Simulation method and device for lightning transient induction sensitivity of cable and medium

Abstract

The invention discloses a simulation method and device for cable lightning transient induction sensitivity and a medium. The method comprises the steps that a target cable is placed in a preset calibration three-dimensional model; preset ideal excitation is added to a port of the calibration three-dimensional model, energy is coupled to a shielding layer of the target cable through the electromagnetic induction effect, and calibration excitation is obtained; actual interference excitation is calculated according to the ideal excitation and the calibration excitation; and performing lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain a current evaluation result of interference coupling of the target cable. According to the simulation method and device for the lightning transient induction sensitivity of the cable and the medium, lightning transient sensitivity simulation is carried out on the target cable through actual interference excitation, and the experiment time is shortened; meanwhile, the simulation method can avoid risks and uncertainty possibly occurring in the experiment process, and the problem that it is difficult to accurately simulate and evaluate the lightning transient sensitivity of the cable can be solved.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering, and in particular to a simulation method, device and medium for lightning transient induction sensitivity of cables. Background Art

[0002] Lightning is the most common discharge phenomenon, and the complex electromagnetic environment it generates has a significant impact on the safe operation of aircraft. When lightning discharges, the transient electromagnetic field it generates will directly cause physical damage such as breakdown of the aircraft surface and deformation of the skin structure through the corresponding coupling path, or indirectly cause electronic interference and threats to the equipment and cables inside the aircraft. As an important key component of the avionics system, the lightning-induced transient sensitivity of airborne cables is an important constraint on aircraft safety. In order to reduce the hazards of indirect effects of lightning on cables, traditional evaluation methods rely on lightning simulation tests. Existing simulations mainly simulate lightning pulses by directly irradiating cables, and simulate transient electromagnetic fields based on high peak current and fast rise time, which can intuitively reflect the transient response of cables under lightning pulses.

[0003] However, traditional methods require the construction of complex test facilities, the purchase of expensive test equipment, and the consumption of a large amount of test materials, which will not only significantly increase the evaluation cost, but may also weaken the accuracy and reliability of the results. In addition, because airborne cables are usually not directly subjected to lightning interference, but are induced by lightning currents through complex coupling paths; therefore, simulating lightning effects only by direct irradiation may not be able to fully and accurately reflect the transient induction sensitivity of cables in actual lightning environments. Summary of the invention

[0004] The present invention provides a method, a device and a medium for simulating the lightning transient induction sensitivity of a cable, so as to solve the problem that it is difficult to accurately simulate and evaluate the lightning transient sensitivity of a cable.

[0005] Place the target cable in a preset calibration 3D model;

[0006] Adding a preset ideal excitation to the port of the calibration three-dimensional model, and coupling energy to the shielding layer of the target cable through electromagnetic induction to obtain a calibration excitation;

[0007] Calculate the actual interference excitation according to the ideal excitation and the calibration excitation;

[0008] A lightning transient sensitivity simulation is performed on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

[0009] The present invention adds a preset ideal excitation to the port of the calibration three-dimensional model, and couples energy to the shielding layer of the target cable through electromagnetic induction. This step simulates the induction effect of the lightning transient electromagnetic field on the cable, and this simulation method takes into account the material properties of the cable and the electromagnetic characteristics of the surrounding environment, so that it can more accurately reflect the real response of the cable in the lightning environment. The actual interference excitation is calculated based on the ideal excitation and the calibration excitation. It takes into account the electromagnetic response characteristics of the cable in a specific environment. Therefore, the actual interference excitation is more reliable than the idealized excitation form of the ideal excitation and the simulated excitation form of the calibration excitation. By calculating the actual interference excitation and simulating it, the error caused by directly irradiating the cable with lightning pulses can be avoided, and the accuracy of the current evaluation results can be guaranteed.

[0010] Compared with the prior art, the present invention simulates the lightning transient sensitivity of the target cable through actual interference excitation, without the need to build complex experimental equipment and measurement systems, thus reducing experimental costs and time; at the same time, the simulation method can also avoid the risks and uncertainties that may arise during the experiment, thus solving the problem of difficulty in accurately simulating and evaluating the lightning transient sensitivity of the cable.

[0011] As a preferred solution, the calibrated three-dimensional model is specifically:

[0012] According to the parameterization principle, a three-dimensional model is performed by defining several structural parameters of the target cable to obtain a three-dimensional model of the airborne cable and the evaluation environment;

[0013] According to the lightning current waveform coupling principle, the coupling transformer is modeled in a three-dimensional environment to obtain a coupling transformer model;

[0014] The calibration three-dimensional model is established according to the airborne cable and evaluation environment three-dimensional model and the coupling transformer model.

[0015] Compared with the traditional manual modeling method, the parametric modeling of this preferred solution reduces the possibility of human error; by automatically generating the model, it can be ensured that each modified model is based on the same parameter set, thereby improving the reliability and consistency of the model. According to the principle of lightning current waveform coupling, the coupling transformer is modeled in a three-dimensional environment to obtain an accurate coupling transformer model, which is helpful for analyzing the propagation and coupling process of lightning current in the coupling transformer.

[0016] As a preferred solution, a preset ideal excitation is added to the port of the calibration three-dimensional model, and energy is coupled to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation, specifically:

[0017] In the calibration three-dimensional model, establishing an excitation port at a coaxial connector of the coupling transformer model;

[0018] Adding the ideal excitation to the excitation port, and coupling energy to the shielding layer of the target cable through electromagnetic induction to obtain a cable shielding layer current;

[0019] An excitation current or voltage value corresponding to the ideal excitation is extracted from the cable shielding layer current to obtain the calibration excitation.

[0020] This preferred solution can accurately simulate the actual excitation process by establishing an excitation port at the coaxial connector of the coupling transformer model and adding an ideal excitation, which helps to ensure the accuracy and reliability of the calibration results. The excitation energy is coupled to the shielding layer of the target cable through electromagnetic induction, so that the current on the shielding layer can be accurately measured to ensure the accuracy of the calibration excitation.

