MBD-based interface information transfer model and establishment method thereof

Abstract

The invention provides an MBD-based interface information transfer model and an establishment method. Various geometrical characteristics and non-geometrical parameter information reflecting the performance characteristics of the matched product are established in the three-dimensional IDS model of the lower-level matched product. The interface information transfer model transfers interface information needing to be referenced in the subsequent system-level product assembly model design process from a three-dimensional IDS model of a subordinate matched product in modes of copying, reconstruction and the like, and then the reference relation of the two types of models is disconnected. The whole interface transfer model is used as a subordinate matching product object to be installed to a system-level product assembly model, interface characteristics or information among subsequent subordinate matching products uniformly refer to the interface transfer model, so that the assembly model is not strongly coupled with a three-dimensional IDS model of the subordinate matching product, and the assembly model is not strongly coupled with the three-dimensional IDS model of the subordinate matching product. The robustness, the modeling freedom degree and the flexibility of the assembly model are improved.

Description

Technical Field

[0001] The present invention relates to the field of digital three-dimensional design, and in particular to an interface information transfer model based on MBD and a method for establishing the same. Background Art

[0002] Model Based Definition (MBD) is a method different from traditional two-dimensional CAD. Its core idea is to integrate traditional mechanical design information such as product-related geometric shape, size, tolerance, surface roughness, etc., and technical requirements related to product design and manufacturing process status (including but not limited to installation fastener requirements, tightening torque requirements, grounding requirements, thermal conductivity and insulation requirements, installation accuracy requirements) into the product three-dimensional model based on the three-dimensional solid model. The three-dimensional model is used as the only basis for the product design process, thereby ensuring the only data source characteristics in the product development process, greatly improving the uniqueness and accuracy of design and manufacturing information data, and also realizing the structuring of design and manufacturing information data, laying the foundation for the empowerment application of information data.

[0003] A complete system-level product is generally composed of multiple subordinate products (which can be subsystems, subsystems, single machines or components, for the sake of unified description, they are all referred to as subordinate supporting products below). In the MBD establishment method, the system-level product general designer is responsible for the definition of the three-dimensional model architecture of the entire system-level product and the coordination of the interface design between the subordinate supporting products. The subordinate supporting product designer submits the MBD-based subordinate supporting product three-dimensional interface data sheet (Inteface Data Sheet) model (hereinafter referred to as the three-dimensional IDS model) to the product general designer. The system-level product general designer needs to use the relevant interface information in the three-dimensional IDS model of the subordinate supporting product to carry out assembly design, and put forward interface or manufacturing technology requirements for other related subordinate supporting products and manufacturing processes. Therefore, the interface information of each subordinate supporting product and its expression method are the key to the MBD establishment method.

[0004] In the existing MBD establishment methods, the three-dimensional IDS modeling method of the subordinate supporting products is generally standardized and agreed upon, and the interface information is expressed based on the model. However, there are also the following problems:

[0005] (1) The system-level product assembly model extracts interface information from the lower-level supporting products. Therefore, the interface features in the lower-level supporting product model become the parent features of the assembly model features. Once the lower-level supporting product model changes, the assembly model will lose the referenced parent features, causing the assembly model to report an error.

[0006] (2) Changes to the non-interface information of the lower-level supporting product model do not actually affect the assembly relationship of the assembly model, and the assembly model does not have to be changed accordingly. However, since the assembly model directly references the characteristics of the lower-level supporting product model, a strong coupling is generated. As a result, after the assembly model is controlled, the change of the lower-level supporting product model causes the assembly model to be forced to change in order to update the reference relationship between models.

[0007] (3) System-level product designers often need to establish some reference benchmarks in the lower-level supporting product models according to the assembly requirements of the assembly model. However, the lower-level supporting product models are submitted after being controlled and cannot be modeled again, which reduces the modeling freedom of the overall designer.

[0008] (4) For the subordinate supporting products that have become the product spectrum, a model library is often established and named uniformly. Different products are often given product codes when they are selected, and a model can only have one file name, which leads to poor flexibility in model naming.

[0009] In summary, in view of the problems existing in the interface information and its expression method in the MBD establishment method, the present invention proposes an interface information transfer model and establishment method based on MBD to solve the related problems. Summary of the invention

[0010] The object of the present invention is to provide an interface information transfer model based on MBD and a method for establishing the same, so as to solve the problems existing in the prior art.

