CN104392022B - A kind of electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model - Google Patents
A kind of electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model Download PDFInfo
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Abstract
A kind of electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model, the equivalent circuit modeling of electronic equipment front end field structure is carried out first, establish circuit with lumped element model, then the bottom physical circuit modeling of Behavior-based control model is carried out, establish the behavior model of description circuit input/output function characteristic, finally the behavior model of circuit with lumped element model and description circuit input/output function characteristic is integrated, establish the synthesis road level model of electronic equipment, the unified simulation analysis for circuit-level.This invention simplifies the data-interface calculated and when eliminating traditional field road Cooperative Analysis; solve in system and largely accumulate differential equation difficult problems caused by circuit high integration and the high complexity of numerical model analysis; behavior model can also be compatible with circuit model; improve analysis efficiency; the synthetic circuit model commonality of foundation is strong; the parameter of model can be adjusted flexibly according to electronic equipment performance, it is simple easily to realize.
Description
Technical field
The present invention relates to technical field of electromagnetic compatibility, more particularly to a kind of electronic equipment electromagnetic compatibility of Behavior-based control model
Road level comprehensive modeling method.
Background technology
The method that electronic equipment Electro Magnetic Compatibility is modeled and calculated can generally be attributed to two classes：Method and road
Method.To the electronic information of complexity（Such as communication system）For, traditional Modeling Calculation is to use field road Cooperative Analysis
Thinking, as shown in figure 1, the electromagnetic property parameters that electromagnetism farm software calculates transmitting antenna, reception antenna and cable are respectively adopted,
Using circuit simulating software calculus communication system internal circuit（Transmitting terminal includes signal generating circuit, radio-frequency front-end and pair net
Network etc., receiving terminal include matching network, radio-frequency front-end and signal processing circuit etc.）Signal waveform, power, the parameter such as frequency spectrum.
Usually, the result of electromagnetic field analysis time-domain signal that for example port S parameter, impedance parameter, response calculate etc. is, it is necessary to by data
After interface reprocessing, the unified analysis to circuit-level, the calculating of stable state or transient state, time domain or frequency domain is completed in circuit, most
The various electromagnetic interferences such as system signal noise ratio, the bit error rate, wave distortion/disturbed feature is obtained eventually.Therefore, EMC analysis is last
It is the calculating all unified all problems to circuit-level.
In traditional field road Cooperative Analysis, the electromagnetic compatibility model for establishing complex platform electronic equipment still has certain hardly possible
Degree, is mainly reflected in：On the one hand, the analysis of field structure often occurs that size subdivision is complicated, field model calculates and can consumed largely
Computer resource, much more slowly than circuit analysis；On the other hand, with integrated circuit integrated level and the complexity of digital-to-analogue hybrid system
Property rapid raising and ultra-large circuit and chip system development, establish whole system physical circuit model and using imitative
The solutions that true device carries out a large amount of product differential equations are also more and more difficult, and in addition at system design initial stage, equipment component is for technology
Secrecy, the details of bottom physical circuit are not fully known.The EMC analysis of complex platform electronic equipment often by
It is limited to such technical barrier, it is, therefore, desirable to provide a kind of electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model, by field
Structure electromagnetic model is equivalent to circuit model, and bottom physical circuit is equivalent to describe to the behavior mould of input/output function characteristic
Type, and carry out comprehensive modeling and be used for unified circuit-level analysis, it is the protection Design of complex platform inner electronic equipment electromagnetic compatibility
Verified with measures to rectify and reform and effective means is provided.
The content of the invention
The present invention provides a kind of electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model, simplifies meter
Data-interface when calculating and eliminating traditional field road Cooperative Analysis, it is high multiple to solve circuit high integration and numerical model analysis in system
A large amount of product differential equation difficult problems caused by miscellaneous degree, behavior model can also be compatible with circuit model, improves point
Efficiency is analysed, the synthetic circuit model commonality of foundation is strong, the parameter of model can be adjusted flexibly according to electronic equipment performance, simply
Easily realize.