[0021] As a preferred solution, the ideal excitation is added to the excitation port, and the energy is coupled to the shielding layer of the target cable through electromagnetic induction to obtain the cable shielding layer current, specifically:

[0022] Adding the ideal excitation to the excitation port, controlling the ideal excitation to generate a corresponding electromagnetic field within a target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model;

[0023] The coupling transformer model is controlled to couple the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction, so as to obtain the shielding layer current of the cable.

[0024] This preferred solution couples the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction. This process has a high energy transfer efficiency. Compared with other energy transfer methods, electromagnetic induction can reduce energy loss during the transfer process, thereby ensuring that the target cable can obtain sufficient energy to generate significant shielding layer current.

[0025] As a preferred solution, the actual interference excitation is calculated according to the ideal excitation and the calibration excitation, specifically:

[0026] Obtaining an ideal excitation peak time and an ideal excitation half peak time from the current time domain waveform of the ideal excitation;

[0027] Acquire the calibration excitation peak time and the calibration excitation half peak time from the current time domain waveform of the calibration excitation;

[0028] If the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time meet a preset error standard, the calibration excitation is defined as the actual interference excitation;

[0029] If the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the error standard, an uncertainty influencing factor is introduced, and the actual interference excitation is calculated based on the ideal excitation.

[0030] This preferred solution compares the peak time and half-peak time of the ideal excitation and the calibration excitation, which can ensure the accuracy and reliability of the calibration process. If the difference between the time parameters is within the error standard range, the calibration excitation can be regarded as the actual interference excitation, thereby improving the accuracy of the calibration. When the parameters do not meet the error standard, the uncertainty influence factor is introduced to calculate the actual interference excitation. This method takes into account the influence of factors such as measurement error and system error on the calibration result, thereby enhancing the reliability of the calibration result.

[0031] As a preferred solution, lightning transient sensitivity simulation is performed on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling, specifically:

[0032] Establishing a two-dimensional circuit simulation model of cable lightning transient sensitivity based on the three-dimensional model of the airborne cable and the evaluation environment;

[0033] The actual interference excitation is added at the cable shielding layer connection port of the two-dimensional circuit simulation model, and the lightning transient sensitivity simulation of the target cable is performed according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

[0034] This preferred solution can preserve key structural and parameter information by converting the three-dimensional model of the airborne cable and the evaluation environment into a two-dimensional circuit simulation model, thereby ensuring the accuracy of the simulation. In the two-dimensional circuit simulation model, by adding actual interference excitation, the changes in current, voltage and other parameters during the lightning transient process can be accurately simulated, which helps to evaluate the transient response and sensitivity of the target cable in a lightning environment.

[0035] The present application also provides a simulation device for cable lightning transient induction sensitivity, including an adjustment module, an excitation module, a calibration module and an evaluation module;

[0036] Wherein, the adjustment module is used to place the target cable in a preset calibration three-dimensional model;

[0037] The excitation module is used to add a preset ideal excitation to the port of the calibration three-dimensional model, and couple energy to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation;

[0038] The calibration module is used to calculate the actual interference excitation according to the ideal excitation and the calibration excitation;

[0039] The evaluation module is used to perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

[0040] As a preferred solution, the calibrated three-dimensional model is specifically:

[0041] According to the parameterization principle, a three-dimensional model is performed by defining several structural parameters of the target cable to obtain a three-dimensional model of the airborne cable and the evaluation environment;

[0042] According to the lightning current waveform coupling principle, the coupling transformer is modeled in a three-dimensional environment to obtain a coupling transformer model;

[0043] The calibration three-dimensional model is established according to the airborne cable and evaluation environment three-dimensional model and the coupling transformer model.

[0044] As a preferred solution, the excitation module includes a port unit, a current unit and an excitation unit;

[0045] Wherein, the port unit is used to establish an excitation port at the coaxial connector of the coupling transformer model in the calibration three-dimensional model;

[0046] The current unit is used to add the ideal excitation to the excitation port and couple the energy to the shielding layer of the target cable through electromagnetic induction to obtain the cable shielding layer current;

[0047] The excitation unit is used to extract an excitation current or voltage value corresponding to the ideal excitation from the cable shielding layer current to obtain the calibration excitation.

[0048] As a preferred solution, the current unit includes an electromagnetic subunit and a coupling subunit;

[0049] Wherein, the electromagnetic subunit is used to add the ideal excitation to the excitation port, and control the ideal excitation to generate a corresponding electromagnetic field within the target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model;

[0050] The coupling subunit is used to control the coupling transformer model to couple the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction to obtain the shielding layer current of the cable.

[0051] As a preferred solution, the calibration module includes a first time unit, a second time unit, a first comparison unit and a second comparison unit;

[0052] Wherein, the first time unit is used to obtain the ideal excitation peak time and the ideal excitation half-peak time from the current time domain waveform of the ideal excitation;

[0053] The second time unit is used to obtain the calibration excitation peak time and the calibration excitation half-peak time from the current time domain waveform of the calibration excitation;

[0054] The first comparison unit is configured to define the calibration excitation as the actual interference excitation if a preset error standard is satisfied between the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time;

[0055] The second comparison unit is used to introduce an uncertainty influencing factor if the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the error standard, and calculate the actual interference excitation based on the ideal excitation.

[0056] As a preferred solution, the evaluation module includes a model unit and a simulation unit;

[0057] Wherein, the model unit is used to establish a two-dimensional circuit simulation model of cable lightning transient sensitivity based on the three-dimensional model of the airborne cable and the evaluation environment;

[0058] The simulation unit is used to add the actual interference excitation at the cable shielding layer connection port of the two-dimensional circuit simulation model, and perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

[0059] The present application also provides a storage medium, on which a computer program is stored. The computer program is called and executed by a computer to implement the above-mentioned method for simulating the transient induction sensitivity of a cable lightning.