[0011] The technical solution of the present invention is to provide an interface information transfer model based on MBD, and on the basis of the three-dimensional IDS model of the lower-level supporting product, the interface information that needs to be referenced in the subsequent system-level product assembly model design process is transferred to the interface information transfer model by copying and rebuilding, and then the reference relationship between the two types of models is disconnected;

[0012] The system-level product assembly model is a final, complete system, and integrated model of a product. The subordinate supporting product three-dimensional IDS model is a model of each subsystem, subsystem, single machine or component product that is subordinate to the system-level product. The interface information transfer model is a model established by the system-level product overall designer for copying and transferring the subordinate supporting product three-dimensional IDS model.

[0013] Furthermore, various geometric features and non-geometric parameter information reflecting the performance characteristics of the supporting product are established in the three-dimensional IDS model of the subordinate supporting product, including all interface features or parameter information required for modeling and designing the system-level product assembly model.

[0014] Furthermore, the interface information that needs to be transferred by the interface information transfer model is selected according to subsequent design requirements, including the following interface features or information:

[0015] (1) Mechanical interface characteristics of downstream supporting products:

[0016] Installation coordinate system datum features, installation surface curved features, installation hole features, installation datum hole reference point datum features;

[0017] (2) Electrical interface characteristics of downstream supporting products:

[0018] The model of the electrical connector, the appearance characteristics of the electrical connector, and the reference characteristics of the coordinate system of the electrical connector outlet position;

[0019] (3) Auxiliary geometric features of subordinate supporting products:

[0020] The motion envelope of mechanical products, the field of view surface characteristics of optical products, and the plume surface characteristics of engine products;

[0021] (4) Non-geometric performance parameters or information of subordinate supporting products:

[0022] Quality characteristic parameters, installation surface flatness and surface roughness parameters, installation surface surface treatment information.

[0023] Furthermore, the method for establishing the interface information transfer model is:

[0024] A component model is established corresponding to the three-dimensional IDS model of each subordinate supporting product.

[0025] Another technical solution of the present invention provides a method for establishing an interface information transfer model based on MBD, comprising the following steps:

[0026] S1. The lower-level supporting product designer shall establish the 3D IDS model of the lower-level supporting product according to the unified specifications and submit it to the overall designer;

[0027] S2. The general designer checks the 3D IDS model of the lower-level supporting products to ensure that the interface information is complete and correct;

[0028] S3. The overall designer establishes an interface information transfer model corresponding to the three-dimensional IDS model of each subordinate supporting product, and renames the component model according to the name of the system-level product supporting equipment;

[0029] S4, installing the three-dimensional IDS model of the lower-level supporting product to the interface information transfer model in a reference coordinate system alignment manner, and creating a new part model under the interface information transfer model;

[0030] S5. Transfer the interface information of the 3D IDS model of the lower-level supporting product to the interface transfer model and the newly created part model by copying, referencing and rebuilding. Various surface geometric features, parameter information, etc. can be transferred to the part model, and various reference coordinate systems and reference points, lines, surfaces and other reference features can be directly transferred to the interface transfer model;

[0031] S6, disconnecting the reference relationship between the interface transfer model in the previous step and the newly created part model and the three-dimensional IDS model of the lower-level supporting product;

[0032] S7. Install the entire interface transfer model as a subordinate supporting product object into the system-level product assembly model. The interface features or information between subsequent subordinate supporting products shall uniformly refer to the interface transfer model and the newly created part model instead of the three-dimensional IDS model of the original subordinate supporting product.

[0033] The MBD-based interface information transfer model and its establishment method provided by the present invention have the following beneficial effects:

[0034] (1) The system-level product assembly model is not strongly coupled with the 3D IDS model of the lower-level supporting products. Even if the 3D IDS model of the lower-level supporting products is changed or even lost, it will not cause the assembly model to report an error. The robustness of the system-level product assembly model is significantly enhanced.

[0035] (2) System-level product designers can establish some personalized reference benchmarks in the .asm interface transfer model or the newly created .prt part model as needed, without being restricted by the 3D IDS model of the lower-level supporting products. The overall designer's modeling freedom is significantly improved;

[0036] (3) When the system-level product needs to uniformly name the lower-level supporting products, the .asm interface transfer model can be renamed while keeping the name of the lower-level supporting product's three-dimensional IDS model unchanged, thus significantly improving the flexibility of the product model structure tree naming. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention will be further described below in conjunction with the accompanying drawings:

[0038] Figure 1 The figure is a flow chart of a preferred embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of the main features of the three-dimensional IDS model of the lower-level supporting products of the preferred embodiment of the present invention (taking Pro / E or Creo software as an example).

