CN110555224A - Wiring area environment constraint quantification method based on grid division - Google Patents
Wiring area environment constraint quantification method based on grid division Download PDFInfo
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Abstract
the invention provides a wiring area environment constraint quantification method based on grid division, which comprises the following steps: analyzing the environmental influence factors of the wiring area according to the environmental characteristics of the wiring area of the equipment, and determining the qualitative wiring requirement corresponding to each type of environmental influence factors; determining a routing weight value of each spatial grid point in the routing area under the action of each type of environment influence factor according to the spatial position of the influence source of each type of environment influence factor and a weight value endowing rule corresponding to each type of environment influence factor; determining a normalized routing weight of each spatial grid point according to the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor; and screening out spatial grid points which are allowed to be wired from all the spatial grid points according to the normalized wiring weight of each spatial grid point to form a set of grid points which are allowed to be wired. The invention can improve the rationality of the cable layout design.
Description
Technical Field
The invention relates to the field of aviation equipment cable layout design, in particular to a wiring area environment constraint quantification method based on grid division.
Background
The cable is used as a nervous system of the aviation equipment, and has high requirements on the reliability and the stability of the cable, but most of cable wiring is carried out according to the experience of similar product wiring and the general rule of equipment design at present, and the wiring space environment characteristics of the aviation equipment are not analyzed in detail.
Disclosure of Invention
The invention aims to provide a wiring area environment constraint quantification method based on grid division, which is based on the background of quantification requirements of aviation equipment wiring area environment constraint factors and combines a space rasterization technology, and can better solve the problem that environment influence factors cannot be quantified during cable layout design.
According to an aspect of the present invention, there is provided a method for quantifying wiring region environment constraints based on grid division, the method including:
Analyzing the environmental influence factors of the wiring area according to the environmental characteristics of the wiring area of the equipment, and determining the qualitative wiring requirement corresponding to each type of environmental influence factors;
determining a routing weight value of each spatial grid point in the routing area under the action of each type of environment influence factor according to the spatial position of the influence source of each type of environment influence factor and a weight value endowing rule corresponding to each type of environment influence factor;
determining a normalized routing weight of each spatial grid point according to the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor;
And screening out spatial grid points which are allowed to be wired from all the spatial grid points according to the normalized wiring weight of each spatial grid point to form a set of grid points which are allowed to be wired.
Preferably, the environmental influence factor of the wiring area includes at least one of temperature, vibration, and electromagnetism;
Wherein the wiring qualitative requirement corresponding to the temperature comprises: the influence of temperature stress on a wiring area is reduced;
Wherein the wiring qualitative requirement corresponding to the vibration comprises: providing sufficient strength support and protection to the routing area;
wherein the electromagnetically corresponding wiring qualitative requirements include: classified laying, grounding and shielding.
Preferably, after the step of analyzing the environmental impact factors of the wiring area according to the environmental characteristics of the wiring area of the equipment and determining the qualitative requirement of the wiring corresponding to each type of environmental impact factors, the method further includes a step of rasterizing the wiring area to obtain a rasterized wiring area having a plurality of spatial grid points, specifically:
Determining the rasterization precision of rasterization processing on the wiring area according to the actual design requirement of wiring;
and rasterizing the wiring area according to the rasterization precision by using a space equal division grid method to obtain a rasterized wiring area with a plurality of space grid points.
Preferably, before the step of determining the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor according to the spatial position of the influence source of each type of environmental influence factor and the weight assignment rule corresponding to each type of environmental influence factor, the method further includes a step of determining a quantization principle of each spatial grid point in the routing area, specifically:
Setting the routing weight of a spatial grid point which must pass through the cable in the routing area to be 1;
Setting the routing weight value of a spatial grid point which does not allow a cable to pass through in the routing area to be 0;
And determining the constraint level of each space grid point with the cable passing possibility in the routing area under the action of each type of environmental influence factor according to the routing qualitative requirement corresponding to each type of environmental constraint factor.
