CN112347563A - Aircraft harness mass distribution calculation method and device based on CATIA - Google Patents
Aircraft harness mass distribution calculation method and device based on CATIA Download PDFInfo
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Abstract
The invention provides a method and a device for calculating the mass distribution of an aircraft wire harness based on CATIA (computer-graphics aided three-dimensional interactive application), wherein the method comprises the following steps: the method comprises the steps of full-machine cable information and cable channel information, cable bundling and numbering, harness three-dimensional entity model designing, harness model segmentation and segmentation weight, harness model segmentation parameter weight defining, and harness quality distribution calculation based on three-dimensional model segmentation, successfully overcomes the defects in the existing cable quality distribution calculation technology, greatly saves labor and time on the premise of ensuring the accuracy of cable quality distribution calculation results, and improves the efficiency.
Description
Technical Field
The invention belongs to the field of aircraft weight design in the technical field of aircraft general design, and particularly relates to a method and a device for calculating mass distribution of an aircraft wire harness based on CATIA (computer-graphics aided three-dimensional interactive application).
Background
The airplane mass distribution is mainly used for airplane design links such as airplane load calculation, aeroelasticity analysis, flutter test model design and the like, and directly influences airplane performance evaluation, so that the mass distribution data is required to be real and credible, and the airplane has high accuracy and good timeliness.
The connecting cables between the electronic and electric system and each subsystem of modern aircraft are large in quantity, heavy in weight and complicated in wiring, large aircraft even have tens of thousands of cables, and the gathering trend of aircraft heads/front airframes is presented, so that the quality distribution of the aircraft is seriously influenced.
At present, most of the aircraft research and development units in China introduce an aircraft mass distribution calculation means based on three-dimensional digital-analog segmentation, but in the face of a large number of cables, a large amount of manpower and time are required to be consumed for establishing a single cable three-dimensional model, the quantity of digital-analog is large, and the mass distribution calculation efficiency is low.
Disclosure of Invention
The invention aims to solve the defects in the existing cable mass distribution calculation technology, and provides an aircraft wire harness mass distribution calculation method and device based on CATIA.
The technical scheme of the invention is as follows:
the invention provides an aircraft wire harness mass distribution calculation method based on CATIA (computer-graphics aided three-dimensional interactive application), which comprises the following steps:
acquiring all-airplane cable information of an airplane, wherein the all-airplane cable information comprises incoming terminals, outgoing terminals, installation positioning points and linear density information of all cables;
secondly, acquiring cable channel arrangement information of the airplane;
thirdly, carrying out harness numbering on the full-machine cable according to the full-machine cable information, the cable channel arrangement information and the electrical circuit isolation specification;
step four, obtaining a three-dimensional solid model of the wire harness corresponding to each wire harness number based on CATIA for cables with the same wire harness number according to the wire harness number;
fifthly, determining the cross points and the end points of each wire harness in the wire harness three-dimensional entity model, and measuring the wire harness length between the cross points and the end points of each wire harness;
step six, for each wire harness, acquiring the weight corresponding to the lengths of the wire harnesses according to the lengths of the wire harnesses obtained through measurement and the linear density information of the cable contained in each wire harness length;
seventhly, adding the weight corresponding to the lengths of the multiple wire harnesses included in each wire harness into the three-dimensional wire harness Part solid model;
and step eight, based on the three-dimensional wire harness Part solid model added with the weight information, adopting an airplane mass distribution calculation algorithm based on three-dimensional model segmentation to calculate the airplane wire harness mass distribution.
Optionally, the performing, according to the full-machine cable information, the cable channel arrangement information, and the electrical line isolation specification, a harness number on the full-machine cable includes:
classifying the all-machine cables according to the all-machine cable information and the electrical line isolation specification;
determining a channel through which each cable passes according to an incoming terminal, an outgoing terminal, an installation positioning point and cable channel arrangement information of each cable;
and carrying out harness numbering on the classified full-machine cables according to the passage through which each cable passes.
Optionally, the classifying the all-aircraft cable according to the all-aircraft cable information and the electrical line isolation specification includes:
according to the functional requirements of the full-aircraft cable information and the electrical circuit isolation specification for different cables, the full-aircraft cable is divided into a power generation type, an excitation type, a power supply circuit type, a sensitive passage type, a video passage type, a coaxial cable passage type, a mixed wiring type, a fuel oil measurement passage type, an electric detonation passage type and an electric flight control passage type.