[0040] Figure 3 Schematic diagram of the main features of the interface information transfer model of a preferred embodiment of the present invention (taking Pro / E or Creo software as an example).

[0041] Figure 4 Schematic diagram of the main features of the system-level product assembly model of a preferred embodiment of the present invention (taking Pro / E or Creo software as an example). DETAILED DESCRIPTION

[0042] The following is a further detailed description of the MBD-based interface information transfer model and its establishment method proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0043] The technical solution of the present invention is:

[0044] All the lower-level supporting products of the system-level product are built into a three-dimensional IDS model according to the unified specification and submitted to the system-level product general designer for the design of the system-level product assembly model. The three-dimensional IDS model is the only carrier for interface coordination during the design of the system-level product assembly model.

[0045] In the system-level product assembly model, the overall designer establishes an MBD-based interface transfer model for each subordinate supporting product, which is used to copy or reference all interface information in the 3D IDS model to the interface transfer model, and then disconnect the reference relationship so that the interface transfer model is not strongly coupled with the 3D IDS model (this process can be automatically completed by developing software tools). In this way, the assembly model can perform secondary modeling, renaming, interface transfer and replication operations without relying on the 3D IDS model of the subordinate supporting product.

[0046] When the interface information of the lower-level supporting products changes, the 3D IDS model is resubmitted according to the change process, and the assembly model is re-transferred and updated with the new interface information; if the lower-level supporting products only have non-interface information model changes, the assembly model does not need to be updated. This iteration is repeated until the technical status of the entire system-level product assembly model is solidified.

[0047] The three-dimensional IDS model of the above-mentioned lower-level supporting products should generally establish various geometric features, non-geometric parameters or information that reflect the performance characteristics of the supporting products, including all interface features required for modeling and design of system-level product assembly models.

[0048] In the above-mentioned MBD-based interface information transfer model, based on the 3D IDS model of the lower-level supporting product, the interface information that needs to be referenced in the subsequent system-level product assembly model design process is transferred to the interface transfer model by copying, reference reconstruction, etc., and then the reference relationship of the model is disconnected. The 3D IDS model interface information that needs to be transferred is selected according to the needs of subsequent design, generally including but not limited to the following interface features or information:

[0049] (1) Mechanical interface features of lower-level supporting products: such as installation coordinate system datum features, installation surface curved features, installation hole features, installation datum hole reference point datum features, etc. These features are used for the final assembly design in the assembly model and form the installation hole table information as the input for system-level product structure design;

[0050] (2) Electrical interface features of lower-level supporting products, such as electrical connector model, electrical connector appearance features, and electrical connector outlet position coordinate system reference features. These features are used for the cable network branch layout design in the assembly model, and ultimately form a cable network model as an input for cable network production and assembly;

[0051] (3) Auxiliary geometric features of lower-level supporting products, such as the motion envelope of mechanical products, the field of view surface features of optical products, and the plume surface features of engine products. These features are used as important constraints in the design of assembly models;

[0052] (4) Non-geometric performance parameters or information of lower-level supporting products, such as quality characteristic parameters, mounting surface flatness and surface roughness parameters, mounting surface surface treatment information, etc. The above parameters are used for quality characteristic calculation and thermal control design of system-level products.

[0053] As can be seen from the above, the core of the present invention lies in the method for establishing the interface information transfer model. The method provided by the present invention is to establish a component model (the present invention takes Pro / E or Creo software as an example, that is, to establish an .asm model) corresponding to the three-dimensional IDS model of each subordinate supporting product as the interface information transfer model. The specific method and steps are as follows:

[0054] (1) The lower-level supporting product designer shall establish the 3D IDS model of the lower-level supporting product according to the unified specifications and submit it to the overall designer;

[0055] (2) The general designer checks the 3D IDS model of the lower-level supporting products to ensure that the interface information is complete and correct;

[0056] (3) The overall designer establishes an .asm interface information transfer model corresponding to the three-dimensional IDS model of each lower-level supporting product, and renames the .asm component model according to the name of the system-level product supporting equipment;

