Multi-satellite coordinated real-time tracking method for spatial dynamic target

Abstract

The invention discloses a multi-satellite coordinated real-time tracking method for a spatial dynamic target. The method comprises the steps of firstly establishing a low earth orbit satellite and staring detector model, a tracking task model and a visible time window model; then introducing a rolling time domain concept when real-time tracking is performed on the spatial dynamic target, taking the forward-looking fixed time length T as the rolling time domain to obtain a tracking task of a ballistic missile in the rolling time domain, and establishing a single-layer to-be-tracked task set with the single rolling time domain as a reference, and splitting each to-be-tracked task into a plurality of atomic tasks in the rolling time domain by use of a reverse tree structure to obtain a set ofdetector resources corresponding to each atomic task; and finally, constructing a fitness function based on constraints and objective functions of resource scheduling, and then solving the optimal particle individual based on the fitness value of the particle individual through an evolutionary particle swarm optimization algorithm with crossover and mutation operations, and performing resource scheduling of the detector resources on the single-layer atomic task set according to the optimal particle individual.

Description

technical field [0001] The invention relates to the technical field of satellite scheduling, in particular to a multi-satellite coordinated space dynamic target real-time tracking method. Background technique [0002] The real-time tracking task for ballistic missiles is an important means to discover, monitor and track enemy strategic missiles and issue alarms. It can obtain the infrared radiation of enemy strategic missiles, determine the coordinates of the missile's location, and judge the launch point and landing point of the missile , and can send target images to ground stations or ground command centers, providing important intelligence information for military anti-missile and military confrontation. [0003] Space reconnaissance and surveillance systems usually include high-orbit satellites and low-orbit satellites. After the high-orbit satellite confirms the suspicious missile target, the ground command center dispatches the spaceborne staring detector on the low-...

AI Technical Summary

Problems solved by technology

However, for the real-time tracking task of ballistic missiles, the existing research still has the following deficiencies: the existing technology only discusses the problem of ballistic missile-oriented reconnaissance task scheduling on the surface, and believes that the system can predict the complete trajectory of the target after it finds the target. A simple task decomposition algorithm is used to decompose the task and based on this to construct the visible relationship between the satellite and the target task, ignoring the characteristics of tracking tasks such as high real-time performance, difficult identification, and fine time constraints, as well as the rules for using continuous resources on the satellite. High algorithm complexity; most of the scheduling models use the maximization of task revenue as the global objective function, and the research on resource utilization in the scheduling process is insufficient; most of the existing research inventions stay in the introduction of scheduling models that include task constraints and visible time constraints The scheduling algorithm realizes the adaptation relationship between the target task and satellite resources, ignoring the constraints of on-board resources, the dynamic changes of on-board resource status with task execution, and the synergy between tasks in the scheduling process

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