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Spacecraft space autonomous rendezvous and docking relative navigation method

A relative navigation and spacecraft technology, which is applied in the field of spacecraft space autonomous rendezvous and docking relative navigation, can solve the problems of high-order truncation error, low approximation accuracy, easy filtering and divergence, etc., and achieves small calculation amount, high filtering accuracy and numerical stability. performance, improved robustness

Pending Publication Date: 2021-11-02
INNOVATION ACAD FOR MICROSATELLITES OF CAS +1
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Problems solved by technology

However, this method has high-order truncation errors, and requires the calculation of the Jacobian matrix of the system during the linearization process. For nonlinear systems, there are problems of large amount of calculation and low approximation accuracy.
In addition, when faced with strong nonlinearity and state uncertainty of the system, the robustness of this method is poor, and it is easy to filter divergence

Method used

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  • Spacecraft space autonomous rendezvous and docking relative navigation method
  • Spacecraft space autonomous rendezvous and docking relative navigation method
  • Spacecraft space autonomous rendezvous and docking relative navigation method

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Embodiment Construction

[0138] It should be noted that components in the various figures may be shown exaggerated for the purpose of illustration and are not necessarily true to scale. In the various figures, identical or functionally identical components are assigned the same reference symbols.

[0139] In the present invention, unless otherwise specified, "arranged on", "arranged on" and "arranged on" do not exclude the presence of intermediates between the two. In addition, "arranged on or above" only means the relative positional relationship between two parts, and under certain circumstances, such as after the product direction is reversed, it can also be converted to "arranged under or below", and vice versa Of course.

[0140] In the present invention, each embodiment is only intended to illustrate the solutions of the present invention, and should not be construed as limiting.

[0141] In the present invention, unless otherwise specified, the quantifiers "a" and "an" do not exclude the scene ...

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Abstract

The invention relates to the technical field of spacecraft space rendezvous, and provides a spacecraft space autonomous rendezvous docking relative navigation method which comprises the following steps: constructing a spacecraft space autonomous rendezvous model; measuring relative position information; constructing a combined navigation system; and performing state estimation on the integrated navigation system through a simplified strong tracking volume Kalman filtering algorithm. According to the method, the integrated navigation system can be constructed through the measurement information autonomously acquired by the spacecraft, and the state estimation is carried out, so that the method has the advantages of small calculation amount, high filtering precision and good numerical stability, and has relatively good robustness. In addition, a simplified strong tracking cubature Kalman filtering algorithm is improved based on the statistical characteristics of a filtering residual sequence, so that the method disclosed by the invention has better adaptivity.

Description

technical field [0001] The present invention generally relates to the technical field of spacecraft space rendezvous. Specifically, the invention relates to a space autonomous rendezvous and docking relative navigation method for a spacecraft. Background technique [0002] The autonomous navigation system for spacecraft rendezvous and docking usually includes navigation sensors and navigation computers. During the space rendezvous of the spacecraft, the navigation computer establishes the state equation according to the orbital dynamics model of the spacecraft, and processes the measurement information of the navigation sensor through an appropriate navigation filtering algorithm to locate the position and velocity of the spacecraft in real time information. [0003] Close-range space rendezvous and docking requires high-precision relative navigation, and the combined navigation method of laser rangefinder and camera is usually used, which has the advantages of simple stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16G01C21/02G01S17/08
CPCG01C21/1652G01C21/025G01S17/08
Inventor 范一迪张永合蒋峻夏喜旺支帅曹焱许诺
Owner INNOVATION ACAD FOR MICROSATELLITES OF CAS
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