A Ballistic Missile Structural Parameter Estimation Method Based on Elimination of Centroid Height Parameters

Abstract

The invention discloses a ballistic missile structure parameter estimation method based on the center of mass height parameter elimination. The method is as follows: first establish the geometric model of the ballistic missile target and construct the objective function; then launch a single frequency pulse to the target, receive the echo of the target and perform time-frequency transformation to obtain the time-frequency diagram of the echo; simulate the time-frequency diagram The instantaneous micro-Doppler curves of the cone bottom and cone top are obtained; according to the two adjacent maximum values ​​in the cone top instantaneous micro-Doppler curves, the precession period of the target is obtained, and the cone bottom instantaneous micro-Doppler curves Add the first half cycle and the second half cycle in one cycle to get the target curve; finally, perform least squares on the target curve and the target function to get the radius and precession angle of the target; use the cone top and cone bottom instantaneous micro-Doppler The maximum value of the Le curve is used to obtain the height of the target and the height of the center of mass. The invention eliminates the influence of the height parameter of the center of mass on the ballistic missile structure parameter estimation, and improves the ballistic missile target estimation accuracy.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a ballistic missile structure parameter estimation method based on the elimination of the barycenter height parameter. Background technique [0002] When the ballistic missile is flying at high speed in the air, the spin motion maintains the stability of its attitude, and the lateral interference will convert the spin motion into the form of precession. Movement refers to the rotation of the ballistic missile around the conical axis of rotation while it is spinning. [0003] Space target recognition is a crucial link in the ballistic missile defense system. The mid-course flight is the longest in the flight process of the ballistic missile, and the space environment is relatively simple. The target at this time is that the target rotates slightly around the center of mass while translating. Precession can reflect more target features, such as target size and mass dist...

AI Technical Summary

Problems solved by technology

However, neither of these two types of methods can eliminate the influence of the center of mass height parameter on the estimation of ballistic missile structure parameters, resulting in a large error in ballistic missile target estimation

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