Preferably, the step of determining the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor according to the spatial position of the influence source of each type of environmental influence factor and the weight assignment rule corresponding to each type of environmental influence factor includes:
for any type of environmental influence factor j and any spatial grid point i with cable passing possibility, determining the Euclidean distance D between an influence source of the environmental influence factor j and the spatial grid point i according to the spatial position of the influence source;
Determining the minimum wiring weight S of the spatial grid point i under the action of the environmental influence factor j according to the constraint level of the spatial grid point i under the action of the environmental influence factor ji,j,minAnd the maximum wiring weight Si,j,max；
According to the Euclidean distance between the influence source and the spatial grid point i and the minimum wiring weight S of the spatial grid point i under the action of an environmental influence factor ji,j,minAnd the maximum wiring weight Si,j,maxdetermining the wiring weight S of the spatial grid point i under the action of the environmental influence factor ji,j。
Preferably, the routing weight of the spatial grid point i under the action of the environmental influence factor j is calculated by using the following formula:
preferably, the step of determining the normalized routing weight of each spatial grid point according to the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor includes:
Determining a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor by using an analytic hierarchy process;
And determining the normalized routing weight value of the spatial grid point i by using the weight coefficient and the routing weight value of the spatial grid point i under the action of each type of environmental influence factor.
Preferably, the determining, by using an analytic hierarchy process, a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor includes:
determining an importance degree judgment matrix of each environmental influence factor on the spatial grid point i by comparing the influence degrees of the environmental influence factors on the spatial grid point i pairwise;
and determining a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor according to the importance degree judgment matrix of each environmental influence factor on the spatial grid point i.
Preferably, the normalized weight of the spatial grid point i is calculated using the following formulaQi：
Wherein n is the number of environmental influences, Ai,jis the weight coefficient of the spatial grid point i under the action of the environmental influence factor j, Ai,0to Ai,n-1the cumulative sum of (c) is 1.
preferably, the step of screening grid points allowed to be wired from all spatial grid points according to the normalized weight of each spatial grid point to form a grid point set allowed to be wired includes:
determining a threshold value of a wiring weight according to the actual design requirement of wiring;
and respectively comparing the normalized weight of each spatial grid point with the threshold value to obtain a plurality of spatial grid points of which the normalized weight is greater than or equal to the threshold value, and forming a routing-allowed grid point set.
Compared with the prior art, the invention has the beneficial effects that:
The 'wiring area environment constraint quantification method based on grid division' provided by the embodiment of the invention is an aviation equipment wiring constraint processing scheme, fully considers the equipment area environment characteristics, combines a space rasterization technology, quantifies qualitative environment constraint, and can improve the rationality of cable layout design.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an exemplary embodiment of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of a wire routing region environment constraint quantization based on grid partitioning;
FIG. 2 is a schematic diagram of cable layout space gridding;
FIG. 3 is a schematic plan view of a wiring region;
FIG. 4 is a schematic diagram of spatial weighting of wires;
Fig. 5 is a schematic flowchart of a method for quantifying a wiring region environment constraint based on grid division according to an embodiment of the present invention.
Detailed Description
For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the present invention, reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like throughout the several views of the drawings. The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. As used herein, "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
Fig. 5 is a schematic flowchart of a method for quantifying a wiring region environment constraint based on grid division according to an embodiment of the present invention, and as shown in fig. 5, the method may include:
Step S101: according to the environmental characteristics of the wiring area of the equipment, analyzing the environmental influence factors of the wiring area, and determining the qualitative wiring requirements (namely wiring rules) corresponding to each type of environmental influence factors.
wherein the environmental influence factors of the wiring area include but are not limited to at least one of temperature, vibration, electromagnetism;
wherein the temperature-corresponding wiring qualitative requirement includes but is not limited to: the influence of temperature stress on a wiring area is reduced;
wherein the wiring qualitative requirement corresponding to the vibration includes but is not limited to: providing sufficient strength support and protection to the routing area;
wherein the electromagnetically corresponding wiring qualitative requirements include, but are not limited to: classified laying, grounding, shielding/isolating.
After step S101 is executed, a step of spatially rasterizing the wiring area is further included, that is, the wiring area is rasterized to obtain a rasterized wiring area having a plurality of spatial raster points. In general, the higher the rasterization accuracy, the larger the calculation amount later, the higher the requirement for the wiring design for a certain wiring region, the higher the rasterization accuracy can be appropriately increased, and the higher the allowable wiring space for a certain wiring region, the lower the rasterization accuracy can be appropriately decreased to reduce the calculation amount. The space equal division grid method is that a three-dimensional space is divided into multi-layer planes, then the multi-layer planes are subjected to grid, and each intersection point is a space grid point.
step S102: and determining a routing weight value of each spatial grid point in the routing area under the action of each type of environment influence factor according to the spatial position of the influence source of each type of environment influence factor and a weight value endowing rule corresponding to each type of environment influence factor.
