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Guidance information extracting method and system used for semi-strapdown infrared guiding head

A technology of infrared guidance and guidance information, applied in guidance methods, weapon accessories, offensive equipment, etc., can solve problems such as difficulty in obtaining relative pose estimation of projectiles, weak observability, and high requirements for filter parameter adaptability

Active Publication Date: 2020-02-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the infrared semi-strapdown seeker has the advantages of miniaturization and low cost, since its direct observation information is only the misalignment angle, the relative distance between projectile and target is not directly observable, so it needs to use filtering technology (such as extended Kalman filtering, etc.) Acquisition of other information required for guidance such as the relative distance between projectile and target
[0004] In the process of using filtering technology to estimate the relative position and orientation of projectiles and targets, there are mainly two types of problems: 1. Since the infrared semi-strapdown seeker target tracking system is essentially a passive tracking system, the observability of the system is weak, resulting in It is difficult to obtain a sufficiently accurate estimation of the missile-target relative pose; 2. During the guidance process of the missile, parameters such as the missile-target distance and the missile-target line of sight angle are always in the process of dynamic changes, resulting in the adaptability of the filtering parameters The requirements are high, and the selection of parameters needs to take into account the characteristics of the guidance system in different states

Method used

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  • Guidance information extracting method and system used for semi-strapdown infrared guiding head
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  • Guidance information extracting method and system used for semi-strapdown infrared guiding head

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Embodiment 1

[0065] figure 1 It is a flowchart of a method for extracting guidance information for a semi-strapdown infrared seeker according to Embodiment 1 of the present invention.

[0066] see figure 1 , the method for extracting guidance information for a semi-strapdown infrared seeker of an embodiment, comprising:

[0067] Step S1: Obtain the image of the infrared seeker, the parameters of the infrared seeker and the misalignment angle of the infrared seeker.

[0068] The infrared seeker parameters include the number of pixels in the horizontal direction of the infrared imaging plane, the number of pixels in the vertical direction of the infrared imaging plane, the length of the viewing plane, the width of the viewing plane, the horizontal field of view and the vertical field of view.

[0069] Step S2: Determine pixel information according to the infrared seeker image.

[0070] The pixel information includes the number of pixels occupied by the projected length of the target on th...

Embodiment 2

[0093] Step 1: According to the infrared seeker image and other reference auxiliary information, identify the type of the target, and then query the database according to the identification result to obtain the necessary information.

[0094] This step mainly achieves the acquisition of prior information, and retrieves target-related parameters in the database according to the target recognition results. The target recognition system is not the focus of this embodiment, so the introduction of this part is omitted. On the basis of the target recognition result, the infrared characteristic size of the relevant target (mainly referring to the characteristic size of the target part that can be sensed by the infrared imaging probe) is obtained by querying the relevant database, which is defined as a and b, respectively, the target infrared Feature length and target IR feature width.

[0095] Step 2: Estimate the relative distance of the projectile according to the infrared seeker ...

Embodiment 3

[0181] This embodiment provides a guidance information extraction system for a semi-strapdown infrared seeker, Figure 6 It is a schematic structural diagram of a guidance information extraction system for a semi-strapdown infrared seeker according to Embodiment 3 of the present invention.

[0182] see Figure 6 , the guidance information extraction system used in this embodiment for the semi-strapdown infrared seeker includes:

[0183] The image information acquisition module 601 is used to obtain the infrared seeker image, the infrared seeker parameters and the infrared seeker misalignment angle; the infrared seeker parameters include the number of pixels in the horizontal direction of the infrared imaging plane, the infrared imaging plane The number of pixels in the vertical direction, the length of the viewing plane, the width of the viewing plane, the horizontal viewing angle, and the vertical viewing angle.

[0184] The pixel information determining module 602 is used ...

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Abstract

The invention discloses a guidance information extracting method and system for a semi-strapdown infrared guiding head. The guidance information extracting method includes the steps that the infraredguiding head image, the infrared guiding head parameter and the infrared guiding head imbalance angle are obtained; the pixel information is determined according to the infrared guiding head image; the target infrared characteristic sizes are determined; the target infrared characteristic sizes includes the target infrared feather length and the target infrared characteristic width; based on the infrared imaging principle, the pixel information, the infrared guiding head parameter and the target infrared characteristic sizes are used for estimating the barrage relative distance, and the barrage relative distance estimated value is obtained; the infrared guiding head imbalance angle and the barrage relative distance estimated value are input into an adaptive unscented Kalman filter model, and guidance information is obtained; and the guidance information includes the barrage approaching speed, the barrage sight angle, the barrage sight angle rate and the target acceleration. By means ofthe guidance information extracting method and system for the semi-strapdown infrared guiding head, the accuracy for extracting guidance information of a missile provided with a semi-strapdown infrared guiding head can be improved, and accurate striking on a target is achieved.

Description

technical field [0001] The invention relates to the technical field of missile filter guidance, in particular to a guidance information extraction method and system for a semi-strapdown infrared seeker. Background technique [0002] With the rapid development of modern military technology, the war mode has gradually been upgraded from the original large-scale firepower suppression to point-target precision strikes. Precision-guided weapons have become an effective means of implementing precision strikes. Homing missiles are an important branch of precision-guided weapons. The seeker can complete the search, identification and tracking functions of the target, accurately provide the guidance information needed by the missile during flight, and then guide the missile to the target. [0003] Because the traditional seeker cannot identify multiple targets well, has poor omnidirectional field of view and weak anti-interference ability, in the field of seeker, the research hotspot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F41G3/22
CPCF41G3/22
Inventor 任章梁源李清东
Owner BEIHANG UNIV
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