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Space high-maneuverability target tracking method based on depth correlation

A high maneuvering target and depth technology, applied in the field of space target tracking and detection, can solve the problems of low signal-to-noise ratio, submerged target background clutter, difficult to achieve high maneuvering target detection and tracking, etc., to achieve continuous tracking and solve track correlation. effect of the problem

Pending Publication Date: 2022-02-18
NO 63921 UNIT OF PLA +1
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  • Application Information

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Problems solved by technology

This type of target has a complex motion pattern and strong high-speed maneuverability, which poses a huge challenge to aerospace measurement and control and target perception: on the one hand, it is difficult for the existing technical system to include the detection and stable tracking of high-speed maneuvering targets, and the spatial position and attitude of the target cannot be realized. measurement, on the other hand, the existing equipment does not have fast imaging capability, and cannot realize the measurement of the characteristics of highly maneuverable targets
The working mode of traditional radar equipment is mostly based on time sampling based on continuous pulse accumulation, while high-speed maneuvering targets are sensitive to time and have the characteristics of large dynamics and fast fluctuations, making it difficult for the existing system to quickly obtain target measurement information
In addition, the signal-to-noise ratio of high-speed maneuvering target detection signals in space is generally low, and the target is easily overwhelmed by background clutter. Even after noise suppression, it is difficult to detect and track high-speed maneuvering targets.

Method used

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  • Space high-maneuverability target tracking method based on depth correlation
  • Space high-maneuverability target tracking method based on depth correlation
  • Space high-maneuverability target tracking method based on depth correlation

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Embodiment 1

[0071] Such as figure 1 As shown, an embodiment of the present invention provides a method for tracking a high-mobility target in space based on depth correlation, including the following steps:

[0072] S1. Obtain 100 low-resolution sequence images of the detection area along the time dimension;

[0073] Preliminary verification was carried out using the inverse SAR measured data of a certain radar equipment, and 100 inverse SAR images with a resolution of 100m were obtained in the detection area. / s;

[0074] S2. Perform normalized preprocessing on the time series images;

[0075] Preferably, performing normalized preprocessing on the acquired inverse SAR image sequence includes:

[0076] S2-1. Count the mean δ and variance σ of each image sequence;

[0077] S2-2, carry out normalization processing to N images respectively, before the normalization processing, the pixel value of the i and j points of the n image is X n (i, j), the normalized result becomes

[0078] S...

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Abstract

The invention relates to a space high-maneuverability target tracking method based on depth correlation, and the method comprises the steps: designing a target detector based on a kernel function according to a two-dimensional high-resolution image sequence obtained through the shooting of a detection region; with utilization of similarity characteristic that a kernel function can reflect data in a high-dimensional space, enabling a time domain data depth correlation algorithm to distinguish signals of a moving target in a time domain from background clutters and noise signals, mapping a time sequence corresponding to a certain pixel to the high-dimensional space, and realizing continuous tracking of the space high-maneuverability target. According to the target tracking method based on the image sequence, a depth correlation method is used to mine the difference of the target, background clutter and noise in time sequence characteristics, detection tracking of the target under the condition of a low signal-clutter-noise ratio is achieved, and the problem of track correlation of the high-maneuvering target is solved.

Description

technical field [0001] The invention relates to the technical field of space target tracking and detection, in particular to a depth correlation-based space high-mobility target tracking method. Background technique [0002] With the increasing level of modern space science and technology, new high-mobility space vehicles have become a new direction for the development of the space power of space powers. This type of target has a complex motion pattern and strong high-speed maneuverability, which poses a huge challenge to aerospace measurement and control and target perception: on the one hand, it is difficult for the existing technical system to include the detection and stable tracking of high-speed maneuvering targets, and the spatial position and attitude of the target cannot be realized. For measurement, on the other hand, the existing equipment does not have the capability of fast imaging, and cannot realize the measurement of the characteristics of highly maneuverable...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S13/72
CPCG01S13/9021G01S13/9064G01S13/72
Inventor 齐巍杨威张帆冯飞王亚敏赵迪
Owner NO 63921 UNIT OF PLA
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