Method for tracking direction sudden-changing maneuvering target
A technology of maneuvering target and target speed, which is applied to the tracking field of maneuvering targets with sudden changes in direction, can solve the problem of not being able to achieve good tracking of such movements, and achieve the effect of good tracking performance.
Active Publication Date: 2016-02-03
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
For example, tactical zigzag running in special forces operations, this situation often occurs in battlefield reconnaissance and special operations, and previous tracking methods cannot achieve better tracking of this type of movement
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[0018] figure 1 It is the realization flowchart of the present invention. When the target does not maneuver with a sudden change in direction, the target velocity vector estimated by the maximum likelihood estimation method is used to track, and this process will not be repeated in the flow chart; when the target has a sudden change in direction maneuver, the specific implementation method includes the following steps:
[0019] In the first step, set N motion vectors with different vector angles and set their initial probabilities.
[0020] Set N motion vectors with different vector angles, N is an odd number greater than 1, and the value is determined according to the actual situation (in order to ensure tracking accuracy, usually N≥5, and the case of N=5 will be explained later). The magnitude of the modulus of each motion vector is the same as the target velocity vector at time k, and differs from the target speed vector at time k by a certain angle. Because the initial v...
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The invention provides a method for tracking a direction sudden-changing maneuvering target. The technical scheme comprises the steps of S1, setting N motion vectors with different vector angles, and setting the initial probability of each motion vector, wherein the size of a model of each motion vector is identical to a target velocity vector at the current moment, a difference is reserved between the vector angle of each motion vector and the vector angle of the target velocity vector at the current moment, and the initial probabilities of the N motion vectors are set simultaneously; and S2, estimating the current probability of each motion vector, and outputting a target velocity vector of the next moment. According to the invention, the target velocity vector of the target at the current moment and the initial probabilities of the N motion vectors are used to act as input, the N motion vectors are used to act as a filter of an IMM (interactive multiple models) method, and the current probability of each motion vector is estimated. The motion vector, whose current probability is the maximum, of the N motion vectors is used to act as target velocity vector output of the next moment. The method provided by the invention can robustly track the direction sudden-changing maneuvering target.
Description
technical field [0001] The invention belongs to the technical field of maneuvering target tracking, and relates to a tracking method for a maneuvering target with a sudden change in direction. The method utilizes multistatic radar, and realizes direction alignment through an IMM (interactive multiple models, interactive multi-model) method based on motion vectors with different vector angles. Robust Tracking of Mutant Maneuvering Targets. Background technique [0002] Using multistatic radar to track maneuvering targets is an important development direction of battlefield reconnaissance. In modern warfare, multistatic radars use two or more separate bases, so that the transmitting station is set separately from the receiving station. Among them, the receiving station is passive, can be located in a very hidden place, and does not emit electromagnetic waves, so the anti-radiation missile can only track and attack the transmitting station, and will not destroy the receiving s...
Claims
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IPC IPC(8): G01S13/66
CPCG01S13/66
Inventor 黄晓涛刘文彦朱家华范崇祎雷鹏正周智敏
Owner NAT UNIV OF DEFENSE TECH