Optionally, the same channel through which cables with the same harness number pass is used in the same modeling model in the harness three-dimensional solid model.
Optionally, the end points of the wire harness include an incoming terminal and an outgoing terminal of each cable included in the wire harness;
the branch point of the wire harness comprises a starting point and an end point of a channel through which all cables included in the wire harness commonly pass, and an installation positioning point through which at least two cables pass in all the cables outside the channel.
The invention also provides an aircraft wire harness mass distribution calculating device based on the CATIA, which comprises:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring all-airplane cable information of an airplane, and the all-airplane cable information comprises an incoming terminal, an outgoing terminal, an installation positioning point and density information of each cable;
the acquisition module is also used for acquiring the cable channel arrangement information of the airplane;
the numbering module is used for numbering the wire harness of the full-machine cable according to the full-machine cable information, the cable channel arrangement information and the electrical circuit isolation specification;
the modeling module is used for obtaining a three-dimensional model of the wire harness corresponding to each wire harness number based on CATIA (computer-graphics aided three-dimensional Interactive application) for cables with the same wire harness number according to the wire harness number to form a wire harness three-dimensional entity model;
the measuring module is used for determining the cross points and the end points of each wire harness in the wire harness three-dimensional entity model and measuring the wire harness length between the cross points and the end points of each wire harness;
the weight acquisition module is used for acquiring the weight corresponding to each of the plurality of harness lengths according to the plurality of measured harness lengths and the linear density information of the cable related to each harness length;
the weight adding module is used for adding the weight corresponding to the lengths of the wire harnesses included in each wire harness into the three-dimensional solid model of the wire harness;
and the weight distribution calculation module is used for calculating the mass distribution of the aircraft wire harness by adopting an aircraft mass distribution calculation algorithm based on three-dimensional model segmentation based on the wire harness three-dimensional solid model added with the weight information.
Optionally, the numbering module is specifically configured to:
classifying the all-machine cables according to the all-machine cable information and the electrical line isolation specification;
determining a channel through which each cable passes according to an incoming terminal, an outgoing terminal, an installation positioning point and cable channel arrangement information of each cable;
and carrying out harness numbering on the classified full-machine cables according to the passage through which each cable passes.
Optionally, the numbering module is specifically configured to:
according to the functional requirements of the full-aircraft cable information and the electrical circuit isolation specification for different cables, the full-aircraft cable is divided into a power generation type, an excitation type, a power supply circuit type, a sensitive passage type, a video passage type, a coaxial cable passage type, a mixed wiring type, a fuel oil measurement passage type, an electric detonation passage type and an electric flight control passage type.
Optionally, the same channel through which cables with the same harness number pass is used in the same modeling model in the harness three-dimensional solid model.
Optionally, the end points of the wire harness include an incoming terminal and an outgoing terminal of each cable included in the wire harness;
the branch point of the wire harness comprises a starting point and an end point of a channel through which all cables included in the wire harness commonly pass, and an installation positioning point through which at least two cables pass in all the cables outside the channel.
The invention provides an aircraft harness mass distribution calculation method and device based on CATIA, which creatively adopts a new method (full-aircraft cable information and cable channel information-cable bundling and numbering-design harness three-dimensional solid model-harness model segmentation and segmented weight-harness model segmented parameter weight definition-harness mass distribution calculation based on three-dimensional model segmentation), successfully solves the defects in the existing cable mass distribution calculation technology, greatly saves labor and time on the premise of ensuring the accuracy of cable mass distribution calculation results, and improves the efficiency.
Drawings
FIG. 1 is a schematic flow chart of a CATIA-based aircraft harness mass distribution calculation method provided by the invention;
fig. 2 is a schematic diagram of a possible segmented model of a wire harness provided by the present invention.
Detailed Description
The invention is further elucidated with reference to the figures and embodiments.
Fig. 1 is a schematic flow diagram of an aircraft harness mass distribution calculation method based on the CATIA, and as shown in fig. 1, the invention provides an aircraft harness mass distribution calculation method and device based on the CATIA, which are used for aircraft cable mass distribution calculation.