Before step S102 is executed, a step of determining a quantization rule for each spatial grid point in the routing region is further included. In one embodiment, a routing weight of spatial grid points in the routing region that must pass through the cable is set to 1; setting the routing weight value of a spatial grid point which does not allow a cable to pass through in the routing area to be 0; and determining the constraint level of each space grid point with the cable passing possibility in the routing area under the action of each type of environmental influence factor according to the routing qualitative requirement corresponding to each type of environmental constraint factor. For example, the constraint weight is divided into three levels, namely, a first level [0-0.33], a second level [0.34-0.66] and a third level [0.67-1], and the three levels can be adjusted or refined for each level.
in one embodiment, step S102 includes: for any type of environmental influence factor j and any spatial grid point i with cable passing possibility, determining the Euclidean distance D between an influence source of the environmental influence factor j and the spatial grid point i according to the spatial position of the influence source; determining the minimum wiring weight S of the spatial grid point i under the action of the environmental influence factor j according to the constraint level of the spatial grid point i under the action of the environmental influence factor ji,j,minand the maximum wiring weight Si,j,maxfor example, a constraint level of [0.34-0.66] under the influence of the temperature of the wiring region]Then the minimum wiring weight Si,j,minAnd the maximum wiring weight Si,j,max0.34 and 0.66, respectively; finally, according to the Euclidean distance between the influence source and the spatial grid point i and the minimum wiring weight S of the spatial grid point i under the action of an environmental influence factor ji,j,minand the maximum wiring weight Si,j,maxDetermining the wiring weight S of the spatial grid point i under the action of the environmental influence factor ji,j. Wherein S is calculated using the following formulai,j：
Step S103: and determining the normalized routing weight of each spatial grid point according to the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor.
in one embodiment, step S103 includes: firstly, determining a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor by using an analytic hierarchy process; and then, determining the normalized routing weight value of the spatial grid point i by using the weight coefficient and the routing weight value of the spatial grid point i under the action of each type of environmental influence factor.
The influence degree of the environmental influence factors on the spatial grid points i is compared pairwise, an importance degree judgment matrix of each environmental influence factor on the spatial grid points i is determined, and a weight coefficient of each spatial grid point i under the action of each type of environmental influence factor is determined according to the importance degree judgment matrix of each environmental influence factor on the spatial grid points i.
Wherein the normalized weight of the spatial grid point i is calculated by using the following formula,n is the number of environmental influences, Ai,jIs the weight coefficient of the spatial grid point i under the action of the environmental influence factor j, Ai,0To Ai,n-1The cumulative sum of (c) is 1.
step S104: and screening out spatial grid points which are allowed to be wired from all the spatial grid points according to the normalized wiring weight of each spatial grid point to form a set of grid points which are allowed to be wired.
In one embodiment, step S104 includes: firstly, according to the actual design requirement of the wiring, a threshold value of a wiring weight is determined, for example, a certain cable in a certain area is sensitive to temperature, and/or the vibration resistance of the cable is poor due to the material selection of the cable, so that the threshold value can be properly improved in a more general situation. And then comparing the normalized weight of each spatial grid point with the threshold value respectively to obtain a plurality of spatial grid points of which the normalized weight is greater than or equal to the threshold value, and forming a routing-allowed grid point set.