[0060] Attached photos

[0061] Figure 1 It is a flow chart of a method for simulating the transient induction sensitivity of a cable lightning provided in an embodiment of the present application;

[0062] Figure 2 It is a structural diagram of a three-dimensional model of an airborne cable and an evaluation environment provided in an embodiment of the present application;

[0063] Figure 3 is a three-dimensional structure diagram of a coupling transformer model provided in an embodiment of the present application;

[0064] Figure 4 is a structural diagram of a calibration three-dimensional model provided in an embodiment of the present application;

[0065] Figure 5 is an equivalent two-dimensional circuit diagram of the three-dimensional model provided in the embodiment of the present application;

[0066] Figure 6 is a schematic diagram of a circuit simulation model provided in an embodiment of the present application;

[0067] Figure 7 is a current evaluation result diagram provided in an embodiment of the present application;

[0068] Figure 8 It is a structural schematic diagram of a simulation device for cable lightning transient induction sensitivity provided in an embodiment of the present application. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0070] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "several" means two or more.

[0071] A simulation method for lightning transient induction sensitivity of a cable provided in an embodiment of the present application is mainly used in situations where accurate and reliable simulation evaluation of lightning transient sensitivity of a cable is required during the design phase of an airborne cable.

[0072] Embodiment 1:

[0073] See also Figure 1 The embodiment of the present application provides a method for simulating the lightning transient induction sensitivity of a cable, including S1 to S4, and the specific implementation steps are as follows:

[0074] S1. Place the target cable in a preset calibration 3D model.

[0075] Step S1 of the embodiment of the present application includes S1.1 to S1.3, specifically:

[0076] S1.1. According to the parameterization principle, a series of structural parameters of the target cable are defined, including the diameter A of the cable core, the cable length B, the braiding density C of the cable shielding layer, the thickness D of the insulation layer and the number E of the cores; based on these parameters, three-dimensional modeling is performed to obtain the initial three-dimensional model of the target cable;

[0077] At both ends of the initial three-dimensional model, add core connection ports 2 and 3, and shield connection ports 4 and 5. And follow the lightning induced transient sensitivity test method specified in the RTCA DO-160G standard, introduce elements such as grounding plates, insulation plates and lap strips to build the corresponding evaluation environment; among them, "RTCA DO-160G standard" is an internationally recognized environmental test standard for airborne electronic equipment, and its full name is "Environmental Conditions and Test Procedures for Airborne Equipment";

[0078] The entire boundary of the initial three-dimensional model is set as an absorbing boundary to simulate the environment of the shielding room, and finally a complete three-dimensional model including the airborne cables and their evaluation environment is obtained, that is, a three-dimensional model of the airborne cables and the evaluation environment is obtained.

[0079] To apply the embodiments of this application, please refer to Figure 2 , Figure 2 It is a structural diagram of the three-dimensional model of the airborne cables and evaluation environment provided in an embodiment of the present application, which represents the specific structure of the three-dimensional model of the airborne cables and evaluation environment in this embodiment.

[0080] Compared with the traditional manual modeling method, the parametric modeling of this embodiment S1.1 reduces the possibility of human error, which facilitates better analysis of the lightning transient sensitivity of cables with different parameters in the later stage; by automatically generating models, it can be ensured that each modified model is based on the same set of parameters, thereby improving the reliability and consistency of the model.

[0081] S1.2. Design a coupling transformer that can effectively couple the lightning current waveform specified by the preset standard to the cable based on the principle of lightning current waveform coupling; the coupling transformer is composed of multiple key components, including a metal shielding shell, which is a high-quality electrical conductor; 12 groups of rectangular ferrite cores for providing the necessary magnetic field; and a ring-shaped excitation winding, the material of which is copper to ensure good conductivity.

[0082] Insulating material is used to fill the metal shielding shell and rectangular ferrite core of the coupling transformer to maintain an appropriate gap between the two and ensure electrical isolation. In addition, a coaxial connector is provided for the coupling transformer, which consists of three parts: contact terminal, insulator and shell. Its impedance matching is set to 50 ohms to ensure stable signal transmission.

[0083] Through the precise assembly and configuration of the above components, a coupling transformer model is obtained.

[0084] To apply the embodiments of this application, please refer to Figure 3 , Figure 3 It is a three-dimensional structure diagram of the coupling transformer model provided in an embodiment of the present application, which represents the specific three-dimensional structure of the coupling transformer model in this embodiment.

[0085] In this embodiment S1.2, based on the lightning current waveform coupling principle, the coupling transformer is modeled in a three-dimensional environment, and an accurate coupling transformer model can be obtained, which is helpful for analyzing the propagation and coupling process of the lightning current in the coupling transformer.

[0086] S1.3, establishing a calibration three-dimensional model based on the three-dimensional model of the airborne cable and the evaluation environment and the coupling transformer model;

[0087] Place the target cable in the calibration 3D model. Specifically, import the coupling transformer model into the 3D model of the airborne cable and the evaluation environment, and move the coupling transformer model onto the target cable, ensuring that the target cable is sandwiched in the gap in the coupling transformer model.

[0088] In the calibration three-dimensional model, a calibration excitation current monitoring point is set at the connection port 4 of the cable shield layer to monitor and adjust the magnitude of the excitation current to ensure that it meets the calibration requirements. At the same time, a 50-ohm matching impedance is connected to another connection port 5 of the cable shield layer to ensure stable signal transmission and minimize reflection. In addition, 50-ohm loads are added to the connection ports 2 and 3 of the core respectively, and these loads are grounded to simulate the load conditions in the actual working environment to ensure stable signal transmission.