In order to achieve the above object, the present invention provides a kind of electronic equipment electromagnetic compatibility road level synthesis of Behavior-based control model
Modeling method, comprise the steps of：
The equivalent circuit modeling of electronic equipment front end field structure is carried out, establishes circuit with lumped element model；
The bottom physical circuit modeling of Behavior-based control model is carried out, establishes the behavior of description circuit input/output function characteristic
Model；
The behavior model of circuit with lumped element model and description circuit input/output function characteristic is integrated, establishes electricity
The synthesis road level model of sub- equipment, the unified simulation analysis for circuit-level.
Described electronic equipment front end field structure refers to, the input or output of the front end antenna, electronic equipment of electronic equipment
Cable, these electronic equipment front end field structures being capable of electromagnetic signals or the extraneous electromagnetic waves radiated of reception.
Described electronic equipment front end field structure includes the characterisitic parameter of own physical dimensional parameters and external electromagnetic ripple.
Described circuit with lumped element model refers to the equivalent circuit of equivalent lamped element and equivalent signal source composition,
The equivalent circuit can describe the impedance operator of field structure.
Described equivalent lamped element includes the circuit model element not changed with frequency.
Described bottom physical circuit is the remaining circuit structure in addition to the field structure of front end in electronic equipment.
Described behavior model refers to, describes the mathematical modeling of circuit input/output function characteristic, and behavior model meets such as
Lower restriction relation：
（1）
Wherein, x (t) is the input of bottom physical circuit, and y (t) is the output of bottom physical circuit, and h (t) is description bottom
The mathematical function of the input/output function characteristic of physical circuit.
Recognized to obtain the input of description bottom physical circuit according to the input and output experimental data of bottom physical circuit
The mathematical function h (t) of output function characteristic.
Described circuit with lumped element model and the behavior model of description circuit input/output function characteristic integrate
Refer to, the behavior model of circuit with lumped element model and description circuit input/output function characteristic is carried out in circuit analysis software
It is electrically connected with, establishes the unified comprehensive road level model of description electronic equipment electromagnetic compatibility characteristic.
Described synthesis road level model refers to, the theory of circuit analysis and method can be used to complete the model of calculating, and
3 D electromagnetic field structure, electromagnetic property factor without the concern for electronic equipment.
The advantage of the invention is that：
1st, it is the front end field structure progress of electronic equipment is equivalent, it is described with circuit with lumped element, the meter of circuit model
Calculation is faster than electromagnetic field model, and is directly used in the system EMC analysis of electronic equipment, not only simplify calculating and also can also
Omit data-interface during traditional field road Cooperative Analysis.
2nd, bottom physical circuit is integrated and substituted using the behavior model for describing input-output characteristic, solve in system
A large amount of product differential equation difficult problems, behavior model and circuit caused by circuit high integration and the high complexity of numerical model analysis
Model can also be compatible, improves analysis efficiency.
3rd, the synthetic circuit model commonality established is strong, and the parameter of model can be adjusted flexibly according to electronic equipment performance,
It is simple easily to realize.
Brief description of the drawings
Fig. 1 is the field road Cooperative Analysis thinking schematic diagram of traditional transmitting-receiving communication system；
Fig. 2 is the flow chart of the electromagnetic compatibility road level comprehensive modeling method of the Behavior-based control model of the present invention；
Fig. 3 is the behavior model schematic diagram for describing input-output characteristic；
Fig. 4 is ultra-short wave receiver radio system theory diagram in embodiment；
Fig. 5 is the reception antenna equivalent circuit diagram established in embodiment；
Fig. 6 is the behavior model for the description circuit input/output function characteristic established in embodiment.
Fig. 7 is the ultra-short wave receiver radio system electromagnetic compatibility road level collective model established in embodiment.
Embodiment
Below according to Fig. 2~Fig. 7, presently preferred embodiments of the present invention is illustrated.
