CN111737885A - Complex wire harness electromagnetic coupling effect analysis method and device - Google Patents
Complex wire harness electromagnetic coupling effect analysis method and device Download PDFInfo
- Publication number
- CN111737885A CN111737885A CN202010782244.5A CN202010782244A CN111737885A CN 111737885 A CN111737885 A CN 111737885A CN 202010782244 A CN202010782244 A CN 202010782244A CN 111737885 A CN111737885 A CN 111737885A
- Authority
- CN
- China
- Prior art keywords
- wire harness
- wires
- wire
- complex
- analyzed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/16—Cables, cable trees or wire harnesses
Abstract
The application relates to a method and a device for analyzing electromagnetic coupling effect of a complex wire harness. The method comprises the following steps: acquiring a wire harness parameter of a complex wire harness to be analyzed; calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires; generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire; determining the equivalent radius of the complex wire harness to be analyzed equivalent to the single wire harness model according to the cascade uniform section and the equivalent inductance matrix, and determining the ground height of the single wire harness model according to the distance between the wire and the ground height; and analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model. By adopting the method, the calculation efficiency of the electromagnetic coupling effect analysis of the complex wire harness can be improved.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a method and a device for analyzing electromagnetic coupling effect of a complex wire harness.
Background
For the theoretical research of complex wire harness EMC, the existing achievements mostly utilize a multi-conductor transmission line method to perform mechanism analysis. Compared with numerical simulation, the multi-conductor transmission line method has computational advantages, but the assumption that only transverse electric waves are transmitted needs to be met, which limits the application of the multi-conductor transmission line method in the analysis of electromagnetic compatibility problems. Therefore, for the problem of EMC of the complex wire harness, the numerical simulation method is widely applied to the analysis of the problem of electromagnetic compatibility of the complex wire harness, but the method needs to establish an accurate electromagnetic compatibility model of the wire harness. However, for electromagnetic compatibility modeling of complex wire harnesses in electronic systems such as automobiles, airplanes and naval vessels, the numerical simulation of a complete wire harness model has very strict requirements on modeling and computing capabilities, and even the electromagnetic compatibility analysis of the whole wire harness cannot be performed. Therefore, a more efficient modeling approach is needed to solve the problem of electromagnetic compatibility modeling of complex wire bundles.
The simplified modeling method of the wire harness is a modeling method for simplifying a plurality of leads into not more than 4 leads, and has important significance for establishing a complex wire harness electromagnetic compatibility model. On the premise of ensuring the calculation precision, the method can effectively reduce the modeling difficulty of the complex wire harness and greatly improve the calculation efficiency. However, the existing simplified modeling method for the wiring harness mainly aims at deterministically arranging the wiring harness, and does not consider the change of the relative position between the wiring harnesses. In the practical application process, the cable bundle often has randomness in the wiring process, so that the electromagnetic coupling analysis is inaccurate.
Disclosure of Invention
In view of the above, it is necessary to provide a complicated beam electromagnetic coupling effect analysis method and apparatus capable of analyzing the inaccurate problem of electromagnetic coupling.
A method of analyzing complex wire harness electromagnetic coupling effects, the method comprising:
acquiring a wire harness parameter of a complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model, and determining the ground height of the single wire harness model according to the height of the wire from the ground;
and analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
In one embodiment, the method further comprises the following steps: calculating the unit inductance matrix of the complex wire harness according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires as follows:
wherein the content of the first and second substances,
representing the unity inductance matrix between conductor i and conductor j,
and
indicating the height of wires i and j from the ground,
and
respectively representing the wire radii of wire i and wire j,
representing the wire distance between wires; calculating an equivalent inductance matrix of the complex wire harness according to the number of the leads and the unit inductance matrix as follows:
wherein the content of the first and second substances,
representing the equivalent inductance matrix and n representing the number of conductors.
In one embodiment, the method further comprises the following steps: generating a random position of the complex wire harness to be analyzed, which meets Gaussian distribution, according to the starting point and the end point of the wire in the complex wire harness to be analyzed; obtaining numerical points through spline interpolation according to the random positions; and obtaining a cascade uniform section by adopting a multi-time spline interpolation mode according to the numerical value points.