According to the wiring area environment constraint quantification method based on grid division, provided by the embodiment of the invention, wiring influence factors are respectively analyzed from three aspects of temperature, vibration and electromagnetic compatibility according to the environment characteristics of the wiring area of equipment, and the corresponding qualitative requirement of wiring is determined; and rasterizing the wiring space by adopting an equal division grid method, realizing qualitative constraint grid point weighting processing according to the spatial position of an influence source, and then realizing normalization of various weights of grid points by taking the weight coefficient of each influence factor obtained by an analytic hierarchy process as a weight proportional coefficient, thereby finally realizing conversion from qualitative to quantitative of regional environment wiring constraint analysis. During the constraint qualitative analysis of the wiring environment, the requirements of temperature, vibration and electromagnetic compatibility of the wiring area are met, so that the extracted constraint factors of the wiring environment are more accurate and accord with the reality. During the quantization process for constraining the grid points, the weighting process for the grid points that realize qualitative constraint is classified in a set rule. During the weight normalization processing, the correlation among the temperature, the vibration and the electromagnetic compatibility of the wiring area is comprehensively considered, the weight coefficient of each influence factor is calculated by using an analytic hierarchy process, and then the weight of the same grid point is normalized by the coefficient. During the conversion from qualitative to quantitative, according to the requirement of the routing task, extracting the routing allowable minimum value of the grid point weights of different types of regions, and accordingly determining the allowable routing grid point set of the region.
The aviation equipment is used as a complex system with high coupling of machine, electricity, heat, light and the like, the equipment cabin is complex in layout and high in filling density, and a plurality of components such as equipment, cables, pipelines, electric connectors, grounding wires and the like are often mixed in a limited cabin space, so that the area environment where the cables are located is more complex, and more influence factors need to be considered. The computer network world journal respectively carries out more detailed qualitative analysis on the environmental characteristics of the wiring area of the electronic equipment in 2002, 2005 and 2007, and considers that in the electronic manufacturing equipment, the cable is mostly positioned inside a working platform and an electric box of each module, the working environment problems of humidity, temperature, chemistry and the like of the cable are required to be considered, once the cable is subjected to fire due to overload work or other reasons, the breathing difficulty of operators is easily caused, so that tragedy occurs, the signal attenuation of the cable is greatly influenced by the temperature, and the signal attenuation of the cable is increased by 4% every time the temperature is increased by 10 ℃, so that the cable is considered to be unsuitable to work in an area with large temperature change; meanwhile, the wet environment can also affect the cable, and the performance of the copper cable is sharply reduced when the copper cable meets water, particularly the electrical performance of the copper cable. Korean crystal of the science and technology university in china has indicated in its japanese paper that in the wiring space of electronic manufacturing equipment, there are numerous electrical and electronic components, cable joints are scattered, wiring obstacles are numerous, it is difficult to plan the feasible paths of all cables by experience, and it is necessary to adopt grid division for the wiring space. The gridding can distinguish wiring areas with different state attributes, particularly complex conditions, can describe characteristics of each part of the wiring area, well embodies various different wiring criteria and wiring processes in engineering practice, and the thesis discusses the area network dividing method in detail, but the method does not analyze the wiring area in detail according to various environmental constraints, and only simply carries out 0-1 treatment on the wiring area according to the position of an obstacle. Therefore, how to numerically express the environmental influence factors of the wiring area in a classification and grading manner is very important for the quantification processing of the cable layout constraint and even the rationality of the cable layout design.
in order to solve the difficult problem of cable layout design, the wiring area environment constraint quantification method provided by the embodiment of the invention comprises the following steps: step one, determining regional environment influence factors and wiring rules according to the characteristics of the equipment wiring region. The method is characterized in that wiring influence factors are analyzed from three aspects of temperature, vibration and electromagnetic compatibility respectively by combining the environmental characteristics of the wiring area of the equipment, and corresponding qualitative requirements of wiring are determined. And step two, determining the grid precision of the wiring area and carrying out gridding processing on the grid precision. The method is characterized in that space grid precision is selected according to the actual wiring area, an equal division grid method is adopted, a three-dimensional space is equally divided into multi-level planes, and then the planes are gridded, so that space gridding processing is achieved. And step three, determining the quantization principle (or assignment principle) of each environmental influence factor. The upper limit and the lower limit of the space point weight are firstly determined according to the wiring rule, and the constraint level of each environment influence factor is actually determined by combining the product. And step four, classifying and carrying out qualitative constraint quantification according to the position of the influence source. And calculating the weight of each environmental influence factor at the point according to a certain attenuation proportion by taking the distance between the environmental influence source and the space point as a basis. And step five, normalizing the weight of each grid point in the wiring area. Firstly, determining the weight coefficient of each environmental influence factor by using an analytic hierarchy process, calculating the comprehensive value of each grid point influence factor in a normalization manner, and normalizing the weight of the grid point. And step six, determining a threshold value of the routing weight of the grid points, and screening out an allowed routing grid point set. According to the actual design requirement of the wiring, the interference degree of the actual environmental influence factors on the cable is determined, then the threshold values of the wiring weight values of the grid points under different types of environmental influence factors are extracted, and the allowable wiring grid point set of the wiring area is determined according to the threshold values. The following takes aviation equipment as an example, and with reference to fig. 1 to 4, the above steps of the wiring area environment constraint quantization method based on grid division according to the embodiment of the present invention are described in detail.
