positions, observing m pulsars and establishing an autonomous navigation measurement model of the planet in the final approaching section; and calculating the state of the detector through navigation filtering based on the two models. According to the invention, measurement characteristics of pulsar navigation and radio navigation are combined in the autonomous navigation method, a non-linear filtering method is employed, so autonomous navigation of the planet in the final approaching section is realized, precision and instantaneity of autonomous navigation of the planet in the final approaching section are improved, and the autonomous navigation method has good exploitativeness and high measurement precision and can satisfy the requirement for instantaneity of autonomous navigation.

Description

technical field [0001] The invention relates to an autonomous navigation method for the final approach stage of a planet, belonging to the technical field of deep space exploration. Background technique [0002] In order to obtain more valuable scientific materials, it is necessary for the planetary probe to land in a specific area with high scientific value. Advanced autonomous navigation guidance and control technology through planetary entry, descent, and landing process can effectively improve planetary landing accuracy, but for planets with atmospheres, the planetary entry state, especially the determination accuracy of the track angle still affects the atmospheric capture and landing accuracy major factor. Therefore, it is urgent to construct an autonomous navigation scheme for the final approach stage of the planet to ensure the accuracy of planet landing. [0003] Most of the exploration missions that have successfully landed on Mars rely on the radial distance and...

Claims

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Application Information

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IPC IPC(8): G01C21/00
Inventor 崔平远于正湜徐瑞高艾朱圣英
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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