Illustratively, for 2 ten thousand cables of a certain type of airplane, the mass distribution of the cables of the airplane is calculated by adopting the aircraft wire harness mass distribution calculation method based on the CATIA provided by the invention, and the steps are as follows:
(1) establishing an airplane cable information table, wherein the airplane cable information table at least comprises cable types, cable marks, incoming terminals, outgoing terminals, installation positioning points and linear density information, and the information table is shown in table 1.
TABLE 1 aircraft Cable information Table
(2) According to the functional requirements of different cables in the full-aircraft cable information and electric line isolation specification, the full-aircraft cable is divided into a power generation type, an excitation type, a power supply line type, a sensitive passage type, a video passage type, a coaxial cable passage type, a mixed wiring type, a fuel oil measurement passage type, an electric detonation passage type and an electric transmission flight control passage type.
Example (c): the cables used for power transmission and distribution have performance requirements in the electrical line isolation specification, and the cables meeting the performance requirements can be classified into a power supply line class.
(3) Bundling and numbering the full-aircraft cables according to the classified cables and the arrangement information of the aircraft cable channels in the step (2), wherein the full-aircraft cables can be bundled into more than 400 groups of wire harnesses, for example: p017 represents the supply line class 17 th group harness. And establishing a wire harness and cable information table, wherein the information table at least comprises cable classification, wire harness number, cable number, incoming terminal, outgoing terminal, installation positioning point and linear density information, and the information table is shown in table 2.
TABLE 2 wire harness and cable information table
(4) Designing a wire harness three-dimensional solid model based on CATIA according to the wire harness cable information table and the airplane cable channel arrangement information in the step (3);
(5) and (4) sequentially numbering and segmenting the wire harness fork points and the end points in the model according to the wire harness three-dimensional solid model in the step (4), wherein the wire harness fork points and the end points in the model are respectively numbered and segmented, such as the fork points A/B/C, the end points a/B/C, the segments AB/BC/Aa/Ab and the like, and a possible wire harness three-dimensional solid model and the fork points, the end points and the segment information thereof are shown in figure 2.
(6) According to the three-dimensional entity model of the wire harness in (5), the lengths of the wire harness segments LAB, LBC, LAa, LAb and the like between the cross points (such as AB segment, BC segment and the like) and between the cross points and the end points (such as Ba segment, Bb segment and the like) in the model are measured.
(7) And (4) establishing a wire harness section weight information table according to the wire harness cable information table in the step (3), the wire harness section in the step (5) and the wire harness section measuring length in the step (6).
Example (c): the wire harness segmented weight information table of the wire harness number P017 is shown in table 3.
TABLE 3 Pencil segmentation weight information Table
(8) And (4) adding a harness segment weight parameter in the model according to the harness segment weight information table in the step (7) based on the harness three-dimensional entity digital model in the step (4).
(9) And (4) calculating the mass distribution data of the wire harness by adopting an airplane mass distribution calculation algorithm based on three-dimensional model segmentation based on the wire harness three-dimensional solid model with the wire harness segmentation weight parameters added in the step (8).
Example (c): the wire harness mass distribution data information of the wire harness number P017 is shown in table 4.
TABLE 4 Pencil quality distribution data information sheet of pencil number P017
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. An aircraft wire harness mass distribution calculation method based on CATIA is characterized by comprising the following steps:
acquiring all-airplane cable information of an airplane, wherein the all-airplane cable information comprises incoming terminals, outgoing terminals, installation positioning points and linear density information of all cables;
secondly, acquiring cable channel arrangement information of the airplane;
thirdly, carrying out harness numbering on the full-machine cable according to the full-machine cable information, the cable channel arrangement information and the electrical circuit isolation specification;
fourthly, obtaining a three-dimensional model of the wire harness corresponding to each wire harness number based on CATIA (computer-graphics aided three-dimensional Interactive application) for cables with the same wire harness number according to the wire harness number to form a wire harness three-dimensional entity model;
fifthly, determining the cross points and the end points of each wire harness in the wire harness three-dimensional entity model, and measuring the wire harness length between the cross points and the end points of each wire harness;
step six, for each wire harness, acquiring the weight corresponding to the lengths of the wire harnesses according to the measured lengths of the wire harnesses and the linear density information of the cable related to the length of each wire harness;
seventhly, adding the weight corresponding to the lengths of the multiple wire harnesses included in each wire harness into the three-dimensional entity model of the wire harness;
and step eight, based on the wire harness three-dimensional entity model added with the weight information, adopting an airplane mass distribution calculation algorithm based on three-dimensional model segmentation to calculate the airplane wire harness mass distribution.