[0057] (4) Install the 3D IDS model of the lower-level supporting product to the .asm interface information transfer model in a reference coordinate system alignment manner, and create a new .prt part model under the .asm interface information transfer model;

[0058] (5) The interface information of the 3D IDS model of the lower-level supporting product is transferred to the .asm interface transfer model and the newly created .prt part model by copying, referencing and rebuilding. Various surface geometric features, parameter information, etc. can be transferred to the .prt part model, and various reference coordinate systems and reference points, lines, surfaces and other reference features can be directly transferred to the .asm interface transfer model;

[0059] (6) Disconnect the reference relationship between the .asm interface transfer model in the previous step and the newly created .prt part model and the 3D IDS model of the lower-level supporting product;

[0060] (7) The entire .asm interface transfer model is installed as a subordinate supporting product object into the system-level product assembly model. The interface features or information between the subsequent subordinate supporting products shall uniformly refer to the .asm interface transfer model and the newly created .prt part model, rather than the 3D IDS model of the original subordinate supporting product.

[0061] Example 1

[0062] The following will take Pro / E or Creo software as an example, combined with Figure 1 to Figure 4 The present invention is described in further detail.

[0063] The system-level product assembly model FXQK001-1_ZY.asm of the preferred embodiment is composed of the interface information transfer models of each subordinate supporting product, and the general designer is responsible for establishing the system-level product assembly model. The subordinate supporting product designer provides each supporting product with a three-dimensional IDS model containing the interface features or parameter information required for the assembly model modeling design. The general designer establishes the interface information transfer model of the corresponding supporting product based on the three-dimensional IDS model of each subordinate supporting product, and transfers the interface features or information in the three-dimensional IDS model to the interface information transfer model, while disconnecting the reference relationship of the interface features between the two models.

[0064] The system-level product assembly model of the preferred embodiment has strong robustness and is not strongly coupled with the three-dimensional IDS model of the lower-level supporting products. Changes to the three-dimensional IDS model will not cause unforeseen errors in the assembly model. At the same time, the overall designer can flexibly name the supporting product interface information transfer model according to the system-level product requirements to avoid naming conflicts between certain model-type stand-alone machines in different system-level product assembly models. In addition, the overall designer's modeling freedom is also significantly improved. According to design requirements, the personalized reference benchmarks and features required for the overall design can be flexibly established in the interface information transfer model.

[0065] like Figure 1 As shown, it is an implementation flow chart of the present invention, and the main steps are as follows:

[0066] (1) Based on the system-level product matching, each lower-level supporting product designer establishes a three-dimensional IDS model of the supporting product in accordance with unified specifications and submits it to the overall designer according to the review process.

[0067] The main features of the three-dimensional IDS model of the supporting products of the preferred embodiment are as follows: Figure 2 The supporting product code is FXQK001-1. To distinguish the detailed 3D design model for the product itself, the overall 3D IDS model name is submitted with the suffix "_JH" added after the supporting product code, and the model name is FXQK001-1_JH.prt.

[0068] The FXQK001-1 three-dimensional IDS model includes all interface features or parameter information required for system-level product assembly modeling and design, mainly including mechanical interface features, electrical interface features, auxiliary geometric features, and non-geometric performance parameters and information.

[0069] Figure 2 Among the features shown, the mechanical interface features include the FXQK001-1 shape, point R, coordinate system RSYS, coordinate system GSYS, point CS_FXQK001-1_PR01-M6, point CS_FXQK001-1_P02-M6, point CS_FXQK001-1_P03-M6, and point CS_FXQK001-1_P04-M6. Among them, the equipment shape features, mounting surface features, and mounting hole features are included in the "FXQK001-1 shape" feature using the shrink envelope method; the supporting product installation coordinate system datum feature is RSYS; the supporting product installation datum hole reference point datum features are CS_FXQK001-1_PR01-M6, CS_FXQK001-1_P02-M6, CS_FXQK001-1_P03-M6, and CS_FXQK001-1_P04-M6.

[0070] The above mechanical interface features are used for the final assembly installation design in the assembly model; according to the reference point reference features of the mounting reference holes of the supporting products, the mounting hole table information can be formed as the input for the system-level product structure design.