In one embodiment, the method further comprises the following steps: according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model as follows:
wherein the content of the first and second substances,
which represents the equivalent radius of the beam,
which represents an equivalent inductance matrix of the inductor,
the magnetic permeability in a vacuum is shown,
refers to a single beam dieThe height of the profile from the ground.
In one embodiment, the method further comprises the following steps: determining the ground height of the single wire harness model according to the wire distance to the ground height as follows:
wherein the content of the first and second substances,
indicating the height of the wire from the ground.
In one embodiment, the method further comprises the following steps: when the wire in the complex wire bundle to be analyzed wraps the insulating layer, determining the capacitance parameter of the wire in unit length as follows:
wherein the content of the first and second substances,
represents a capacitance parameter, and:
wherein the content of the first and second substances,
which represents the relative dielectric constant of the material,
，
which represents the dielectric constant of the glass substrate,
and
both represent the insulating layer thickness.
In one embodiment, the method further comprises the following steps: and determining the common-mode load of the single wire harness model as a parallel value of the common-mode load of each wire in the complex wire harness to be analyzed.
A complex wire harness electromagnetic coupling effect analysis device, the device comprising:
the parameter acquisition module is used for acquiring the wire harness parameters of the complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
the matrix calculation module is used for calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
the segmentation module is used for generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
the equivalent module is used for determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model according to the cascade uniform section and the equivalent inductance matrix, and determining the ground height of the single wire harness model according to the wire distance to the ground height;
and the analysis module is used for analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring a wire harness parameter of a complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model, and determining the ground height of the single wire harness model according to the height of the wire from the ground;
and analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring a wire harness parameter of a complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model, and determining the ground height of the single wire harness model according to the height of the wire from the ground;
and analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
According to the method and the device for analyzing the electromagnetic coupling effect of the complex wire harness, the equivalent inductance matrix of the whole complex wire harness to be analyzed can be obtained through calculation by obtaining the wire harness parameters of the complex wire harness to be analyzed, then the random position of the complex wire harness to be analyzed is simulated through Gaussian distribution and interpolation, and the cascade uniform section is obtained by equivalently forming the conducting wire into the small section. Because the change of the wire harness in the cascade uniform section is the change of the position of the wire, the physical characteristic of the wire harness is not changed, the complex wire harness to be analyzed is equivalent according to the cascade uniform section, and the equivalent radius and the equivalent ground height equivalent to the single wire harness model are calculated according to the equivalent inductance matrix, so that the complex wire harness to be analyzed is simplified, the electromagnetic coupling effect analysis is carried out on the single wire harness model, the analysis process can be greatly simplified, and the analysis accuracy is improved.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a complex beam electromagnetic coupling effect analysis method according to one embodiment;
FIG. 2 is a schematic diagram illustrating random bundling of complex wire harnesses between devices according to one embodiment;
FIG. 3 is a simplified front-to-back schematic diagram of a complex wiring harness in one embodiment;
FIG. 4(a) is a schematic diagram of a modeling process in one embodiment;
FIG. 4(b) is a schematic diagram of spline interpolation wire positions in one embodiment;
FIG. 4(c) is a diagram illustrating the generation of cascaded line segments in one embodiment;
FIG. 5 is a schematic diagram of a wire transposition within a complex wire harness in one embodiment;
FIG. 6 is a schematic diagram of a complex bundle module according to an embodiment;
FIG. 7 is a simplified front-to-back electromagnetic coupling current comparison graph of a complex wiring harness in one embodiment;
FIG. 8 is a block diagram of an apparatus for analyzing electromagnetic coupling effect of a complex wire harness according to an embodiment;
FIG. 9 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, there is provided a method for analyzing electromagnetic coupling effect of complex wiring harness, comprising the steps of:
and 102, acquiring the wire harness parameters of the complex wire harness to be analyzed.
The wire harness parameters include: the number of wires, the wire radius, the wire height from the ground and the wire distance between wires.
