Single-machine equipment simplification method and system based on three-dimensional model

Abstract

The present invention provides a method and system for simplifying a stand-alone device based on a three-dimensional model, including: a bridge model creation step, a base model creation step, an internal component analysis processing step, an exposed component analysis processing step, an independent component designation step, and a model merging and deriving step: geometrically merging the base model with the exposed component set model to generate a body model, and assembling independent components to form a simplified model, and obtaining simplified information of a stand-alone device based on a three-dimensional model. The present invention realizes the compression of the satellite three-dimensional stand-alone model file size, the filtering of internal components, and the unified standard simplification of three-dimensional models in multiple software formats, which provides conditions for the satellite overall design unit to carry out satellite design and calculation, and also improves the design iteration efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of methods for simplifying three-dimensional models, and in particular to a method and system for simplifying a single-machine device based on a three-dimensional model. Background Art

[0002] In the field of satellite design, stand-alone equipment products are an important part of satellites and an important input for the overall satellite configuration and layout design. Their design status and quality directly affect subsequent design and application. Stand-alone equipment has the characteristics of wide distribution and multiple subsystems.

[0003] At present, all general research and development units have generally carried out digital design based on three-dimensional models, that is, by extracting its mechanical characteristics from the three-dimensional model of the equipment, such as installation interface, electrical connector interface, quality characteristics, product name and other information, and directly applying it to subsequent design. Therefore, at present, the subsystem units of single-machine equipment have added three-dimensional models as design inputs for the overall design units on the basis of submitting product interface data sheets.

[0004] However, when the overall design unit signs and controls the 3D model to PDM (Product Data Management) and in the subsequent satellite design process, problems such as incompatibility of various modeling software and failure to simplify the 3D model of the software, which results in the model being too large to be calculated, often occur, reducing design efficiency and causing unnecessary design risks. This is mainly manifested in:

[0005] (1) Equipment simplified modeling is not standardized

[0006] Due to different digital implementation specifications, different institutes have different model specifications. Subsystem contractors have insufficient knowledge of the relevant standards and specifications of the overall institute, which can easily lead to the submitted 3D models not meeting the relevant requirements of the overall institute, thus easily causing unnecessary iterations due to the standardization of the 3D models, which prolongs the design cycle.

[0007] (2) Single machine model is too large

[0008] There are many types of satellites, some models have nearly 200 units, plus the cables, thermal control components and structural components of the overall circuit, structure and thermal control subsystems, the size of the original 3D model file of the whole satellite can reach more than ten GB, even on a workstation with better performance, it is very difficult to perform design operations or calculations. Each design iteration or change will take a lot of time, seriously affecting the design efficiency;

[0009] (3) Equipment simplification effect is not ideal

[0010] There are many stand-alone development units for each satellite subsystem, and the model and version of modeling software used by each unit are also different. In order to facilitate viewing and management, the overall unit requires that the models submitted by each unit should be converted into neutral format files such as .stp, .xt or .igs. However, after the simplification process, many problems arise, such as the failure to filter small internal components, resulting in excessive file size, or the field of view, plume, optical path and other model information of the stand-alone unit cannot be viewed by stand-alone operation, or the stand-alone unit body is a surface model and cannot transmit quality attribute information, etc., which brings a lot of inconvenience to the design work of the overall unit. Summary of the invention

[0011] In view of the defects in the prior art, the object of the present invention is to provide a method and system for simplifying a single-machine device based on a three-dimensional model.

[0012] A method for simplifying a single-machine device based on a three-dimensional model provided by the present invention includes:

[0013] Steps for creating a bridge model: Assemble the detailed design model (before simplification) in the bridge model, create two empty models, and obtain empty model creation information;

[0014] Steps for creating a base model: Create information based on the empty model, which will serve as a carrier for subsequent merging with solid complex geometry and parsing of inner cavity components;

[0015] Internal component analysis and processing steps: Analyze and eliminate internal components using the matrix model;

[0016] Exposed component analysis and processing steps: Use the matrix model to filter out small-volume components among the exposed components;

[0017] Independent component designation steps: Identify the components that need to be retained;

[0018] Model merging and derivation steps: geometrically merge the base model and the exposed component assembly model to generate a body model, and assemble independent components to form a simplified model to obtain simplified information of a single device based on a three-dimensional model.

[0019] Through the specified model derivation tool, the base model and the exposed components are converted into a body part model through geometric Boolean operations, and the independent components are assembled with it to form a simplified model.

[0020] Preferably, the step of creating a bridge model comprises:

[0021] Create bridge model sub-step: Assemble the detailed design model (before simplification) in the bridge model, and create an empty part model and an empty assembly model. The empty part model serves as a carrier for subsequent base model features, and the empty assembly model serves as a collection carrier for exposed components.

[0022] Preferably, the step of creating a matrix model comprises:

[0023] Steps for defining the model contour base: Define the model contour base through the basic features of prism, cylinder, frustum and hemisphere.

