A method for predicting and evaluating system strong electromagnetic pulse coupling

Abstract

A system strong electromagnetic pulse coupling prediction and evaluation method includes defining the electromagnetic parameters and electromagnetic sensitivity threshold of a receiving device of a system-level device, establishing an equivalent transceiver port model, establishing a system outer contour model, loading the system outer contour model with the equivalent transceiver port model to construct a system strong electromagnetic pulse coupling prediction and evaluation environment, obtaining the system receiving antenna isolation A to strong magnetic pulses, obtaining the system strong electromagnetic pulse electromagnetic coupling degree D, comparing the system strong electromagnetic pulse electromagnetic coupling degree D with the electromagnetic sensitivity threshold of the receiving device, and obtaining the system strong electromagnetic pulse coupling prediction and evaluation result. By executing the system strong electromagnetic pulse coupling prediction and evaluation method, performing data error rate comparison and outputting the test results, a quantitative evaluation of the system's strong electromagnetic pulse electromagnetic coupling is achieved in the system equipment scheme design stage. The prediction and evaluation method is simple and highly operable, and can effectively support the strong electromagnetic pulse compatibility design of system-level equipment.

Description

Technical Field

[0001] The invention belongs to the field of electromagnetic field testing, and in particular relates to a method for predicting and evaluating system strong electromagnetic pulse coupling. Background Art

[0002] System-level equipment will experience abnormal working in a strong electromagnetic pulse environment. The electromagnetic pulse compatibility of system-level equipment should be considered in the scheme design stage, and a strong electromagnetic pulse coupling prediction and evaluation of system-level equipment is required. Since there is no specific model that can support the prediction of strong electromagnetic pulse coupling of system-level equipment in the scheme design stage, the existing strong electromagnetic pulse coupling prediction and evaluation methods of system-level equipment are difficult to carry out in the scheme design stage and cannot effectively support the strong electromagnetic pulse compatibility design of system-level equipment.

[0003] For example, the patent document with the publication number CN115758972A specifically discloses a simulation prediction method for strong electromagnetic pulse coupling of RF receivers. It constructs strong electromagnetic pulse signals through visual, object-oriented, event-driven VBA macro programming, and predicts the coupling characteristics of RF receiver gaps and cables based on the "field" and "path" of the finite difference time domain method FDTD and the transmission matrix method TLM. It analyzes the strong electromagnetic pulse coupling path, electric field distribution, surface current and other strong electromagnetic pulse characteristic parameters, and finally obtains accurate simulation prediction results to provide support for the strong electromagnetic protection design of RF receivers. However, the simulation analysis, simulation processing, and simulation optimization process of the existing technology are complex, difficult to operate, and cannot be quantitatively evaluated.

[0004] In summary, it is difficult to carry out strong electromagnetic pulse coupling prediction and evaluation in the system-level equipment scheme design stage with the existing technology. There is an urgent need for a system strong electromagnetic pulse coupling prediction and evaluation method that can be quantitatively carried out in the system-level equipment scheme design stage, with simple methods and high operability. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a system strong electromagnetic pulse coupling prediction and evaluation method, comprising the following steps:

[0006] Define the electromagnetic parameters and electromagnetic sensitivity thresholds of the receiving equipment of the system-level equipment;

[0007] Establish an equivalent transceiver port model that characterizes the strong electromagnetic pulse radiation characteristics and the system's strong electromagnetic pulse reception characteristics;

[0008] Establish a system contour model to characterize the characteristics of the strong electromagnetic pulse propagation environment;

[0009] Loading the equivalent transceiver port model through the system outer contour model to build a system strong electromagnetic pulse coupling prediction and evaluation environment;

[0010] In the system strong electromagnetic pulse coupling prediction and evaluation environment, the system receiving antenna isolation A to the strong magnetic pulse is obtained by predicting the system strong magnetic pulse antenna isolation;

[0011] According to the electromagnetic parameters and A, a quantitative evaluation of the electromagnetic coupling of the system strong electromagnetic pulse is performed to obtain the electromagnetic coupling degree D of the system strong electromagnetic pulse;

[0012] The system strong electromagnetic pulse electromagnetic coupling degree D is compared with the electromagnetic sensitivity threshold of the receiving device to determine the system strong electromagnetic pulse coupling prediction evaluation result.

