CN103455680B - Intra system electromagnetic com patibility hypothesis analysis system and analytical approach - Google Patents
Intra system electromagnetic com patibility hypothesis analysis system and analytical approach Download PDFInfo
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Abstract
In present system, EMC prediction analytic system and method, comprise two large divisions, and Part I is input and initialization section, mainly completes the generation of file in the input of Prediction Parameters, frequency spectrum data and system and the foundation of cable topological diagram; Part II is prediction task analysis module, and the main a series of data files combining input and generate with initialization module, complete EMC index and generate and EMI evaluation and analysis function.Electromagnetic Compatibility Prediction analytic system of the present invention has broken technical monopoly, provides a kind of new System and method for make the EMC analysis of equipment more convenient.Electromagnetic Compatibility Prediction analytical approach of the present invention guarantees its Electro Magnetic Compatibility as much as possible within the whole lead time and even whole life cycle of system.In system development cycle, realize system EMI assessment and trade-off analysis, in system Life cycle, provide cost-effective technological means, the electromagnetic compatibility of the system that realizes of maximum possible.
Description
Technical field
The present invention relates to a kind of intra system electromagnetic com patibility hypothesis analysis system and method.
Background technology
Namely be subject to the attention of World Developed Countries since Electromagnetic Compatibility Prediction technological invention and be developed application.Phase late 1960s Electromagnetic Compatibility Prediction technology is first studied in the U.S., and the seventies is developed rapidly.At that time, very active in the Study and Development, Aerospace Engineering application practice etc. of the research of mathematical prediction model, application software.According to data introduction, to the beginning of the seventies, form complete systematic analytic method abroad, develop some system-level (comprising between system with in system) Electromagnetic Compatibility Prediction routine analyzers targetedly, wherein, the most famous is exactly that USAF entrusts rom Centre d'Etudes de la Navigation Aerienne EMC analysis program (IEMCAP) in the system of development in 1972, and its major function carries out Electromagnetic Compatibility Prediction assessment for aeronautics and space aerocraft system.IEMCAP software, in conjunction with the own characteristic of aerospace vehicle system, establishes perfect EMC interference source, sensor, coupling path and system model (as EMC index produces, EMC trade-off analysis etc.), can carry out EMC forecast assessment.Polytype airplane design checking, regrettably, this software is still embargoed Chinese trade at present.
Except the IEMCAP of the U.S., the system-level EMC forecast analysis software EMCAnalyzer of Byelorussia is also a system-level EMC prediction assessment software equally, its function and IEMCAP similar, also mainly for the system-level EMC prediction assessment software of carrier-borne, airborne, spaceborne and terrestrial weapon system.EMCAnalyzer sells China at present, but its price is very expensive, is about hundreds of thousands dollar.
Although IEMCAP and EMCAnalyzer software is system-level EMC prediction assessment software, it all designs for aircraft or naval vessel at first, and in software, Most models is all set up in conjunction with aircraft or naval vessel.
China is more late to system-level Electromagnetic Compatibility Prediction analysis and research.From nineteen nineties, more domestic institution of higher learning and scientific research institutions as BJ University of Aeronautics & Astronautics, University of Electronic Science and Technology, the Second Academy of Aerospace Machinery and Electronics Corporation, total 701 institutes of middle ship, institute of Zhong electricity group 10 and Zhong electricity group 28 wait and progressively carried out the research of Electromagnetic Compatibility Prediction analytical technology.For some concrete system (as aircraft, naval vessel and radar etc.), work out partial predictive analysis software.The a set of EMC prediction software BHEMCAP for aircraft developed the beginning of the nineties as BJ University of Aeronautics & Astronautics it be made up of five major parts: (1) overall aircraft module, it is the graphical module describing overall aircraft topology layout; (2) antenna is to antenna prediction module, is used for analyzing antenna to the interference between antenna; (3) cable couples prediction module, to be used for analyzing in cable wire to the coupled interference between wire; (4) electromagnetic field is to inboard installation coupled interference prediction module, is used for the electromagnetic wave of analysis of aircraft antenna radiates to the interference of inboard installation.(5) airborne equipment prediction module, is used for analyzing the interference between the equipment in the section of same cabin.Other softwares also have " the aerospace system EMC system interior prediction common software-EMCLAB_INTRA of the Second Academy of space flight main office organization development.