[0089] To apply the embodiments of this application, please refer to Figure 4-5 , Figure 4 is a structural diagram of a calibration three-dimensional model provided in an embodiment of the present application, which shows the placement of a target cable in the calibration three-dimensional model in this embodiment, as well as the specific structure of the calibration three-dimensional model;

[0090] Figure 5It is an equivalent two-dimensional circuit diagram of the three-dimensional model provided in the embodiment of the present application, which represents the equivalent two-dimensional circuit diagram after the excitation current monitoring point setting, matching impedance connection, load addition and grounding adjustment of the calibrated three-dimensional model.

[0091] S2. Add a preset ideal excitation to the port of the calibration three-dimensional model, and couple the energy to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation.

[0092] Step S2 of the embodiment of the present application is specifically as follows:

[0093] In the calibration three-dimensional model, an excitation port is established at the coaxial connector of the coupling transformer model;

[0094] Add ideal excitation I1 to the excitation port, and control the ideal excitation I1 to generate a corresponding electromagnetic field within the target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model; ideal excitation refers to an excitation waveform curve constructed based on precise data formulas and models during the simulation process, which completely excludes interference from factors such as actual device characteristics, signal interference, noise pollution, and nonlinear distortion; and this waveform model is a mathematical idealization, showing a continuous, pure, and perfect curve without any distortion;

[0095] The control coupling transformer model couples the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction, and obtains the cable shielding layer current; wherein, the cable shielding layer current is the induced current generated on the cable shielding layer after the ideal excitation I1 passes through the coupling transformer.

[0096] The excitation current or voltage value corresponding to the ideal excitation I1 is extracted from the cable shield current to obtain the calibrated excitation I2.

[0097] It should be noted that in simulation, ideal excitation is often added directly. Ideal excitation does not take into account the uncertainty impact of instruments and equipment in actual tests on the evaluation results. When simulation evaluation is performed according to this excitation, the result is quite different from the actual result. Therefore, it is necessary to establish a mathematical model of uncertainty to calibrate the ideal excitation. In the simulation method of this embodiment, the main simulation instrument is a coupling transformer. Therefore, when the calibration excitation I2 does not meet the preset error condition, it is necessary to calculate the influence factor K of the uncertainty of the coupling transformer through a mathematical model to enhance the reliability of the calibration result and further ensure the usefulness of the actual interference excitation I3.

[0098] In this embodiment S2, by establishing an excitation port at the coaxial connector of the coupling transformer model and adding an ideal excitation, the actual excitation process can be accurately simulated, which helps to ensure the accuracy and reliability of the calibration results. The excitation energy is coupled to the shielding layer of the target cable through electromagnetic induction, so that the current on the shielding layer can be accurately measured, ensuring the accuracy of the calibration excitation;

[0099] Moreover, the energy of the electromagnetic field is coupled to the shielding layer of the target cable through electromagnetic induction. This process has a higher energy transfer efficiency. Compared with other energy transfer methods, electromagnetic induction can reduce the loss of energy during the transfer process, thus ensuring that the target cable can obtain enough energy to generate significant shielding layer current.

[0100] S3. Calculate the actual interference excitation based on the ideal excitation and the calibrated excitation.

[0101] Step S3 of the embodiment of the present application is specifically as follows:

[0102] Get the ideal excitation peak time T from the current time domain waveform of the ideal excitation I1 理想激励峰值时间 and ideal excitation half peak time T 理想激励半峰值时间 ;

[0103] Get the calibration excitation peak time T from the current time domain waveform of the calibration excitation I2 校准激励峰值时间 and calibration excitation half peak time T 校准激励半峰值时间 ;

[0104] If the ideal excitation peak time T 理想激励峰值时间 and T 校准激励峰值时间 Between satisfying "T 校准激励峰值时间 =T 理想激励峰值时间 ±20%”, and the ideal excitation half peak time T 理想激励半峰值时间 and calibration excitation half peak time T 校准激励半峰值时间 Between satisfying "T 校准激励半峰值时间 =T 理想激励半峰值时间 ±20%”, the calibration excitation I2 is defined as the actual interference excitation I3.

[0105] If the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the above error standards, the uncertainty influencing factor K is introduced, and the actual interference excitation I3 is calculated based on the ideal excitation; wherein the actual interference excitation I3 = ideal excitation I1 (1 + K);

[0106] Among them, the uncertainty influence factor K is:

[0107]

[0108] In this embodiment S3, the peak time and half peak time of the ideal excitation and the calibration excitation are compared to ensure the accuracy and reliability of the calibration process. If the difference between the time parameters is within the error standard range, the calibration excitation can be regarded as the actual interference excitation, thereby improving the accuracy of the calibration. When the parameters do not meet the error standard, the uncertainty influence factor is introduced to calculate the actual interference excitation. This method takes into account the influence of factors such as measurement error and system error on the calibration result, thereby enhancing the reliability of the calibration result.

[0109] S4. Perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain the current evaluation result of the target cable being subjected to interference coupling.

[0110] Step S4 of the embodiment of the present application is specifically as follows:

[0111] A two-dimensional equivalent SPICE circuit model is established based on the three-dimensional model of the airborne cable and the evaluation environment, and a two-dimensional circuit simulation model of the cable lightning transient sensitivity is obtained. The actual interference excitation I3 is introduced at the connection port 4 of the cable shielding layer to simulate the electromagnetic interference in the real environment. At the same time, a 50-ohm matching impedance is connected to another connection port 5 of the cable shielding layer and grounded to ensure stable signal transmission and reduce reflection. In addition, in order to monitor the cable coupling current, a coupling current monitoring point is added to the connection port 2 of the core; and a 50-ohm load is connected to another connection port 3 of the core and grounded to simulate the load conditions in the actual working environment.

[0112] The target cable is simulated for lightning transient sensitivity according to the actual interference excitation I3 to obtain the current evaluation result of the target cable affected by interference coupling. Moreover, according to the current evaluation result generated by the interference coupling, the sensitivity of the target cable to lightning transient can be measured, and the protection design of the cable can be optimized accordingly.