[0071] Figure 2 Among the features shown, the electrical interface features include the coordinate system reference features of the electrical connector outlet position, specifically the coordinate system CS_FXQK001-1-X1, the coordinate system CS_FXQK001-1-X2, the coordinate system CS_FXQK001-1-X3, and the coordinate system CS_FXQK001-1-X4; in addition, features such as the electrical connector model are stored in the model parameter table, and the electrical connector appearance features are included in the "FXQK001-1 appearance" feature using the shrinkage envelope method.

[0072] The above electrical interface features are used for the layout design of cable network branches in the assembly model, and finally form a cable network model as the input for cable network production and assembly.

[0073] Figure 2 Among the features shown, the auxiliary geometric features include the surface "field of view". When designing the assembly model, other products should be prevented from entering the "field of view". For mechanical products, their auxiliary geometric features can be surface features such as motion envelopes; for engine products, their auxiliary features can be plume surface features; for general electronic products, they may not include auxiliary geometric features.

[0074] The three-dimensional IDS model of the supporting products shown in the preferred implementation also includes non-geometric performance parameters or information, such as quality characteristic parameters, mounting surface flatness and surface roughness parameters, mounting surface surface treatment information, etc., which are stored in the parameter table of the model. The parameters are used for quality characteristic calculations, thermal control design, etc. of system-level products.

[0075] After the three-dimensional IDS model FXQK001-1_JH.prt is created by the lower-level supporting product designer, it is submitted to the overall designer according to the review process.

[0076] (2) The general designer checks the submitted 3D IDS model. After confirming that the mechanical interface, electrical interface, auxiliary geometric features, and non-geometric performance parameters are complete and correct, the 3D IDS model will serve as the only carrier for interface coordination during the system-level product assembly model design process.

[0077] (3) The overall designer establishes an .asm interface information transfer model corresponding to the three-dimensional IDS model of each lower-level supporting product, and renames the .asm component model according to the name of the system-level product supporting equipment.

[0078] When the overall designer establishes the interface information transfer model, the interface information transfer model of the lower-level supporting products can be uniformly named according to the naming rules of the system-level products, while keeping the name of the three-dimensional IDS model submitted by the lower-level supporting product designer unchanged. In particular, when the lower-level supporting product is a spectrum product, the three-dimensional IDS model of the spectrum product can be named according to its own spectrum product naming rules, and the interface information transfer model used by the system-level product assembly model is named according to the naming rules of the system-level product, which can avoid naming conflicts of the same supporting products in different system-level products, and the flexibility of the naming structure tree of the system-level product model can be significantly improved.

[0079] The interface information transfer model of the supporting products of the preferred embodiment is as follows Figure 3 As shown. The overall designer creates a corresponding interface information transfer model based on the three-dimensional IDS model FXQK001-1_JH.prt of the supporting product submitted by the subordinate supporting product designer; the interface information transfer model adds the suffix "_ZY" after the supporting product code, that is, the name of the interface information transfer model is FXQK001-1_ZY.asm.

[0080] (4) Install the 3D IDS model of the lower-level supporting product to the .asm interface information transfer model in a reference coordinate system alignment manner, and create a new .prt part model under the .asm interface information transfer model;

[0081] The interface information transfer model of the supporting products of the preferred embodiment is as follows Figure 3 shown.

[0082] The interface information transfer model FXQK001-1_ZY.asm includes the three-dimensional IDS model FXQK001-1_JH.prt submitted by the lower-level supporting product designer, which is installed in the interface information transfer model FXQK001-1_ZY.asm in a coordinate system alignment manner.

[0083] At the same time, in order to facilitate the establishment of auxiliary geometry and other features, the overall designer created a new auxiliary geometry model FXQK001-1_FZ.prt, which was also installed in the interface information transfer model FXQK001-1_ZY.asm in a coordinate system alignment manner.

[0084] (5) The interface information of the 3D IDS model of the lower-level supporting product is transferred to the .asm interface transfer model and the newly created .prt part model by copying, referencing and rebuilding. Various surface geometric features, parameter information, etc. can be transferred to the .prt part model, and various reference coordinate systems and reference points, lines, surfaces and other reference features can be directly transferred to the .asm interface transfer model.

[0085] The main features of the interface information transfer model of the supporting products of the preferred embodiment are as follows: Figure 3 shown.

