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Radar seeker angle measurement curve fitting method

A radar seeker and curve fitting technology, which is applied to radio wave measurement systems, instruments, etc., can solve problems such as angle error limit errors, radar seeker angle measurement curve fitting, etc., to ensure accuracy and solve dual problems. Value issues, the effect of reducing workload

Active Publication Date: 2020-04-10
CNGC INST NO 206 OF CHINA ARMS IND GRP
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Problems solved by technology

[0008] The main problem solved by the present invention is the problem of radar seeker angle measurement curve fitting. Aiming at the problem that the third-order polynomial has double value in the original method, which leads to the problem of angular error limit error in some cases, a calibration system without modification is proposed. Hardware, seeker angle measurement curve fitting method that is easy to implement in engineering

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  • Radar seeker angle measurement curve fitting method

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Embodiment Construction

[0023] The main idea of ​​the radar seeker angle measurement curve fitting method is to use odd power terms to form a fitting polynomial, so that the fitting curve becomes an odd function, and its dual value is eliminated mathematically. Express the goniometric curve as:

[0024] y=a x 3 +b x+c

[0025] Among them, a is the coefficient of the cubic term, b is the coefficient of the first term, c is the coefficient of the constant term, y is the standard angle error and x is the measured angle error. It can be seen that the even power term has been removed. Using the least squares method for fitting, its essence is to square the error between each fitting point and the data point and then sum, if the fitting curve minimizes the sum of squares, then the best fitting coefficient is obtained, if There are N test data data, and the sum of squared errors is:

[0026]

[0027] the y i is the standard angle error of different positions, x i is the angular error of the corresp...

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Abstract

The invention relates to a radar seeker angle measurement curve fitting method, which is used for solving the problems that angle error limiting fails at some special moments, generated curve parameters are many and the input workload is large since binaryzation exists in a traditional radar seeker angle measurement curve fitting method. According to the radar seeker angle measurement curve fitting method, a fitting polynomial is constructed only by using odd power terms, the binaryzation of a fitting curve is eliminated, the purpose of correctly limiting radar seeker angle errors is achievedon the premise that the fitting precision is not changed, and the number of parameters is reduced to a certain extent. The actual use result of a certain radar seeker shows that the problem of fittingcurve binaryzation can be effectively solved by adopting the radar seeker angle measurement curve fitting method disclosed by the invention, the phenomenon of angular error limiting failure is avoided on the premise of ensuring the precision, and the workload of parameter input is reduced to a certain extent.

Description

technical field [0001] The invention relates to the field of calibration of radar seeker angle measurement parameters, in particular to a radar seeker angle measurement curve fitting method. Background technique [0002] Radar seekers mostly use single-pulse angle measurement, and the original value of the angle error is calculated by the ratio of the amplitude of the differential signal. The original value is a curved hyperbola, which has a one-to-one correspondence with the true angle error in the linear angle measurement area. The true angle error is the angle between the target line-of-sight angle and the electrical axis. In the guidance, the output angle error of the radar seeker must be as consistent as possible with the true angle error. Therefore, the radar seeker needs to fit the original angle error in the linear angle measurement area to the real angle error through a mathematical relationship before use. [0003] The original value of the angular error is expre...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 尚煜张江华聂强李甲林吴一龙职晓桑多鹏刘婷
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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