Swing-by probe autonomous celestial navigation method based on adaptive scale change

A technology of celestial navigation and scale change, which can be applied to combined navigators and other directions, and can solve problems such as large amount of calculation and low navigation accuracy

Active Publication Date: 2013-06-12
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the problems of large amount of calculation in the early stage of leveraged flight and low navigation accuracy in the leveraged flight stage of the existing fixed-step integration method, and to provide an efficient and high-efficiency method for the leveraged flight deep space probe. autonomous navigation method

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  • Swing-by probe autonomous celestial navigation method based on adaptive scale change
  • Swing-by probe autonomous celestial navigation method based on adaptive scale change
  • Swing-by probe autonomous celestial navigation method based on adaptive scale change

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Embodiment Construction

[0088] Such as figure 1 As shown, the leveraged celestial bodies involved in the aforementioned technical solutions can be planets in the solar system such as Mars, Venus, Jupiter, Saturn, etc., and Mars is used as an example below to illustrate the specific implementation process of the present invention:

[0089] 1. Establish a state model of deep space probes based on the gravitational orbital dynamics of the sun and eight planets

[0090] First initialize the position and velocity, set X'=[x' y' z' v x ' v y ' v z '] T is the state vector in the center of fire inertial coordinate system, x′,y′,z′,v′ x ,v' y ,v′ z are the three-axis position and velocity of the detector in the inertial coordinate system of the center of fire, respectively. The above variables are functions related to t. According to the orbit design of the detector, the initial value of the position and velocity of the detector is X′(0) .

[0091] In the inertial coordinate system of the center of f...

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Abstract

The invention relates to a swing-by probe autonomous celestial navigation method based on adaptive scale change. The method comprises the following steps: establishing a deep space probe state model and an autonomous celestial navigation system measurement model; acquiring measurement quantity of the autonomous celestial navigation system, and employing an adaptive scale change Unscented Kalman filtering method, so that the time scale suitable for the current model is obtained, and the position and speed of the detector in an inertial coordinate system which takes a target object as the center are obtained; applying the obtained time scale, position and speed to navigation at the next moment. The method belongs to the technical field of aerospace navigation, the time scale can be adaptively changed along with the time change according to the gravity acceleration stressed by the probe, the navigation system model error caused by the fixed time scale time update is reduced, and the method is suitable for a swing-by deep space probe.

Description

technical field [0001] The invention relates to an autonomous navigation method based on the adaptive scale change of an orbital model when a deep-space probe flies by force, and is an autonomous navigation method very suitable for the deep-space probe to fly by force. Background technique [0002] As an important feature and symbol of a country's comprehensive national strength and scientific and technological development level, deep space exploration technology has attracted great attention from all countries in the world. A new round of competition for deep space exploration has kicked off. At the beginning of the 21st century, all major aerospace powers focused their attention on the deep space universe 380,000 kilometers away from the earth. The world's major aerospace groups, including the United States, European Space Agency, Russia, Japan, and India, have all proposed future deep space exploration plans to conduct manned or robot-based unmanned exploration of major ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/24
Inventor 房建成马辛宁晓琳
Owner BEIHANG UNIV
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