[0113] To apply the embodiments of this application, please refer to Figure 6-7 ;

[0114] Figure 6 Schematic diagram of a circuit simulation model provided in an embodiment of the present application, showing the wiring conditions of a simulated three-dimensional model corresponding to a two-dimensional circuit simulation model in this embodiment; Figure 6 As shown, the simulation three-dimensional model module stores the field information calculated by the three-dimensional structure model, that is, the SPICE circuit contains the field information of the three-dimensional structure model.

[0115] Figure 7 is a current evaluation result diagram provided in an embodiment of the present application, which shows an example of a current evaluation result obtained when a target cable is subjected to interference coupling in the present embodiment;

[0116] like Figure 7 As shown in the figure, the horizontal direction (horizontal axis) represents time in microseconds (us), and the vertical direction (vertical axis) represents the magnitude of the current in amperes (A); this figure is used to show the change of the current passing through the target cable over time in a certain period of time. Through this figure, you can intuitively see the fluctuation of the current over time, including the magnitude of the current, the trend of change, and whether there is abnormal current. This has important reference value for evaluating the lightning transient sensitivity of the target cable.

[0117] In this embodiment S4, by converting the three-dimensional model of the airborne cable and the evaluation environment into a two-dimensional circuit simulation model, key structural and parameter information can be retained, thereby ensuring the accuracy of the simulation. In the two-dimensional circuit simulation model, by adding actual interference excitation, the changes in parameters such as current and voltage during the lightning transient process can be accurately simulated, which is helpful for evaluating the transient response and sensitivity of the target cable in the lightning environment.

[0118] Overall, this embodiment has the following beneficial effects:

[0119] This application adds a preset ideal excitation to the port of the calibration three-dimensional model, and couples energy to the shielding layer of the target cable through electromagnetic induction. This step simulates the induction effect of the lightning transient electromagnetic field on the cable, and this simulation method takes into account the material properties of the cable and the electromagnetic characteristics of the surrounding environment, so that it can more accurately reflect the actual response of the cable in a lightning environment. The actual interference excitation is calculated based on the ideal excitation and the calibration excitation. It takes into account the electromagnetic response characteristics of the cable in a specific environment. Therefore, the actual interference excitation is more reliable than the idealized excitation form of ideal excitation and the simulated excitation form of calibration excitation. By calculating the actual interference excitation and simulating it, the errors caused by directly irradiating the cable with lightning pulses can be avoided, ensuring the accuracy of the current evaluation results.

[0120] In summary, the present application demonstrates a high degree of reusability and accuracy, and can pre-evaluate the lightning transient sensitivity items of airborne cables during the airborne cable design phase, which can save a lot of subsequent investigation and rectification time and R&D costs, and greatly improve the R&D efficiency of the cables.

[0121] Embodiment 2:

[0122] See also Figure 8 , an embodiment of the present application provides a simulation device for cable lightning transient induction sensitivity, including an adjustment module 10, an excitation module 20, a calibration module 30 and an evaluation module 40;

[0123] Wherein, the adjustment module 10 is used to place the target cable in a preset calibration three-dimensional model;

[0124] The excitation module 20 is used to add a preset ideal excitation to the port of the calibration three-dimensional model, and couple the energy to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation;

[0125] A calibration module 30, configured to calculate an actual interference excitation according to an ideal excitation and a calibration excitation;

[0126] The evaluation module 40 is used to perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation, and obtain a current evaluation result of the target cable being subjected to interference coupling.

[0127] In one embodiment, the adjustment module 10 includes a first model unit, a second model unit, and an implementation unit;

[0128] The first model unit is used to define a series of structural parameters of the target cable according to the parameterization principle, including the diameter A of the cable core, the cable length B, the braiding density C of the cable shielding layer, the thickness D of the insulation layer and the number E of the cores; based on these parameters, three-dimensional modeling is performed to obtain an initial three-dimensional model of the target cable;

[0129] The first model unit is also used to add core connection ports 2 and 3, and shield connection ports 4 and 5 at both ends of the initial three-dimensional model. And follow the lightning induced transient sensitivity test method specified in the RTCADO-160G standard, introduce elements such as grounding plates, insulating plates and lap strips to build the corresponding evaluation environment; among them, the "RTCADO-160G standard" is an internationally recognized environmental test standard for airborne electronic equipment, and its full name is "Environmental Conditions and Test Procedures for Airborne Equipment";

[0130] The first model unit is also used to set the entire boundary of the initial three-dimensional model as an absorbing boundary to simulate the environment of the shielding room, and finally obtain a complete three-dimensional model including the airborne cable and its evaluation environment, that is, obtain an airborne cable and evaluation environment three-dimensional model.

[0131] To apply the embodiments of this application, please refer to Figure 2 , Figure 2 It is a structural diagram of the three-dimensional model of the airborne cables and evaluation environment provided in an embodiment of the present application, which represents the specific structure of the three-dimensional model of the airborne cables and evaluation environment in this embodiment.

[0132] Compared with the traditional manual modeling method, the parametric modeling of the first model unit of this embodiment reduces the possibility of human error, which facilitates better analysis of the lightning transient sensitivity of cables with different parameters in the later stage; by automatically generating models, it can be ensured that each modified model is based on the same set of parameters, thereby improving the reliability and consistency of the model.

[0133] The second model unit is used to design a coupling transformer, which can effectively couple the lightning current waveform specified by the preset standard to the cable based on the principle of lightning current waveform coupling. The coupling transformer is composed of multiple key components, including a metal shielding shell, which is a high-quality electrical conductor; 12 groups of rectangular ferrite cores for providing the necessary magnetic field; and a ring-shaped excitation winding, whose material is copper to ensure good conductivity.

[0134] The second model unit is also used to fill the metal shielding shell and the rectangular ferrite core of the coupling transformer with insulating material to maintain an appropriate gap between the two and ensure electrical isolation. In addition, the coupling transformer is equipped with a coaxial connector, which consists of three parts: a contact terminal, an insulator, and a shell, and its impedance matching is set to 50 ohms to ensure stable signal transmission.

