CN111398725A - Equipment electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment - Google Patents
Equipment electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The invention relates to a device electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment, which is characterized in that on the basis of the current single effect expression mainly based on a field radiation effect or a port injection effect and the like, the expression of the device electromagnetic damage effect is increased when a radiation field and a port act together; in a distributed system which comprises a plurality of electronic information devices and is formed by connecting through cables, the electronic information devices are generally influenced by the field environment and the voltage and current injected into a port, under the condition, the conditions such as device function damage or performance degradation and the like are judged to be more consistent with the actual conditions by using the effect experiment result (damage criterion) obtained by the characterization method, and the electromagnetic vulnerability assessment result of the system is more reasonable and credible.
Description
Technical Field
The invention relates to an electromagnetic pulse experiment technology, in particular to a device electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment.
Background
In a distributed system including a plurality of electronic information devices connected by cables, the electronic information devices may be damaged or degraded in function under a strong electromagnetic environment in space, thereby affecting the overall performance or function of the system. The naturally generated thunder and lightning, high-altitude nuclear explosion, electromagnetic pulse weapons and the like can generate strong electromagnetic pulse environments. In order to understand and grasp the functional damage or performance degradation condition of a certain system in the strong electromagnetic pulse environment, the electromagnetic vulnerability assessment of the system needs to be carried out, namely, the functional relation of the damage condition (or the ability to resist the electromagnetic pulse) of the system with the change of the environmental parameters of the electromagnetic pulse is determined. For a large complex system composed of a plurality of electronic information devices, the vulnerability of the system cannot be directly given through an electromagnetic environment effect test, and the electromagnetic vulnerability of the system is usually obtained by mastering the data of the system hierarchical relationship, the relationship between the electromagnetic damage effects of the subsystems and the unit devices and the like and then utilizing a special evaluation method.
In practical evaluation, the electromagnetic damage effect condition of the unit equipment is generally obtained by comparing the parameter calculation result of the environment where the equipment is located with the environmental effect test data of the equipment. At present, in an environmental effect test of a device, the characterization of the electromagnetic damage effect of the device includes: A. representing the equipment damage under the field radiation effect, namely giving a relation between environmental field parameters and the equipment damage; B. and (3) device damage characterization under the port injection effect, namely giving a relation between the device port injection voltage and current and the device damage. In the characterization method, the two electromagnetic damage effects are respectively and independently established, and the obvious defects exist in the evaluation of a large-scale complex system, namely, under the actual electromagnetic environment, the equipment is often subjected to the electromagnetic field irradiation and the port coupling voltage current at the same time, the damage of the equipment is the result of the combined action of the electromagnetic field irradiation and the port coupling voltage current, the electromagnetic damage effect test result of the equipment serving as the damage criterion is the result of the independent radiation field or the injected voltage current, the electromagnetic effect test condition of the equipment is inconsistent with the actual environment condition in the evaluation of the electromagnetic vulnerability of the equipment, and the error of the judgment of the equipment damage is inevitably caused, so the electromagnetic vulnerability evaluation result of the system is influenced.
Disclosure of Invention
In order to solve the defects in the background art, the invention aims to provide a device electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment, which is characterized in that on the basis of the current single effect expression mainly based on a field radiation effect or a port injection effect and the like, the expression of the device electromagnetic damage effect is increased when a radiation field and a port act together; in a distributed system which comprises a plurality of electronic information devices and is formed by connecting through cables, the electronic information devices are generally influenced by the field environment and the voltage and current injected into a port, under the condition, the conditions such as device function damage or performance degradation and the like are judged to be more consistent with the actual conditions by using the effect experiment result (damage criterion) obtained by the characterization method, and the electromagnetic vulnerability assessment result of the system is more reasonable and credible.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment comprises the following steps:
step S1, determining the device composition and determining the connection port type of the device connected with the outside, wherein the connection port type comprises a signal (weak current) port and a power supply (strong current) port; dividing the performance state of the equipment into three levels, wherein the first level is disturbance, the second level is interference, and the third level is damage;
step S2, measuring external condition parameters of the device when the first-stage performance state appears in different tests, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current; the determination method comprises the following steps:
s2.1, loading a radiation field under the condition that the equipment connecting port is disconnected from the outside, carrying out an irradiation test until the equipment has a performance state of a corresponding grade, and recording the minimum field intensity for enabling the equipment to have the performance state of the grade;
s2.2, under the condition that the equipment is connected with the outside only by using a signal (weak current) port, loading voltage on the signal port of the equipment, carrying out a voltage injection test until the equipment has a performance state of a corresponding level, and recording the minimum voltage for enabling the equipment to have the performance state of the level;
s2.3, loading current to the power supply port of the equipment under the condition that the equipment is connected with the outside only by using the power supply (strong current) port, carrying out a current injection test until the equipment has a performance state of a corresponding grade, and recording the minimum current for enabling the equipment to have the performance state of the grade;
s2.4, under the condition that the equipment is connected with the outside only by using the signal port, loading voltage on the signal port of the equipment, carrying out a voltage injection test, loading a radiation field at the same time, carrying out an irradiation test until the equipment has a performance state of a corresponding level, and recording the minimum voltage and the minimum field intensity which enable the equipment to have the performance state of the level;
s2.5, under the condition that the equipment is connected with the outside only by using the power port, loading current to the power port of the equipment, carrying out a current injection test, loading a radiation field at the same time, carrying out an irradiation test until the equipment has a performance state of a corresponding level, and recording the minimum current and the minimum field strength which enable the equipment to have the performance state of the level;
s2.6, under the condition that the signal port and the power port of the equipment are both connected with the outside, loading voltage on the signal port of the equipment, carrying out a voltage injection test, loading current on the power port, carrying out a current injection test until the equipment has a performance state of a corresponding level, and recording the minimum voltage and the minimum current which enable the equipment to have the performance state of the level;
s2.7, loading a radiation field to perform an irradiation test under the condition that a signal port and a power port of the equipment are both connected with the outside, simultaneously performing a voltage injection test on a loading voltage of the signal port of the equipment and a current injection test on a loading current of the power port of the equipment until the equipment has a performance state of a corresponding grade, and recording the minimum field intensity, the minimum voltage and the minimum current which enable the equipment to have the performance state of the grade;
step S3, repeating step S2.1-step S2.7, and in different tests, determining external condition parameters when the equipment is in a second-stage performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
step S4, repeating the step S2.1 to the step S2.7, and under different tests, determining external condition parameters when the equipment is in a third-level performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
and step S5, establishing the electromagnetic vulnerability representation of the equipment according to the grade of the equipment performance state and the measured external condition parameters in the steps S2 to S4.
In the step S2 to the step S4, on the premise that the radiation field of the irradiation test maintains a specific waveform, the peak value of the field strength starts from zero or a specific value, and is increased according to a certain step length until the device is in a performance state of a corresponding level; the loading voltage of the voltage injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade; the loading current of the current injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade.
In step S1, the levels of the device performance status are divided according to the following features:
the first level is interference, which corresponds to the following: when the electromagnetic pulse acts on the equipment, the function of the equipment is degraded, and after the electromagnetic pulse acts on the equipment, the equipment is recovered to be normal;
the second level is a scrambling, which corresponds to the following: when the electromagnetic pulse acts, the equipment is deadlocked and invalid, the equipment is interrupted or restarted without manual intervention, and after the electromagnetic pulse acts, the equipment is recovered to be normal;
the third level is damage, and the corresponding things are: when the electromagnetic pulse acts on the equipment, the equipment cannot be normally used, and after the electromagnetic pulse acts on the equipment, the equipment can normally work only after manual intervention, or the equipment cannot restore to normally work after the manual intervention.
The invention has the beneficial effects that: the characterization method provided by the invention respectively gives the relationship between the environmental field parameters and the equipment damage, the relationship between the equipment port injection voltage and current and the equipment damage, and the relationship between the environmental field parameters and the equipment port injection voltage and current and the equipment damage under the simultaneous action of the environmental field parameters and the equipment port injection voltage and current, so that the electromagnetic vulnerability assessment requirement of a large-scale complex system can be met, and the assessment result is more reasonable and credible.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a flow chart of the present invention for determining external condition parameters.
FIG. 3 is a schematic representation of the characterization method of example 1.
In fig. 3, N indicates that the parameter value is zero, and the remaining letter and number combinations each represent a specific parameter value.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The method for representing the electromagnetic damage of the equipment, which is suitable for evaluating the electromagnetic vulnerability of the system, can be adopted for evaluating the electromagnetic vulnerability of the existing computer.