To sum up, mainly there is following shortcoming in existing electromagnetic compatibility analysis system:
1, be monopolization technology within the specific limits, and expensive;
2, be directed to specific object to develop, lack general applicability;
3, system design stage is mainly used in.
Summary of the invention
Lacking and the technical matters of narrow application range for solving EMC prediction system in existing system, the invention provides EMC prediction analytic system in a kind of system.
Concrete solution of the present invention is as follows:
EMC prediction analytic system in a kind of system, its special character is: comprise two large divisions, and Part I is input and initialization section, and Part II is prediction task analysis part;
Described input and initialization section comprise data input module, spectral model, cable module, initialization process module,
Each port data that each device data that data comprise each subsystem data, subsystem comprises of described data input module input, equipment comprise and cable bundle topological diagram data,
Described port data comprise the sampling frequency of port, the ambient trace of the electromagnetic environment residing for port, emission port and receiving port have a mind to frequency spectrum, emission port and receiving port frequency spectrum, emission port and receiving port unintentionally the index of the Raw performance of initial spectrum displacement factor, emission port and receiving port, emission port and receiving port adjust the margin of safety of limit value, receiving port;
Described Raw performance is added by model curve or does not add the spectrum offset factor and formed, and described model curve refers to the curve that each sampling frequency of port is formed with corresponding level,
Described cable bundle topological diagram data comprise the data of point, section, road three types, and described point refers to the position coordinates of single port, described section comprises the position coordinates of two points forming section, described road comprises the multiple points forming road position coordinates and communications cable type and parameter;
Described spectrum block provides data model for each port, and user provides parameter according to the requirement of data model when data input;
Described initialization process module can be data input module provides inputting interface, can call model algorithm in spectrum block and adjust limit value according to the initial spectrum displacement factor of port and index to generate spectrum curve; The cable bundle topological diagram data inputted in data input module can be supplied to cable module; The data inputted in data input module can be preserved with document form, the file that reading and saving is crossed;
The cable bundle topological diagram data that described cable module is used for initialization process module to provide carry out figure display, and the data on the point in display graphics, section, road are carried out preservation formation cable bundle file;
Described prediction task analysis part comprises task analysis module, EMC index generation module, EMI comparative analysis module, coupling path computing module, mode module;
Described mode module comprises antenna-coupled module, line line coupling module, field wire coupling module, common-impedance coupling module, housing housing coupling module;
Described coupling path module is used for calling arbitraryly in cable bundle file judging system whether there is coupling path between sending and receiving port, if existed, applies corresponding mode module and calculates this power transmission factor to sending and receiving port public frequency;
Described analysis and frequency spectrum adjusting module adopt port frequency spectrum data and power transmission factor to calculate jamming power and the EMI interference margins of receiving port;
Described EMC index generation module calls the generation index analyzed and be not intended to frequency spectrum with frequency spectrum adjusting module for adjusting port, makes it meet the setting range of Raw performance and the restriction of index adjustment limit value;
Described EMI comparative analysis module comprises primal system EMI evaluation module and EMI trade-off analysis module, primal system EMI evaluation module can carry out analytical calculation to the EMC safety allowance between transmitting-receiving ports all in original system pair, and for each receiving port, consider all emission ports and environment field, calculate the EMI interference margins of total received power
Described primal system EMI evaluation module calls to analyze to calculate jamming power that each receiving port and emission port produce with frequency spectrum adjusting module and carry out superposing and obtains total jamming power and the EMC safety allowance in total jamming power lower port;
The data of obtained calculating data and primal system for calculating the EMI interference margins after amendment between system middle port pair, and contrast by described EMI trade-off analysis module, and the disturbance regime exported under two states carries out EMC balance design reference for user.