[0013] Furthermore, the electromagnetic parameters of the receiving device of the system-level device include: the gain G of the strong electromagnetic pulse transmitting antenna in the direction of the system receiving antenna T , the gain G of the receiving antenna of the system in the direction of the strong electromagnetic pulse transmitting antenna R , the attenuation value S of the receiving antenna of the system in the strong electromagnetic pulse frequency band A and the out-of-band suppression value S of the system receiver in the strong electromagnetic pulse frequency band R .

[0014] Furthermore, the equivalent transceiver port model includes a receiving port model and a transmitting port model, wherein the receiving port model is an equivalent model of a receiving antenna on an electromagnetic pulse device, and the transmitting port model is an equivalent model of a strong electromagnetic pulse transmitting antenna on an electromagnetic pulse device.

[0015] Furthermore, the equivalent transceiver port models have the same operating frequency points and omnidirectional and uniform transceiver characteristics.

[0016] Furthermore, the system outer contour model is realized by structural three-dimensional modeling software, and the system external structure is a three-dimensional model of metal materials.

[0017] Furthermore, the evaluation formula for quantitative evaluation of electromagnetic coupling of the system strong electromagnetic pulse is:

[0018] D=G T +G R -AS A -S R .

[0019] Furthermore, the judgment method of the system strong electromagnetic pulse coupling prediction evaluation result is: if the system strong electromagnetic pulse electromagnetic coupling degree D is greater than the electromagnetic sensitivity threshold of the receiving device, the parameter value set by the system-level device in the scheme design stage is unqualified and parameter optimization design is required.

[0020] Further, the system strong magnetic pulse antenna isolation prediction includes the following steps:

[0021] Loading the system outer contour model and equivalent transceiver port model;

[0022] Move the equivalent transceiver port model to the corresponding position of the outer contour model;

[0023] Perform a strong electromagnetic pulse emission simulation of the system to obtain the receiving antenna isolation A of the receiving port model.

[0024] The beneficial effects of the present invention are as follows: the present invention establishes an equivalent transceiver port model and a system outer contour model by presetting the electromagnetic parameters and electromagnetic sensitivity thresholds of the receiving device of the system-level device, and the system outer contour model is loaded with the equivalent transceiver port model to construct a system strong electromagnetic pulse coupling prediction and evaluation environment, a system strong electromagnetic pulse antenna isolation prediction, and by executing the system strong electromagnetic pulse coupling prediction and evaluation method, a data error rate comparison is performed and the test results are output, thereby realizing a quantitative evaluation of the system's strong electromagnetic pulse electromagnetic coupling in the system equipment scheme design stage, and the prediction and evaluation method is simple and highly operable, and can effectively support the strong electromagnetic pulse compatibility design of system-level equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flowchart of the system strong electromagnetic pulse coupling prediction and evaluation provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0027] The embodiment of the present invention provides a method for predicting and evaluating strong electromagnetic pulse coupling of a system. By presetting the electromagnetic parameters and electromagnetic sensitivity threshold of a receiving device of a system-level device, an equivalent transceiver port model is established, and a system outer contour model is established. The system outer contour model is loaded with the equivalent transceiver port model to construct a system strong electromagnetic pulse coupling prediction and evaluation environment, a system strong electromagnetic pulse antenna isolation prediction, and a method for quantitatively evaluating the electromagnetic coupling of the system strong electromagnetic pulse are implemented, so as to realize quantitative evaluation of the electromagnetic coupling of the system strong electromagnetic pulse in the system equipment scheme design stage.

[0028] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the present invention provides a method for predicting and evaluating system strong electromagnetic pulse coupling, comprising the following steps:

[0030] S1100, defining electromagnetic parameters and electromagnetic sensitivity thresholds of a receiving device of a system-level device.

[0031] S1200, establishing an equivalent transceiver port model that characterizes strong electromagnetic pulse radiation characteristics and system strong electromagnetic pulse reception characteristics;

[0032] According to the working frequency bands of the strong electromagnetic pulse antenna and the receiving antenna on the system-level device, a pair of simple antenna three-dimensional structure models of the same structure working in the frequency band are established through electromagnetic field three-dimensional modeling simulation software, which serve as equivalent transceiver port models of the strong electromagnetic pulse antenna on the device and the disturbed antenna on the device. The coupling of the same structure is the largest, and the worst case is simulated for evaluation. The electromagnetic field three-dimensional modeling simulation software is, for example, CST and HFSS.