As shown in Fig. 2 the present invention provides a kind of electronic equipment electromagnetic compatibility road level comprehensive modeling side of Behavior-based control model
Method, comprise the steps of：
Step 1, the equivalent circuit modeling for carrying out electronic equipment front end field structure, establish circuit with lumped element model；
Described electronic equipment front end field structure refers to, the input or output of the front end antenna, electronic equipment of electronic equipment
Cable, these electronic equipment front end field structures being capable of electromagnetic signals or the extraneous electromagnetic waves radiated of reception；
Described electronic equipment front end field structure includes own physical dimensional parameters（Such as length h, radius r etc.）With external world's electricity
The characterisitic parameter of magnetic wave（Such as signal waveform, action time t）；
Described circuit with lumped element model refers to the equivalent circuit of equivalent lamped element and equivalent signal source composition,
The equivalent circuit can describe the impedance operator of field structure；
Described equivalent lamped element includes the circuit model element that resistance, inductance, electric capacity etc. do not change with frequency；
Step 2, the bottom physical circuit modeling for carrying out Behavior-based control model, establish description circuit input/output function characteristic
Behavior model；
Described bottom physical circuit is the remaining circuit structure in addition to the field structure of front end in electronic equipment；
Described behavior model refers to, describes the mathematical modeling of circuit input/output function characteristic, and behavior model is based on
Extraction to bottom physical circuit top-level feature, bottom physical circuit is regarded as mathematical modeling box, ignore bottom physics electricity
The structure and parameter of road inner member, the input and output performance of circuit and the signal coupled relation of intermodule are paid close attention to, while can
Circuit model, such as resistance R are compatible with, is exactly to use relationship in behavior model, is represented simply as voltage and electric current
Linear relationship；As shown in figure 3, bottom physical circuit is regarded as mathematical modeling box by behavior model, wherein, x (t) is bottom thing
The input of circuit is managed, y (t) is the output of bottom physical circuit, and h (t) is that the input/output function of description bottom physical circuit is special
The mathematical function of property, behavior model meet following restriction relation：
（1）
H (t) functions draw, can be according to the details of bottom physical circuit（Details include bottom circuit hand
The parameter listed in volume, the gain compression point of such as nonlinear characteristic, third order intermodulation point of cut-off, temperature memory characteristic）
Go out, identification can also be carried out using the input and output experimental data of bottom physical circuit and drawn, in identification process, when collection
Experimental data is more than the number of parameter to be identified, and the solution of this pure overdetermined problem uses least square method, when ginseng to be identified
When several numbers is more than the experimental data of collection, this pure underdetermined problem uses minimum L2 norms problem solving；
Step 3, by circuit with lumped element model and describe circuit input/output function characteristic behavior model integrated,
Establish the synthesis road level model of electronic equipment, the unified simulation analysis for circuit-level；
Described integrate referring to by circuit model and behavior model, the circuit model and step 2 that will be established in step 1
The behavior model of middle foundation is in circuit analysis software（Such as the ADS softwares, Matlab softwares etc. of Agilent company）It is middle to carry out electricity
Property connection（The output of front end, connect the input of rear end）, establish the unified circuitry for describing electronic equipment electromagnetic compatibility characteristic
Model；
Described synthesis road level model refers to, the theory of circuit analysis and method can be used to complete the model of calculating, and
The factors such as 3 D electromagnetic field structure, electromagnetic property without the concern for electronic equipment.
Application of the present invention in the modeling of ultra-short wave receiver system electromagnetic compatibility is illustrated with one embodiment below, such as schemed
It is the circuit structure diagram of certain ultra-short wave receiver radio system shown in 4, the ultra-short wave receiver radio system includes reception antenna
1, the front-end low-noise for being electrically connected with reception antenna 1 puts 2, is electrically connected with the filtering A modules 3 that front-end low-noise puts 2, is electrically connected with filtering
First frequency mixing module 4 of A modules 3（Input the first local oscillation signal）, the first intermediate frequency filtering mould of the first frequency mixing module 4 of electric connection
Block 5, the first intermediate frequency amplification module 6 of the first intermediate frequency filtering module 5 is electrically connected with, is electrically connected with the first intermediate frequency amplification module 6
Second frequency mixing module 7（Input the second local oscillation signal）, the second intermediate frequency filtering module 8 of the second frequency mixing module 7 of electric connection, electrically
The second intermediate frequency amplification module 9 of the second intermediate frequency filtering module 8 is connected, is electrically connected with the compensation amplification B of the second intermediate frequency amplification module 9
Module 10（Export intermediate-freuqncy signal）.