[0024] Preferably, the internal component analysis processing step includes:

[0025] Internal component marking step: the internal components that are completely covered by the base model are analyzed through geometric Boolean operations and marked as excluded components;

[0026] Preferably, the exposed component analysis processing step includes:

[0027] Small volume component exclusion step: define the total volume percentage or absolute volume as the threshold for screening small volume components, and exclude small volume components according to the threshold.

[0028] A three-dimensional model-based stand-alone equipment simplification system provided by the present invention includes:

[0029] Create a bridge model module: assemble the detailed design model (before simplification) in the bridge model, create two empty models, and obtain empty model creation information;

[0030] Create base model module: Create information based on the empty model, which will serve as a carrier for subsequent merging with solid complex geometry and parsing of inner cavity components;

[0031] Internal component analysis and processing module: Analyze and eliminate internal components using the matrix model;

[0032] Exposed component analysis and processing module: using the matrix model to filter out small-volume components among the exposed components;

[0033] Independent component designation module: identifies the components that need to be retained;

[0034] Model merging and derivation module: geometrically merge the base model and the exposed component collection model to generate a body model, and assemble independent components to form a simplified model to obtain simplified information of a single-machine device based on a three-dimensional model.

[0035] Through the specified model derivation tool, the base model and the exposed components are converted into a body part model through geometric Boolean operations, and the independent components are assembled with it to form a simplified model.

[0036] Preferably, the bridge model creation module comprises:

[0037] Create a bridge model submodule: Assemble the detailed design model (before simplification) in the bridge model, and create an empty part model and an empty assembly model. The empty part model serves as a carrier for subsequent base model features, and the empty assembly model serves as a collection carrier for exposed components.

[0038] Preferably, the base model creation module comprises:

[0039] Model contour base definition module: Define the model contour base through prism, cylinder, frustum and hemisphere basic features.

[0040] Preferably, the internal component analysis processing module includes:

[0041] Internal component marking module: It uses geometric Boolean operations to parse out the internal components that are completely covered by the base model and mark them as excluded components;

[0042] Preferably, the exposed component analysis and processing module includes:

[0043] Small volume component exclusion module: defines the total volume percentage or absolute volume as the threshold for screening small volume components, and excludes small volume components based on the threshold.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. In the present invention, the simplified model can avoid the problem that the submitted three-dimensional model does not meet the relevant specifications of the overall institute due to different specifications of the model among different institutes, reduce unnecessary coordination and iteration between design units, and thus shorten the design cycle;

[0046] 2. In the present invention, the simplified three-dimensional model can greatly reduce the file size, providing conditions for the overall design unit to carry out the design and calculation of the entire satellite;

[0047] 3. In the present invention, intelligent filtering of components inside a single machine is realized, only the geometry of the single machine is retained, and intelligent filtering of components with small shapes is supported;

[0048] 4. In the present invention, the simplified stand-alone model is a component model, and the equipment body, field of view, plume, optical path, hanger, star protection cover, etc. are all separate components, which can facilitate the overall design unit to view, hide, etc.;

[0049] 5. In the present invention, the simplified stand-alone model has no external reference, and an independent complete reference is formed inside it, and there are no free state parts. The overall design unit can conveniently perform operations such as deletion and implicitness without causing constraint problems;

[0050] 6. In the present invention, each stand-alone design unit using different types and versions of modeling software can obtain a unified and standardized three-dimensional model after simplification by this method, which can facilitate the setting of the mechanical interface information of the model. If the design model is changed, the model can be quickly updated through the model change response, thereby greatly improving the efficiency of design iteration. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0052] Figure 1 A schematic diagram of a process flow based on a three-dimensional model simplification method provided by the present invention.

[0053] Figure 2 This is a schematic diagram of creating a bridge model provided by the present invention.

[0054] Figure 3 This is a schematic diagram of creating a matrix model provided by the present invention.

[0055] Figure 4 This is a schematic diagram of the analysis and processing of exposed components provided by the present invention.

[0056] Figure 5 A processing schematic diagram is specified for the independent components provided by the present invention.

[0057] Figure 6 This is a schematic diagram of the model merging, derivation and change response provided by the present invention.

[0058] Figure 7 This is a schematic diagram of a simplified pre-detailed model provided by the present invention.

[0059] Figure 8 This is a simplified model schematic diagram provided by the present invention. DETAILED DESCRIPTION

[0060] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0061] like Figure 1-8The present invention provides a method and system for simplifying a stand-alone device based on a three-dimensional model, including: creating a bridge model step, creating a base model step, internal component analysis and processing step, exposed component analysis and processing step, independent component designation step, and model merging and deriving step: geometrically merging the base model and the exposed component set model to generate a body model, and assembling independent components to form a simplified model, and obtaining simplified information of a stand-alone device based on a three-dimensional model. The present invention realizes the compression of the file size of the satellite three-dimensional stand-alone model, the filtering of internal components, and the unified standard simplification of three-dimensional models in multiple software formats, which provides conditions for the satellite overall design unit to carry out satellite design and calculation, and also improves the efficiency of design iteration.