The complex wire harness to be analyzed comprises a plurality of wires, the radius of each wire is equal, the starting position and the end position of each wire are the same, but the wires can be wound randomly, so that the electromagnetic coupling effect of the wires is influenced, and the electromagnetic coupling effect is difficult to analyze.
And 104, calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires.
The equivalent inductance matrix is obtained by calculating inductance data of the lead at the beginning, and the position of the default lead does not change at the beginning.
And 106, generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire.
The cascade uniform section is obtained by equating the conducting wire into a plurality of linear small sections, and the position of the linear small section is changed substantially when the cascade uniform section is randomly changed every time, but the physical property of the whole cascade uniform section is not changed.
And 108, determining the equivalent radius of the complex wire harness to be analyzed equivalent to the single wire harness model according to the cascade uniform section and the equivalent inductance matrix, and determining the ground height of the single wire harness model according to the distance between the wire and the ground height.
And step 110, analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
In the complex wire harness electromagnetic coupling effect analysis method, the equivalent inductance matrix of the whole complex wire harness to be analyzed can be obtained through calculation by obtaining the wire harness parameters of the complex wire harness to be analyzed, then the random position of the complex wire harness to be analyzed is simulated through Gaussian distribution and interpolation, and the cascade uniform section is obtained by equivalently forming the conducting wire into small sections. Because the change of the wire harness in the cascade uniform section is the change of the position of the wire, the physical characteristic of the wire harness is not changed, the complex wire harness to be analyzed is equivalent according to the cascade uniform section, and the equivalent radius and the equivalent ground height equivalent to the single wire harness model are calculated according to the equivalent inductance matrix, so that the complex wire harness to be analyzed is simplified, the electromagnetic coupling effect analysis is carried out on the single wire harness model, the analysis process can be greatly simplified, and the analysis accuracy is improved.
Specifically, as shown in fig. 2, a schematic diagram of randomly bundling complex wire harnesses among devices is provided, where a randomly bundled area is a complex wire harness to be analyzed. In fig. 3, a simplified front-to-back schematic view of a complex wiring harness is provided.
In one embodiment, the unit inductance matrix of the complex wire harness is calculated according to the number of wires, the radius of the wires, the height of the wires from the ground and the distance between the wires as follows:
wherein the content of the first and second substances,
representing the unity inductance matrix between conductor i and conductor j,
and
indicating the height of wires i and j from the ground,
and
respectively represent a wire i and a wireThe radius of the wire of j,
representing the wire distance between wires; calculating an equivalent inductance matrix of the complex wire harness according to the number of the leads and the unit inductance matrix as follows:
wherein the content of the first and second substances,
representing the equivalent inductance matrix and n representing the number of conductors.
In the present embodiment, the first and second electrodes are,
the middle diagonal element represents the self-inductance per unit length of the lead, and the off-diagonal element represents the mutual inductance per unit length of the lead. Therefore, the structural parameters of the cross section of the wire and the wiring parameters (the wire spacing and the height to ground) can affect the self-inductance and the mutual inductance of the wire per unit length.
In another embodiment, when the wires in the complex wire bundle to be analyzed are wrapped by the insulation layer, the capacitance parameter of the wire per unit length is determined as follows:
wherein the content of the first and second substances,
represents a capacitance parameter, and:
wherein the content of the first and second substances,
which represents the relative dielectric constant of the material,
，
which represents the dielectric constant of the glass substrate,
and
both represent the insulating layer thickness.
In one embodiment, generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution according to a starting point and an end point of a wire in the complex wire harness to be analyzed; obtaining numerical points through spline interpolation according to the random position; and obtaining the cascade uniform section by adopting a multi-time spline interpolation mode according to the numerical value points.
In particular, while there may be uncertainty as to the relative position of the wires at any location within the harness, they are limited to harness two-terminal connector inserts whose beginning and end are certain. Research shows that the wires in the wire harness have Gaussian distribution in the length direction, and a random spline interpolation method is provided to solve the problem of discontinuity in the construction of a wire model. First, random positions satisfying a gaussian distribution are generated using MATLAB software, as shown in fig. 4 (a). Then, more numerical points are inserted at other positions by spline interpolation, as shown in fig. 4(b), thereby dividing the wire into a series of uniform subsections, and a cascade line segment is generated using a piecewise polynomial form of cubic spline interpolation technique, as shown in fig. 4 (c).