The major parameter that front-end low-noise puts in 2 is the dB of gain amplifier 8, the dB of noise coefficient 2.8, three rank point of cut-off power 30
dBm；The MHz of frequency 150, the MHz of pass band width 2, the dB of pass band damping 0.3 centered on major parameter in filtering A modules 3, stopband
Decay 30 dB, the MHz of cut off band width 8；Major parameter in first frequency mixing module 4 is the dB of gain 6, the dB of noise coefficient 7, three ranks
The dBm of point of cut-off power 35, the MHz of local frequency 1002.466；Frequency centered on major parameter in first intermediate frequency filtering module 5
852.466 MHz, the MHz of pass band width 10, the dB of pass band damping 0.3, the dB of stopband attenuation 30, the MHz of cut off band width 80；In first
Major parameter in frequency amplification module 6 is the dB of gain 10, the dB of noise coefficient 9.5, the dBm of three rank point of cut-off power 50；Second is mixed
Major parameter in frequency module 7 is the dB of gain 6, the dB of noise coefficient 7, the dBm of three rank point of cut-off power 55, local frequency
836.76 MHz；The MHz of frequency 15.706 centered on major parameter in second intermediate frequency filtering module 8, the kHz of pass band width 68,
With the interior dB of ripple 0.5, the dB of stopband attenuation 20, the kHz of cut off band width 544；Major parameter in second intermediate frequency amplification module 9 is
The dB of gain 25, the dB of noise coefficient 9.5, the dBm of three rank point of cut-off power 40；The major parameter of compensation amplification B modules 10 is gain 32
DB, the dB of noise coefficient 8, the dBm of three rank point of cut-off power 40.
The ultra-short wave receiver system electromagnetic compatibility road level comprehensive modeling of Behavior-based control model is carried out as follows：
Step 1：The equivalent circuit modeling of ultra-short wave receiver system front end field structure is carried out, establishes circuit with lumped element mould
Type；
In this embodiment, ultra-short wave receiver system front end field structure is reception antenna 1, is fed centered on reception antenna 1
Dipole antenna, total length h=1m, radius r=1mm, reception antenna 1 be placed in far field electromagnetic pulse interference irradiation under, electromagnetism
Pulse incident electric fields and antenna angle theta=30o, electromagnetic pulse field strength parameter are：
（2）
In formula：For peak electric field, value 50kV/m；K is correction factor, takes 1.3；α is the parameter for characterizing pulse front edge,
4 × 107s-1 of value；β be characterize pulse back edge parameter, 6 × 108s-1 of value.
In this embodiment, the resistance of reception antenna 1 is described using the circuit being made up of five lamped elements and equivalent voltage source
Anti- characteristic, as shown in figure 5, five lamped elements are the first electric capacity C0, the first inductance L0, the second electric capacity C1, the second inductance L1With
One electric capacity R1, the second electric capacity C1, the second inductance L1With the first electric capacity R1After parallel connection, with the first electric capacity C0With the first inductance L0It is connected on
Equivalent voltage sourceBoth ends, the parameter of five lamped elements see the table below.
Electromagnetic pulse is typically to be produced in high-altitude, can be considered as plane wave when reaching reception system, and electromagnetic pulse is main
Energy is concentrated in relatively low frequency band range, and the electromagnetic wave that reception antenna 1 receives can use equivalent voltage sourceRepresent：
（3）
In formula：For polarizing angle, value is 0o in the present embodiment.