[0033] S1300, establish a system profile model to characterize the characteristics of the strong electromagnetic pulse propagation environment;

[0034] According to the dimensions and layout of the system-level equipment scheme design stage, the system outer contour model is established in the structural 3D modeling software. Generally, there will be a ready-made preliminary outer contour model available for use in the system-level equipment scheme design stage or scheme demonstration stage. The structural 3D modeling software is, for example, UG.

[0035] S1400, loading the equivalent transceiver port model through the system outer contour model to construct a system strong electromagnetic pulse coupling prediction and evaluation environment.

[0036] S1500, obtaining the system's receiving antenna isolation A for strong magnetic pulses by predicting the system's strong magnetic pulse antenna isolation in the system's strong electromagnetic pulse coupling prediction and evaluation environment;

[0037] The acquisition of the receiving antenna isolation A can be obtained by a conventional calculation method when the transceiver antenna is not blocked by the outer contour of the system; however, when the transceiver antenna is blocked by the outer contour of the system, the acquisition of the receiving antenna isolation A can only be obtained by simulation, and the specific simulation is as follows:

[0038] In the electromagnetic field three-dimensional modeling and simulation software, a system outer contour model and an equivalent transceiver port model are imported or established, and after the equivalent transceiver port model is moved to a position corresponding to the system outer contour model according to the layout of the system-level device design solution, the isolation of the transceiver port model is obtained through the electromagnetic field three-dimensional modeling and simulation software;

[0039] The isolation refers to the amount of electromagnetic waves emitted by an antenna received by the receiving port after being blocked by the outer contour of the system and affected by the posture of the transmitting and receiving ports. The greater the isolation, the fewer electromagnetic waves are received and the smaller the impact on the receiving antenna.

[0040] S1600: Perform a quantitative evaluation of electromagnetic coupling of a system strong electromagnetic pulse according to the electromagnetic parameters and A to obtain a degree of electromagnetic coupling D of the system strong electromagnetic pulse.

[0041] S1700, comparing the system strong electromagnetic pulse electromagnetic coupling degree D with the electromagnetic sensitivity threshold of the receiving device to determine a system strong electromagnetic pulse coupling prediction evaluation result.

[0042] In this embodiment, the electromagnetic parameters of the receiving device of the system-level device in step S1100 include: the gain G of the strong electromagnetic pulse transmitting antenna in the direction of the system receiving antenna T , the gain G of the receiving antenna of the system in the direction of the strong electromagnetic pulse transmitting antenna R , the attenuation value S of the receiving antenna of the system in the strong electromagnetic pulse frequency band A and the out-of-band suppression value S of the system receiver in the strong electromagnetic pulse frequency band R .

[0043] In this embodiment, the equivalent receiving and transmitting port model in step S1200 includes a receiving port model and a transmitting port model. The receiving port model is an equivalent model of a receiving antenna on an electromagnetic pulse device, and the transmitting port model is an equivalent model of a strong electromagnetic pulse transmitting antenna on an electromagnetic pulse device. Because the specific structure and form of the strong electromagnetic pulse antenna on the system-level device and the receiving antenna on the system-level device have not been formed in the scheme design or demonstration stage of the system-level device, an equivalent antenna model is used instead.

[0044] In this embodiment, the equivalent transceiver port models in step S1200 have the same operating frequency points and omnidirectional and uniform transceiver characteristics.

[0045] In this embodiment, the system outer contour model in step S1300 is implemented by structural three-dimensional modeling software, and the system external structure is a three-dimensional model of metal materials.

[0046] In this embodiment, the evaluation formula for quantitative evaluation of electromagnetic coupling of the system strong electromagnetic pulse in step S1600 is:

[0047] D=G T +G R -AS A -S R .

[0048] In this embodiment, the method for judging the prediction and evaluation result of the system strong electromagnetic pulse coupling in step S1700 is: if the electromagnetic coupling degree D of the system strong electromagnetic pulse is greater than the electromagnetic sensitivity threshold of the receiving device, the parameter value set by the system-level device in the scheme design stage is unqualified and parameter optimization design is required.