Also comprise EMC index processing module, the EMC index that described EMC index processing module is used for generating stores to facilitate follow-up calling.
A prediction analysis method for intra system electromagnetic com patibility, its special character is: comprise the following steps:
1] related data of system to be analyzed is obtained;
Each port data that each device data that data comprise each subsystem data, subsystem comprises, equipment comprise and cable bundle topological diagram data,
Described port data comprise the sampling frequency of port, the ambient trace of the electromagnetic environment residing for port, emission port and receiving port have a mind to frequency spectrum, emission port and receiving port frequency spectrum, emission port and receiving port unintentionally the index of the Raw performance of initial spectrum displacement factor, emission port and receiving port, emission port and receiving port adjust the margin of safety of limit value, receiving port;
Described cable bundle topological diagram data comprise the data of point, section, road three types, and described point refers to the flex point of the position coordinates of single port and wire harness, described section comprises the position coordinates of two points forming section, described road comprises the multiple points forming road position coordinates and communications cable type and parameter;
2] adjust the Raw performance that port is not intended to frequency spectrum, obtain EMC and generate index, concrete steps are as follows:
2.1] for sending and receiving port pair arbitrary in system, judge whether there is coupling path between them, if existed, apply corresponding mode module and calculate this power transmission factor to sending and receiving port public frequency;
2.2] Raw performance and the step 2.1 of emission port is adopted] the middle power transmission factor calculated calculates the signal level being coupled to receiving port;
2.3] this signal level and receiving port susceptibility level are compared, in considered frequency range, if received signal level has exceeded the susceptibility level of receiving port, then reduce the launching electrical level of the corresponding frequency of emission port until safety allowance meets the adjustment limit that requirement that user specifies or decrease arrive regulation;
The susceptibility of described receiving port comprises the frequency spectrum intentionally of receiving port and the frequency spectrum unintentionally of receiving port;
2.4] for each receiving port, select all and there is the emission port of coupling path between it, according to step 2.1,2.2] method, utilize the spectrum value of the emission port after adjustment to calculate the total power signal being coupled to this receiving port;
2.5] the susceptibility level of this general power and receiving port is compared, if exceed susceptibility level, that then improves this receiving port is not intended to r level until safety allowance meets the demands or limit value adjustment amount arrives the adjustment limit, emission port and receiving port be not intended to after frequency spectrum adjusted, just obtain one group of new EMC index;
3] EMI evaluation and analysis is carried out to system to be analyzed, specifically comprises the following steps:
3.1] for sending and receiving port pair arbitrary in system, in considered frequency range, judge whether the EMC safety allowance of this sending and receiving port is less than the margin of safety of the given port of user;
According to result of calculation, the electromagnetic compatibility situation between display transmitting-receiving port, namely safety allowance is less than margin of safety, emission port interference receiving port; Safety allowance is greater than margin of safety, and emission port does not disturb receiving port;
If EMC safety allowance minimum value is less than the given security of system nargin of user in considered frequency range, this is output the EMI situation between sending and receiving port;
3.2] simultaneously, for each receiving port, consider all emission port power Overlays, obtain the situation whether receiving port is disturbed;
3.3] analysis is compared by what revise the electromagnetic interference (EMI) situation of system and original system, thus the impact that assessment brings system EMC because of factors such as antenna changes, cable change, the adjustment of port frequency spectrum, provide foundation for realizing system EMC balance design.
Above-mentioned steps 2] in mode module comprise antenna-coupled module, line line coupling module, field wire coupling module, common-impedance coupling module, housing housing coupling module.
If analyze system for the first time, step 1] in data need to input, if not Primary Assay, the related data information of system stored before can calling.