Step 2：The bottom physical circuit modeling of Behavior-based control model is carried out, establishes description circuit input/output function characteristic
Behavior model；
As shown in fig. 6, the behavior model of description circuit input/output function characteristic is established, before the behavior model of foundation includes
LNA 2 is held, is electrically connected with the filtering A modules 3 that front-end low-noise puts 2, is electrically connected with the first frequency mixing module 4 of filtering A modules 3,
The first intermediate frequency filtering module 5 of the first frequency mixing module 4 is electrically connected with, is electrically connected with the first intermediate frequency of the first intermediate frequency filtering module 5
Amplification module 6, the second frequency mixing module 7 of the first intermediate frequency amplification module 6 is electrically connected with, is electrically connected with the of the second frequency mixing module 7
Two intermediate frequency filtering modules 8, the second intermediate frequency amplification module 9 of the second intermediate frequency filtering module 8 is electrically connected with, is electrically connected with the second intermediate frequency
The compensation amplification B modules 10 of amplification module 9.Front-end low-noise is put 2 pairs of signals received and is amplified, in filtering A moulds after amplification
Block 3 is filtered, and is exported and is changed into the first intermediate-freuqncy signal after being mixed into the first frequency mixing module 4 and the first local oscillation signal, in first
Frequency signal enters the first intermediate frequency filtering module 5, the first intermediate frequency amplification module 6 is filtered, amplified, and its output signal enters second
It is changed into the second intermediate-freuqncy signal after the mixing of the local oscillation signal of frequency mixing module 7 and second, the second intermediate-freuqncy signal enters back into the second intermediate frequency filtering
Module 8, the second intermediate frequency amplification module 9 are filtered, amplified, and its output signal obtains after overcompensation amplification B modules 10 are amplified
Final intermediate frequency output, frequency 15.706MHz.
Step 3：The circuit model established in step 1 and step 2 and behavior model are integrated, establish ultrashort wave reception
The synthesis road level model of machine system, the simulation analysis for circuit-level.
The reception antenna equivalent circuit diagram provided according to Fig. 5, the equivalent circuit of field structure is built in circuit simulating software
Model, by equivalent voltage sourceInterference signal is exported, enters ultrashort wave after the equivalent circuit of five lamped element compositions
The radio-frequency head of receiver system；Further according to the theory diagram in Fig. 4, later ultrashort of reception antenna as shown in Figure 6 is established
The behavior model of modules of the wave receiver system in addition to reception antenna 1.Most two parts model is soft in circuit simulation at last
Integrated in part, establish electromagnetic compatibility road level collective model as shown in Figure 7, circuit analysis will be directly used in, complete stable state
Or the calculating of transient state, time domain or frequency domain, finally give various electromagnetic interferences such as system signal noise ratio, the bit error rate, wave distortion/disturbed
Feature, so as to predict or assess the Electro Magnetic Compatibility of the receiver system under Electromagnetic Radiation.
The advantage of the invention is that：
1st, it is the front end field structure progress of electronic equipment is equivalent, it is described with circuit with lumped element, the meter of circuit model
Calculation is faster than electromagnetic field model, and is directly used in the system EMC analysis of electronic equipment, not only simplify calculating and also can also
Omit data-interface during traditional field road Cooperative Analysis.
2nd, bottom physical circuit is integrated and substituted using the behavior model for describing input-output characteristic, solve in system
A large amount of product differential equation difficult problems, behavior model and circuit caused by circuit high integration and the high complexity of numerical model analysis
Model can also be compatible, improves analysis efficiency.
