CN118036344A

CN118036344A - Simulation test method and device for automobile power line interference source and storage medium

Info

Publication number: CN118036344A
Application number: CN202410432239.XA
Authority: CN
Inventors: 许丰; 范书华; 周旋; 赵有为; 宋郝; 李鹏; 范申
Original assignee: Xuzhou Xugong Automobile Manufacturing Co ltd
Current assignee: Xuzhou Xugong Automobile Manufacturing Co ltd
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2024-05-14

Abstract

The disclosure relates to a simulation test method and device for an automobile power line interference source and a storage medium. The simulation test method of the automobile power line interference source comprises the following steps: determining a test object, wherein the test object is an automobile power line interference source to be tested; determining a simulation model according to the test object, wherein the simulation model adopts a mathematical model and an expression to represent environmental factors; setting simulation parameters; operating a simulation model to obtain a voltage waveform and a current waveform of the circuit; and according to the simulation result, analyzing the voltage waveform and the current waveform of the automobile power line interference source, and judging whether transient interference exists. The present disclosure, through designing complex mathematical expressions and environmental factors, can generate test data with sufficient complexity and diversity to evaluate the anti-interference capability of an automotive power line.

Description

Simulation test method and device for automobile power line interference source and storage medium

Technical Field

The disclosure relates to the technical field of vehicle simulation, in particular to a simulation test method and device for an automobile power line interference source and a storage medium.

Background

Automotive power line transient disturbances refer to abrupt or fluctuating instantaneous voltage or current due to various factors in the automotive electrical system. These sources of interference may come from the ignition system of the engine, the switching of the motor, electromagnetic interference, etc. The transient interference may cause interference to the normal operation of the automotive electrical equipment and even cause faults, and in order to ensure the stable operation and the anti-interference capability of the automotive electrical equipment, simulation test is required to be performed on an interference source of an automotive power line.

Disclosure of Invention

The inventors found through research that: the related art test method mainly includes actual testing. Practical testing is limited by the large amount of time and resources required and the difficulty in controlling environmental conditions.

In view of at least one of the above technical problems, the present disclosure provides a simulation test method and apparatus for an interference source of an automotive power line, and a storage medium, by designing complex mathematical expressions and environmental factors, test data with sufficient complexity and diversity can be generated to evaluate the anti-interference capability of the automotive power line.

According to another aspect of the present disclosure, there is provided a simulation test method of an interference source of an automotive power line, including:

Determining a test object, wherein the test object is an automobile power line interference source to be tested;

determining a simulation model according to the test object, wherein the simulation model adopts a mathematical model and an expression to represent environmental factors;

Setting simulation parameters;

operating a simulation model to obtain a voltage waveform and a current waveform of the circuit;

and according to the simulation result, analyzing the voltage waveform and the current waveform of the automobile power line interference source, and judging whether transient interference exists.

In some embodiments of the present disclosure, the simulation test method of the automobile power line interference source further includes:

and according to the analysis result, adjusting simulation parameters and optimizing a test scheme.

In some embodiments of the present disclosure, the adjusting the simulation parameters, optimizing the test scheme includes:

Simulating interference sources under different working conditions by adjusting characteristics of input signals, wherein the characteristics comprise at least one of amplitude and frequency, and the different working conditions are working conditions that the input signals are different in amplitude and frequency;

Adjusting the test position;

and (5) adjusting the test mode.

In some embodiments of the present disclosure, the simulating the interference source under different working conditions by adjusting the characteristics of the input signal includes:

under the condition that the frequency of the input signal is unchanged, the amplitude of the input signal is changed, so that the analog input signal is an interference source under different amplitudes;

In the case where the amplitude of the input signal is unchanged, the analog input signal is an interference source at different frequencies by changing the frequency of the input signal.

In some embodiments of the present disclosure, the varying the amplitude of the input signal includes: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the amplitude of the original input signal as the amplitude of the current input signal; and in the case that the current test is not the first test, increasing the amplitude of the input signal tested at the previous time of the current test by a preset amplitude increment to serve as the amplitude of the current input signal.

In some embodiments of the present disclosure, the step of varying the frequency of the input signal comprises: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the frequency of the original input signal as the amplitude of the current input signal; and in the case that the current test is not the first test, increasing the frequency of the input signal tested at the previous time of the current test by a preset frequency increment to serve as the frequency of the current input signal.

An increment value is determined based on at least one of system tolerance, equipment specification and requirements, a priori knowledge and experience, experimental objectives, and test requirements, wherein the increment value includes at least one of a predetermined amplitude increment and a predetermined frequency increment.

In some embodiments of the present disclosure, the determining the delta value based on at least one of system tolerance, equipment specification and requirements, a priori knowledge and experience, experimental objectives, and test requirements comprises:

Determining a reference value according to the tolerance and specification requirements of the system, wherein the reference value is used for representing the maximum amplitude or the minimum frequency which can be tolerated by the system;

determining a target range according to a test requirement, wherein the target range is used for representing an amplitude or frequency range to be tested;

determining the increment number to be tested according to the actual demand and the test time;

and determining an increment value according to the increment number, the target range and the reference value.

In some embodiments of the present disclosure, the determining the increment value according to the increment number, the target range, and the reference value includes:

And determining an increment value according to the ratio of the difference value of the reference value and the target range to the increment number.

In some embodiments of the present disclosure, the determining the reference value according to the system tolerance and specification requirements includes at least one of the following steps:

determining a reference value according to the maximum tolerance amplitude;

Determining a reference value according to the minimum tolerance frequency;

And determining the reference value according to the product of the maximum tolerance amplitude and the minimum tolerance frequency.

In some embodiments of the present disclosure, the determining the reference value according to the maximum tolerated amplitude includes: the maximum tolerance amplitude is taken as a reference value.

In some embodiments of the disclosure, the determining the reference value according to the minimum tolerance frequency includes: the minimum tolerance frequency is taken as a determination reference value.

In some embodiments of the disclosure, the determining the reference value according to a product of the maximum tolerated amplitude and the minimum tolerated frequency includes: the product of the maximum tolerance amplitude and the minimum tolerance frequency is taken as a reference value.

In some embodiments of the present disclosure, the determining the reference value according to the system tolerance and specification requirements includes:

The reference value is calculated based on a polynomial function, an exponential function, or a custom higher order function of the environmental factors.

adopting at least one of polynomial function, exponential function, trigonometric function, logarithmic function, hyperbolic function and power function as the expression of environmental factor;

and adjusting the values of parameters in polynomial functions, exponential functions, trigonometric functions, logarithmic functions, hyperbolic functions and power functions, and simulating real environmental changes.

In some embodiments of the present disclosure, the expression employing at least one of a polynomial function, an exponential function, a trigonometric function, a logarithmic function, a hyperbolic function, a power function as an environmental factor includes at least one of the following steps, wherein:

Adopting a first expression as an expression of an environmental factor, wherein the first expression is a sum of a trigonometric function and an exponential function;

adopting a second expression as an expression of an environmental factor, wherein the second expression is a sum of a polynomial function and a logarithmic function;

An expression containing a hyperbolic function and a power function is adopted as an expression of an environmental factor, wherein the second expression is a sum of the hyperbolic function and the power function.