When performing equivalence as a single-wire-harness model, the following conditions need to be satisfied:
(a) all the wires in the wire harness have the same diameter and shape and belong to the same wire, so any two wires can be interchanged;
(b) the wire harness is averagely divided into n sections, and the cross section of each section is the same in size and shape;
(c) the position of any wire in the cross section and the position of the cross section of the wire in other sections are not influenced mutually. Since the cross-sectional shape is fixed, the wire is only at one abrupt position at each segment connection point.
As shown in fig. 5, the wires only abruptly exchange positions at the junction of each subsection due to the fixed shape of the cross-section. Taking several adjacent wire harnesses, and changing the positions of No. 3 wires and No. 8 wires when the first section is changed into the second section; when the second section is changed into the third section, the positions of the No. 5 wire and the No. 10 wire are changed. From the perspective of the transmission parameter matrix, the elements in the matrix have no new value increase, only the mutual positions are changed.
The unit length capacitance matrixes at different positions of the wire harness can be obtained according to the known unit length inductance and capacitance matrixes, and therefore calculation of the distribution parameter matrix is only needed to be performed once.
In one embodiment, according to the cascade uniform section and the equivalent inductance matrix, determining an equivalent radius of the complex wire harness to be analyzed, which is equivalent to a single wire harness model, as follows:
wherein the content of the first and second substances,
which represents the equivalent radius of the beam,
which represents an equivalent inductance matrix of the inductor,
the magnetic permeability in a vacuum is shown,
refers to the height from the ground of the single beam model.
In another embodiment, determining the ground height of the single wire harness model from the wire-to-ground height is:
wherein the content of the first and second substances,
indicating the height of the wire from the ground.
In one embodiment, since common mode current is the main source of electromagnetic interference of the cable, the common mode load of the conductors is mainly considered when dealing with the equivalent termination impedance of the simplified wiring harness. The common-mode load refers to a load between the wire terminal and a reference ground, and the equivalent common-mode load impedance of the simplified wire harness is a parallel value of the common-mode load of each wire terminal in the full wire harness model.
The following description will explain the advantageous effects of the present invention by using a specific example.
The method of the invention is utilized to carry out simplified modeling on the electromagnetic coupling of the 21-core random bundling wire harness, and the simplified model is verified by adopting the electromagnetic simulation software CST. And giving an electromagnetic coupling calculation example for randomly bundling the multi-conductor wire harness under the irradiation of plane waves, and comparing the current responses of the wire harness at the front and rear lead terminals through simulation to verify the correctness and the efficiency of the simplified modeling method.
Consider the 21 multi-conductor random binder harness model shown in fig. 6, where all conductors in the harness are 3/4 arcs of radius R =825mm in length; the core wires have the same radius of 0.2 mm, the thickness of the insulating layer is 1 mm, the dielectric constant of the insulating layer is 2.5, and the relative magnetic conductivity is 1.0; the incident direction of the plane wave is parallel to the reference ground, the direction of the electric field is along the edge of the reference ground, and the amplitude is 50000V/m. The wiring harness load impedance is 50 ohms. The simulation results of electromagnetic coupling current before and after the wire harness is randomly bundled are shown in fig. 7, and the results before and after the wire harness is simplified are well matched, so that the effectiveness of the method is proved.
