CN-122017379-A - Electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling

CN122017379ACN 122017379 ACN122017379 ACN 122017379ACN-122017379-A

Abstract

The invention discloses an electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling, which comprises the steps of determining a first frequency range based on a working frequency range of equipment with potential interference to be tested and the working frequency range of the equipment to be tested, determining discrete frequency sampling points in the first frequency range based on an ideal electromagnetic sensitivity threshold function of the equipment to be tested, determining an electromagnetic sensitivity threshold estimation function of the equipment to be tested in the first frequency range based on a difference sequence between an actually measured electromagnetic sensitivity threshold of the equipment to be tested and the ideal electromagnetic sensitivity threshold of the equipment to be tested in the discrete frequency sampling points, and determining an estimated value of the electromagnetic sensitivity threshold of the equipment to be tested in a target frequency range by the electromagnetic sensitivity threshold estimation function. The method and the device have the advantages of considering pertinence, efficiency and reliability of threshold estimation, and being capable of effectively meeting the electromagnetic sensitivity threshold estimation requirement in a complex electromagnetic environment.

Inventors

HU YILI
CHEN XI
TAN HUI
WANG SHENGHAN
CHEN LIANG

Assignees

中国舰船研究设计中心

Dates

Publication Date: 20260512
Application Date: 20251017

Claims (10)