In some embodiments of the present disclosure, the trigonometric function is a sine function, and the expression employing the first expression as the environmental factor includes:

Determining an amplitude parameter of a sine function according to the test requirement and the system specification requirement, wherein the amplitude parameter is used for representing the maximum value or the minimum value of an interference signal;

according to the frequency of the transient voltage interference to be tested, determining the frequency parameter of a sine function, wherein the frequency parameter is used for representing the change speed of an interference signal;

According to actual conditions and test requirements, determining an amplitude parameter and an index parameter of an index function, wherein the amplitude parameter of the index function is used for increasing or attenuating speed of an interference signal, and the index parameter of the index function is used for changing rules of the interference signal;

And determining the first expression according to the amplitude parameter of the sine function, the frequency parameter of the sine function, the amplitude parameter of the exponential function and the exponential parameter, wherein the trigonometric function and the exponential function are functions of time.

In some embodiments of the present disclosure, the second expression is a sum of a polynomial function and a logarithmic function of time, the polynomial function and the logarithmic function being functions of time, the polynomial function including a quadratic term and a cubic term;

the expression using the second expression as an environmental factor includes:

Determining a quadratic term parameter according to the test requirement and the system specification requirement, wherein the quadratic term parameter is used for representing the quadratic variation trend of the interference signal;

Determining a cubic term parameter according to the test requirement and the system specification requirement, wherein the cubic term parameter is used for representing the cubic variation trend of the interference signal;

According to actual conditions and test requirements, determining amplitude parameters and logarithmic parameters of a logarithmic function, wherein the amplitude parameters and the logarithmic parameters of the logarithmic function are used for representing logarithmic variation trend of interference signals;

and determining the second expression according to the quadratic term parameter, the cubic term parameter, the amplitude parameter and the logarithmic parameter of the logarithmic function.

In some embodiments of the present disclosure, the hyperbolic function and the power function are functions of time, and the expression employing the third expression as the environmental factor includes:

determining amplitude parameters and frequency parameters of a hyperbolic function according to test requirements and system specification requirements, wherein the amplitude parameters and the frequency parameters of the hyperbolic function are used for representing the change trend of an interference signal;

determining an amplitude parameter and a power exponent parameter of a power function according to actual conditions and test requirements, wherein the amplitude parameter and the power exponent parameter of the power function are used for the relation between the amplitude and the time of an interference signal;

And determining the third expression according to the amplitude parameter and the frequency parameter of the hyperbolic function, the amplitude parameter and the power exponent parameter of the power function.

And using actual test equipment to perform actual test on the test object, and verifying the simulation result.

according to the actual use environment, setting proper simulation conditions, wherein the simulation conditions comprise at least one of temperature and humidity.

In some embodiments of the present disclosure, the determining a simulation model from the test object includes:

and selecting a proper simulation model according to the characteristics of the test object.

and establishing a simulation model according to the circuit schematic diagram of the test object.

In some embodiments of the present disclosure, the simulation parameters include at least one of an input voltage, a load current, and an operating frequency.

In some embodiments of the present disclosure, the automotive power cord interference source is at least one of an engine control unit, an ignition system, and a motorized window control.

According to another aspect of the present disclosure, there is provided a simulation test apparatus for an interference source of an automotive power line, including:

The test object determining module is configured to determine a test object, wherein the test object is an automobile power line interference source to be tested;

the simulation model determining module is configured to determine a simulation model according to the test object, wherein the simulation model adopts a mathematical model and an expression to represent environmental factors;

The simulation parameter setting module is configured to set simulation parameters;

The simulation module is configured to run the simulation model to obtain a voltage waveform and a current waveform of the circuit;

The analysis module is configured to analyze the voltage waveform and the current waveform of the automobile power line interference source according to the simulation result and judge whether transient interference exists.

A memory configured to store instructions;

And the processor is configured to execute the instructions, so that the simulation test device of the automobile power line interference source realizes the simulation test method of the automobile power line interference source according to any embodiment.

According to another aspect of the present disclosure, there is provided a computer readable storage medium, wherein the computer readable storage medium stores computer instructions that, when executed by a processor, implement a simulation test method for an automotive power line interference source according to any one of the embodiments above.

The present disclosure, through designing complex mathematical expressions and environmental factors, can generate test data with sufficient complexity and diversity to evaluate the anti-interference capability of an automotive power line.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 is a schematic diagram of some embodiments of a simulation test method for an automotive power line interference source of the present disclosure.

Fig. 2 is a schematic diagram of another embodiment of a simulation test method for an interference source of an automotive power line according to the present disclosure.

FIG. 3 is a schematic diagram of some embodiments of the increment determination method of the present disclosure.

Fig. 4 is a schematic structural diagram of some embodiments of a simulation test apparatus for an automotive power line interference source of the present disclosure.

Fig. 5 is a schematic structural diagram of another embodiment of a simulation test apparatus for an interference source of an automotive power line according to the present disclosure.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Fig. 1 is a schematic diagram of some embodiments of a simulation test method for an automotive power line interference source of the present disclosure. Fig. 1 may be performed by a simulation test apparatus of the disclosed automotive power cord interference source. As shown in fig. 1, the method of the embodiment of fig. 1 may include at least one of steps 100 through 500.

Step 100, determining a test object, wherein the test object is an automobile power line interference source to be tested.

In some embodiments of the present disclosure, the automotive power cord interference source is at least one of an Engine Control Unit (ECU), an ignition system, a power window controller, and the like.

In some embodiments of the present disclosure, step 100 may include: a source of automotive power cord interference to be tested, such as an engine control unit, ignition system, motorized window controls, etc., is selected.

Step 200, determining a simulation model according to the test object, wherein the simulation model adopts a mathematical model and an expression to represent environmental factors.

In some embodiments of the present disclosure, step 200 may include: and selecting a proper simulation model according to the characteristics of the test object.

In some embodiments of the present disclosure, step 200 may include: and establishing a simulation model according to the circuit schematic diagram of the test object.

In some embodiments of the present disclosure, step 200 may include: based on the schematic circuit diagram of the test object, a simulation model is built using circuit simulation software, such as SPICE, LTspice.

And 300, setting simulation parameters according to actual conditions.

In some embodiments of the present disclosure, the simulation parameters may include at least one of input voltage, load current, and operating frequency.

Step 400, running a simulation model to obtain a voltage waveform and a current waveform of the circuit.

In some embodiments of the present disclosure, step 400 may include: and (5) performing simulation.

And 500, analyzing the voltage waveform and the current waveform of the automobile power line interference source according to the simulation result, and judging whether transient interference exists.

In some embodiments of the present disclosure, step 400 may include: and analyzing simulation results.

Fig. 2 is a schematic diagram of another embodiment of a simulation test method for an interference source of an automotive power line according to the present disclosure. Fig. 2 may be performed by a simulation test apparatus of the disclosed automotive power cord interference source. As shown in fig. 2, the simulation test method of the power line interference source of the automobile of the present disclosure may further include at least one of steps 600 to 700 in addition to the steps of the embodiment of fig. 1.