Beneficial aspects of the present invention:
1, Electromagnetic Compatibility Prediction analytic system of the present invention has broken technical monopoly, provides a kind of new System and method for make the EMC analysis of equipment more convenient.
2, Electromagnetic Compatibility Prediction analytic system in present system, can carry out graphic software platform by the file of input system, facilitate designer to adjust system.
3, in present system, Electromagnetic Compatibility Prediction analytical approach can according to low volume datas such as basic input, output and the installation sites in total system at the conceptual phase of system development, suitable EMC index is proposed to subsystem each in system or equipment, avoids the deficient design of system or cross design.Along with the progress of system development, can carry out upgrading and adjust to EMC index according to grasped system data specifically, within the whole lead time and even whole life cycle of system, guarantee its Electro Magnetic Compatibility as much as possible.In system development cycle, realize system EMI assessment and trade-off analysis, in system Life cycle, provide cost-effective technological means, the electromagnetic compatibility of the system that realizes of maximum possible.
Accompanying drawing explanation
Fig. 1 is EMC hypothesis analysis system process flow diagram in system;
Fig. 2 is the process flow diagram of prediction task analysis module;
Fig. 3 is that EMC index generates process flow diagram;
Fig. 4 is EMI evaluation and analysis block flow diagram.
Embodiment
In system, EMC prediction software flow as shown in Figure 1, is divided into two large comprising modules: Part I is input and initialization module, mainly completes the generation of file in the input of Prediction Parameters, frequency spectrum data and system and the foundation of cable topological diagram; Part II is prediction task analysis module, and the main a series of data files combining input and generate with initialization module, complete EMC index and generate and EMI evaluation and analysis function.
Input is the standardization processing of system being carried out to data input with the major function of initialization module, data can be carried out classifying according to subsystem data, device data, port data etc. and define parameter and the data layout of Various types of data, the task analysis for next step provides data basis.
System to be analyzed can be new system, also can be old system, can also revise for system, and for these three kinds of different situations, input data obtain from three kinds of approach respectively.The data of new system are all provided by data input module, and old system from all data of file acquisition in old system, and can be revised for system, and its data are based on the data of old ISF, and adopt PIF file data to upgrade it.Input and initialization section mainly comprise following four modules: data input module, spectral model, cable module, initialization process module, Fig. 1 gives the major function of the input pie graph total with initialization section and each comprising modules, and input is described in detail as follows with initialization section:
Each port data that each device data that data comprise each subsystem data, subsystem comprises of data input module input, equipment comprise and cable bundle topological diagram data.
Port data comprises the sampling frequency of port, the ambient trace of the electromagnetic environment residing for port, the frequency spectrum intentionally of emission port and receiving port, the frequency spectrum unintentionally of emission port and receiving port, emission port and receiving port initial spectrum displacement factor, the Raw performance of emission port and receiving port, the index of emission port and receiving port adjusts limit value, the margin of safety of receiving port, described Raw performance is added by model curve or does not add the spectrum offset factor and formed, described model curve refers to the curve that each sampling frequency of port is formed with corresponding level.
Cable bundle topological diagram data comprise the data of point, section, road three types, and the position coordinates that point refers to the position coordinates of single port, section comprises two points forming section, road comprise the position coordinates of the multiple points forming road and communications cable type and parameter.
Spectrum block provides data model for each port, and user provides parameter according to the requirement of data model when data input.
Initialization process module can be data input module and provides inputting interface, can call model algorithm in spectrum block and adjust limit value according to the initial spectrum displacement factor of port and index to generate spectrum curve; The cable bundle topological diagram data inputted in data input module can be supplied to cable module; The data inputted in data input module can be preserved with document form, the file that reading and saving is crossed.
The cable bundle topological diagram data that cable module is used for initialization process module to provide carry out figure display, and the data on the point in display graphics, section, road are carried out preservation formation cable bundle file.
