A method for extracting line-of-sight angular velocity of semi-strapdown radar seeker

A radar seeker and velocity extraction technology, which is used in navigation, navigation, mapping and navigation through velocity/acceleration measurement, which can solve the problems of semi-strapdown radar guidance technology that have not been reported in application, and achieve a reduction in volume. , The effect of simplifying the processing process and improving the accuracy of the output signal

Active Publication Date: 2017-12-01
CNGC INST NO 206 OF CHINA ARMS IND GRP
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  • Abstract
  • Description
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Problems solved by technology

[0005] At present, the optical semi-strapdown guidance system has been reported, but the semi-strapdown radar guidance technology has not yet been reported.

Method used

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  • A method for extracting line-of-sight angular velocity of semi-strapdown radar seeker
  • A method for extracting line-of-sight angular velocity of semi-strapdown radar seeker
  • A method for extracting line-of-sight angular velocity of semi-strapdown radar seeker

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Embodiment Construction

[0044] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0045] First consider the simplest single-plane guidance situation, such as figure 1 Shown:

[0046] ψ S The line-of-sight angle of the target relative to the inertial system

[0047] ψ B The attitude angle of the missile relative to the inertial frame

[0048] ψ L target frame angle

[0049] ψ L = ψ S -ψ B (1)

[0050] Derivative on both sides of the above formula:

[0051] ω L = ω S -ω B (2)

[0052] ω L is the rotational speed of the antenna relative to the projectile, ω S is the line-of-sight angular velocity of the target, ω B is the rotational velocity of the missile body relative to the inertial space. In order to solve for ω S Need to measure out ω B , ω L .

[0053]The problem of three-dimensional space becomes very complicated: the angular velocity of the line of sight of the target is no longer a simple addition of the angular v...

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Abstract

The invention relates to a semi-strapdown radar seeker line-of-sight rate extraction method. A target motion differential equation is established under an antenna coordinate system so as to obtain the line-of-sight rate information of a target, problems related to rotational motion and rotation order are avoided, and the treatment process is simplified, thereby obtaining the line-of-sight rate information of the target.

Description

technical field [0001] The invention belongs to the field of semi-strapdown radar guidance, and mainly relates to line-of-sight angular velocity signal extraction and related tracking control technology. Background technique [0002] The millimeter-wave seeker is mainly used for the precise guidance of short-range ground-to-ground and anti-ship missiles. It has strict requirements on the size and cost of the seeker. The proportional guidance system has high requirements on the quality of the line-of-sight angular velocity. The stable structure of the axis rate gyro is realized, and the space velocity feedback of the gyroscope is used to realize stable tracking. For this reason, the servo system must choose a high-quality rate gyro, which brings great difficulties to the miniaturization and low-cost implementation of the seeker. Since the end of the 20th century, semi-strapdown guidance seekers have begun to appear abroad, such as the American AIM-9X air-to-air missile and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20G01C21/16
CPCG01C21/165G01C21/20
Inventor 张江华张昕
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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