[0062] A simplified method based on a three-dimensional model, comprising:

[0063] Step 1: Create a bridge model;

[0064] Open the original 3D model of the single machine, create a bridge model, and create an empty part model and an empty assembly model. The empty part model serves as the carrier of the subsequent base model features, and the empty assembly model serves as the collection carrier of the exposed components.

[0065] Step 2: Create the base model;

[0066] The model contour matrix is ​​defined by basic features such as prisms, cylinders, frustums and hemispheres. This matrix model will also serve as a carrier for subsequent merging with complex solid geometry and analyzing inner cavity components.

[0067] Step 3: Internal component analysis and processing;

[0068] After the matrix model outline is defined, the internal components completely covered by the matrix model are analyzed through geometric Boolean operations and marked as excluded components, so as to quickly remove the components inside the device body (such as printed circuit boards, components, etc.);

[0069] Step 4: Analysis and processing of exposed components;

[0070] Define the total volume percentage or absolute volume as the threshold for screening small volume components, and exclude small volume components (such as fasteners, etc.) based on the threshold;

[0071] Step 5: Independent component designation;

[0072] Identify part models that need to be retained but not simplified through human-computer interaction;

[0073] Step 6: Model merging and derivation;

[0074] The base model and the exposed component assembly model are geometrically merged to significantly reduce the complex curved surfaces inside the base, generate a body model, and assemble independent components to form a simplified model.

[0075] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0076] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A method for simplifying a single-machine device based on a three-dimensional model, characterized in that: include: Steps for creating a bridge model: assemble the detailed design model before simplification in the bridge model, create two empty models, and obtain empty model creation information; Steps for creating a base model: Create information based on the empty model, which will serve as a carrier for subsequent merging with solid complex geometry and parsing of inner cavity components; Internal component analysis and processing steps: Analyze and eliminate internal components using the matrix model; Exposed component analysis and processing steps: Use the matrix model to filter out small-volume components among the exposed components; Independent component designation steps: Identify the components that need to be retained; Model merging and derivation steps: geometrically merge the base model and the exposed component assembly model to generate a body model, and assemble independent components to form a simplified model to obtain simplified information of a single device based on a three-dimensional model.

2. The method for simplifying a single device based on a three-dimensional model according to claim 1, characterized in that: The step of creating a bridge model includes: Create bridge model sub-steps: Assemble the detailed design model in the bridge model, and create an empty part model and an empty assembly model. The empty part model serves as a carrier for subsequent base model features, and the empty assembly model serves as a collection carrier for exposed components.

3. The method for simplifying a single device based on a three-dimensional model according to claim 1, characterized in that: The step of creating a base model comprises: Steps for defining the model contour base: Define the model contour base through the basic features of prism, cylinder, frustum and hemisphere.

4. The method for simplifying a single device based on a three-dimensional model according to claim 1, characterized in that: The internal component analysis processing step includes: Internal component marking step: The internal components that are completely covered by the base model are analyzed through geometric Boolean operations and marked as excluded components.

5. The method for simplifying a single device based on a three-dimensional model according to claim 1, characterized in that: The exposed component analysis processing step includes: Small volume component exclusion step: define the total volume percentage or absolute volume as the threshold for screening small volume components, and exclude small volume components based on the threshold.

6. A three-dimensional model-based single-machine equipment simplification system, characterized in that: include: Create a bridge model module: assemble the detailed design model before simplification in the bridge model, create two empty models, and obtain empty model creation information; Create base model module: Create information based on the empty model, which will serve as a carrier for subsequent merging with solid complex geometry and parsing of inner cavity components; Internal component analysis and processing module: Analyze and eliminate internal components using the matrix model; Exposed component analysis and processing module: using the matrix model to filter out small-volume components among the exposed components; Independent component designation module: identifies the components that need to be retained; Model merging and derivation module: geometrically merge the base model and the exposed component collection model to generate a body model, and assemble independent components to form a simplified model to obtain simplified information of a single-machine device based on a three-dimensional model.

7. The three-dimensional model-based single-machine equipment simplification system according to claim 6, characterized in that: The bridge model creation module includes: Create a bridge model submodule: Assemble the detailed design model in the bridge model, and create an empty part model and an empty component model. The empty part model serves as the carrier of subsequent base model features, and the empty component model serves as the collection carrier of exposed components.

8. The three-dimensional model-based single-machine equipment simplification system according to claim 6, characterized in that: The base model creation module comprises: Model contour base definition module: Define the model contour base through prism, cylinder, frustum and hemisphere basic features.

9. The three-dimensional model-based single-machine equipment simplification system according to claim 6, characterized in that: The internal component analysis processing module includes: Internal component marking module: It uses geometric Boolean operations to parse out the internal components that are completely covered by the base model and mark them as excluded components.

10. The three-dimensional model-based single-machine equipment simplification system according to claim 6, characterized in that: The exposed component analysis and processing module includes: Small volume component exclusion module: defines the total volume percentage or absolute volume as the threshold for screening small volume components, and excludes small volume components based on the threshold.

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