It should be understood that, although the steps in the flowchart of fig. 1 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 1 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 8, there is provided a complex wire harness electromagnetic coupling effect analysis apparatus, including: a parameter acquisition module 802, a matrix calculation module 804, a segmentation module 806, an equivalence module 808, and an analysis module 810, wherein:
a parameter obtaining module 802, configured to obtain a harness parameter of a complex harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
the matrix calculation module 804 is configured to calculate an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground, and the distance between the wires;
a segmentation module 806, configured to generate a random position where the complex wire harness to be analyzed satisfies gaussian distribution, and interpolate the random position to obtain a cascaded uniform segment corresponding to each conducting wire in the complex wire;
an equivalent module 808, configured to determine, according to the cascade uniform segment and the equivalent inductance matrix, an equivalent radius of the complex wire harness to be analyzed, which is equivalent to a single wire harness model, and determine, according to a ground height of the wire from the ground, a ground height of the single wire harness model;
and the analysis module 810 is used for analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
In one embodiment, the matrix calculation module 804 is further configured to calculate the unit inductance matrix of the complex wire harness according to the number of wires, the radius of the wires, the height of the wires from the ground, and the distance between the wires as:
wherein the content of the first and second substances,
representing the unity inductance matrix between conductor i and conductor j,
and
indicating the height of wires i and j from the ground,
and
respectively representing the wire radii of wire i and wire j,
representing the wire distance between wires;
calculating an equivalent inductance matrix of the complex wire harness according to the number of the leads and the unit inductance matrix as follows:
wherein the content of the first and second substances,
representing the equivalent inductance matrix and n representing the number of conductors.
In one embodiment, the segmenting module 806 is further configured to generate a random position where the complex wire harness to be analyzed satisfies a gaussian distribution according to a starting point and an ending point of a wire in the complex wire harness to be analyzed; obtaining numerical points through spline interpolation according to the random positions; and obtaining a cascade uniform section by adopting a multi-time spline interpolation mode according to the numerical value points.
In one embodiment, the equivalent module 808 is further configured to determine, according to the cascade uniform segment and the equivalent inductance matrix, that the equivalent radius of the complex wire harness to be analyzed is equivalent to a single wire harness model as follows:
wherein the content of the first and second substances,
which represents the equivalent radius of the beam,
which represents an equivalent inductance matrix of the inductor,
the magnetic permeability in a vacuum is shown,
refers to the height from the ground of the single beam model.
In one embodiment, the equivalence module 808 is further configured to determine the ground height of the single-wire harness model according to the wire-to-ground height as follows:
wherein the content of the first and second substances,
indicating the height of the wire from the ground.
In one embodiment, the matrix calculation module 804 is further configured to determine the capacitance parameter of the wire per unit length when the wire in the complex wire bundle to be analyzed wraps the insulating layer as:
wherein the content of the first and second substances,
represents a capacitance parameter, and:
wherein the content of the first and second substances,
which represents the relative dielectric constant of the material,
，
which represents the dielectric constant of the glass substrate,
and
both represent the insulating layer thickness.
In one embodiment, the analysis module 810 is further configured to determine the common-mode load of the single-harness model as a parallel value of the common-mode load of each wire of the complex harness to be analyzed.
For specific limitations of the complex wire harness electromagnetic coupling effect analysis device, reference may be made to the above limitations of the complex wire harness electromagnetic coupling effect analysis method, which is not described herein again. All or part of each module in the complex wiring harness electromagnetic coupling effect analysis device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 9. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a complex beam electromagnetic coupling effect analysis method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 9 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer device is provided, comprising a memory storing a computer program and a processor implementing the steps of the method in the above embodiments when the processor executes the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the method steps of the above-mentioned embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for analyzing electromagnetic coupling effect of a complex wire harness, which is characterized by comprising the following steps:
acquiring a wire harness parameter of a complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model, and determining the ground height of the single wire harness model according to the height of the wire from the ground;
and analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
2. The method of claim 1, wherein calculating an equivalent inductance matrix for a complex wire harness based on the number of wires, the wire radius, the wire-to-ground height, and the wire distance comprises:
calculating the unit inductance matrix of the complex wire harness according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires as follows:
wherein the content of the first and second substances,
representing the unity inductance matrix between conductor i and conductor j,
and
indicating the height of wires i and j from the ground,
and
respectively representing the wire radii of wire i and wire j,
representing the wire distance between wires;
calculating an equivalent inductance matrix of the complex wire harness according to the number of the leads and the unit inductance matrix as follows:
wherein the content of the first and second substances,
representing the equivalent inductance matrix and n representing the number of conductors.