fig. 1 is a flowchart of quantization of environmental constraints of a routing area based on grid division, as shown in fig. 1, including the following steps:
the method comprises the following steps of firstly, qualitatively analyzing regional environment influence, namely determining regional environment influence factors and wiring rules according to the characteristics of equipment wiring regions.
Analysis shows that the acceleration change of an engine is large when the aviation equipment takes off or lands, so that the vibration of an equipment cabin nearby the engine is very violent, the temperature is increased sharply, most cables are positioned in each equipment cabin nearby the engine, and the working environment of the aviation equipment is complex and changeable, so that the space structure and the area environment where the cables are positioned are mainly considered during layout design, the space structure influence is mainly on an obstacle in a wiring area, and the constraint only has two results (0 or 1), and quantitative analysis is not needed. For the constraint of the regional environment, the factors influencing the wiring mainly come from three factors of temperature, vibration and electromagnetism of the region, so that the influence caused by temperature stress is reduced as much as possible during wiring, a region with larger vibration influence is supported and protected with enough strength, and three points of grounding, classified laying and shielding are necessary during wiring.
and step two, rasterizing the wiring space with set precision, namely determining the grid precision of the wiring area and performing the rasterizing treatment on the wiring area.
determining the rasterization precision of a wiring area according to actual design requirements, and then rasterizing the wiring area by adopting a space equal division grid method. The implementation form is as shown in fig. 2, a three-dimensional space point-line model is abstracted from an equipment structure, a model point a at the lower left corner is taken as a coordinate origin O of a wiring space, a three-dimensional space coordinate system O-XYZ is established according to the three-dimensional space point-line model, a model side AD is taken in the coordinate system as an X-axis direction, an equipment model side AB is taken as a Y-axis direction, and a model side AA ' is taken as a Z-axis direction, so that a cable layout planning space ABCD-a ' B ' C ' D ' including the equipment structure model is constructed, and the planning space ABCD-a ' B ' C ' D ' is further equally divided: namely, the planning space is divided into N equal parts along the X axis to obtain N +1 planes ii, then m equal parts are respectively carried out on the N +1 planes along the side Z axis direction, and finally l equal parts are carried out along the Y axis, each intersection point is a space grid point, and the plane division is as shown in a wiring area plane division schematic diagram shown in fig. 3.
and step three, determining the quantization principle of each environmental influence factor.
In order to better satisfy the environmental wiring requirement (i.e., the wiring rule) in the step one, quantization processing is performed on each qualitative constraint (i.e., temperature constraint, vibration constraint, electromagnetic compatibility constraint, etc.) on the basis of the step two, in order to accurately and effectively perform weighting of grid points, each grid point should be performed according to the following principle, and fig. 4 is a schematic diagram after assignment, i.e., a schematic diagram of wiring spatial weighting:
Firstly, the weight value of the point which does not allow the cable to pass through is set to be 0, such as a point in the graph; the weight of the determined fixed point or the point through which the cable must pass is set to be 1, such as the point O in the figure; the weight of the point where the cable can pass through is set as S (the value range is 0-1), such as the point in the graph.
secondly, the possible "·" point of each cable has a plurality of different weights corresponding to different qualitative constraints (electromagnetic compatibility constraint, internal isolation constraint, vibration temperature and other regional environment constraints).
thirdly, evaluating the strength (or constraint level) of the possible "·" point constraint of each cable and the influence (namely the upper limit and the lower limit of the constraint level) according to the regional characteristics, and determining the weight of the point under the constraint by using a corresponding weight determining method; generally, lower weights are given to the wiring corners and the grid points of the laid cables, and higher weights can be given to points far away from pollution sources (various factors influencing wiring).