Prediction task analysis part mainly completes the forecast analysis of appointed task, and its total formation and function are as shown in Figure 2.Task analysis module is reading system data and operational factor from the file that input and initialization module produce, and then enters task choosing.Its composition comprises EMC index generation module, EMI comparative analysis module, coupling path computing module, mode module.Achievable prediction task comprises two classes: EMC index generates and EMI evaluation and analysis.
Mode module comprises antenna-coupled module, line-line coupling module, field-line coupling module, common-impedance coupling module, housing-housing coupling module.
Coupling path computing module is used for calling arbitraryly in cable bundle file judging system whether there is coupling path between sending and receiving port, if existed, applies corresponding mode module and calculates this power transmission factor to sending and receiving port public frequency.
Analyze and adopt port frequency spectrum data and power transmission factor to calculate jamming power and the EMI interference margins of receiving port with frequency spectrum adjusting module.
EMC index generation module calls the generation index analyzed and be not intended to frequency spectrum with frequency spectrum adjusting module for adjusting port, makes it meet the setting range of Raw performance and the restriction of index adjustment limit value.
In order to store to facilitate follow-up calling to the EMC index generated, EMC index processing module can be added in systems in which.
EMI comparative analysis module comprises primal system EMI evaluation module and EMI trade-off analysis module, primal system EMI evaluation module can carry out analytical calculation to the EMC safety allowance between transmitting-receiving ports all in original system pair, and for each receiving port, consider all emission ports and environment field, calculate the EMI interference margins of total received power.
Primal system EMI evaluation module calls to analyze to calculate jamming power that each receiving port and emission port produce with frequency spectrum adjusting module and carry out superposing and obtains total jamming power and the EMC safety allowance in total jamming power lower port.
As shown in Figure 3, when analyzing, in system, the non-hope transmitting of each port or response all adopt Raw performance, for each exist coupling path send out-receiving end mouth is right, the Raw performance value of emission port hypothesis is adopted to calculate the signal level being coupled to receiving port, and the susceptibility level that this signal level and receiving port are supposed is compared, in considered frequency range, if received signal level has exceeded the susceptibility level of receiving port, then reduce the launching electrical level of the corresponding frequency of emission port until margin of safety meets the adjustment limit that requirement that user specifies or decrease arrive regulation.
After each emission port in system and receiving port carry out combining and complete the adjustment of the non-hope transmitting of all emission ports, program adjusts the non-hope response spectra of receiving port further.
For each receiving port, consider all and between it, there is the emission port of coupling path, spectrum value after adopting these emission ports to adjust calculates the total power signal being coupled to this receiving port, the susceptibility level of this general power and receiving port is compared, if exceed susceptibility level, then that improves this receiving port is not intended to r level until margin of safety meets the demands or limit value adjustment amount arrives the adjustment limit.
Emission port and receiving port be not intended to after frequency spectrum adjust, just obtain one group of new EMC index, if EMI and EMC of equipment is all no more than this index in system, then as much as possible guarantee system electromagnetic compatibility.Certainly, after completing the adjustment of EMC index, still may some port to there is EMI, these hope usually deriving from port are launched and response, or the non-hope transmitting of not adjusting to the right place and response because being adjusted ultimate value impact.After the adjustment that hits the target, these indexs are adjusted insurmountable EMI and exports to user.
EMI evaluation and analysis module is the instrument of object EMC design and study more than.This module can be used for assessing the EMI in original system, point impact that factorial system amendment (comprising the interpolation of subsystem, equipment and port or the amendment etc. in amendment and path) is brought system EMC, provides data foundation for system EMC weighs design.