[0086] The interface information transfer model FXQK001-1_ZY.asm includes the three-dimensional IDS model FXQK001-1_JH.prt submitted by the lower-level supporting product designer, the auxiliary geometry model FXQK001-1_FZ.prt newly created by the overall designer, and the installation coordinate system datum features, installation surface curved features, installation hole datum hole reference point datum features, electrical connector outlet position coordinate system datum features, etc. copied from the three-dimensional IDS model FXQK001-1_JH.prt; the interface information stored in the parameter table of the three-dimensional IDS model FXQK001-1_JH.prt is also stored in the parameter table of the interface transfer model FXQK001-1_ZY.asm by copying.

[0087] In the interface information transfer model FXQK001-1_ZY.asm, the installation coordinate system datum features, installation surface features, point datum features of installation datum hole references used by the overall designer to provide the structural designer as design input, and the electrical connector outlet position coordinate system datum features used by the overall designer to design the cable branching layout in the assembly model are all copied from the three-dimensional IDS model FXQK001-1_JH.prt.

[0088] Features that do not affect the assembly model's final installation design, cable layout design, etc., such as appearance, mounting holes, electrical connector appearance and other interface features, do not need to be copied to the interface information transfer model FXQK001-1_ZY.asm, and the relevant features in the 3D IDS model FXQK001-1_JH.prt are still used.

[0089] In a preferred embodiment, the auxiliary geometric features of the "field of view" in the three-dimensional IDS model FXQK001-1_JH.prt, the overall designer creates the same "field of view" surface features in FXQK001-1_FZ.prt. Generally, for the auxiliary geometric features in the three-dimensional IDS model submitted by the subordinate supporting unit, the overall designer can use the method of copying geometry or creating the same features to transfer the auxiliary geometric features to the newly created auxiliary geometric model .prt under the interface information transfer model; if the corresponding auxiliary geometric features need to be adjusted during the overall design process, preferably, the overall designer should use the method of creating the same features to create the auxiliary geometric features.

[0090] The non-geometric performance parameters or information stored in the parameter table of the three-dimensional IDS model FXQK001-1_JH.prt are copied during the overall design and stored in the parameter table of the interface transfer model FXQK001-1_ZY.asm.

[0091] The interface information in the interface information transfer model FXQK001-1_ZY.asm, except for the geometric features such as "appearance", "installation" holes, and "electrical connector appearance" which still use the features in the three-dimensional IDS model FXQK001-1_JH.prt, the information in the features and parameter tables under its root directory includes all other interface information in the three-dimensional IDS model FXQK001-1_JH.prt.

[0092] The correspondence between the interface information in the interface information transfer model FXQK001-1_ZY.asm and the interface information in the three-dimensional IDS model FXQK001-1_JH.prt is shown in Table 1.

[0093] Table 1

[0094]

[0095] (6) disconnecting the reference relationship between the .asm interface transfer model in step (5) and the newly created .prt part model and the three-dimensional IDS model of the subordinate supporting product;

[0096] The main features of the interface information transfer model of the supporting products of the preferred embodiment are as follows: Figure 3 shown.

[0097] In the interface information transfer models FXQK001-1_ZY.asm and FXQK001-1_FZ.prt, the installation surface features, auxiliary geometry features, and point, line, and surface features are copied from the three-dimensional IDS model FXQK001-1_JH.prt; for the copied geometric features such as the installation surface and auxiliary geometry, the association with the original features in the three-dimensional IDS model FXQK001-1_JH.prt is disconnected; for the point, line, and surface features, they are reconstructed with reference to the reference plane and reference coordinate system in the interface information transfer model FXQK001-1_ZY.asm, and the association with the original features in the three-dimensional IDS model FXQK001-1_JH.prt is disconnected.

[0098] After the reference relationship is disconnected, any changes in the geometric features in the 3D IDS model FXQK001-1_JH.prt will not affect the features in the interface information transfer models FXQK001-1_ZY.asm and FXQK001-1_FZ.prt.

[0099] (7) The entire .asm interface transfer model is installed as a subordinate supporting product object into the system-level product assembly model. The interface features or information between the subsequent subordinate supporting products shall uniformly refer to the .asm interface transfer model and the newly created .prt part model, rather than the 3D IDS model of the original subordinate supporting product.

[0100] The system-level assembly model structure of the preferred embodiment is as follows: Figure 4 shown.

