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Route sign planning method of deep space detection autonomous navigation

A technology of autonomous navigation and deep space exploration, applied in the field of satellite navigation, can solve the problems of real-time, cost and resource constraints, and achieve the effect of simple implementation and small amount of calculation

Active Publication Date: 2014-07-30
BEIJING INST OF CONTROL ENG
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Problems solved by technology

But this requires a lot of ground operations and is limited in real-time, cost and resources

Method used

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  • Route sign planning method of deep space detection autonomous navigation
  • Route sign planning method of deep space detection autonomous navigation
  • Route sign planning method of deep space detection autonomous navigation

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Embodiment

[0068] The target celestial body is asteroid 25413, and the six elements of the detector orbit are selected as a=0.75km, e=1 / 3, i=π / 2, ω=π, RAAN=0, f=π, and the detector distance is small at the beginning The distance from the center of the planet is 1km, and after flying half a circle, the distance is reduced to around 500m, and then active control is carried out there, so that it descends to the surface of the asteroid at a constant speed.

[0069] During navigation, landmark observation is performed every 30s. The position error 1σ of the landmark point is set to 15m, the Euler angle noise 1σ is 1e-5rad, the pixel noise 1σ is 8.801e-5, the initial position error of navigation is 300m in each direction, and the speed error is 0.02m / s.

[0070] Simulation results (such as figure 2 (shown) shows that when the filtering is converging, the navigation accuracy can reach the meter level.

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Abstract

A route sign planning method of deep space detection autonomous navigation comprises the following steps: giving a navigation system information matrix expression based on visual line information according to the definition of a Fisher information matrix; establishing a relationship expression between an error variance matrix and the information matrix by utilizing a Cramer-Rao inequation, carrying out observability analysis based on the characteristic value information of the error variance matrix, and quantitatively assessing the influence of a route sign on the navigation system observability; and finally selecting an appropriate route sign to realize the largest autonomous navigation observability.

Description

technical field [0001] The invention belongs to the field of satellite navigation, and relates to a road sign planning method in a navigation method based on road sign sight information. Background technique [0002] The spacecraft navigation system is used to determine the position and attitude of the probe, which is the basic system to ensure that the probe can successfully carry out a series of scientific tasks. For deep space exploration missions, many current detectors rely on the Deep Space Network. But this requires a lot of ground operations, and is subject to various constraints in real-time, cost and resources. Therefore, whether it is from the perspective of reducing operating costs or improving performance, detectors are required to have a certain ability to operate autonomously. [0003] At present, the mainstream autonomous navigation method of deep space probes is the navigation method based on optical imaging measurement. For the target celestial body orbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 王大轶李茂登黄翔宇李骥郭敏文
Owner BEIJING INST OF CONTROL ENG
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