3. The method according to claim 1, wherein generating a random position where the complex wire harness to be analyzed satisfies gaussian distribution, and interpolating the random position to obtain a cascaded uniform section corresponding to each wire in the complex wire comprises:
generating a random position of the complex wire harness to be analyzed, which meets Gaussian distribution, according to the starting point and the end point of the wire in the complex wire harness to be analyzed;
obtaining numerical points through spline interpolation according to the random positions;
and obtaining a cascade uniform section by adopting a multi-time spline interpolation mode according to the numerical value points.
4. The method according to any one of claims 1 to 3, wherein the determining the equivalent radius of the complex wire harness to be analyzed equivalent to the single wire harness model according to the cascade uniform segment and the equivalent inductance matrix further comprises:
according to the cascade uniform section and the equivalent inductance matrix, determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model as follows:
wherein the content of the first and second substances,
which represents the equivalent radius of the beam,
which represents an equivalent inductance matrix of the inductor,
the magnetic permeability in a vacuum is shown,
refers to the height from the ground of the single beam model.
5. The method of claim 4, wherein determining the ground height of the single harness model from the wire-to-ground height comprises:
determining the ground height of the single wire harness model according to the wire distance to the ground height as follows:
wherein the content of the first and second substances,
indicating the height of the wire from the ground.
6. The method according to any one of claims 1 to 3, further comprising:
when the wire in the complex wire bundle to be analyzed wraps the insulating layer, determining the capacitance parameter of the wire in unit length as follows:
wherein the content of the first and second substances,
represents a capacitance parameter, and:
wherein the content of the first and second substances,
which represents the relative dielectric constant of the material,
，
which represents the dielectric constant of the glass substrate,
and
both represent the insulating layer thickness.
7. The method according to any one of claims 1 to 3, further comprising:
and determining the common-mode load of the single wire harness model as a parallel value of the common-mode load of each wire in the complex wire harness to be analyzed.
8. A complex wire harness electromagnetic coupling effect analysis apparatus, the apparatus comprising:
the parameter acquisition module is used for acquiring the wire harness parameters of the complex wire harness to be analyzed; the wire harness parameters include: the number of the wires, the radius of the wires, the height of the wires from the ground and the wire distance between the wires;
the matrix calculation module is used for calculating an equivalent inductance matrix of the complex wire harness to be analyzed according to the number of the wires, the radius of the wires, the height of the wires from the ground and the distance of the wires;
the segmentation module is used for generating a random position of the complex wire harness to be analyzed, wherein the random position meets Gaussian distribution, and interpolating the random position to obtain a cascade uniform section corresponding to each wire in the complex wire;
the equivalent module is used for determining the equivalent radius of the complex wire harness to be analyzed equivalent to a single wire harness model according to the cascade uniform section and the equivalent inductance matrix, and determining the ground height of the single wire harness model according to the wire distance to the ground height;
and the analysis module is used for analyzing the electromagnetic coupling effect of the complex wire harness to be analyzed according to the single wire harness model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010782244.5A CN111737885A (en) | 2020-08-06 | 2020-08-06 | Complex wire harness electromagnetic coupling effect analysis method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010782244.5A CN111737885A (en) | 2020-08-06 | 2020-08-06 | Complex wire harness electromagnetic coupling effect analysis method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111737885A true CN111737885A (en) | 2020-10-02 |
Family