In one embodiment, the weighting method is as follows: the constraint weight is generally divided into three levels of [0-0.33], [0.34-0.66], [0.67-1], when the constraint level of a certain environmental influence factor is determined, if the difference between the environmental influence factor and the wiring influence is large, more than two levels can be covered, for example, the wiring weight value range of the electromagnetic compatibility constraint is determined between [0.34-1], the internal isolation constraint should determine the wiring weight between [0.0-0.66] according to the pollution or interference degree, the vibration region constraint should assign the weight between [0.34-1.0] according to the influence degree of the vibration region and the characteristics of the wired cable, and the temperature influence region constraint should assign the weight between [0.34-1.0] according to the strength of the temperature influence and the characteristics of the cable.
And fourthly, the weight value of each cyan point can be transformed or adjusted according to the requirements of the model.
If the designer knows the influence of the factors more accurately or in detail, the constraint level can be refined and the selected level of each environmental influence factor can be adjusted.
And step four, realizing weighting of the environment qualitative constraint by classification, namely performing quantitative processing of the qualitative constraint by classification according to the position of the influence source.
And according to the assignment principle given in the step three, after determining the environmental influence levels (upper and lower weight limits), respectively calculating the weight of each environmental influence factor at the point according to the formula 1 by taking the distance between the environmental influence source and the space point as a basis.
in the above formula, S representsWeight of point, SminIs the minimum value (namely the minimum wiring weight value) S of the environmental influence factorsmaxThe maximum value (namely the maximum wiring weight) of the environmental influence factors is represented, and D is the distance between the point and the influence source.
for example, the vibration-affected zone is constrained to a level of [0.34-0.66]]Then S isminis 0.34, SmaxIs 0.66.
and step five, normalizing the weight of each grid point in the wiring area.
an important feature of the analytic hierarchy process is to represent the corresponding importance degree grades of the two schemes in the form of the ratio of two importance degrees. If a certain environmental influence factor of the spatial point is compared with the rest factors pairwise, the degree of importance is graded, a judgment matrix is constructed according to the degree of importance, and a weight vector is calculated, so that the weight coefficient A of each environmental influence factor of the grid point is determinedjThen, the normalized weight of the grid point can be calculated according to equation 2.
in the above formula, Q is the normalized weight of the grid point, n is the number of the environmental influence factors, Aj、Sjweight coefficients and weights, A, of the respective j-type influencing factors0To An-1The cumulative sum of (c) is 1.
And step six, screening the allowed routing grid point set, namely determining a threshold value of a grid point routing weight, screening the allowed routing grid point set, and finishing the quantization processing of the routing area environment constraint.
According to the actual design requirement of wiring, analyzing the regional environment influence bearing capacity of the wired cable, determining the threshold value of the grid point wiring weight, further screening out a set of allowable wiring grid points in the wiring region, and finally realizing the conversion of regional environment wiring influence analysis from qualitative to quantitative.
In summary, the present invention has the following technical effects:
1. The embodiment of the invention starts from three requirements of temperature, vibration and electromagnetic compatibility of a wiring area, so that extracted wiring environment constraint factors are more accurate and accord with the reality;
2. The embodiment of the invention quantifies the spatial wiring environment constraint in a spatial point weighting mode, so that the analysis of the wiring constraint condition is more scientific and reasonable;
3. The grid point weighting method provided by the embodiment of the invention determines the proportion (namely the weight coefficient) of each influence factor by using an analytic hierarchy process, and normalizes various weights, so that the calculation of the wiring grid point set is allowed to be more accurate and quicker.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (10)
1. A wiring area environment constraint quantification method based on grid division is characterized by comprising the following steps:
Analyzing the environmental influence factors of the wiring area according to the environmental characteristics of the wiring area of the equipment, and determining the qualitative wiring requirement corresponding to each type of environmental influence factors;
determining a routing weight value of each spatial grid point in the routing area under the action of each type of environment influence factor according to the spatial position of the influence source of each type of environment influence factor and a weight value endowing rule corresponding to each type of environment influence factor;
determining a normalized routing weight of each spatial grid point according to the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor;
And screening out spatial grid points which are allowed to be wired from all the spatial grid points according to the normalized wiring weight of each spatial grid point to form a set of grid points which are allowed to be wired.