[0135] The second model unit is also used to obtain a coupling transformer model by accurately assembling and configuring the above components.

[0136] To apply the embodiments of this application, please refer to Figure 3 , Figure 3 It is a three-dimensional structure diagram of the coupling transformer model provided in an embodiment of the present application, which represents the specific three-dimensional structure of the coupling transformer model in this embodiment.

[0137] The second model unit of this embodiment models the coupling transformer in a three-dimensional environment based on the lightning current waveform coupling principle, and can obtain an accurate coupling transformer model, which is helpful for analyzing the propagation and coupling process of the lightning current in the coupling transformer.

[0138] An implementation unit, used for establishing a calibration three-dimensional model according to the three-dimensional model of the airborne cable and the evaluation environment and the coupling transformer model;

[0139] The implementation unit is also used to place the target cable in the calibration three-dimensional model. Specifically, the coupling transformer model is imported into the three-dimensional model of the airborne cable and the evaluation environment; and the coupling transformer model is moved to the target cable to ensure that the target cable is sandwiched in the gap in the middle of the coupling transformer model.

[0140] The implementation unit is also used to set a calibration excitation current monitoring point at the connection port 4 of the cable shielding layer in the calibration three-dimensional model to monitor and adjust the magnitude of the excitation current to ensure that it meets the calibration requirements. At the same time, a 50-ohm matching impedance is connected to another connection port 5 of the cable shielding layer to ensure stable signal transmission and minimize reflection. In addition, 50-ohm loads are added to the connection ports 2 and 3 of the core respectively, and these loads are grounded to simulate the load conditions in the actual working environment to ensure stable signal transmission.

[0141] To apply the embodiments of this application, please refer to Figure 4-5 , Figure 4 is a structural diagram of a calibration three-dimensional model provided in an embodiment of the present application, which shows the placement of a target cable in the calibration three-dimensional model in this embodiment, as well as the specific structure of the calibration three-dimensional model;

[0142] Figure 5 It is an equivalent two-dimensional circuit diagram of the three-dimensional model provided in the embodiment of the present application, which represents the equivalent two-dimensional circuit diagram after the excitation current monitoring point setting, matching impedance connection, load addition and grounding adjustment of the calibrated three-dimensional model.

[0143] In one embodiment, the excitation module 20 includes a port unit, an electromagnetic subunit, a coupling subunit, and an excitation unit;

[0144] The port unit is used to establish an excitation port at the coaxial connector of the coupling transformer model in the calibration three-dimensional model;

[0145] The electromagnetic subunit is used to add an ideal excitation I1 to the excitation port, and control the ideal excitation I1 to generate a corresponding electromagnetic field within the target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model; wherein, the ideal excitation refers to an excitation waveform curve constructed based on precise data formulas and models during the simulation process, which completely excludes interference from factors such as actual device characteristics, signal interference, noise pollution, and nonlinear distortion; and this waveform model is a mathematical idealization, which is a continuous, pure, and perfect curve without any distortion;

[0146] The coupling subunit is used to control the coupling transformer model to couple the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction, so as to obtain the cable shielding layer current; wherein the cable shielding layer current is the induced current generated on the cable shielding layer after the ideal excitation I1 passes through the coupling transformer.

[0147] The excitation unit is used to extract an excitation current or voltage value corresponding to the ideal excitation I1 from the cable shielding layer current to obtain a calibrated excitation I2.

[0148] It should be noted that in simulation, ideal excitation is often added directly. Ideal excitation does not take into account the uncertainty impact of instruments and equipment in actual tests on the evaluation results. When simulation evaluation is performed according to this excitation, the result is quite different from the actual result. Therefore, it is necessary to establish a mathematical model of uncertainty to calibrate the ideal excitation. In the simulation method of this embodiment, the main simulation instrument is a coupling transformer. Therefore, when the calibration excitation I2 does not meet the preset error condition, it is necessary to calculate the influence factor K of the uncertainty of the coupling transformer through a mathematical model to enhance the reliability of the calibration result and further ensure the usefulness of the actual interference excitation I3.

[0149] The excitation module 20 of this embodiment can accurately simulate the actual excitation process by establishing an excitation port at the coaxial connector of the coupling transformer model and adding an ideal excitation, which helps to ensure the accuracy and reliability of the calibration results. The excitation energy is coupled to the shielding layer of the target cable through electromagnetic induction, so that the current on the shielding layer can be accurately measured to ensure the accuracy of the calibration excitation;

[0150] Moreover, the energy of the electromagnetic field is coupled to the shielding layer of the target cable through electromagnetic induction. This process has a higher energy transfer efficiency. Compared with other energy transfer methods, electromagnetic induction can reduce the loss of energy during the transfer process, thus ensuring that the target cable can obtain enough energy to generate significant shielding layer current.

[0151] In one embodiment, the calibration module 30 includes a first time unit, a second time unit, a first comparison unit, and a second comparison unit;

[0152] The first time unit is used to obtain the ideal excitation peak time T from the current time domain waveform of the ideal excitation I1. 理想激励峰值时间 and ideal excitation half peak time T 理想激励半峰值时间 ;

[0153] The second time unit is used to obtain the calibration excitation peak time T from the current time domain waveform of the calibration excitation I2 校准激励峰值时间 and calibration excitation half peak time T 校准激励半峰值时间 ;

[0154] The first comparison unit is used to determine the ideal excitation peak time T 理想激励峰值时间 and T 校准激励峰值时间 Between 校准激励峰值时间 =T 理想激励峰值时间 ±20%”, and the ideal excitation half peak time T 理想激励半峰值时间 and calibration excitation half peak time T 校准激励半峰值时间 Between 校准激励半峰值时间 =T 理想激励半峰值时间 ±20%”, the calibration excitation I2 is defined as the actual interference excitation I3.

