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Agile satellite scheduling method considering time-dependent conversion time

A time-conversion and time-dependent technology, applied in the field of satellite scheduling, can solve the problems of low scheduling efficiency, lack of time-dependent characteristics, and neglect of time-dependent characteristics of conversion time.

Pending Publication Date: 2020-09-11
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] Most of the existing mission planning algorithms for agile satellites ignore the time-dependent characteristics of the transition time, or lack clear modeling and analysis of the time-dependent characteristics, which leads to the problem of low scheduling efficiency

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  • Agile satellite scheduling method considering time-dependent conversion time
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  • Agile satellite scheduling method considering time-dependent conversion time

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Embodiment Construction

[0075] Figure 1 to Figure 7 It shows a specific embodiment of the agile satellite scheduling method of the present invention considering time-dependent conversion time, including the following steps, such as figure 2 Shown:

[0076] Step 1: Obtain the target sequence to be observed and preprocess it;

[0077] Step 2: Build an agile satellite scheduling model whose time depends on the transition time;

[0078] The time-dependent switching time agile satellite scheduling model constructed in this embodiment is firstly based on the fact that the switching time satisfies the first-in-first-out rule and the triangle inequality rule.

[0079] (1) First in first out rule (FIFO rule)

[0080] The first-in-first-out rule means that assuming that the satellite has two different observation start times t for the previous observation task i and t j (t i j ), after the attitude conversion, t j The arrival time of the corresponding next task is no earlier than t i corresponding ar...

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Abstract

The invention discloses an agile satellite scheduling method considering time-dependent conversion time. The agile satellite scheduling method comprises the steps of obtaining a to-be-observed targetsequence and preprocessing the to-be-observed target sequence; constructing an agile satellite scheduling model of time-dependent conversion time; inputting the preprocessed to-be-observed target sequence into an agile satellite scheduling model, and solving the agile satellite scheduling model; and outputting a solving result in the step 3 to obtain a scheduling scheme of the agile satellite. Dueto the fact that the time dependence of the attitude conversion time between the continuous observation tasks is considered, the constructed agile satellite scheduling model can better meet the scheduling requirement, and the scheduling efficiency of the solved scheduling scheme is higher. In the solving process, the earliest and latest unreachable time of each time window and the earliest starting time and latest starting time between any pair of observation windows in the same circle are pre-calculated, so that repeated calculation is reduced when insertion operation is tried, the calculation time is shortened, and the scheduling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of satellite scheduling, in particular to an agile satellite scheduling method considering time-dependent conversion time. Background technique [0002] Earth observation satellites (EOSs) are space platform systems that can obtain images of specific regions of the Earth's surface according to various observation needs. With the development of science and technology and economy, EOSs have been applied in many aspects of economy and society, such as natural resource exploration, disaster warning, climate change analysis and so on. Considering the high cost of launching satellites, an efficient and reliable EOSs scheduling method plays a key role in improving the performance of satellite observation systems. The scheduling of earth observation satellites refers to given a set of targets to be observed with different revenue values, selecting some of them for scheduling, and generating an imaging scheduling pl...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/04G06F119/12
CPCG06F30/20G06F2111/04G06F2119/12
Inventor 刘晓路彭观胜何磊沈大勇吕济民王术王涛张忠山陈盈果陈宇宁
Owner NAT UNIV OF DEFENSE TECH
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