Modified variable-structure grid interaction multi-model filtering method for tracking hypersonic-speed target of near space

An interactive multi-model and adjacent space technology, applied in the field of modified variable structure grid interactive multi-model filtering, can solve problems such as the inability to achieve high-precision and fast tracking of hypersonic maneuvering targets in adjacent space

Active Publication Date: 2015-07-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing single-model filtering algorithm, fixed-structure interactive multi-model algorithm and traditional variable-structure interactive multi-model algorith

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  • Modified variable-structure grid interaction multi-model filtering method for tracking hypersonic-speed target of near space
  • Modified variable-structure grid interaction multi-model filtering method for tracking hypersonic-speed target of near space
  • Modified variable-structure grid interaction multi-model filtering method for tracking hypersonic-speed target of near space

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specific Embodiment approach 1

[0028] Specific implementation mode one: combine figure 1 Describe this embodiment, a modified variable-structure grid interactive multi-model filtering method for tracking hypersonic targets in adjacent space, which is specifically carried out in accordance with the following steps:

[0029] Step 1, establish an inertial reference coordinate system, and establish the state equation of the target maneuvering motion in the inertial reference coordinate system, that is, the uniform speed turning model and the current statistical model of the maneuvering target to form a target motion model library;

[0030] Step 2, the central model adopts the current statistical model of the maneuvering target in the step 1, the left-turn model and the right-turn model adopt the uniform speed turning model in the step 1, and constitutes a modified variable structure filter by the central model, the left-turn model and the right-turn model;

[0031] Step 3, determining the measurement model of t...

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that an inertial reference coordinate system is established in the step 1, and the state equation of the maneuvering motion of the target is established in the inertial reference coordinate system, that is, the uniform turning model and the maneuvering target The current statistical model constitutes the target motion model library; the specific process is:

[0034] The motion state vector of the object in the adjacent space in the establishment of the inertial reference coordinate system is taken as:

[0035] X k = x k x · k x ...

specific Embodiment approach 3

[0078] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the center model in the step two adopts the current statistical model of the maneuvering target, the left-turn model and the right-turn model adopt a uniform speed turning model, through the center model, The left-turn model and the right-turn model constitute a modified variable structure filter; the specific process is:

[0079] (1) The central model adopts the current statistical model (CS) of the maneuvering target,

[0080] Solve the tracking of uniform motion and uniform acceleration motion in the linear motion of the target,

[0081] One method is to increase the CV and CA models at the same time, but this method of increasing the number of models will lead to model concentration and an increase in the number of models, resulting in competition among models and the dispersion of the posterior probability values ​​of each model that plays a decision-making...

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Abstract

The invention relates to a modified variable-structure grid interaction multi-model filtering method, and provides a modified variable-structure grid interaction multi-model filtering method for tracking a hypersonic-speed target of near space. By the modified variable-structure grid interaction multi-model filtering method for tracking the hypersonic-speed target of the near space, the problem that the existing single-model filtering algorithm, the existing fixed-structure interaction type multi-model algorithm and the traditional variable-structure interaction multi-model algorithm cannot be used for quickly tracking a hypersonic-speed maneuvering target of the near space precisely is solved. According to the technical scheme, the modified variable-structure grid interaction multi-model filtering method for tracking the hypersonic-speed target of the near space comprises the following steps of (1) establishing an inertial reference coordinate system and establishing a state equation of maneuvering movement of the target in the inertial reference coordinate system; (2) using a current statistics model of the maneuvering target as a central model and using constant-speed turning models as a left turning model and a right turning model; (3) determining a measurement model of a target tracking system on the basis of the inertial reference coordinate system; and (4) performing state estimation and error covariance matrix fusion. The modified variable-structure grid interaction multi-model filtering method for tracking the hypersonic-speed target of the near space is used for the field of aircrafts.

Description

technical field [0001] The invention relates to a modified variable structure grid interactive multi-model filtering method. Background technique [0002] Near-space hypersonic glide warhead is a kind of non-powered gliding in near space for thousands to more than 10,000 kilometers, and has strong maneuverability and penetration performance. It can carry nuclear warheads or conventional warheads to carry out long-distance rapid strikes. With a high lift-to-drag ratio, it can fly in the atmosphere for a long time, and its trajectory often presents a "jump" feature. When the near-space hypersonic cruise missile is cruising in the near space, its maneuvering mode is lateral pendulum maneuvering, and the altitude and speed remain basically unchanged. [0003] Judging from the current research situation of maneuvering target tracking at home and abroad, most of them use tracking filtering algorithms based on single models, such as Singer model and Jerk model, as well as fixed-st...

Claims

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Application Information

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IPC IPC(8): G01S13/66
CPCG01S13/66
Inventor 周荻秦雷李君龙
Owner HARBIN INST OF TECH
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