2. The method of claim 1, wherein said wire harness numbering said all-in-one cable according to said all-in-one cable information and cable channel placement information, and electrical line isolation specifications, comprises:
classifying the all-machine cables according to the all-machine cable information and the electrical line isolation specification;
determining a channel through which each cable passes according to an incoming terminal, an outgoing terminal, an installation positioning point and cable channel arrangement information of each cable;
and carrying out harness numbering on the classified full-machine cables according to the passage through which each cable passes.
3. The method of claim 1, wherein the classifying the all-airplane cable according to the all-airplane cable information and electrical line isolation specification comprises:
according to the functional requirements of the full-aircraft cable information and the electrical circuit isolation specification for different cables, the full-aircraft cable is divided into a power generation type, an excitation type, a power supply circuit type, a sensitive passage type, a video passage type, a coaxial cable passage type, a mixed wiring type, a fuel oil measurement passage type, an electric detonation passage type and an electric flight control passage type.
4. The method of claim 2, wherein the same modeling model is used in the bundle three-dimensional solid model for the same path through which cables having the same bundle number pass.
5. The method of claim 1, wherein the end points of the wiring harness comprise an incoming terminal and an outgoing terminal of each cable comprised by the wiring harness;
the branch point of the wire harness comprises a starting point and an end point of a channel through which all cables included in the wire harness commonly pass, and an installation positioning point through which at least two cables pass in all the cables outside the channel.
6. An aircraft harness mass distribution computing device based on CATIA, characterized by comprising:
the system comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for acquiring all-airplane cable information of an airplane, and the all-airplane cable information comprises an incoming terminal, an outgoing terminal, an installation positioning point and linear density information of each cable;
the acquisition module is also used for acquiring the cable channel arrangement information of the airplane;
the numbering module is used for numbering the wire harness of the full-machine cable according to the full-machine cable information, the cable channel arrangement information and the electrical circuit isolation specification;
the modeling module is used for obtaining a three-dimensional model of the wire harness corresponding to each wire harness number based on CATIA (computer-graphics aided three-dimensional Interactive application) for cables with the same wire harness number according to the wire harness number to form a wire harness three-dimensional entity model;
the measuring module is used for determining the cross points and the end points of each wire harness in the wire harness three-dimensional entity model and measuring the wire harness length between the cross points and the end points of each wire harness;
the weight acquisition module is used for acquiring the weight corresponding to each of the plurality of harness lengths according to the plurality of measured harness lengths and the linear density information of the cable related to each harness length;
the weight adding module is used for adding the weight corresponding to the lengths of the wire harnesses included in each wire harness into the three-dimensional solid model of the wire harness;
and the weight distribution calculation module is used for calculating the mass distribution of the aircraft wire harness by adopting an aircraft mass distribution calculation algorithm based on three-dimensional model segmentation based on the wire harness three-dimensional solid model added with the weight information.
7. The apparatus of claim 6, wherein the numbering module is specifically configured to:
classifying the all-machine cables according to the all-machine cable information and the electrical line isolation specification;
determining a channel through which each cable passes according to an incoming terminal, an outgoing terminal, an installation positioning point and cable channel arrangement information of each cable;
and carrying out harness numbering on the classified full-machine cables according to the passage through which each cable passes.
8. The apparatus of claim 6, wherein the numbering module is specifically configured to:
according to the functional requirements of the full-aircraft cable information and the electrical circuit isolation specification for different cables, the full-aircraft cable is divided into a power generation type, an excitation type, a power supply circuit type, a sensitive passage type, a video passage type, a coaxial cable passage type, a mixed wiring type, a fuel oil measurement passage type, an electric detonation passage type and an electric flight control passage type.
9. The apparatus of claim 7, wherein the same modeling model is used in the bundle three-dimensional solid model for the same path through which cables having the same bundle number pass.
10. The device of claim 6, wherein the end points of the wiring harness include an incoming terminal and an outgoing terminal of each cable included in the wiring harness;
the branch point of the wire harness comprises a starting point and an end point of a channel through which all cables included in the wire harness commonly pass, and an installation positioning point through which at least two cables pass in all the cables outside the channel.
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| US20220398537A1 (en) * | 2021-06-10 | 2022-12-15 | Caterpillar Inc. | System and method for calculating cost for wire harness assembly |
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