As shown in Figure 4, EMI evaluation and analysis module mainly comprises two parts function:
Primal system EMI assesses and EMI trade-off analysis.Primal system EMI assesses and can carry out analytical calculation to the EMC safety allowance between transmitting-receiving ports all in original system pair, and for each receiving port, consider all emission ports and environment field, calculate the EMI interference margins of total received power, the data that calculating obtains are stored in permanent file (BTF, TheBaselineTransferFile), for next step EMI trade-off analysis provides input.EMI trade-off analysis calculates the EMI interference margins after amendment between system middle port pair, and the data of the primal system stored in obtained calculating data and BTF are contrasted, the disturbance regime exported under two states carries out EMC for user and weighs design reference.
Claims (5)
1. an EMC prediction analytic system in system, is characterized in that: comprise two large divisions, and Part I is input and initialization section, and Part II is prediction task analysis part;
Described input and initialization section comprise data input module, spectrum block, cable module, initialization process module;
Each port data that each device data that data comprise each subsystem data, subsystem comprises of described data input module input, equipment comprise and cable bundle topological diagram data;
Described port data comprise the sampling frequency of port, the ambient trace of the electromagnetic environment residing for port, emission port and receiving port have a mind to frequency spectrum, emission port and receiving port frequency spectrum, emission port and receiving port unintentionally the index of the Raw performance of initial spectrum displacement factor, emission port and receiving port, emission port and receiving port adjust the margin of safety of limit value, receiving port;
Described Raw performance is added by model curve or does not add the spectrum offset factor and formed, and described model curve refers to the curve that each sampling frequency of port is formed with corresponding level;
Described cable bundle topological diagram data comprise the data of point, section, road three types, and described point refers to the position coordinates of single port, described section comprises the position coordinates of two points forming section, described road comprises the multiple points forming road position coordinates and communications cable type and parameter;
Described spectrum block provides data model for each port, and user provides parameter according to the requirement of data model when data input;
Described initialization process module can be data input module provides inputting interface, can call model algorithm in spectrum block and adjust limit value according to the initial spectrum displacement factor of port and index to generate spectrum curve; The cable bundle topological diagram data inputted in data input module can be supplied to cable module; The data inputted in data input module can be preserved with document form, the file that reading and saving is crossed;
The cable bundle topological diagram data that described cable module is used for initialization process module to provide carry out figure display, and the data on the point in display graphics, section, road are carried out preservation formation cable bundle file;
Described prediction task analysis part comprises task analysis module, EMC index generation module, EMI comparative analysis module, coupling path computing module, mode module;
Described mode module comprises antenna-coupled module, line line coupling module, field wire coupling module, common-impedance coupling module, housing housing coupling module;
Described coupling path computing module is used for calling arbitraryly in cable bundle file judging system whether there is coupling path between sending and receiving port, if existed, applies corresponding mode module and calculates this power transmission factor to sending and receiving port public frequency;
Described analysis and frequency spectrum adjusting module adopt port frequency spectrum data and power transmission factor to calculate jamming power and the EMI interference margins of receiving port;
Described EMC index generation module calls the generation index analyzed and be not intended to frequency spectrum with frequency spectrum adjusting module for adjusting port, makes it meet the setting range of Raw performance and the restriction of index adjustment limit value;
Described EMI comparative analysis module comprises primal system EMI evaluation module and EMI trade-off analysis module;
Described primal system EMI evaluation module calls to analyze to calculate jamming power that each receiving port and emission port produce with frequency spectrum adjusting module and carry out superposing and obtains total jamming power and the EMC safety allowance in total jamming power lower port;
The data of obtained calculating data and primal system for calculating the EMI interference margins after amendment between system middle port pair, and contrast by described EMI trade-off analysis module, and the disturbance regime exported under two states carries out EMC balance design reference for user.
2. EMC prediction analytic system in system according to claim 1, is characterized in that: also comprise EMC index processing module, and the EMC index that described EMC index processing module is used for generating stores to facilitate follow-up calling.
