Expectation-maximization-based aerial maneuvering target track segment association method

A technology for maximizing expectations and maneuvering targets, applied in navigation calculation tools, etc., to achieve the effects of improving track continuity, high-precision track adhesion, and realizing track adhesion

Inactive Publication Date: 2015-10-07
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

[0004] However, existing results are mainly for ground maneuvering road targets

Method used

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  • Expectation-maximization-based aerial maneuvering target track segment association method
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  • Expectation-maximization-based aerial maneuvering target track segment association method

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Embodiment

[0081] 1) Simulation scene: consider a single target scene, the movement mode is uniform speed-turning-uniform speed movement, and the movement time is 10 beats-20 beats-30 beats respectively. The sampling period T=1, the initial state is [1011m 200m / s 2039m200m / s], and the measurement noise covariance matrix is The radial distance deviation is σ ρ =50m, the standard deviation of the azimuth angle is σ θ =10 -3 rad, the turning angular velocity is 0.03rad / s, the tracking is modeled as a uniform linear motion, and the filtering algorithm uses extended Kalman filtering.

[0082] Tracking result reference figure 2 , it can be seen that due to the maneuvering of the target, the track has deviated from the real track before breaking, and there is a deviation between the end of the track segment and the starting point of the new track, image 3 As a result of the adhesion, this method can achieve track adhesion very well. Figure 4 It is the X-direction state measurement, tra...

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Abstract

The invention relates to an expectation-maximization-based aerial maneuvering target track segment association method. According to the expectation-maximization-based aerial maneuvering target track segment association method, in a multi-clutter multi-target environment, maneuvering starting time and finishing time (i.e. a track segment association extrapolated starting point and an extrapolated terminal point) are taken as a missing variable and a turning maneuver variable for estimating; under an EM frame, combined optimization of maneuvering time and turning angular speed is carried out; measuring is updated continuously in iterative processes; at the same time, accurate state estimation is carried out; and finally accurate track segment association is realized. The expectation-maximization-based aerial maneuvering target track segment association method possesses high application value in aerial maneuvering target stabilization tracking using typical detection equipment such as radar and infrared equipment. Beneficial effects are that: optimal identification of maneuvering parameters and maneuvering time is realized, optimal estimation of target states is realized, and further multi-target track segment association can be realized via two-dimensional assignment. The expectation-maximization-based aerial maneuvering target track segment association method is capable of realizing high accuracy track segment association, and increasing track continuity; and obtained results are verified in simulation experiments and air traffic control real-equipment data.

Description

technical field [0001] The invention belongs to the technical field of track correlation and fusion of multi-source information fusion, and specifically relates to a method for sticking tracks of air maneuvering targets based on expectation maximization, which is expected to significantly improve the stability of radar, infrared and other detection systems for high-speed and high-moving air targets Tracking and air situation generation capabilities. Background technique [0002] With the continuous enhancement of high-speed and high-maneuverability of air targets, the tracking system based on prior motion models is facing increasingly severe challenges, especially the resulting track breaks not only destroy the accuracy and continuity of target track tracking , And it restricts the correct judgment and treatment of empty conditions. Track fragment bonding (referred to as track bonding) is a special track association and fusion technology, which uses end track extrapolation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/20
Inventor 张金凤梁彦何重阳张伟芳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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