Step 600, according to the analysis result, the simulation parameters are adjusted, the test scheme is optimized, and the accuracy and the reliability of the test are ensured.

In some embodiments of the present disclosure, optimizing the test protocol in step 600 may be considered in several respects.

First, selecting a proper simulation model: and selecting a proper simulation model according to the characteristics of the test object. The model can be developed by using the existing model library or by itself according to actual conditions.

Second, determining simulation parameters: and reasonably setting simulation parameters according to actual conditions. Such as input voltage, load current, operating frequency, etc. According to the requirements, multiple groups of parameters can be simulated to obtain more comprehensive results.

Third, setting simulation conditions: and setting proper simulation conditions according to the actual use environment. Such as temperature, humidity, etc. These conditions may have an impact on the generation and propagation of the interferer.

Fourth, simulation result analysis: and carrying out detailed analysis on the simulation result to determine the generation and propagation paths of the interference sources. By observing the change condition of voltage and current waveforms, spectrum analysis and the like.

Fifth, optimizing test scheme: and optimizing the test scheme according to the analysis result. The characteristics of the input signal may be adjusted, e.g. changing amplitude, frequency, etc. The present disclosure may also adjust the test location and measurement mode to obtain more accurate test results.

And 700, performing actual testing on the test object by using actual testing equipment, and verifying the simulation result. The method and the device can verify the accuracy and the reliability of the simulation result.

According to the embodiment of the invention, the simulation test method of the interference source of the automobile power line can be established, and the accurate and rapid test of the interference source of the automobile circuit is realized, so that the reliability and stability of the automobile circuit are improved.

The specific embodiments may vary from case to case, the following being one example:

It is assumed that the source of interference of the automotive ignition system with the power cord is to be tested. First, a simulation model of an ignition system is built, including an ignition control unit, an ignition coil, and the like. Simulation parameters such as the frequency, amplitude of the ignition control signal are set. And running a simulation model, and observing the voltage waveform on the power line. And analyzing the reason and the propagation path of the interference source of the ignition system to the power line according to the simulation result. According to the analysis result, simulation parameters, such as the frequency and the amplitude of the ignition control signal, can be adjusted to simulate interference sources under different working conditions. The test scheme is further optimized, for example, the measurement position is changed, and the measurement method is adjusted, so that more accurate test results can be obtained.

The present disclosure provides a method for simulation testing of an automotive power cord interference source. The method aims at simulating complex environmental factors and generating test data with enough complexity and diversity to evaluate the anti-interference capability of an automobile power line on transient interference.

In some embodiments of the present disclosure, in step 600 of the embodiment of fig. 2, the step of adjusting the simulation parameters and optimizing the test scheme may include: simulating interference sources under different working conditions by adjusting characteristics of input signals, wherein the characteristics comprise at least one of amplitude and frequency, and the different working conditions are working conditions that the input signals are different in amplitude and frequency; adjusting the test position; and (5) adjusting the test mode.

One way to optimize the test scheme is to adjust the characteristics of the input signal, including changing amplitude and frequency. According to the method and the device, the interference sources under different working conditions can be simulated by adjusting the characteristics of the input signals, so that more comprehensive and accurate test results are obtained.

In some embodiments of the present disclosure, the step of simulating the interference source under different conditions by adjusting the characteristics of the input signal may include at least one of step 610 and step 620.

In step 610, by changing the amplitude of the input signal, the interference sources under different working conditions can be simulated. The larger the amplitude, the more significant the disturbance may be. The amplitude can be increased stepwise and the change in the test results observed.

In some embodiments of the present disclosure, step 610 may include: in the case of an unchanged frequency of the input signal, the analog input signal is an interferer at different amplitudes by varying the amplitude of the input signal.

In some embodiments of the present disclosure, the step of varying the amplitude of the input signal may include: the amplitude of the previous input signal is increased by one increment as the amplitude of the current input signal for each test based on the amplitude of the previous input signal.

In some embodiments of the present disclosure, the step of varying the amplitude of the input signal may include: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the amplitude of the original input signal as the amplitude of the current input signal; and in the case that the current test is not the first test, increasing the amplitude of the input signal tested at the previous time of the current test by a preset amplitude increment to serve as the amplitude of the current input signal.

Step 620 simulates sources of interference at different frequencies by varying the frequency of the input signal. Interference sources of the same frequency may have an effect on systems of different frequency bands. The frequency can be changed stepwise and the change in test results observed.

In some embodiments of the present disclosure, step 620 may include: in the case where the amplitude of the input signal is unchanged, the analog input signal is an interference source at different frequencies by changing the frequency of the input signal.

In some embodiments of the present disclosure, the step of varying the frequency of the input signal may include: the frequency of the previous input signal is increased by one increment as the frequency of the current input signal for each test based on the frequency of the previous input signal.

In some embodiments of the present disclosure, the step of varying the frequency of the input signal may include: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the frequency of the original input signal as the amplitude of the current input signal; and in the case that the current test is not the first test, increasing the frequency of the input signal tested at the previous time of the current test by a preset frequency increment to serve as the frequency of the current input signal.

The specific calculation method depends on the specific case of the test and the tool used. The following are specific aspects of some embodiments of the present disclosure:

assuming that an ignition system is to be tested for a source of interference to the power cord, the test scheme may be optimized according to the following steps:

Amplitude of change: assuming that the amplitude of the original input signal is V1, the amplitude may be gradually increased, for example by an increment Δv, to obtain input signals with different amplitudes, such as v1, v1+Δ V, V1+2Δv, etc.

Changing the frequency: assuming that the frequency of the original input signal is f1, the frequency may be changed step by step, for example by adding an increment Δf, to obtain input signals with different frequencies, such as f1, f1+Δf, f1+2Δf, etc.

The present disclosure can obtain a range of different input signals by varying the amplitude and frequency. At each input signal, a simulation model is run to observe the voltage waveform on the power line. The waveform under each input signal is analyzed, and the influence condition of interference sources under different amplitudes and frequencies can be obtained.

The specific calculation method of the present disclosure may vary from case to case, and the circuit simulation software, for example SPICE, LTspice, may be used to perform simulation calculation according to actual needs. In simulation software, the amplitude and frequency of an input signal can be set, and a simulation model is operated to obtain the voltage waveform of the circuit. The present disclosure can evaluate the extent of influence of interference sources at different amplitudes and frequencies by analyzing waveforms.

In some embodiments of the present disclosure, the simulation test method of the automobile power line interference source may further include: an increment value is determined based on at least one of system tolerance, equipment specification and requirements, a priori knowledge and experience, experimental objectives, and test requirements, wherein the increment value includes at least one of a predetermined amplitude increment and a predetermined frequency increment.

In some embodiments of the present disclosure, determining the specific value of the increment may require evaluation and adjustment on a case-by-case basis, and the determination of the increment may take into account several factors.