1. An electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling, which is characterized by comprising the following steps: Determining a first frequency range based on a working frequency range of equipment with potential interference to equipment to be tested and the working frequency range of the equipment to be tested, wherein the working frequency range of the equipment to be tested comprises the first frequency range; Determining discrete frequency sampling points in the first frequency range based on an ideal electromagnetic sensitivity threshold function of the equipment to be tested, wherein the ideal electromagnetic sensitivity threshold function is used for representing the association relationship between each frequency in the working frequency range of the equipment to be tested and the ideal electromagnetic sensitivity threshold of the equipment to be tested in an ideal electromagnetic environment under each frequency; And determining an electromagnetic sensitivity threshold estimation function of the equipment to be tested in a first frequency range based on a difference sequence between the actually measured electromagnetic sensitivity threshold and the ideal electromagnetic sensitivity threshold of the equipment to be tested in the discrete frequency sampling points, wherein the electromagnetic sensitivity threshold estimation function is used for determining an estimated value of the electromagnetic sensitivity threshold of the equipment to be tested in a target frequency, and the target frequency is in the first frequency range.
2. The electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling of claim 1, wherein the expression of the ideal electromagnetic sensitivity threshold function comprises: ; Wherein, the As an ideal electromagnetic sensitivity threshold function, At frequency for the device under test in an ideal electromagnetic environment The ideal electromagnetic sensitivity threshold value is below, In order to be a frequency of the light, Is the preset ideal interference gaussian variance, Is an ideal interference Gaussian distribution sequence.
3. The method for estimating an electromagnetic sensitivity threshold based on modeling of a difference in sensitivity response according to claim 1, wherein said determining discrete frequency sampling points within said first frequency range based on an ideal electromagnetic sensitivity threshold function of said device under test comprises: determining the discrete frequency sampling point based on at least one point randomly determined on a curve of an ideal electromagnetic sensitivity threshold function of the device under test, or Determining the discrete frequency sampling point based on the inflection point on the curve of the ideal electromagnetic sensitivity threshold function of the device under test, or And determining the discrete frequency sampling points based on the realisable points on the curve of the ideal electromagnetic sensitivity threshold function of the equipment to be tested.
4. The method of claim 3, wherein determining the discrete frequency sample points based on inflection points on a curve of an ideal electromagnetic sensitivity threshold function of the device under test comprises: Determining the discrete frequency sampling points based on at least one of: At least one realisable point in the inflection point; At least one realisable point on the curve, where the difference between the frequency and the frequency of the non-realisable point in the inflection point is less than a preset threshold; And on the curve, the difference between the frequency and the frequency of the realisable point in the inflection point is smaller than at least one realisable point of a preset threshold.
5. The method for estimating an electromagnetic sensitivity threshold based on differential modeling of sensitivity response according to claim 1, wherein determining an electromagnetic sensitivity threshold estimation function of the device under test in the first frequency range based on a sequence of differences between the measured electromagnetic sensitivity threshold and an ideal electromagnetic sensitivity threshold of the device under test in the discrete frequency sampling points comprises: Determining an electromagnetic sensitivity threshold difference function of the equipment to be tested in the first frequency range through a cubic spline interpolation method based on a difference sequence between an actual electromagnetic sensitivity threshold and an ideal electromagnetic sensitivity threshold of the equipment to be tested in the discrete frequency sampling points; and determining an electromagnetic sensitivity threshold estimation function of the equipment to be tested in the first frequency range based on the electromagnetic sensitivity threshold difference function of the equipment to be tested in the first frequency range and the ideal electromagnetic sensitivity threshold function of the equipment to be tested.
6. The method for estimating an electromagnetic sensitivity threshold based on modeling of a difference in sensitivity response according to claim 5, wherein the constructing an electromagnetic sensitivity threshold difference function of the device under test in the first frequency range by a cubic spline interpolation method based on a difference sequence between an actual electromagnetic sensitivity threshold and an ideal electromagnetic sensitivity threshold of the device under test in the discrete frequency sampling points comprises: Determining coefficients according to the continuity condition of the cubic spline polynomial curve and the difference sequence between the actually measured electromagnetic sensitivity threshold value and the ideal electromagnetic sensitivity threshold value of the device to be tested at the discrete frequency sampling points , ; Based on the coefficient And determining an electromagnetic sensitivity threshold difference function of the equipment to be tested in the first frequency range.
7. The method of claim 6, wherein the expression of the electromagnetic sensitivity threshold difference function comprises: ; Wherein, the ; Representation of The first of the discrete frequency sampling points Discrete frequency sampling points, Representation of The first of the discrete frequency sampling points Discrete frequency sampling points.
8. The method of claim 5, wherein determining the electromagnetic sensitivity threshold estimation function of the device under test in the first frequency range based on the electromagnetic sensitivity threshold difference function of the device under test in the first frequency range and the ideal electromagnetic sensitivity threshold function of the device under test comprises: Based on electromagnetic sensitivity threshold difference function of the device to be tested in the first frequency range And an ideal electromagnetic sensitivity threshold function of the device under test Determining an electromagnetic sensitivity threshold estimation function of the device to be tested in a first frequency range The expression of (2) includes: 。
9. The method for estimating an electromagnetic sensitivity threshold based on modeling of a difference in sensitivity response according to claim 1, wherein determining the first frequency range based on the operating frequency range of the device having potential interference with the device under test and the operating frequency range of the device under test comprises: The method comprises the steps of determining a first frequency range based on an operating frequency range of a device with potential interference to a device to be tested and an overlapping frequency range between the operating frequency ranges of the device to be tested.
10. An electromagnetic sensitivity threshold estimation system based on sensitivity response difference modeling is characterized by comprising a first determining module, a second determining module and a third determining module, wherein, The first determining module is used for determining a first frequency range based on the working frequency range of equipment with potential interference to the equipment to be tested and the working frequency range of the equipment to be tested, wherein the working frequency range of the equipment to be tested comprises the first frequency range; the second determining module is used for determining discrete frequency sampling points in the first frequency range based on an ideal electromagnetic sensitivity threshold function of the equipment to be tested, wherein the ideal electromagnetic sensitivity threshold function is used for representing the association relationship between each frequency in the working frequency range of the equipment to be tested and the ideal electromagnetic sensitivity threshold of the equipment to be tested in an ideal electromagnetic environment under each frequency; The third determining module is used for determining an electromagnetic sensitivity threshold estimation function of the device to be tested in a first frequency range based on a difference sequence between an actual electromagnetic sensitivity threshold and an ideal electromagnetic sensitivity threshold of the device to be tested in the discrete frequency sampling points, wherein the electromagnetic sensitivity threshold estimation function is used for determining an estimated value of the electromagnetic sensitivity threshold of the device to be tested in a target frequency, and the target frequency is in the first frequency range.