2. the method of claim 1,
the environmental influence factors of the wiring area comprise at least one of temperature, vibration and electromagnetism;
Wherein the wiring qualitative requirement corresponding to the temperature comprises: the influence of temperature stress on a wiring area is reduced;
Wherein the wiring qualitative requirement corresponding to the vibration comprises: providing sufficient strength support and protection to the routing area;
Wherein the electromagnetically corresponding wiring qualitative requirements include: classified laying, grounding and shielding.
3. The method according to claim 1 or 2, wherein after the step of analyzing the environmental impact factors of the routing area according to the environmental characteristics of the routing area of the equipment and determining the qualitative routing requirement corresponding to each type of environmental impact factor, the method further comprises the step of rasterizing the routing area to obtain a rasterized routing area having a plurality of spatial grid points, specifically:
determining the rasterization precision of rasterization processing on the wiring area according to the actual design requirement of wiring;
and rasterizing the wiring area according to the rasterization precision by using a space equal division grid method to obtain a rasterized wiring area with a plurality of space grid points.
4. The method as claimed in claim 3, wherein before the step of determining the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor according to the spatial location of the influence source of each type of environmental influence factor and the weight assignment rule corresponding to each type of environmental influence factor, the method further comprises a step of determining a quantization rule of each spatial grid point in the routing area, specifically:
Setting the routing weight of a spatial grid point which must pass through the cable in the routing area to be 1;
Setting the routing weight value of a spatial grid point which does not allow a cable to pass through in the routing area to be 0;
And determining the constraint level of each space grid point with the cable passing possibility in the routing area under the action of each type of environmental influence factor according to the routing qualitative requirement corresponding to each type of environmental constraint factor.
5. The method as claimed in claim 4, wherein the step of determining the routing weight of each spatial grid point in the routing area under the action of each type of environmental influence factor according to the spatial location of the influence source of each type of environmental influence factor and the weight assignment rule corresponding to each type of environmental influence factor comprises:
for any type of environmental influence factor j and any spatial grid point i with cable passing possibility, determining the Euclidean distance D between an influence source of the environmental influence factor j and the spatial grid point i according to the spatial position of the influence source;
Determining the minimum wiring weight S of the spatial grid point i under the action of the environmental influence factor j according to the constraint level of the spatial grid point i under the action of the environmental influence factor ji,j,minAnd the maximum wiring weight Si,j,max；
According to the Euclidean distance between the influence source and the spatial grid point i and the minimum wiring weight S of the spatial grid point i under the action of an environmental influence factor ji,j,minAnd the maximum wiring weight Si,j,maxDetermining the wiring weight S of the spatial grid point i under the action of the environmental influence factor ji,j。
6. The method of claim 5, wherein the routing weight of the spatial grid point i under the influence of the environmental impact factor j is calculated using the following formula:
7. The method as claimed in claim 6, wherein the step of determining the normalized routing weight for each spatial grid point according to the routing weight for each spatial grid point in the routing region under the influence of each type of environmental impact factor comprises:
Determining a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor by using an analytic hierarchy process;
and determining the normalized routing weight value of the spatial grid point i by using the weight coefficient and the routing weight value of the spatial grid point i under the action of each type of environmental influence factor.
8. The method of claim 7, wherein determining the weighting factor of the spatial grid points i under each type of environmental impact factor using analytic hierarchy process comprises:
determining an importance degree judgment matrix of each environmental influence factor on the spatial grid point i by comparing the influence degrees of the environmental influence factors on the spatial grid point i pairwise;
and determining a weight coefficient of the spatial grid point i under the action of each type of environmental influence factor according to the importance degree judgment matrix of each environmental influence factor on the spatial grid point i.
9. The method of claim 7, wherein the normalized weight Q of the spatial grid point i is calculated using the following formulai：
Wherein n is the number of environmental influences, Ai,jIs the weight coefficient of the spatial grid point i under the action of the environmental influence factor j, Ai,0to Ai,n-1The cumulative sum of (c) is 1.
10. The method according to claim 7, wherein the step of screening out grid points allowing routing from all spatial grid points according to the normalized weight of each spatial grid point, and forming a set of grid points allowing routing comprises:
Determining a threshold value of a wiring weight according to the actual design requirement of wiring;
And respectively comparing the normalized weight of each spatial grid point with the threshold value to obtain a plurality of spatial grid points of which the normalized weight is greater than or equal to the threshold value, and forming a routing-allowed grid point set.
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