System tolerance: the size of the increment is determined according to the tolerance of the system. The higher the tolerance of the system to interference is, the increment can be properly increased; conversely, at lower tolerances, the delta should be moderately reduced.

Equipment specification and requirements: the size of the increment is determined according to the specification and the requirement of the equipment. For example, the device specifies a range of voltage fluctuations within a certain range, and the magnitude of the increment may be determined according to the specified range.

Priori knowledge and experience: with some knowledge and experience of the characteristics of the system and the impact of the source of interference, the magnitude of the increment may be determined with reference to previous test results or related literature.

Experimental purposes and test requirements: the size of the increment is determined according to the purpose of the experiment and the test requirement. If the performance of the test system in the poor condition is required, the increment can be increased appropriately; if a more comprehensive understanding of the performance of the system is desired, a number of different delta values may be employed.

In summary, the determination of the increment requires the integrated consideration of a plurality of factors, and the evaluation and adjustment are performed according to the specific situation. The size of the increment may be determined based on a priori knowledge, experience, and test requirements. In actual testing, the most appropriate increment value may also be determined by observing the change in test results in a stepwise incremental manner.

Because the increment size needs to comprehensively consider a plurality of factors, a general formula is difficult to give. The method can automatically design an evaluation method according to specific situations and test requirements to determine the increment size. The evaluation method in some embodiments of the present disclosure is given below.

FIG. 3 is a schematic diagram of some embodiments of the increment determination method of the present disclosure. Fig. 3 may be performed by a simulation test apparatus of the disclosed automotive power cord interference source. As shown in fig. 3, the simulation test method of the power line interference source of the automobile of the present disclosure may further include at least one of steps 31 to 34 in addition to the steps of the embodiment of fig. 1.

And step 31, determining a reference value B according to the system tolerance and specification requirements, wherein the reference value B is used for representing the maximum amplitude or the minimum frequency which can be tolerated by the system.

And step 32, determining a target range A according to the test requirement, wherein the target range A is used for representing the amplitude or frequency range to be tested.

And step 33, determining the increment number N to be tested according to the actual demand and the test time.

And step 34, determining an increment value according to the increment number, the target range and the reference value.

In some embodiments of the present disclosure, step 34 may include: and determining an increment value I according to the ratio of the difference value of the reference value and the target range to the increment number.

In some embodiments of the present disclosure, step 34 may include: the increment is determined according to equation (1).

I = (A - B) / N （1）

In some embodiments of the present disclosure, the amplitude or frequency of the input signal is gradually increased or decreased according to the increment value I, and a change in the test result is observed. The method and the device can judge whether the increment value needs to be adjusted according to the test result so as to achieve the optimal test effect.

In some embodiments of the present disclosure, in actual testing, the most suitable increment value may be determined by observing the change of the test result in a stepwise increasing or decreasing increment manner, so based on this, the present disclosure presents the calculation manner of the inventive core protection point, B.

In some embodiments of the present disclosure, the calculation formula for the reference value B may be determined in consideration of the following factors, depending on the system tolerance and specification requirements:

First, a reference value is determined according to the maximum tolerance.

In some embodiments of the present disclosure, the determining of the reference value according to the maximum tolerance amplitude may include: the maximum tolerance amplitude is taken as a reference value.

In some embodiments of the present disclosure, the maximum tolerated amplitude may be defined as the reference value B if the system requires operation within a particular voltage range. Assuming that the maximum tolerated amplitude is Vmax, the reference value B may be calculated according to equation (2).

B = Vmax （2）

And secondly, determining a reference value according to the minimum tolerance frequency.

In some embodiments of the present disclosure, the determining of the reference value according to the minimum tolerance frequency may include: the minimum tolerance frequency is taken as a determination reference value.

In some embodiments of the present disclosure, if the system has specific requirements for the frequency of the interfering signal, the minimum tolerated frequency may be defined as the reference value B. Assuming that the minimum tolerated frequency is Fmin, the reference value B may be calculated according to equation (3).

B = Fmin （3）

Thirdly, determining a reference value according to the product of the maximum tolerance amplitude and the minimum tolerance frequency.

In some embodiments of the present disclosure, the step of determining the reference value according to a product of the maximum tolerated amplitude and the minimum tolerated frequency may include: the product of the maximum tolerance amplitude and the minimum tolerance frequency is taken as a reference value.

In some embodiments of the present disclosure, if the system has requirements on both the amplitude and the frequency of the interfering signal, the integrated tolerance may be defined as the reference value B. Assuming that the maximum tolerance amplitude is Vmax and the minimum tolerance frequency is Fmin, the reference value B can be calculated according to formula (4).

B = Vmax * Fmin （4）

In some embodiments of the present disclosure, step 31 of the embodiment of fig. 3 may include: the reference value is calculated based on a polynomial function, an exponential function, or a custom higher order function of the environmental factors.

In some embodiments of the present disclosure, step 31 of the embodiment of fig. 3 may include: using a polynomial function to calculate the reference value B, the complexity of the formula can be increased by adjusting the coefficients and exponents of the polynomial. For example, the reference value B may be calculated using a polynomial function in the form of formula (5).

B = a_n* Tⁿ+ a_n-1* T^n-1+ ... + a₁* T + a₀ （5）

In formula (5), a _i is a coefficient of a polynomial, n is a degree of the polynomial, and T is an environmental factor.

In other embodiments of the present disclosure, step 31 of the embodiment of fig. 3 may include: using an exponential function to calculate the reference value B, the complexity of the formula can be increased by adjusting the base of the exponential function and the exponent. For example, the reference value B may be calculated using an exponential function in the form of formula (6).

B = a * e^bt （6）

In the formula (6), a and b are parameters of an exponential function, and T is an environmental factor.

In other embodiments of the present disclosure, step 31 of the embodiment of fig. 3 may include: according to the actual demand, a custom high-order function can be designed to calculate the reference value B. The present disclosure may use different functional forms and parameters to construct higher order functions depending on factors such as the characteristics of the system, environmental conditions, and sensitivity. For example, the present disclosure may calculate the reference value B using a complex mathematical model or a statistical model.

In some embodiments of the present disclosure, the simulation test method of the automobile power line interference source may further include: adopting at least one of polynomial function, exponential function, trigonometric function, logarithmic function, hyperbolic function and power function as the expression of environmental factor; and adjusting the values of parameters in polynomial functions, exponential functions, trigonometric functions, logarithmic functions, hyperbolic functions and power functions, and simulating real environmental changes.

The present disclosure gives an expression for environmental factors: the following example may be considered if an expression of the environmental factor T is required.

A first type of embodiment employs an expression containing trigonometric and exponential functions as the expression of the environmental factor.

In a first type of embodiment, the step of employing an expression comprising an expression of a trigonometric function and an exponential function as the expression of the environmental factor may comprise: the first expression is adopted as an expression of an environmental factor, wherein the first expression is a sum of a trigonometric function and an exponential function.