Description

Electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling Technical Field The invention relates to the technical field of electromagnetic spectrum planning and management and control, in particular to an electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling. Background In electromagnetic compatibility tests, prediction and evaluation of electromagnetic sensitivity effect thresholds are key technologies for guaranteeing reliable operation of electronic equipment. Along with the improvement of the complexity of a modern electronic system and the increasing complexity of an electromagnetic environment, in order to master the change rule of the sensitive response of equipment, a corresponding electromagnetic compatibility test can be carried out in an ideal training environment. However, under the influence of factors such as environmental noise, device aging and the like in an actual use environment, the sensitivity threshold of the equipment to electromagnetic interference presents nonlinear change characteristics, wherein the nonlinear characteristics are mainly characterized in that actual measurement threshold random fluctuation generated by superposition influence of all factors is difficult to analyze the change rule of the threshold. The traditional method adopts a fixed order polynomial or linear regression to fit the change rule of the threshold value, and is difficult to adapt to nonlinear dynamic changes caused by multi-factor coupling of temperature, noise, material characteristics and the like in the actual environment. In addition, the conventional method often relies on R 2 (decision coefficient), AIC (red pool information criterion)/BIC (bayesian information criterion) as the evaluation criteria for goodness of fit, which is prone to over-fitting or under-fitting phenomena. Disclosure of Invention The invention mainly aims to provide an electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling, which realizes effective estimation of an electromagnetic sensitivity effect threshold of equipment in an actual application environment and improves the accuracy and practicability of threshold modeling. The technical scheme adopted by the invention is that the electromagnetic sensitivity threshold estimation method based on sensitivity response difference modeling comprises the following steps: Determining a first frequency range based on a working frequency range of equipment with potential interference to equipment to be tested and the working frequency range of the equipment to be tested, wherein the working frequency range of the equipment to be tested comprises the first frequency range; Determining discrete frequency sampling points in the first frequency range based on an ideal electromagnetic sensitivity threshold function of the equipment to be tested, wherein the ideal electromagnetic sensitivity threshold function is used for representing the association relationship between each frequency in the working frequency range of the equipment to be tested and the ideal electromagnetic sensitivity threshold of the equipment to be tested in an ideal electromagnetic environment under each frequency; And determining an electromagnetic sensitivity threshold estimation function of the equipment to be tested in a first frequency range based on a difference sequence between the actually measured electromagnetic sensitivity threshold and the ideal electromagnetic sensitivity threshold of the equipment to be tested in the discrete frequency sampling points, wherein the electromagnetic sensitivity threshold estimation function is used for determining an estimated value of the electromagnetic sensitivity threshold of the equipment to be tested in a target frequency, and the target frequency is in the first frequency range. According to the technical scheme, the expression of the ideal electromagnetic sensitivity threshold function comprises: ; Wherein, the As an ideal electromagnetic sensitivity threshold function,At frequency for the device under test in an ideal electromagnetic environmentThe ideal electromagnetic sensitivity threshold value is below,In order to be a frequency of the light,Is the preset ideal interference gaussian variance,Is an ideal interference Gaussian distribution sequence. According to the above technical solution, the determining discrete frequency sampling points in the first frequency range based on the ideal electromagnetic sensitivity threshold function of the device to be tested includes: determining the discrete frequency sampling point based on at least one point randomly determined on a curve of an ideal electromagnetic sensitivity threshold function of the device under test, or Determining the discrete frequency sampling point based on the inflection point on the curve of the ideal electromagnetic sensitivity threshold function