3. a prediction analysis method for intra system electromagnetic com patibility, is characterized in that: comprise the following steps:
1] related data of system to be analyzed is obtained;
Each port data that each device data that data comprise each subsystem data, subsystem comprises, equipment comprise and cable bundle topological diagram data,
Described port data comprise the sampling frequency of port, the ambient trace of the electromagnetic environment residing for port, emission port and receiving port have a mind to frequency spectrum, emission port and receiving port frequency spectrum, emission port and receiving port unintentionally the index of the Raw performance of initial spectrum displacement factor, emission port and receiving port, emission port and receiving port adjust the margin of safety of limit value, receiving port;
Described cable bundle topological diagram data comprise the data of point, section, road three types, and described point refers to the flex point of the position coordinates of single port and wire harness, described section comprises the position coordinates of two points forming section, described road comprises the multiple points forming road position coordinates and communications cable type and parameter;
2] adjust the Raw performance that port is not intended to frequency spectrum, obtain EMC and generate index, concrete steps are as follows:
2.1] for sending and receiving port pair arbitrary in system, judge whether there is coupling path between them, if existed, apply corresponding mode module and calculate this power transmission factor to sending and receiving port public frequency;
2.2] Raw performance and the step 2.1 of emission port is adopted] the middle power transmission factor calculated calculates the signal level being coupled to receiving port;
2.3] this signal level and receiving port susceptibility level are compared, in considered frequency range, if received signal level has exceeded the susceptibility level of receiving port, then reduce the launching electrical level of the corresponding frequency of emission port until safety allowance meets the adjustment limit that requirement that user specifies or decrease arrive regulation;
The susceptibility of described receiving port comprises the frequency spectrum intentionally of receiving port and the frequency spectrum unintentionally of receiving port;
2.4] for each receiving port, select all and there is the emission port of coupling path between it, according to step 2.1,2.2] method, utilize the spectrum value of the emission port after adjustment to calculate the total power signal being coupled to this receiving port;
2.5] the susceptibility level of this general power and receiving port is compared, if exceed susceptibility level, that then improves this receiving port is not intended to r level until safety allowance meets the demands or limit value adjustment amount arrives the adjustment limit, emission port and receiving port be not intended to after frequency spectrum adjusted, just obtain one group of new EMC index;
3] EMI evaluation and analysis is carried out to system to be analyzed, specifically comprises the following steps:
3.1] for sending and receiving port pair arbitrary in system, in considered frequency range, judge whether the EMC safety allowance of this sending and receiving port is less than the margin of safety of the given port of user;
According to result of calculation, the electromagnetic compatibility situation between display transmitting-receiving port, namely safety allowance is less than margin of safety, emission port interference receiving port; Safety allowance is greater than margin of safety, and emission port does not disturb receiving port;
If EMC safety allowance minimum value is less than the given security of system nargin of user in considered frequency range, this is output the EMI situation between sending and receiving port;
3.2] simultaneously, for each receiving port, consider all emission port power Overlays, obtain the situation whether receiving port is disturbed;
3.3] analysis is compared by what revise the electromagnetic interference (EMI) situation of system and original system, thus the impact that assessment brings system EMC because of factors such as antenna changes, cable change, the adjustment of port frequency spectrum, provide foundation for realizing system EMC balance design.
4. the prediction analysis method of intra system electromagnetic com patibility according to claim 3, is characterized in that: described step 2] in mode module comprise antenna-coupled module, line line coupling module, field wire coupling module, common-impedance coupling module, housing housing coupling module.
5. the prediction analysis method of the intra system electromagnetic com patibility according to claim 3 or 4, it is characterized in that: if analyze system for the first time, step 1] in data need to input, if not Primary Assay, the related data information of system stored before can calling.
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Denomination of invention: Prediction analysis system and analysis method for EMC (Electro Magnetic Compatibility) in system Effective date of registration: 20171108 Granted publication date: 20160427 Pledgee: Bank of Xi'an Limited by Share Ltd West Branch Pledgor: Shaanxi Hitech Electronic Co., Ltd. Registration number: 2017610000140 |