In some embodiments of the present disclosure, the step of employing the first expression as an expression of an environmental factor includes: determining an amplitude parameter of a sine function according to the test requirement and the system specification requirement, wherein the amplitude parameter is used for representing the maximum value or the minimum value of an interference signal; according to the frequency of the transient voltage interference to be tested, determining the frequency parameter of a sine function, wherein the frequency parameter is used for representing the change speed of an interference signal; according to actual conditions and test requirements, determining an amplitude parameter and an index parameter of an index function, wherein the amplitude parameter of the index function is used for increasing or attenuating speed of an interference signal, and the index parameter of the index function is used for changing rules of the interference signal; and determining the first expression according to the amplitude parameter of the sine function, the frequency parameter of the sine function, the amplitude parameter of the exponential function and the exponential parameter, wherein the trigonometric function and the exponential function are functions of time.

In some embodiments of the present disclosure, complex expressions with trigonometric and exponential functions are the present disclosure, as shown in equation (7).

T = a * sin(b * t) + c * exp(d * t) （7）

A, b, c, d in the formula (7) is a parameter, and t is time.

The design thought of the present disclosure is: in the complex expression (7) with trigonometric and exponential functions.

The parameter a controls the amplitude of the sinusoidal function, i.e. the maximum or minimum of the interfering signal.

The parameter b controls the frequency of the sinusoidal function, i.e. the rate of change of the interference signal.

The parameter c controls the amplitude of the exponential function, i.e. the rate of increase or decay of the interfering signal.

The parameter d controls the index of the exponential function, i.e. the law of variation of the interfering signal.

In the field of simulation test of automobile power line interference sources, the following is a specific example and description of beneficial effects thereof:

examples: it is assumed that the anti-jamming capability of the car power line against transient voltage jamming needs to be tested. Depending on the specification requirements and test requirements of the system, the present disclosure may design an expression of an environmental factor T as shown in equation (7).

The present disclosure may achieve the following advantageous effects by using an expression with a trigonometric function and an exponential function to simulate a transient voltage interference source.

The present disclosure improves complexity and randomness: the structure of this expression includes a sine function and an exponential function, so that the interference signal has a complex and various change rule. Therefore, the method and the device can better simulate the interference source under the actual condition, and improve the authenticity and reliability of the test.

The present disclosure provides for adjustability and flexibility: by adjusting the value of the parameter a, b, c, d, the method and the device can flexibly control the amplitude, the frequency and the change rule of the interference signal. This enables the present disclosure to simulate different types and intensities of interference sources to meet different test requirements and system specification requirements.

The present disclosure more approximates the actual situation: this expression combines a sinusoidal function and an exponential function, both of which are common laws of variation of the interfering signal. By using the expression, the method and the device can better approximate the transient voltage interference source which may occur in the actual situation, and improve the accuracy and the effectiveness of the test.

In general, the present disclosure can simulate complex, diverse, and approaching actual sources of interference by designing an expression of the environmental factor T, and adjusting the values of the parameters. The method is favorable for more accurately evaluating the anti-interference capability of the automobile power line on transient voltage interference, and improves the reliability and stability of the system.

Specific examples:

The method for determining the specific parameters can be adjusted and optimized according to actual requirements and system characteristics. The following is an example illustrating how the parameters are determined.

It is assumed that the anti-jamming capability of the car power cord for transient voltage jamming at a frequency of 100Hz needs to be tested. The present disclosure may use an expression of the environmental factor T as shown in formula (7).

Determining an amplitude parameter a: according to the test requirement and the system specification requirement, the maximum amplitude of transient voltage interference can be set to be 5V. Thus, the present disclosure may set parameter a to 5.

Determining a frequency parameter b: since the present disclosure is to test for transient voltage disturbances of 100Hz, the present disclosure can set the parameter b to 2pi×100=200pi, so that the period of the sine function is 100Hz.

Determining exponential function parameters c and d: depending on the actual situation and requirements, the present disclosure may determine parameters c and d according to the requirements for the amplitude of the interfering signal. Assuming that the present disclosure requires the interfering signal to decay to 10% of the original amplitude in 0.1 seconds, the present disclosure can set parameters c and d to achieve this decay rate.

Examples:

Assuming that the present disclosure sets parameters c to 0.9 and d to-5, the magnitude decay rate of the exponential function is relatively fast. Then the amplitude of the interfering signal will decay to 10% of the original amplitude within 0.1 seconds.

By such parameter setting, an expression of a specific environmental factor T can be obtained as shown in formula (8).

T = 5 * sin(200π * t) + 0.9 * exp(-5 * t) （8）

By this expression, a transient voltage disturbance signal with a frequency of 100Hz can be simulated, and the disturbance signal decays to 10% of the original amplitude within 0.1 seconds. Such simulations help to evaluate the anti-jamming capability of the automotive power cord for this particular transient disturbance. Of course, the specific parameter setting also needs to be adjusted and optimized according to the actual situation and the test requirement.

A second type of embodiment employs an expression comprising a polynomial function and a logarithmic function as the expression of the environmental factor.

In other embodiments of the present disclosure, the step of employing an expression including a polynomial function and a logarithmic function as an expression of an environmental factor may include: and adopting a second expression as an expression of the environmental factors, wherein the second expression is the sum of a polynomial function and a logarithmic function.

In other embodiments of the present disclosure, the step of employing the second expression as the expression of the environmental factor may include: determining a quadratic term parameter according to the test requirement and the system specification requirement, wherein the quadratic term parameter is used for representing the quadratic variation trend of the interference signal; determining a cubic term parameter according to the test requirement and the system specification requirement, wherein the cubic term parameter is used for representing the cubic variation trend of the interference signal; according to actual conditions and test requirements, determining amplitude parameters and logarithmic parameters of a logarithmic function, wherein the amplitude parameters and the logarithmic parameters of the logarithmic function are used for representing logarithmic variation trend of interference signals; and determining the second expression according to the quadratic term parameter, the cubic term parameter, the amplitude parameter and the logarithmic parameter of the logarithmic function.

In other embodiments of the present disclosure, the complex expression with the polynomial and logarithmic functions is shown in equation (9):

T = a * t²+ b * t³+ c * log(d * t) （9）

a, b, c, d in the formula (9) is a parameter, and t is time.

Design thought of formula (9):

Examples: it is assumed that the anti-jamming capability of the car power line against transient voltage jamming needs to be tested. Depending on the specification requirements and test requirements of the system, the present disclosure may design an expression of an environmental factor T as shown in equation (9).

The above embodiments of the present disclosure simulate a transient voltage interference source by an expression with a polynomial and a logarithmic function, and may obtain the following beneficial effects:

The above embodiments of the present disclosure may implement a simulation of polynomial terms: t ² and t ³ in the expression can simulate the secondary and tertiary variation trend of the interference signal. Therefore, an interference source under the actual condition can be better simulated, and the authenticity and reliability of the test are improved.

The above embodiments of the present disclosure may implement a simulation of a logarithmic function: log (d x t) in the expression can simulate the logarithmic trend of the interference signal. The logarithmic function is often used for simulating some nonlinear change rules, and interference sources which may occur in actual situations can be better approximated by using the logarithmic function.