[0155] A second comparison unit is used to introduce an uncertainty influence factor K if the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the above error standard, and calculate the actual interference excitation I3 according to the ideal excitation; wherein the actual interference excitation I3 = the ideal excitation I1 (1 + K);

[0156] Among them, the uncertainty influence factor K is:

[0157]

[0158] The calibration module 30 of this embodiment compares the peak time and half peak time of the ideal excitation and the calibration excitation, which can ensure the accuracy and reliability of the calibration process. If the difference between the time parameters is within the error standard range, the calibration excitation can be regarded as the actual interference excitation, thereby improving the accuracy of the calibration. When the parameters do not meet the error standard, the uncertainty influence factor is introduced to calculate the actual interference excitation. This method takes into account the influence of factors such as measurement error and system error on the calibration result, thereby enhancing the reliability of the calibration result.

[0159] In one embodiment, the evaluation module 40 includes a model unit and a simulation unit;

[0160] Among them, the model unit is used to establish a two-dimensional equivalent SPICE circuit model based on the three-dimensional model of the airborne cable and the evaluation environment, obtain a two-dimensional circuit simulation model of the cable lightning transient sensitivity, and introduce the actual interference excitation I3 at the connection port 4 of the cable shielding layer to simulate the electromagnetic interference in the real environment. At the same time, a 50-ohm matching impedance is connected to another connection port 5 of the cable shielding layer and grounded to ensure stable signal transmission and reduce reflections. In addition, in order to monitor the cable coupling current, a coupling current monitoring point is added to the connection port 2 of the core; and a 50-ohm load is connected to another connection port 3 of the core and grounded to simulate the load conditions in the actual working environment.

[0161] The simulation unit is used to simulate the lightning transient sensitivity of the target cable according to the actual interference excitation I3, and obtain the current evaluation result of the target cable being affected by the interference coupling; and according to the current evaluation result generated by the interference coupling, the sensitivity of the target cable to the lightning transient can be measured, and the protection design of the cable can be optimized accordingly.

[0162] To apply the embodiments of this application, please refer to Figure 6-7 ;

[0163] Figure 6Schematic diagram of a circuit simulation model provided in an embodiment of the present application, showing the wiring conditions of a simulated three-dimensional model corresponding to a two-dimensional circuit simulation model in this embodiment; Figure 6 As shown, the simulation three-dimensional model module stores the field information calculated by the three-dimensional structure model, that is, the SPICE circuit contains the field information of the three-dimensional structure model.

[0164] Figure 7 is a current evaluation result diagram provided in an embodiment of the present application, which shows an example of a current evaluation result obtained when a target cable is subjected to interference coupling in the present embodiment;

[0165] like Figure 7 As shown in the figure, the horizontal direction (horizontal axis) represents time in microseconds (us), and the vertical direction (vertical axis) represents the magnitude of the current in amperes (A); this figure is used to show the change of the current passing through the target cable over time in a certain period of time. Through this figure, you can intuitively see the fluctuation of the current over time, including the magnitude of the current, the trend of change, and whether there is abnormal current. This has important reference value for evaluating the lightning transient sensitivity of the target cable.

[0166] The evaluation module 40 of this embodiment can retain key structural and parameter information by converting the three-dimensional model of the airborne cable and the evaluation environment into a two-dimensional circuit simulation model, thereby ensuring the accuracy of the simulation. In the two-dimensional circuit simulation model, by adding actual interference excitation, the changes in parameters such as current and voltage during the lightning transient process can be accurately simulated, which is helpful for evaluating the transient response and sensitivity of the target cable in the lightning environment.

[0167] Overall, this embodiment has the following beneficial effects:

[0168] This application adds a preset ideal excitation to the port of the calibration three-dimensional model, and couples energy to the shielding layer of the target cable through electromagnetic induction. This step simulates the induction effect of the lightning transient electromagnetic field on the cable, and this simulation method takes into account the material properties of the cable and the electromagnetic characteristics of the surrounding environment, so that it can more accurately reflect the actual response of the cable in a lightning environment. The actual interference excitation is calculated based on the ideal excitation and the calibration excitation. It takes into account the electromagnetic response characteristics of the cable in a specific environment. Therefore, the actual interference excitation is more reliable than the idealized excitation form of ideal excitation and the simulated excitation form of calibration excitation. By calculating the actual interference excitation and simulating it, the errors caused by directly irradiating the cable with lightning pulses can be avoided, ensuring the accuracy of the current evaluation results.

[0169] In summary, the present application demonstrates a high degree of reusability and accuracy, and can pre-evaluate the lightning transient sensitivity items of airborne cables during the airborne cable design phase, which can save a lot of subsequent investigation and rectification time and R&D costs, and greatly improve the R&D efficiency of the cables.

[0170] Embodiment three:

[0171] An embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for simulating the transient induction sensitivity of a cable lightning;

[0172] Wherein, the simulation method of the transient induction sensitivity of cable lightning, if implemented in the form of a software functional unit and used as an independent product, can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0173] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for simulating cable lightning transient induction sensitivity, characterized in that: include: Place the target cable in a preset calibration 3D model; Adding a preset ideal excitation to the port of the calibration three-dimensional model, and coupling energy to the shielding layer of the target cable through electromagnetic induction to obtain a calibration excitation; Calculate the actual interference excitation according to the ideal excitation and the calibration excitation; A lightning transient sensitivity simulation is performed on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

2. A method for simulating cable lightning transient induction sensitivity according to claim 1, characterized in that: The calibrated three-dimensional model is specifically: According to the parameterization principle, a three-dimensional model is performed by defining several structural parameters of the target cable to obtain a three-dimensional model of the airborne cable and the evaluation environment; According to the lightning current waveform coupling principle, the coupling transformer is modeled in a three-dimensional environment to obtain a coupling transformer model; The calibration three-dimensional model is established according to the airborne cable and evaluation environment three-dimensional model and the coupling transformer model.

