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A Multi-Shard Active Cleanup Online Replanning Method

A re-planning and fragmentation technology, applied in the aerospace field, can solve problems such as difficulty in achieving balance and low efficiency of multi-fragmentation tasks

Inactive Publication Date: 2019-12-20
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0014] The purpose of the present invention is to provide a multi-fragment active clearing online re-planning algorithm to solve the problems of low execution efficiency and difficulty in achieving balance of multi-fragment tasks in the prior art

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  • A Multi-Shard Active Cleanup Online Replanning Method
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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The invention discloses an online replanning algorithm for actively clearing multiple fragments, which includes the following steps:

[0037] Step 1. Establish the multi-fragment directed connected path expression, formulate the set of on-orbit emergencies;

[0038] A change in any factor in the debris set and clearing task indicators may become an inducement for online replanning, which again reveals the necessity of online replanning. Each factor will be analyzed separately below. The set of on-orbit emergencies includes: change set of fragments, change set of energy consumption, change set of fragment priority, change set of fragment consumption load.

[0039] Fragment collection D analysis:

[0040] The change of fragment set D mainly refers to the increase or decrease of the number of cleared fragment sets, which is usually cau...

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Abstract

The invention discloses a multi-fragment active clearing online re-planning algorithm which comprises the following steps of (1) building a multi-fragment directed connected path expression and formulating a set of on-orbit emergencies; (2) combining the set of the on-orbit emergencies and formulating an online re-planning model; and (3) solving a simulation model in the step (2) by adopting a very fast simulated annealing algorithm to obtain an optimal route. The online re-planning algorithm can be suitable for task optimization under various on-orbit emergencies based on multi-fragment active clearing of subsatellite and parent satellite; benefit maximization under the rated condition of on-orbit resources is achieved by adopting the maximum priority as a re-planning target; a simulated annealing algorithm is improved, the fast online re-planning method is designed, and the on-orbit corresponding requirements are achieved; basic re-planning is provided for the condition of not changing the task time, and an optimal solution for coping with the emergencies is searched; and supplementary re-planning is provided for the condition of capable of prolonging the task time, and a maximal benefit solution after the emergencies is searched.

Description

【Technical field】 [0001] The invention belongs to the field of aerospace technology, and in particular relates to an online replanning algorithm for actively clearing multiple fragments. 【Background technique】 [0002] In a broad sense, space debris can be divided into two types: Micrometeoroid and Space / Orbital Debris, and the operating area of ​​artificial space debris coincides with the operating area of ​​the orbiting service spacecraft, causing huge damage to human space exploration. Obstacles have attracted widespread attention. Because low-Earth orbit is the easiest to develop and has a wide range of uses, the number of available orbits continues to decrease, the satellite space density has reached a warning value, and unpredictable space collisions have begun to occur, so it is imperative to protect low-Earth orbit resources from space debris. [0003] According to the use of low-Earth orbit by humans in recent decades, from the first artificial earth satellite to t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20G01C21/24
CPCG01C21/20G01C21/24
Inventor 刘勇杨家男王易周冯乾李毅兰刘昆鹏解佳豪袁建平潘泉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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