The above embodiments of the present disclosure have flexibility and adjustability: the change trend and the intensity of the interference signal can be flexibly controlled by adjusting the value of the parameter a, b, c, d. This enables the present disclosure to simulate different types and intensities of interference sources to meet different test requirements and system specification requirements.

The above embodiments of the present disclosure more approximate the actual situation: by using complex expressions of polynomials and logarithmic functions, the present disclosure is able to better approximate sources of interference that may occur in practical situations. The method is favorable for more accurately evaluating the anti-interference capability of the automobile power line on transient voltage interference, and improves the reliability and stability of the system.

In general, the above embodiments of the present disclosure can simulate the interference sources of the variation trend of complex, polynomial and logarithmic functions by designing the expression of the environmental factor T and adjusting the values of the parameters. This helps to more accurately evaluate the anti-jamming capability of the automotive power cord against transient voltage disturbances and improves the reliability and stability of the system.

Specific examples:

the process of determining specific parameters needs to comprehensively consider test requirements, system specification requirements and actual conditions. The following is an example illustrating the process of how parameters are determined:

It is assumed that the anti-jamming capability of the car power cord for transient voltage jamming at a frequency of 100Hz needs to be tested. The present disclosure may use an expression of the environmental factor T as shown in formula (9).

Determining a quadratic term parameter a: according to the test requirement and the system specification requirement, the maximum amplitude of transient voltage interference can be set to be 5V, and the secondary change trend of the interference signal is close to the actual situation. Thus, the present disclosure may set the parameter a to an appropriate value, for example 0.1.

Determining a cubic item parameter b: according to the test requirement and the system specification requirement, the three-time change trend of the interference signal can be further considered by the method. If it is desired that the trend of the disturbance signal is closer to the actual situation, the parameter b may be set to a suitable value, for example 0.01.

Determining logarithmic function parameters c and d: according to actual situations and requirements, the present disclosure can determine parameters c and d according to requirements on the trend of the interference signal. Assuming that the present disclosure wishes for the interfering signal to decay to 10% of the original amplitude in 0.1 seconds, the present disclosure can set parameters c and d to achieve this decay rate.

Examples:

Assuming that the parameters c are set to 0.9 and d to 0.01, the amplitude decay rate of the logarithmic function is relatively slow. Then the amplitude of the interfering signal will decay to 10% of the original amplitude within 0.1 seconds.

By such parameter setting, a specific expression of the environmental factor T can be obtained as shown in formula (10):

T = 0.1 * t²+ 0.01 * t³+ 0.9 * log(0.01 * t) （10）

By this expression, a transient voltage disturbance signal with a frequency of 100Hz can be simulated, and the disturbance signal decays to 10% of the original amplitude within 0.1 seconds. Such simulations help to evaluate the anti-jamming capability of the automotive power cord for this particular transient disturbance.

It should be noted that the specific parameter settings also need to be adjusted and optimized according to the actual situation and the test requirements. In practical application, according to the characteristics of the system, environmental conditions, sensitivity and other factors, the expression and parameter values of the environmental factor T are designed and adjusted to ensure that the formula has reasonable physical significance and can accurately simulate the required interference signals.

A third type of embodiment employs an expression containing hyperbolic and power functions as the expression of the environmental factor.

In some embodiments of the present disclosure, the step of employing an expression including an expression of a hyperbolic function and a power function as an expression of an environmental factor may include: an expression containing a hyperbolic function and a power function is adopted as an expression of an environmental factor, wherein the second expression is a sum of the hyperbolic function and the power function.

In some embodiments of the present disclosure, the step of employing an expression including an expression of a hyperbolic function and a power function as an expression of an environmental factor may include: determining amplitude parameters and frequency parameters of a hyperbolic function according to test requirements and system specification requirements, wherein the amplitude parameters and the frequency parameters of the hyperbolic function are used for representing the change trend of an interference signal; determining an amplitude parameter and a power exponent parameter of a power function according to actual conditions and test requirements, wherein the amplitude parameter and the power exponent parameter of the power function are used for the relation between the amplitude and the time of an interference signal; and determining the third expression according to the amplitude parameter and the frequency parameter of the hyperbolic function, the amplitude parameter and the power exponent parameter of the power function.

In some embodiments of the present disclosure, the complex expression with hyperbolic and power functions is shown in equation (11).

T = a * sinh(b * t) + c * t^d （11）

In formula (11), a, b, c, d is a parameter, and t is time.

In practical application, the expression of the environmental factor T needs to be designed and adjusted according to the characteristics, environmental conditions, sensitivity and other factors of the system, so as to ensure that the formula has reasonable physical significance. At the same time, the present disclosure also considers the feasibility and efficiency of computation, avoiding too complex expressions leading to computation difficulties or excessive run times.

It is assumed that the anti-jamming capability of the car power cord for transient voltage jamming at a frequency of 100Hz needs to be tested. The present disclosure may use an expression of the environmental factor T as shown in formula (11). The disclosed method may then further comprise:

Determining hyperbolic function parameters a and b: according to the test requirement and the system specification requirement, the maximum amplitude of transient voltage interference can be set to be 5V, and the change trend of an interference signal is close to the actual situation. Thus, the present disclosure may set the parameter a to an appropriate value, for example, 0.1, and the parameter b may be adjusted according to the frequency of the interference signal, so that the trend of the hyperbolic function approaches the actual situation.

Determining power function parameters c and d: according to actual situations and requirements, the method can determine parameters c and d according to requirements of the change trend of the interference signals. Assuming that the present disclosure desires the amplitude of the interference signal to have a power function with respect to time, the present disclosure may set the parameter c to an appropriate value, for example, 0.01, and determine the parameter d according to the actual situation and the requirement.

Examples:

Let the present disclosure set parameter b to 0.05 so that the trend of the hyperbolic function will approach the actual situation. Meanwhile, the present disclosure sets the parameter d to 2 so that the relationship between the amplitude and time of the interference signal is a second power function.

By such parameter setting, the present disclosure can obtain an expression of a specific environmental factor T as shown in formula (12).

T = 0.1 * sinh(0.05 * t) + 0.01 * t² （12）

Through the expression, the transient voltage interference signal with the frequency of 100Hz can be simulated, and the change trend of the interference signal approaches to the actual situation. The combination of the hyperbolic function and the power function has flexibility in simulating the shape and the change trend of the interference signal, and can adapt to different test requirements and system specification requirements.

The present disclosure may achieve the following benefits by using expressions with hyperbolic and power functions to model a transient voltage interferer:

The above embodiments of the present disclosure may implement simulation of hyperbolic functions: by using hyperbolic functions to simulate the trend of the interference signal, the present disclosure is able to better approximate the sources of interference that may occur in actual situations. The hyperbolic function has flexibility in the variation trend of the interference signals, and can simulate interference signals of different types and shapes.

The above embodiments of the present disclosure may implement a simulation of a power function: by using a power function to model the relationship of amplitude and time of the interfering signal, the present disclosure is able to better approximate the interfering signal that may occur in actual situations. The power function has flexibility in describing the relation between the amplitude and the time of the interference signal, and can simulate the interference signals with different amplitude and time relations.