The technical scheme is as follows:
the method for characterizing the electromagnetic damage of the computer equipment is shown in FIG. 1 and comprises the following steps:
step S1, determining the composition of the computer, the computer is composed of a host, a display, a keyboard and a wire mouse, and determining the connection port type of the computer connected with the outside, the connection port type includes a signal (weak current) port and a power supply (strong current) port, the computer has a network port and a power supply port; the performance state of the computer is divided into three levels, wherein the first level is disturbance, the second level is interference, and the third level is damage;
step S2, measuring external condition parameters of the computer when the first-stage performance state appears in different tests, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current; the measurement method is shown in FIG. 2 and comprises the following steps:
s2.1, loading a radiation field under the condition that a network port and a power supply port of the computer are disconnected with the outside, carrying out an irradiation test until the computer has a performance state of a corresponding grade, and recording the minimum field intensity for enabling the computer to have the performance state of the grade;
s2.2, under the condition that the computer is connected with the outside only by using the network port, loading voltage on the network port of the computer, carrying out a voltage injection test until the computer has a performance state of a corresponding level, and recording the minimum voltage for enabling the computer to have the performance state of the level;
s2.3, under the condition that the computer is connected with the outside only by using the power port, loading current to the power port of the computer, carrying out a current injection test until the computer has a performance state of a corresponding level, and recording the minimum current for enabling the computer to have the performance state of the level;
s2.4, under the condition that the computer is connected with the outside only by using the network port, loading voltage on the network port of the computer, carrying out a voltage injection test, loading a radiation field at the same time, carrying out an irradiation test until the computer has a performance state of a corresponding grade, and recording the minimum voltage and the minimum field strength which enable the computer to have the performance state of the grade;
s2.5, under the condition that the computer is connected with the outside only by using the power port, loading current to the power port of the computer, carrying out a current injection test, loading a radiation field at the same time, carrying out an irradiation test until the computer has a performance state of a corresponding grade, and recording the minimum current and the minimum field strength which enable the computer to have the performance state of the grade;
s2.6, under the condition that the network port and the power port of the computer are both connected with the outside, loading voltage on the signal port of the computer, carrying out a voltage injection test, loading current on the power port, carrying out a current injection test until the computer has a performance state of a corresponding level, and recording the minimum voltage and the minimum current which enable the computer to have the performance state of the level;
s2.7, loading a radiation field to perform an irradiation test under the condition that the network port and the power port of the computer are both connected with the outside, simultaneously performing a voltage injection test on the network port loading voltage of the computer and performing a current injection test on the power port loading current until the computer has a performance state of a corresponding grade, and recording the minimum field intensity, the minimum voltage and the minimum current which enable the computer to have the performance state of the grade;
step S3, repeating step S2.1-step S2.7, in different tests, measuring external condition parameters when the computer is in the second-stage performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
step S4, repeating step S2.1-step S2.7, and under different tests, determining external condition parameters when the computer is in a third-level performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
step S5, establishing an electromagnetic vulnerability representation of the computer according to the grade of the computer performance status and the measured external condition parameters in the steps S2 to S4, as shown in fig. 3.
In the step S2 to the step S4, on the premise that the radiation field of the irradiation test maintains a specific waveform, the peak value of the field strength starts from zero or a specific value, and is increased according to a certain step length until the device is in a performance state of a corresponding level; the loading voltage of the voltage injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade; the loading current of the current injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade.
In step S1, the levels of the device performance status are divided according to the following features:
the first level is interference, which corresponds to the following: when the electromagnetic pulse acts on the equipment, the function of the equipment is degraded, and after the electromagnetic pulse acts on the equipment, the equipment is recovered to be normal;
the second level is a scrambling, which corresponds to the following: when the electromagnetic pulse acts, the equipment is deadlocked and invalid, the equipment is interrupted or restarted without manual intervention, and after the electromagnetic pulse acts, the equipment is recovered to be normal;
the third level is damage, and the corresponding things are: when the electromagnetic pulse acts on the equipment, the equipment cannot be normally used, and after the electromagnetic pulse acts on the equipment, the equipment can normally work only after manual intervention, or the equipment cannot restore to normally work after the manual intervention.
In summary, the characterization method provided by the present invention is not only suitable for describing the characteristics of device function damage or performance degradation when the radiation field or the port voltage and current act on the device alone, but also suitable for describing the characteristics of device function damage or performance degradation when the radiation field parameter and the port parameter act on the device simultaneously. In a distributed system which comprises a plurality of electronic information devices and is formed by connecting through cables, the electronic information devices are generally influenced by the field environment and the voltage and current injected into a port at the same time, under the condition, when the electromagnetic vulnerability of the system is evaluated, the conditions of equipment function damage or performance degradation and the like are judged by using an effect experimental result (damage criterion) obtained by the characterization method, so that the system is more consistent with the actual condition, and the evaluation result of the electromagnetic vulnerability of the system is more reasonable and credible.
The present invention is not described in detail in the prior art.
