A Spacecraft Robust Rendezvous Trajectory Design Method Considering Uncertainty Factors

A trajectory design and spacecraft technology, applied in the direction of instruments, adaptive control, control/regulation systems, etc., can solve problems such as slow calculation speed, and achieve the effect of suppressing influence

Active Publication Date: 2021-04-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods generally have a slow calculation speed and introduce uncertain factors in an open-loop manner, which is inconsistent with the actual situation

Method used

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  • A Spacecraft Robust Rendezvous Trajectory Design Method Considering Uncertainty Factors
  • A Spacecraft Robust Rendezvous Trajectory Design Method Considering Uncertainty Factors
  • A Spacecraft Robust Rendezvous Trajectory Design Method Considering Uncertainty Factors

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Embodiment Construction

[0052] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0053] In order to verify the effectiveness of the proposed robust trajectory design method, it is applied to the rendezvous task containing uncertain factors, and the following simulation is carried out. The uncertain factors of the task are shown in Table 1, and the task objectives are shown in Table 2.

[0054] Table 1 Uncertain factors / disturbance parameters

[0055]

[0056] Table 2 Mission objectives

[0057]

[0058] The steps in problem solving include the following three:

[0059] Step 1. Establish the uncertainty factor propagation equation in the spacecraft rendezvous mission

[0060] First, the relative motion dynamics equation considering uncertain factors can be expressed as

[0061]

[0062]

[0063] Where r is the relative position of the spacecraft, v is the relative velocity, and v c , v t with r c , r t represent the velocit...

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Abstract

The invention relates to a spacecraft robust rendezvous trajectory design method considering uncertain factors. With utilization of the characteristic of constructing an uncertain factor propagation equation rapidly and precisely according to a covariance analysis method, influences on a nominal track by uncertain factors are analyzed. A robust optimization problem is constructed by using the analysis results as the constraints of the optimization problem. Calculation is carried out based on a genetic algorithm to realize the robust rendezvous trajectory design. Therefore, the traditional optimal system rendezvous determination problem is transformed into a robust rendezvous problem considering uncertain factors; and calculation is carried out based on the genetic algorithm, so that an objective of the robust rendezvous trajectory design is achieved.

Description

technical field [0001] The invention belongs to the field of aerospace flight dynamics and control, and relates to a robust rendezvous trajectory design method for spacecraft considering uncertain factors. Background technique [0002] Since the 21st century, with the development of aerospace technology, space technology has gradually shifted from entering space and exploring space to using space and space operation. Space rendezvous, as the basis for spacecraft to perform space operations, refers to the technology in which two or more spacecraft meet at a predetermined position and time on a space orbit. For half a century, human beings have completed complex space activities such as space station construction, manned moon landing and deep space exploration based on rendezvous technology. [0003] In terms of rendezvous trajectory design, scholars have carried out extensive research. In the literature Clohessy W.H.Terminal Guidance System for Satellite Rendezvous[J].Aeros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 罗建军靳锴马卫华王明明党朝辉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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