The above embodiments of the present disclosure have flexibility and adjustability: through adjusting the value of the parameter, the method and the device can flexibly control the change trend and the strength of the interference signal. This enables the present disclosure to simulate different types and intensities of interference sources to meet different test requirements and system specification requirements.

The above embodiments of the present disclosure approach the actual situation: by using a combination of hyperbolic and power functions, the present disclosure can be more in the field of simulation testing of automotive power line interferers, which may consider using hyperbolic and power functions to simulate the trend of the variation of the interferer.

The following is a specific example and description of its beneficial effects:

It is assumed that the present disclosure is to test the anti-jamming capability of an automotive power cord for transient voltage jamming at a frequency of 100 Hz. The present disclosure may use an expression of the environmental factor T as shown in formula (11).

Specific examples:

Determining parameters a and b of the hyperbolic function: according to the test requirement and the system specification requirement, the maximum amplitude of transient voltage interference can be set to be 5V, and the change trend of an interference signal is close to the actual situation. Thus, the present disclosure may set the parameter a to an appropriate value, for example 0.1. The parameter b can be adjusted to control the speed and shape of the variation of the interfering signal.

Determining parameters c and d of the power function: according to actual situations and requirements, the method can determine parameters c and d according to requirements of the change trend of the interference signals. Assuming that the present disclosure wishes the amplitude of the interfering signal to gradually increase with time, the parameter c may be set to an appropriate value, for example 0.01. The parameter d can be adjusted to control the speed and shape of the amplitude increase of the interfering signal.

Examples:

assuming that the parameter b is set to 0.1, the parameter c is set to 0.01, and the parameter d is set to 2, the shape of the hyperbolic function and the amplitude increasing speed of the power function are suitable.

By such parameter setting, the present disclosure can obtain an expression of a specific environmental factor T as shown in formula (13).

T = 0.1 * sinh(0.1 * t) + 0.01 * t² （13）

By this expression, the present disclosure can simulate a transient voltage disturbance signal with a frequency of 100Hz, whose amplitude gradually increases with the increase of time. Such simulations help to evaluate the anti-jamming capability of the automotive power cord for this particular transient disturbance.

The present disclosure is able to better approximate sources of interference that may occur in practical situations by using complex expressions of hyperbolic and power functions. This helps to more accurately evaluate the anti-jamming capability of the automotive power cord against transient voltage disturbances and improves the reliability and stability of the system.

The method has the specific beneficial effects that:

The above embodiments of the present disclosure may implement simulation of hyperbolic functions: the hyperbolic function can simulate the nonlinear variation trend of the interference signal and approximates to the interference source possibly occurring in the actual situation. By using hyperbolic functions, the present disclosure can more accurately simulate complex interference signal shapes and trends.

The above embodiments of the present disclosure may implement a simulation of a power function: the power function may simulate a trend in which the amplitude of the interference signal gradually increases with time. By using the power function, the method and the device can better simulate the amplitude variation trend of the interference source which may occur in actual conditions.

The above embodiments of the present disclosure have flexibility and adjustability: through adjusting the value of the parameter, the method and the device can flexibly control the shape, the amplitude increasing speed and the amplitude changing trend of the interference signal. This enables the present disclosure to simulate different types and intensities of interference sources to meet different test requirements and system specification requirements.

In general, by designing the expression of the environmental factor T and adjusting the values of the parameters, it is possible to simulate the interference sources of the variation trend of complex, hyperbolic and power functions. This helps to more accurately evaluate the anti-jamming capability of the automotive power cord against transient voltage disturbances and improves the reliability and stability of the system.

In the simulation test, the method can simulate complex environmental factors and generate test data with enough complexity and diversity.

The present disclosure contemplates suitable mathematical models and expressions to represent environmental factors. These expressions should be of sufficient complexity to simulate real environmental changes and ensure reasonable physical significance. To generate test data, the present disclosure may use mathematical tools such as polynomial functions, exponential functions, trigonometric functions, logarithmic functions, power functions, and the like. By adjusting parameters such as coefficients, exponents, bases, etc. of the functions, the complexity and diversity of the expression can be increased.

In addition, the present disclosure may also design a custom higher order function to calculate the reference value to meet the characteristics and sensitivity requirements of the system.

In addition, in simulation testing, the present disclosure also considers the feasibility and efficiency of the calculations. Excessively complex mathematical models and expressions may result in computational difficulties or excessive run-time.

Accordingly, the present disclosure requires selection of appropriate mathematical models and expressions, and necessary verification and optimization, according to practical requirements and computational resource constraints.

In a word, the simulation test method based on the mathematical model can effectively simulate the interference source of the automobile power line, and test data with enough complexity and diversity are generated to evaluate the anti-interference capability of the automobile power line. The method and the device can improve the accuracy and the reliability of the test by reasonably designing the mathematical model and the expression, and provide reference basis for the design and the optimization of the automobile electrical equipment.

Fig. 4 is a schematic diagram of some embodiments of a simulation test apparatus for an automotive power line interference source of the present disclosure. As shown in fig. 4, the simulation test apparatus of the power line interference source of the automobile of the present disclosure may include a test object determination module 41, a simulation model determination module 42, a simulation parameter setting module 43, a simulation module 44, and an analysis module 45.

The test object determining module 41 is configured to determine a test object, wherein the test object is an automobile power line interference source to be tested.

The simulation model determination module 42 is configured to determine a simulation model from the test object, wherein mathematical models and expressions are employed in the simulation model to represent environmental factors.

The simulation parameter setting module 43 is configured to set simulation parameters.

The simulation module 44 is configured to run a simulation model to derive a voltage waveform and a current waveform of the circuit.

The analysis module 45 is configured to analyze the voltage waveform and the current waveform of the automobile power line interference source according to the simulation result, and determine whether transient interference exists.

In some embodiments of the present disclosure, the simulation test apparatus of the automotive power line interference source of the present disclosure may be configured to perform the simulation test method of the automotive power line interference source according to any one of the embodiments described above.

Fig. 5 is a schematic structural diagram of another embodiment of a simulation test apparatus for an interference source of an automotive power line according to the present disclosure. As shown in fig. 5, the simulation test apparatus of the power line interference source of the automobile of the present disclosure includes a memory 51 and a processor 52.

The memory 51 is used for storing instructions, the processor 52 is coupled to the memory 51, and the processor 52 is configured to execute a simulation test method for implementing the power line interference source of the automobile according to the above embodiment based on the instructions stored in the memory.

As shown in fig. 5, the simulation test device of the automobile power line interference source further comprises a communication interface 53 for information interaction with other devices. Meanwhile, the simulation test device of the automobile power line interference source further comprises a bus 54, and the processor 52, the communication interface 53 and the memory 51 are in communication with each other through the bus 54.

The memory 51 may comprise a high-speed RAM memory or may further comprise a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 51 may also be a memory array. The memory 51 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules.

Further, the processor 52 may be a central processing unit CPU, or may be an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement embodiments of the present disclosure.

