Large-volume chaff cloud electromagnetic scattering measurement method based on partition vector transportation

Abstract

The invention belongs to the technical field of electronic and scientific application, and discloses a large-volume chaff cloud electromagnetic scattering measurement method based on a partition vector transport theory. The large-volume chaff cloud electromagnetic scattering measurement method includes the steps: calculating the distribution of chaff clouds in wake flow in combination with an aerodynamic theory; based on the chaff cloud space distribution model, using a K-means algorithm to carry out rapid partitioning processing on the chaff cloud space distribution model, and using a linearmoment method to calculate an electromagnetic propagation attenuation coefficient in each subarea; based on the partition data and the obtained intra-area propagation attenuation coefficient, establishing a vector transport equation in the whole space area occupied by the chaff cloud, solving the vector transport equation by using a Monte Carlo method, and solving a statistical solution of the vector transport equation by using the emitting, transporting, colliding, tracking and receiving processes of the virtual photons; and based on a solving result of the vector transport equation, obtaining scattering HH, HV, VV and VH polarization modes through Stokes vector transformation processing. According to the large-volume chaff cloud electromagnetic scattering measurement method the problem of low calculation efficiency of the scattering cross section of the large-volume chaff cloud radar in the prior art is solved, and meanwhile, the problem of calculation of the scattering cross sectionof the chaff cloud radar in the aircraft wake flow is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of electronics and science applications, and in particular relates to an electromagnetic scattering measurement method for large-volume chaff clouds based on partitioned vector transport. Background technique [0002] At present, the closest existing technology: in electromagnetic warfare, the use of chaff cloud has a long history, simple production, obvious effect, and low cost, and has been widely used in the battlefield. As the electronic confrontation between the enemy and the enemy, the radar as the main reconnaissance equipment plays a vital role in the defense of countries all over the world. Therefore, in modern warfare, especially in future warfare, chaff jamming technology releases a large amount of chaff in space, resulting in a large difference between the echo obtained by the enemy radar and the real echo of the target, so that the enemy radar The target cannot be identified accurately and quic...

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Problems solved by technology

[0004] To sum up, there are several significant deficiencies in chaff cloud radar scattering calculation (prediction) technology: First, although the calculation of chaff cloud radar scattering cross-section based on numerical algorithms is accurate, it needs to solve large-scale matrix equations. The number of unknowns reaches 10 14 In the order of magnitude, even supercomputing requires considerable time to solve this equation. If the computing resources (such as memory, computing time) are limited, it will not be possible to calculate the electromagnetic scattering of large-volume chaff clouds. At the same time, using numerical methods Computing chaff clouds can only calculate a set of possible results under statistical significance. To obtain a statistical solution, repeated multi-sample calculations are required, which will consume a lot of manpower and material resources

[0006] (1) Calculation of chaff cloud radar cross section based on numerical algorithm Due to the limitation of computing resources and the huge number of unknowns to be solved, it is impossible to calculate the radar cross section of large-scale chaff cloud

[0007] (2) The calculation of chaff cloud radar scattering cross-section based on the actual measurement results is difficult to promote; due to the electromagnetic coupling between the chaff, the independent scattering method ignores the multiple coupling between the chaff, which reduces the credibility of the calculation results. lower

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