3rd, the synthetic circuit model commonality established is strong, and the parameter of model can be adjusted flexibly according to electronic equipment performance,
It is simple easily to realize.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. a kind of electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model, it is characterised in that comprising following
Step：
The equivalent circuit modeling of electronic equipment front end field structure is carried out, establishes circuit with lumped element model；
The bottom physical circuit modeling of Behavior-based control model is carried out, establishes the behavior mould of description circuit input/output function characteristic
Type；
The behavior model of circuit with lumped element model and description circuit input/output function characteristic is integrated, electronics is established and sets
Standby synthesis road level model, the unified simulation analysis for circuit-level；
Wherein, described electronic equipment front end field structure refers to, the input or output of the front end antenna, electronic equipment of electronic equipment
Cable, these electronic equipment front end field structures being capable of electromagnetic signals or the extraneous electromagnetic waves radiated of reception；
Described circuit with lumped element model refers to the equivalent circuit of equivalent lamped element and equivalent signal source composition, such
Effect circuit can describe the impedance operator of field structure；
Described bottom physical circuit is the remaining circuit structure in addition to the field structure of front end in electronic equipment；
Described behavior model refers to, describes the mathematical modeling of circuit input/output function characteristic, and behavior model meets as follows about
Beam relation：
Y (t)=x (t) h (t)；
Wherein, x (t) is the input of bottom physical circuit, and y (t) is the output of bottom physical circuit, and h (t) is description bottom physics
The mathematical function of the input/output function characteristic of circuit.
2. the electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model as claimed in claim 1, its feature
It is, described electronic equipment front end field structure includes the characterisitic parameter of own physical dimensional parameters and external electromagnetic ripple.
3. the electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model as claimed in claim 1, its feature
It is, described equivalent lamped element includes the circuit model element not changed with frequency.
4. the electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model as claimed in claim 1, its feature
It is, is recognized to obtain the input and output of description bottom physical circuit according to the input and output experimental data of bottom physical circuit
The mathematical function h (t) of functional characteristic.
5. such as the electronic equipment electromagnetic compatibility road level comprehensive modeling of Behavior-based control model any one of in claim 1-4
Method, it is characterised in that described circuit with lumped element model and the behavior model of description circuit input/output function characteristic enter
Row synthesis refers to, the behavior model of circuit with lumped element model and description circuit input/output function characteristic is soft in circuit analysis
It is electrically connected with part, establishes the unified comprehensive road level model of description electronic equipment electromagnetic compatibility characteristic.
6. the electronic equipment electromagnetic compatibility road level comprehensive modeling method of Behavior-based control model as claimed in claim 5, its feature
It is, described synthesis road level model refers to, the model for completing to calculate using the theory and method of circuit analysis, without examining
Consider 3 D electromagnetic field structure, the electromagnetic property factor of electronic equipment.
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| CN105302958B (en) * | 2015-10-28 | 2018-05-29 | 北京交通大学 | The method for building up of the system-level electromagnetic compatibility model of bullet train |
| CN106021727B (en) * | 2016-05-19 | 2020-01-10 | 北京航空航天大学 | Equivalent multiport-based electromagnetic characteristic analysis method for radio frequency comprehensive module |
| CN106126804A (en) * | 2016-06-21 | 2016-11-16 | 上海无线电设备研究所 | The behavioral scaling modeling of a kind of power amplifier bottom circuit and verification method |
| CN106055845A (en) * | 2016-07-07 | 2016-10-26 | 中国人民解放军国防科学技术大学 | Electromagnetic compatibility modeling method |
| CN112180179B (en) * | 2020-10-10 | 2022-10-28 | 中车青岛四方机车车辆股份有限公司 | Electromagnetic compatibility analysis method and device |
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| CN101714184A (en) * | 2009-11-20 | 2010-05-26 | 北京航空航天大学 | Behavioral level modeling system for circuit board level electromagnetic compatible sensitivity |
| CN103488840A (en) * | 2013-09-27 | 2014-01-01 | 中国东方电气集团有限公司 | System and method for modeling printed circuit board level conducted electromagnetic interference |
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| JP3988623B2 (en) * | 2002-11-08 | 2007-10-10 | 株式会社日立製作所 | Electronic circuit characteristic analysis computer program and characteristic analysis method |
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| CN101714184A (en) * | 2009-11-20 | 2010-05-26 | 北京航空航天大学 | Behavioral level modeling system for circuit board level electromagnetic compatible sensitivity |
| CN103488840A (en) * | 2013-09-27 | 2014-01-01 | 中国东方电气集团有限公司 | System and method for modeling printed circuit board level conducted electromagnetic interference |
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