ID=72658182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010782244.5A Pending CN111737885A (en) | 2020-08-06 | 2020-08-06 | Complex wire harness electromagnetic coupling effect analysis method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111737885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112507647A (en) * | 2020-12-15 | 2021-03-16 | 重庆邮电大学 | Electromagnetic coupling time domain modeling analysis method for space electromagnetic field action bifurcation line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205489518U (en) * | 2016-01-19 | 2016-08-17 | 康舒电子(东莞)有限公司 | Power converter's double circuit power supply circuit |
| CN107992686A (en) * | 2017-12-06 | 2018-05-04 | 长春理工大学 | A kind of beam path for Full-automatic wiring machine generates system |
-
2020
- 2020-08-06 CN CN202010782244.5A patent/CN111737885A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205489518U (en) * | 2016-01-19 | 2016-08-17 | 康舒电子(东莞)有限公司 | Power converter's double circuit power supply circuit |
| CN107992686A (en) * | 2017-12-06 | 2018-05-04 | 长春理工大学 | A kind of beam path for Full-automatic wiring machine generates system |
Non-Patent Citations (4)
| Title |
|---|
| 刘浩 等: "用于10BASE_T局域网的非屏蔽双绞线的传导发射研究", 《计算机测量与控制》 * |
| 张冰雪: "互连线缆电磁辐射计算方法研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 张振新: "车载通信总线的电磁兼容性设计", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 肖培: "机电设备互连线缆电磁干扰建模及计算方法研究", 《中国博士学位论文全文数据库 基础科学辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112507647A (en) * | 2020-12-15 | 2021-03-16 | 重庆邮电大学 | Electromagnetic coupling time domain modeling analysis method for space electromagnetic field action bifurcation line |
| CN112507647B (en) * | 2020-12-15 | 2023-07-21 | 重庆邮电大学 | Electromagnetic coupling time domain modeling analysis method for space electromagnetic field acting bifurcation line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023050659A1 (en) | Cable buffer layer defect detection method, apparatus, and device | |
| CN103048563B (en) | The method for quick predicting of a kind of right angle above the ground cable bundle terminal crosstalk | |
| Huang et al. | A new method for predicting crosstalk of random cable bundle based on BAS-BP neural network algorithm | |
| CN105677998A (en) | Method for analyzing transmission line transient response | |
| CN103226166B (en) | Computational method of transfer characteristic of shielded twisted pair RLCG | |
| CN111737885A (en) | Complex wire harness electromagnetic coupling effect analysis method and device | |
| Yang et al. | Analysis on RLCG parameter matrix extraction for multi-core twisted cable based on back propagation neural network algorithm | |
| Jullien et al. | Crosstalk analysis in complex aeronautical bundle | |
| Ciccolella et al. | Stochastic prediction of wire coupling interference | |
| CN116956690A (en) | Submarine cable rated current-carrying capacity finite element calculation method and device and computer equipment | |
| CN109583083B (en) | Cable current-carrying capacity optimization method and device, computer equipment and storage medium | |
| CN109902956B (en) | Cable joint-based risk measurement and calculation processing method and device and computer equipment | |
| Huang et al. | Analysis of crosstalk problem in multi-twisted bundle of multi-twisted wire based on BSAS-BP neural network algorithm and multilayer transposition method | |
| CN115097189A (en) | Cross interconnection cable sheath circulation calculation method and device, electronic equipment and medium | |
| Pang et al. | Analyze the Crosstalk of Multi-core Twisted Wires and the Effect of Non-matched Impedance Based on BSAS-BPNN Algorithm. | |
| CN111722039B (en) | Method and device for calculating coupling interference of cable in shielding cavity to microstrip antenna | |
| CN117634245A (en) | Cable total loss assessment method and device, terminal equipment and storage medium | |
| Sun et al. | Analysis of Amplitude and Angle of Crosstalk in Frequency Domain of Three-Core Twisted Wires | |
| Gunawardana et al. | GPU and CPU-Based Parallel FDTD Methods for Frequency-Dependent Transmission Line Models | |
| Lu et al. | Rapid Analysis of Bent Cable Crosstalk Based on Numerical Calculation | |
| De Oliveira-De Jesus et al. | Optimization of overhead transmission lines insulation and grounding costs with respect to backflashover rate | |
| CN111814266A (en) | Parameter optimization method, device, equipment and storage medium for cable intermediate joint | |
| CN116629058A (en) | Transient time domain analysis method and transient time domain analysis system for multi-core multi-layer cable | |
| CN116955904A (en) | Order reduction method and device for three-core armored power cable carrier model of power distribution network | |
| Schickele et al. | FEM-MTLN hybridization technique to evaluate electrical current on multiconductor cables inside enclosures illuminated by a plane wave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201002 |