Claims (2)
1. A device electromagnetic damage characterization method suitable for system electromagnetic vulnerability assessment is characterized by comprising the following steps: the method comprises the following steps:
step S1, determining the device composition and determining the connection port type of the device connected with the outside, wherein the connection port type comprises a signal (weak current) port and a power supply (strong current) port; dividing the performance state of the equipment into three levels, wherein the first level is disturbance, the second level is interference, and the third level is damage;
step S2, measuring external condition parameters of the device when the first-stage performance state appears in different tests, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current; the determination method comprises the following steps:
s2.1, loading a radiation field under the condition that the equipment connecting port is disconnected from the outside, carrying out an irradiation test until the equipment has a performance state of a corresponding grade, and recording the minimum field intensity for enabling the equipment to have the performance state of the grade;
s2.2, under the condition that the equipment is connected with the outside only by using a signal (weak current) port, loading voltage on the signal port of the equipment, carrying out a voltage injection test until the equipment has a performance state of a corresponding level, and recording the minimum voltage for enabling the equipment to have the performance state of the level;
s2.3, loading current to the power supply port of the equipment under the condition that the equipment is connected with the outside only by using the power supply (strong current) port, carrying out a current injection test until the equipment has a performance state of a corresponding grade, and recording the minimum current for enabling the equipment to have the performance state of the grade;
s2.4, under the condition that the equipment is connected with the outside only by using the signal port, loading voltage on the signal port of the equipment, carrying out a voltage injection test, loading a radiation field at the same time, carrying out an irradiation test until the equipment has a performance state of a corresponding level, and recording the minimum voltage and the minimum field intensity which enable the equipment to have the performance state of the level;
s2.5, under the condition that the equipment is connected with the outside only by using the power port, loading current to the power port of the equipment, carrying out a current injection test, loading a radiation field at the same time, carrying out an irradiation test until the equipment has a performance state of a corresponding level, and recording the minimum current and the minimum field strength which enable the equipment to have the performance state of the level;
s2.6, under the condition that the signal port and the power port of the equipment are both connected with the outside, loading voltage on the signal port of the equipment, carrying out a voltage injection test, loading current on the power port, carrying out a current injection test until the equipment has a performance state of a corresponding level, and recording the minimum voltage and the minimum current which enable the equipment to have the performance state of the level;
s2.7, loading a radiation field to perform an irradiation test under the condition that a signal port and a power port of the equipment are both connected with the outside, simultaneously performing a voltage injection test on a loading voltage of the signal port of the equipment and a current injection test on a loading current of the power port of the equipment until the equipment has a performance state of a corresponding grade, and recording the minimum field intensity, the minimum voltage and the minimum current which enable the equipment to have the performance state of the grade;
step S3, repeating step S2.1-step S2.7, and in different tests, determining external condition parameters when the equipment is in a second-stage performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
step S4, repeating the step S2.1 to the step S2.7, and under different tests, determining external condition parameters when the equipment is in a third-level performance state, wherein the external condition parameters comprise minimum field intensity, minimum voltage and minimum current;
and step S5, establishing the electromagnetic vulnerability representation of the equipment according to the grade of the equipment performance state and the measured external condition parameters in the steps S2 to S4.
2. The method for characterizing electromagnetic damage of equipment, according to claim 1, is adapted for system electromagnetic vulnerability assessment, wherein: in the step S2 to step S4, on the premise that the radiation field of the irradiation test maintains a specific waveform, the peak value of the field strength starts from zero or a specific value, and increases according to a certain step length until the performance state of the equipment at a corresponding level appears, and then stops; the loading voltage of the voltage injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade; the loading current of the current injection test is increased from zero or a certain specific value according to a certain step length until the equipment is in a performance state of a corresponding grade, and then the method is stopped:
in step S1, the levels of the device performance status are divided according to the following features:
the first level is interference, which corresponds to the following: when the electromagnetic pulse acts on the equipment, the function of the equipment is degraded, and after the electromagnetic pulse acts on the equipment, the equipment is recovered to be normal;
the second level is a scrambling, which corresponds to the following: when the electromagnetic pulse acts, the equipment is deadlocked and invalid, the equipment is interrupted or restarted without manual intervention, and after the electromagnetic pulse acts, the equipment is recovered to be normal;
the third level is damage, and the corresponding things are: when the electromagnetic pulse acts on the equipment, the equipment cannot be normally used, and after the electromagnetic pulse acts on the equipment, the equipment can normally work only after manual intervention, or the equipment cannot restore to normally work after the manual intervention.
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