[0101] In the system-level assembly model, the supporting product models all use the interface transfer model, such as FXQK001-1_ZY.asm, FXQK002-1_ZY.asm, etc.; when the general designer performs the final assembly design and cable network layout design, if he needs to use the interface features or information of each supporting product, he uses the interface features and information in the interface information transfer model and the auxiliary geometric model instead of the interface information in the three-dimensional IDS model.

[0102] The system-level assembly model can exist independently of the three-dimensional IDS model; changes to the three-dimensional IDS model will not directly affect the assembly model, and will not cause errors when the assembly model is regenerated due to changes in reference relationships.

[0103] If the 3D IDS model is changed and affects the interface information, the supporting product designer shall resubmit a new 3D IDS model according to the change process, and the overall designer shall update the interface information transfer model and the assembly model design; if the 3D IDS model is changed but does not affect the interface information, the overall designer may not update the interface transfer model and the assembly model.

[0104] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An interface information transfer model based on MBD, characterized in that: Based on the 3D IDS model of the lower-level supporting products, the interface information that needs to be referenced in the subsequent system-level product assembly model design process is transferred to the interface information transfer model by copying and rebuilding, and then the reference relationship between the two types of models is disconnected; The system-level product assembly model is a final, complete system, and integrated model of a product. The subordinate supporting product three-dimensional IDS model is a model of each subsystem, subsystem, single machine or component product that is subordinate to the system-level product. The interface information transfer model is a model established by the system-level product overall designer for copying and transferring the interface information in the subordinate supporting product three-dimensional IDS model.

2. The MBD-based interface information transfer model according to claim 1, characterized in that: Various geometric features and non-geometric parameter information reflecting the performance characteristics of the supporting product are established in the three-dimensional IDS model of the subordinate supporting product, including all interface features or parameter information required for modeling and designing the system-level product assembly model.

3. The MBD-based interface information transfer model according to claim 1, characterized in that: The interface information that needs to be transferred in the interface information transfer model is selected according to the subsequent design needs, including the following interface features or information: (1) Mechanical interface characteristics of downstream supporting products: Installation coordinate system datum features, installation surface curved features, installation hole features, installation datum hole reference point datum features; (2) Electrical interface characteristics of downstream supporting products: The model of the electrical connector, the appearance characteristics of the electrical connector, and the reference characteristics of the coordinate system of the electrical connector outlet position; (3) Auxiliary geometric features of subordinate supporting products: The motion envelope of mechanical products, the field of view surface characteristics of optical products, and the plume surface characteristics of engine products; (4) Non-geometric performance parameters or information of subordinate supporting products: Quality characteristic parameters, installation surface flatness and surface roughness parameters, installation surface surface treatment information.

4. The MBD-based interface information transfer model according to claim 1, characterized in that: Corresponding to the three-dimensional IDS model of each subordinate supporting product, a component model is established as an interface information transfer model to carry all interface characteristics or parameter information.

5. The method for establishing an interface information transfer model based on MBD according to any one of claims 1 to 4, characterized in that: The steps include: S1. The lower-level supporting product designer shall establish the 3D IDS model of the lower-level supporting product according to the unified specifications and submit it to the overall designer; S2. The general designer checks the 3D IDS model of the lower-level supporting products to ensure that the interface information is complete and correct; S3. The overall designer establishes an interface information transfer model corresponding to the three-dimensional IDS model of each subordinate supporting product, and renames the component model according to the name of the system-level product supporting equipment; S4, installing the three-dimensional IDS model of the subordinate supporting product to the interface information transfer model in a reference coordinate system alignment manner, and creating a new part model under the interface information transfer model; S5. Transfer the interface information of the 3D IDS model of the lower-level supporting product to the interface transfer model and the newly created part model by copying, referencing and rebuilding. Various surface geometric features, parameter information, etc. can be transferred to the part model, and various reference coordinate systems and reference points, lines, surfaces and other reference features can be directly transferred to the interface transfer model; S6, disconnecting the reference relationship between the interface transfer model in the previous step and the newly created part model and the three-dimensional IDS model of the lower-level supporting product; S7. Install the entire interface transfer model as a subordinate supporting product object into the system-level product assembly model. The interface features or information between subsequent subordinate supporting products shall uniformly refer to the interface transfer model and the newly created part model instead of the three-dimensional IDS model of the original subordinate supporting product.

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