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Method for accurately determining time delay of strapdown decoupling of strapdown seeker

A technology of time delay and seeker, applied in the field of seeker, can solve problems such as ballistic divergence, failure to hit the target, phase misalignment, etc.

Pending Publication Date: 2022-02-01
JIANGXI HONGDU AVIATION IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Strapdown seeker needs strapdown decoupling to send line-of-sight angular velocity as a guidance signal, and time delay is the most significant factor among many factors affecting strapdown seeker decoupling. If time delay is not accurate, seeker data The phase of the information and the attitude data of the projectile is misaligned, and the guidance signal output by strapdown decoupling will cause the trajectory to diverge and fail to hit the target

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  • Method for accurately determining time delay of strapdown decoupling of strapdown seeker
  • Method for accurately determining time delay of strapdown decoupling of strapdown seeker
  • Method for accurately determining time delay of strapdown decoupling of strapdown seeker

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Embodiment 1

[0030] combine figure 1 As shown, this embodiment provides a method for accurately determining the time delay through strapdown decoupling of a strapdown seeker, and the method includes the following steps:

[0031] Step 1: Obtain the inertial navigation attitude disturbance data and the seeker output angle measurement data at the same time scale through the hardware-in-the-loop simulation with attitude disturbance;

[0032] Obtaining the inertial navigation attitude disturbance data and the seeker output angle measurement data under the unified time scale is the premise of the strapdown seeker decoupling method to accurately determine the time delay. The two columns of data have the same time scale, that is, the two columns of data have same time scale. This method obtains the maximum correlation coefficient of two columns of data and the time scale corresponding to the maximum coefficient by using the cross-correlation function, and obtaining two columns of data with the sa...

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Abstract

The invention belongs to the technical field of seekers, and provides a method for accurately determining time delay of strapdown decoupling of a strapdown seeker. The method adopts a cross-correlation function method to accurately determine a relative time difference delta t between seeker angle data information and missile attitude angle data information. In strapdown decoupling, missile attitude data information is delayed by delta t and then is decoupled with the seeker so that obvious influence caused by time delay is eliminated, stable and reliable guidance signals are output through strapdown decoupling, and development of a strapdown seeker application technology, especially development of a strapdown passive radar seeker application technology is promoted.

Description

technical field [0001] The invention belongs to the technical field of seekers, and in particular relates to a method for accurately determining time delay by strapdown decoupling of a strapdown seeker. Background technique [0002] The special angle measurement method and error correction method of the strapdown passive radar seeker have proved that the strapdown passive radar seeker has significant advantages in anti-decoy compared with the frame passive radar seeker. Furthermore, strapdown is an important way for the seeker to achieve low cost, miniaturization, and light weight. [0003] The strapdown seeker needs to be strapdown decoupled to send the line-of-sight angular velocity as a guidance signal, and the time delay is the most significant factor among many factors affecting the strapdown decoupling of the strapdown seeker. If the time delay is not accurate, the seeker data The information is misaligned with the attitude data of the projectile, and the guidance sig...

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Application Information

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IPC IPC(8): G01C25/00G01S7/40
CPCG01S7/40G01C25/005
Inventor 吴寿龙龚汉华王卫华王剑琴周海云陈建东危芬刘翔曹阳宫庆坤许平张司兴黄新俊毛红敏常俊利
Owner JIANGXI HONGDU AVIATION IND GRP