The present disclosure provides a method and apparatus for simulation testing of an automotive power line interference source. The present disclosure is directed to simulating complex environmental factors and generating test data of sufficient complexity and diversity to evaluate the anti-jamming capability of an automotive power line against transient disturbances.

The present disclosure calculates the reference value B by using complex mathematical expressions to ensure sufficient complexity and randomness.

The expression of the environmental factor T is designed and adjusted according to actual requirements so as to simulate complex environmental changes and ensure reasonable physical significance.

The present disclosure uses a polynomial function to calculate the reference value B, and adjusts the coefficients and indices of the polynomial according to actual requirements to increase the complexity of the formula.

The present disclosure uses an exponential function to calculate the reference value B, and adjusts the base of the exponential function and the exponent to increase the complexity of the formula.

According to the method and the device, the user-defined high-order function can be designed to calculate the reference value B according to actual requirements, so that requirements of characteristics, environmental conditions, sensitivity and the like of the system are met.

The present disclosure provides example expressions of some complex environmental factors T to increase the complexity and randomness of the simulation test.

The computer-readable storage medium of the present disclosure may be embodied as a non-transitory computer-readable storage medium.

The present disclosure provides a method for simulation testing of an automotive power cord interference source. Test data of sufficient complexity and diversity can be generated by designing complex mathematical expressions and environmental factors to evaluate the anti-interference capability of the automotive power line.

The present disclosure can select an appropriate computing method and an environmental factor expression according to actual needs, and perform necessary verification and optimization. At the same time, attention is paid to the feasibility and efficiency of computation, avoiding excessively complex expressions leading to computational difficulties or excessive run times.

In practical testing the present disclosure is not capable of power supply transient disturbances because the transformation of a point of the simulated waveform indicates a damage.

The present disclosure constantly tests these insignificant disturbances in the simulation to enable the system to have greater immunity to disturbances after the experiment, which is also an indispensable step in the simulation experiment to improve accuracy.

It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The simulation test apparatus, test object determination module, simulation model determination module, simulation parameter setting module, simulation module, and analysis module of the automotive power line interference source described above may be implemented as general purpose processors, programmable Logic Controllers (PLCs), digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof, for performing the functions described in the present disclosure.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of a method of an embodiment of the present disclosure may be implemented by hardware, which may be implemented as a general purpose processor, a programmable logic controller, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the methods described herein.

Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Those of ordinary skill in the art will appreciate that all or a portion of the steps implementing the above embodiments may be implemented by hardware, or may be implemented by a program indicating that the relevant hardware is implemented, where the program may be stored on a non-transitory computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or optical disk, etc.

The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A simulation test method for an interference source of an automobile power line comprises the following steps:

Setting simulation parameters;

2. The simulation test method of an automobile power line interference source according to claim 1, further comprising:

3. The simulation test method of the automobile power line interference source according to claim 2, wherein the adjusting simulation parameters and optimizing the test scheme comprise:

Adjusting the test position;

and (5) adjusting the test mode.

4. The simulation test method of the automobile power line interference source according to claim 3, wherein the simulation of the interference source under different working conditions by adjusting the characteristics of the input signal comprises:

5. The simulation test method of the automobile power line interference source according to claim 4, wherein:

Said varying the amplitude of the input signal comprises: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the amplitude of the original input signal as the amplitude of the current input signal; under the condition that the current test is not the first test, increasing the amplitude of the input signal tested at the previous time of the current test by a preset amplitude increment to serve as the amplitude of the current input signal;

The changing the frequency of the input signal comprises: judging whether the current test is the first test or not; under the condition that the current test is the first test, adopting the frequency of the original input signal as the amplitude of the current input signal; and in the case that the current test is not the first test, increasing the frequency of the input signal tested at the previous time of the current test by a preset frequency increment to serve as the frequency of the current input signal.

6. The simulation test method of the automobile power line interference source of claim 5, further comprising:

7. The method of claim 6, wherein the determining the delta value based on at least one of system tolerance, equipment specification and requirements, a priori knowledge and experience, experimental objectives, and test requirements comprises:

8. The simulation test method of the power line interference source of the automobile according to claim 7, wherein the determining the increment value according to the increment number, the target range and the reference value comprises:

9. The simulation test method of an automotive power line interference source according to claim 7 or 8, wherein the determining the reference value according to the system tolerance and specification requirements comprises at least one of the following steps:

determining a reference value according to the maximum tolerance amplitude;

Determining a reference value according to the minimum tolerance frequency;

10. The simulation test method of an automobile power line interference source according to claim 9, wherein:

the determining the reference value according to the maximum tolerance comprises the following steps: taking the maximum tolerance amplitude as a reference value;

the determining the reference value according to the minimum tolerance frequency comprises the following steps: taking the minimum tolerance frequency as a determination reference value;

the determining the reference value according to the product of the maximum tolerance amplitude and the minimum tolerance frequency comprises the following steps: the product of the maximum tolerance amplitude and the minimum tolerance frequency is taken as a reference value.

11. The simulation test method of an automobile power line interference source according to claim 7 or 8, wherein the determining the reference value according to the system tolerance and specification requirements comprises:

12. The simulation test method of an automobile power line interference source of claim 11, further comprising:

13. The simulation test method of an automotive power line interference source according to claim 12, wherein the expression employing at least one of a polynomial function, an exponential function, a trigonometric function, a logarithmic function, a hyperbolic function, and a power function as an environmental factor includes at least one of the following steps, wherein:

14. The simulation test method of an automobile power line interference source according to claim 13, wherein the trigonometric function is a sine function, and the expression using the first expression as an environmental factor comprises:

15. The simulation test method of an automobile power line interference source according to claim 13, wherein the second expression is a sum of a polynomial function and a logarithmic function of time, the polynomial function and the logarithmic function being functions of time, the polynomial function including a quadratic term and a cubic term;

the expression using the second expression as an environmental factor includes:

16. The simulation test method of an automobile power line interference source according to claim 13, wherein the hyperbolic function and the power function are functions of time, and the expression using the third expression as an environmental factor comprises:

17. The simulation test method of an automotive power line interference source according to any one of claims 1 to 8, further comprising:

18. The simulation test method of an automotive power line interference source according to any one of claims 1 to 8, further comprising:

19. The simulation test method of an automotive power line interference source according to any one of claims 1 to 8, wherein the determining a simulation model according to a test object includes:

selecting a proper simulation model according to the characteristics of the test object;

Or alternatively, the first and second heat exchangers may be,

20. The simulation test method of an automotive power line interference source according to any one of claims 1 to 8, wherein:

the simulation parameters include at least one of input voltage, load current, and operating frequency;

The automobile power cord interference source is at least one of an engine control unit, an ignition system and a power window controller.

21. A simulation test device for an automobile power line interference source comprises:

22. A simulation test device for an automobile power line interference source comprises:

A memory configured to store instructions;

A processor configured to execute the instructions to cause the simulation test apparatus of an automotive power line source of interference to implement the simulation test method of an automotive power line source of interference of any one of claims 1-20.

23. A computer readable storage medium storing computer instructions which when executed by a processor implement the method of simulation testing of an automotive power line source of interference of any one of claims 1-20.