[0049] In this embodiment, the system strong magnetic pulse antenna isolation prediction in step S1500 includes the following steps:

[0050] Loading the system outer contour model and equivalent transceiver port model;

[0051] Move the equivalent transceiver port model to the corresponding position of the outer contour model;

[0052] Perform a strong electromagnetic pulse emission simulation of the system to obtain the receiving antenna isolation A of the receiving port model.

[0053] An embodiment of the present invention provides a method for predicting and evaluating strong electromagnetic pulse coupling of a system. The method for predicting and evaluating strong electromagnetic pulse coupling of a system is executed by presetting electromagnetic parameters and electromagnetic sensitivity thresholds of a receiving device of a system-level device, performing data error rate comparison and outputting test results, thereby realizing quantitative evaluation of the strong electromagnetic pulse electromagnetic coupling of the system in the system equipment scheme design stage.

[0054] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A system strong electromagnetic pulse coupling prediction and evaluation method, characterized in that: The following steps are involved: Define the electromagnetic parameters and electromagnetic sensitivity thresholds of the receiving equipment of the system-level equipment; Establish an equivalent transceiver port model that characterizes the strong electromagnetic pulse radiation characteristics and the system's strong electromagnetic pulse reception characteristics; Establish a system contour model to characterize the characteristics of the strong electromagnetic pulse propagation environment; Loading the equivalent transceiver port model through the system outer contour model to build a system strong electromagnetic pulse coupling prediction and evaluation environment; In the system strong electromagnetic pulse coupling prediction and evaluation environment, the system receiving antenna isolation A to the strong magnetic pulse is obtained by predicting the system strong magnetic pulse antenna isolation; According to the electromagnetic parameters and A, a quantitative evaluation of the electromagnetic coupling of the system strong electromagnetic pulse is performed to obtain the electromagnetic coupling degree D of the system strong electromagnetic pulse; The system strong electromagnetic pulse electromagnetic coupling degree D is compared with the electromagnetic sensitivity threshold of the receiving device to determine the system strong electromagnetic pulse coupling prediction evaluation result.

2. The system strong electromagnetic pulse coupling prediction and evaluation method according to claim 1, characterized in that: The electromagnetic parameters of the receiving device of the system-level device include: the gain G of the strong electromagnetic pulse transmitting antenna in the direction of the system receiving antenna T , the gain G of the receiving antenna of the system in the direction of the strong electromagnetic pulse transmitting antenna R , the attenuation value S of the receiving antenna of the system in the strong electromagnetic pulse frequency band A and the out-of-band suppression value S of the system receiver in the strong electromagnetic pulse frequency band R .

3. The system strong electromagnetic pulse coupling prediction and evaluation method according to claim 1, characterized in that: The equivalent transceiver port model includes a receiving port model and a transmitting port model. The receiving port model is an equivalent model of a receiving antenna on an electromagnetic pulse device, and the transmitting port model is an equivalent model of a strong electromagnetic pulse transmitting antenna on the electromagnetic pulse device.

4. The system strong electromagnetic pulse coupling prediction and evaluation method as claimed in claim 3, characterized in that: The equivalent transceiver port models have the same operating frequency points and omnidirectional and uniform transceiver characteristics.

5. The system strong electromagnetic pulse coupling prediction and evaluation method according to claim 1, characterized in that: The system outer contour model is realized by structural three-dimensional modeling software, and the system external structure is a three-dimensional model of metal materials.

6. The system strong electromagnetic pulse coupling prediction and evaluation method as claimed in claim 2, characterized in that: The evaluation formula for quantitative evaluation of electromagnetic coupling of the system's strong electromagnetic pulse is: D=G T +G R -A-S A -S R 。 7. The system strong electromagnetic pulse coupling prediction and evaluation method according to claim 1, characterized in that: The judgment method of the system strong electromagnetic pulse coupling prediction evaluation result is: if the system strong electromagnetic pulse electromagnetic coupling degree D is greater than the electromagnetic sensitivity threshold of the receiving device, the parameter value set by the system-level device in the scheme design stage is unqualified and parameter optimization design is required.

8. The system strong electromagnetic pulse coupling prediction and evaluation method according to claim 1, characterized in that: The system strong magnetic pulse antenna isolation prediction includes the following steps: Loading the system outer contour model and equivalent transceiver port model; Move the equivalent transceiver port model to the corresponding position of the outer contour model; Perform a strong electromagnetic pulse emission simulation of the system to obtain the receiving antenna isolation A of the receiving port model.

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