Reentry maneuvering trajectory target tracking algorithm based on variable structure multiple models

Abstract

The invention discloses a reentry maneuvering trajectory target tracking algorithm based on variable structure multiple models. The reentry maneuvering trajectory target tracking algorithm comprises the following steps: S1, constructing a reentry maneuvering trajectory target tracking algorithm model based on variable structure multiple models; S2, performing conversion mode complementary combination on the basic models in the state fusion estimation model set, and performing complementary interaction on the augmented models; S3, performing first state filtering on the basic model mode and the augmented model, and performing first updating on the mode probability; S4, performing first fusion output on the state and the covariance subjected to the first filtering and updating; S5, performing augmented model matching degree detection on a first fusion output result; and S6, updating a model conversion probability matrix. Through verification, the algorithm has the characteristics of high convergence speed and high steady-state precision in the reentry maneuvering missile target tracking process.

Description

technical field [0001] The invention relates to the technical field of signal and information processing, in particular to a reentry maneuver ballistic target tracking algorithm based on variable structure multi-models. Background technique [0002] With the continuous development of ballistic missile technology, re-entry maneuver has become an important means of ballistic missile penetration. In order to effectively track re-entry maneuver ballistic targets, Li Xiaorong et al. targets” (IEEETransactions on Aerospace and Electronic Systems, 2010, 46(1):96-119) carried out a detailed force analysis on reentry maneuvering ballistic targets and gave an acceleration dynamics model with aerodynamic parameters, describing The relationship between target acceleration and position, velocity and aerodynamic parameters is obtained, and on this basis, a piecewise uniform acceleration (PCA. Piecewise constant acceleration) model that can be used for filter estimation is given; When the...

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Problems solved by technology

[0005] For above-mentioned existing problems, the object of the present invention is to provide a kind of re-entry maneuvering ballistic target tracking algorithm based on variable structure multi-model, this algorithm is by based on model augmentation method and model dwelling-conversion structure, for re-entry maneuvering ballistic target The calculation of the trajectory can solve the problem that the existing re-entry tracking algorithm has poor anti-target maneuverability and it is difficult to effectively estimate the time-varying aerodynamic parameters of the target. It has been verified that the algorithm has a good performance in the process of re-entry maneuvering missile target tracking. The characteristics of high convergence speed and steady-state accuracy

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