Parameter extraction method for precession target structure

Abstract

The present invention discloses a parameter extraction method for a precession target structure. The method is characterized by comprising the steps of respectively acquiring the target radial length information of two radars based on the target one-dimensional range profiles of the two radars; according to the target radial length information, calculating the target radial length curves of the two radars; according to the target radial length curves of the two radars, calculating the target precession angles and the precession axis aspect angle difference of the two radars; according to the target precession angles, the precession axis aspect angle difference of the two radars and the target radial length curves of the two radars; calculating a target length and a target bottom-surface radius. Compared with the prior art, the structure parameters and the precession angles of cooperative targets and non-cooperative targets can be extracted at a relatively accuracy error. Meanwhile, the observation time required for extracting precession characteristics is greatly shortened.

Description

technical field [0001] The invention relates to the field of target feature extraction, in particular to a method for extracting structure parameters of a precession target. Background technique [0002] Compared with the boost and reentry stages, the middle stage of ballistic missiles has the characteristics of longer flight time and relatively simple space environment, and is an important stage of offensive and defensive confrontation. The warhead's spin and precession in the middle section constitute the fretting characteristics of the warhead target, which can be used as an important feature for warhead target recognition. For a precessing target, its period characteristic is very obvious, and its RCS (Radar Cross Section, radar cross section) undulation period is consistent with the precession period, and its precession period can be obtained by narrow-band RCS, but the precession angle and structure information of the target cannot be obtained by The target RCS is obt...

AI Technical Summary

Problems solved by technology

The former performs polynomial fitting on the target RCS, and uses the conical RCS estimation formula as the template information of the target to extract the precession parameters, but it needs to know the RCS characteristics of the target in various attitudes or the shape of the warhead target, which is not suitable for Non-cooperative targets have relatively large limitations; the second method is to extract the precession features by calculating the radial length or reconstructing the scattering center of the target through the one-dimensional range image of the target, but it requires a long observation time and large error

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