3. A method for simulating cable lightning transient induction sensitivity as claimed in claim 2, characterized in that: A preset ideal excitation is added to the port of the calibration three-dimensional model, and energy is coupled to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation, specifically: In the calibration three-dimensional model, establishing an excitation port at a coaxial connector of the coupling transformer model; Adding the ideal excitation to the excitation port, and coupling energy to the shielding layer of the target cable through electromagnetic induction to obtain a cable shielding layer current; An excitation current or voltage value corresponding to the ideal excitation is extracted from the cable shielding layer current to obtain the calibration excitation.

4. A method for simulating cable lightning transient induction sensitivity as claimed in claim 3, characterized in that: The ideal excitation is added to the excitation port, and the energy is coupled to the shielding layer of the target cable through electromagnetic induction to obtain the cable shielding layer current, which is specifically: Adding the ideal excitation to the excitation port, controlling the ideal excitation to generate a corresponding electromagnetic field within a target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model; The coupling transformer model is controlled to couple the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction, so as to obtain the shielding layer current of the cable.

5. The method for simulating cable lightning transient induction sensitivity according to claim 1, characterized in that: The actual interference excitation is calculated according to the ideal excitation and the calibration excitation, specifically: Obtaining an ideal excitation peak time and an ideal excitation half peak time from the current time domain waveform of the ideal excitation; Acquire the calibration excitation peak time and the calibration excitation half peak time from the current time domain waveform of the calibration excitation; If the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time meet a preset error standard, the calibration excitation is defined as the actual interference excitation; If the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the error standard, an uncertainty influencing factor is introduced, and the actual interference excitation is calculated based on the ideal excitation.

6. A method for simulating cable lightning transient induction sensitivity as claimed in claim 2, characterized in that: The target cable is simulated for lightning transient sensitivity according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling, specifically: Establishing a two-dimensional circuit simulation model of cable lightning transient sensitivity based on the three-dimensional model of the airborne cable and the evaluation environment; The actual interference excitation is added at the cable shielding layer connection port of the two-dimensional circuit simulation model, and the lightning transient sensitivity simulation of the target cable is performed according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

7. A simulation device for cable lightning transient induction sensitivity, characterized in that: It includes adjustment module, excitation module, calibration module and evaluation module; Wherein, the adjustment module is used to place the target cable in a preset calibration three-dimensional model; The excitation module is used to add a preset ideal excitation to the port of the calibration three-dimensional model, and couple energy to the shielding layer of the target cable through electromagnetic induction to obtain the calibration excitation; The calibration module is used to calculate the actual interference excitation according to the ideal excitation and the calibration excitation; The evaluation module is used to perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

8. The device for simulating cable lightning transient induction sensitivity according to claim 7, characterized in that: The calibrated three-dimensional model is specifically: According to the parameterization principle, a three-dimensional model is performed by defining several structural parameters of the target cable to obtain a three-dimensional model of the airborne cable and the evaluation environment; According to the lightning current waveform coupling principle, the coupling transformer is modeled in a three-dimensional environment to obtain a coupling transformer model; The calibration three-dimensional model is established according to the airborne cable and evaluation environment three-dimensional model and the coupling transformer model.

9. A simulation device for cable lightning transient induction sensitivity as claimed in claim 8, characterized in that: The excitation module includes a port unit, a current unit and an excitation unit; Wherein, the port unit is used to establish an excitation port at the coaxial connector of the coupling transformer model in the calibration three-dimensional model; The current unit is used to add the ideal excitation to the excitation port and couple the energy to the shielding layer of the target cable through electromagnetic induction to obtain the cable shielding layer current; The excitation unit is used to extract an excitation current or voltage value corresponding to the ideal excitation from the cable shielding layer current to obtain the calibration excitation.

10. A device for simulating cable lightning transient induction sensitivity according to claim 9, characterized in that: The current unit includes an electromagnetic subunit and a coupling subunit; Wherein, the electromagnetic subunit is used to add the ideal excitation to the excitation port, and control the ideal excitation to generate a corresponding electromagnetic field within the target range of the coupling transformer model through the electromagnetic induction of the coupling transformer model; The coupling subunit is used to control the coupling transformer model to couple the energy of the electromagnetic field to the shielding layer of the target cable through electromagnetic induction to obtain the shielding layer current of the cable.

11. A device for simulating cable lightning transient induction sensitivity according to claim 8, characterized in that: The calibration module includes a first time unit, a second time unit, a first comparison unit and a second comparison unit; Wherein, the first time unit is used to obtain the ideal excitation peak time and the ideal excitation half-peak time from the current time domain waveform of the ideal excitation; The second time unit is used to obtain the calibration excitation peak time and the calibration excitation half-peak time from the current time domain waveform of the calibration excitation; The first comparison unit is configured to define the calibration excitation as the actual interference excitation if a preset error standard is satisfied between the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time; The second comparison unit is used to introduce an uncertainty influencing factor if the ideal excitation peak time, the ideal excitation half-peak time, the calibration excitation peak time and the calibration excitation half-peak time do not meet the error standard, and calculate the actual interference excitation based on the ideal excitation.

12. The device for simulating cable lightning transient induction sensitivity according to claim 9, characterized in that: The evaluation module includes a model unit and a simulation unit; Wherein, the model unit is used to establish a two-dimensional circuit simulation model of cable lightning transient sensitivity based on the three-dimensional model of the airborne cable and the evaluation environment; The simulation unit is used to add the actual interference excitation at the cable shielding layer connection port of the two-dimensional circuit simulation model, and perform lightning transient sensitivity simulation on the target cable according to the actual interference excitation to obtain a current evaluation result of the target cable being subjected to interference coupling.

13. A storage medium, characterized in that: The storage medium stores a computer program, which is called and executed by a computer to implement a method for simulating lightning transient induction sensitivity of a cable as described in any one of claims 1 to 6.

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