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Phased array radar target rapid navigation method based on multi-model membership control

A phased array radar and multi-model technology, applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems of initial accuracy and radar resource load contradiction

Active Publication Date: 2020-05-19
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, phased arrays can flexibly control the time and direction of radar beams, and can use short-term scheduling of radar resources to quickly establish navigation for moving targets. Reason, fast start faces the contradiction between initial accuracy and radar resource load

Method used

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  • Phased array radar target rapid navigation method based on multi-model membership control
  • Phased array radar target rapid navigation method based on multi-model membership control
  • Phased array radar target rapid navigation method based on multi-model membership control

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Experimental program
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Embodiment Construction

[0010] (1) Multi-model parameter estimation

[0011] The initial motion model of the target is established. Since the target is built in a short period of time, the uniform linear motion model is adopted, and the random noise with a mean value of 0 and a variance of Q is superimposed at the same time:

[0012] x(k+1)=x(k)+v(k)T+w(k)

[0013] E(w(k))=0

[0014] E(w(k)w T (k)) = Q

[0015] Among them, x represents the target motion state, w is Gaussian noise with zero mean, and v represents the velocity. Establish multiple models corresponding to different speed targets, and the target state equation of each speed model is:

[0016] x(k+1)=x(k)+v i (k)T+w(k),i=1,2,...,N

[0017] For the Kalman filter estimation of N models, the optimal estimate for calculating the current target state is

[0018]

[0019] where p(v(k)=v j |Y k ) is the posterior model probability, which represents the probability of each model. The posterior model probability also represents the pos...

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Abstract

The invention relates to a phased array radar target rapid navigation method based on multi-model membership control, and the method comprises the steps: constructing a speed multi-model algorithm based on a fuzzy logic frame, enabling each model to employ a uniform linear motion model, and employing a standard Kalman filter for filtering; and determining the effectiveness of each Kalman filter byusing a fuzzy set and an estimated value of the target constant-speed linear motion model. When a proper fuzzy set is selected to be overlapped, only the position of a target at the next moment needsto be predicted for an approximate speed estimation model subset, a target navigation beam establishment request is put forward for a resource scheduling module, and the navigation estimation accuracy and the scheduling resource consumption are balanced by utilizing an optimization mode of fuzzy logic.

Description

technical field [0001] The invention relates to radar data processing technology in the field of radar technology. Background technique [0002] Due to its high antenna gain and flexible antenna beam control, the multi-functionality of the radar can be realized by adaptively allocating time slices. It can simultaneously track multiple targets and scan in multiple airspaces. Phased array radar target tracking technology has been used in military , industry and civil use have been widely used. At the same time, in the target tracking technology, the beam pointing is flexible and controllable, and the distribution of radar energy on multiple target tracking can be determined adaptively through certain criteria, and the energy can be concentrated at the position where the target is more likely to appear to improve target discovery. speed, increasing target tracking accuracy while maintaining stable tracking of other targets. [0003] The process of phased array radar from targ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72G01S13/58
CPCG01S13/726G01S13/58G01S2013/0245
Inventor 耿利祥侯娇李纪三
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND