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Self-navigation method for planetary power descending branch

A technology of powered descent and autonomous navigation, applied in the field of deep space exploration, can solve problems such as difficult to use planetary landing missions, and achieve the effect of ensuring accuracy and real-time performance

Inactive Publication Date: 2013-10-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, due to the constraints of sensor field of view, power and information processing time, it is difficult to be used in actual planetary landing missions.

Method used

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  • Self-navigation method for planetary power descending branch
  • Self-navigation method for planetary power descending branch
  • Self-navigation method for planetary power descending branch

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Embodiment Construction

[0047] In order to better illustrate the purpose and advantages of the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] This example is aimed at the dynamic descent section of Mars, based on the integrated navigation method of radio measurement, descent sensor and navigation camera, using the radio ranging information between the probe and three radio beacons, the distance measurement information of the descent sensor and the navigation camera The angle measurement information is combined with the extended Kalman filter for filter calculation to achieve high-precision real-time autonomous navigation.

[0049] The specific process is as figure 1 As shown, its implementation method is as follows:

[0050] Step 1: Establish the state model of Mars power descent section

[0051] The state model of the probe is established in the inertial coordinate system of the Mars la...

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Abstract

The invention relates to a self-navigation method for a planetary power descending branch, and belongs to the technical field of deep space exploration. According to the method, a descending sensor, a radio receiver and a navigation camera are combined; before a planetary landing task is started, a planetary orbiter is used for arranging a beacon with radio measurement and communication functions near a landing area; and a position of the beacon is determined by multi-time observation of the orbiter. In a planetary power descending stage, a radio receiving device arranged on a detector is used for measuring a position of the detection relative to the radio beacon; the position, the speed and the attitude of the detector are estimated through the descending sensor and the navigation camera; the navigation data calculation time is short; the demand for the self-navigation instantaneity is met; and the precision and the instantaneity of navigation are guaranteed.

Description

technical field [0001] The invention relates to an autonomous navigation method for a planetary power descent section, and belongs to the technical field of deep space exploration. Background technique [0002] Planetary fixed-point landing is a necessary means to obtain more valuable scientific materials. The autonomous navigation guidance and control technology in the planetary power descent stage can effectively improve the precision of planetary landing and ensure the safety of landing, and the autonomous navigation technology is the premise of realizing the planetary fixed-point landing. However, the target planet is far away from the earth and lacks navigation information sources, so it is urgent to construct an integrated navigation scheme for the planetary dynamic descent stage to ensure the precise landing of the planet. [0003] Exploration missions that have successfully landed on Mars estimate and control the speed, altitude and attitude of the probe relative to...

Claims

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Application Information

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IPC IPC(8): G01C21/24
Inventor 崔平远于正湜朱圣英高艾徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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