CN113505438B - Spacecraft final assembly process template preparation method and system driven by technical status - Google Patents

Abstract

The invention discloses a templated programming method and a templated programming system for a spacecraft assembly process driven by a technical state. The technical state driven spacecraft final assembly process templated programming method comprises three steps of meta-model configuration, process template configuration and process template application, and a final assembly process is generated; the technical state driven spacecraft assembly process templated compiling system comprises a meta-model editing and managing module, a process template editing and managing module and a process template application module. The process template can be rapidly reused under different product model systems of different spacecrafts, and the problems of accumulation and reuse of process knowledge in a single-piece small-batch development mode are effectively solved; the invention can generate the processes corresponding to various manufacturing targets by using the same template, and is more suitable for the requirements of the spacecraft assembly stage on the diversification of the technical state of the product and the quick response control.

Description

Spacecraft final assembly process template preparation method and system driven by technical status

Technical field

The invention belongs to the field of manufacturing and assembly technology, and specifically relates to a technical state-driven spacecraft assembly process preparation method and system.

Background technique

Spacecraft final assembly is the integrated assembly and testing of spacecraft product subsystems. For large spacecraft products such as newly developed satellites and spacecrafts, after entering the final assembly stage, the product design, final assembly and testing processes have not yet been finalized, and the parts supply chain has not yet matured. In this situation, product designers and process designers need to analyze the results of trial assembly, functional testing, and performance testing, as well as frequent problems such as untimely development and delivery of parts, production resource allocation conflicts, and time node compression caused by large-scale system coordination. events, and carry out continuous design adjustments and optimization iterations on products and processes respectively. This type of adjustment involves repeated switching of product assembly states and needs to be clearly defined in the final assembly process. However, due to the urgent development tasks of newly developed spacecraft, it is difficult to directly reuse the spacecraft process developed in a single piece. There is an urgent need for a new process design method with high efficiency and clear definition of the product assembly process status.

In the manufacturing industry, traditional process texts are more inclined to require geometric and precision parameters for manufacturing, and are less focused on assembly status as the main manufacturing goal. In recent years, the application of new technologies such as artificial intelligence and digital twins in manufacturing process design has made a series of breakthroughs: artificial intelligence technology is widely used in the field of optimization of process routes and process parameters, and big data statistical methods are used to optimize equipment manufacturing performance, Save manufacturing costs and analyze the causes of quality problems; digital twin technology is widely used in manufacturing process monitoring, optimizing collaboration between design and production. However, there is still a lack of effective design methods for the final assembly process. The contradiction between large-scale process state setting requirements and tight process preparation time has not yet been solved. The large-scale application of universal process templates in the final assembly stage of extremely personalized spacecraft has not yet been solved. The problem.

Beijing Satellite Manufacturing Factory Co., Ltd. has applied for an invention patent titled "Spacecraft Process Template and Its Implementation System, Method and Application" with application number CN201910441181.4. It uses a parametric method to realize the automatic filling of different product attributes in the process template. , but it cannot solve the problem of differentiated automatic generation of similar products with different characteristics when the same template is applied, and it does not have content related to product technical status settings. The Shanghai Satellite Equipment Research Institute applied for an invention patent titled "Knowledge-based Assembly Process Design Method, System and Media" with application number CN201911076823.1. It proposed a set of methods for assembly process knowledge modeling and rapid generation of process knowledge. It contains the logical extraction and logical organization of the assembly process, but lacks a structured description and intuitive feedback on the technical status of the final assembly.

Contents of the invention

The purpose of the present invention is to propose a technology-state-driven spacecraft assembly process template preparation method and system to solve the problem in the existing technology that the universal process template cannot be reused on a large scale in the extremely personalized spacecraft assembly stage. , and based on the same process template, can support the batch generation of final assembly processes and personalized settings of technical status of multiple personalized products, better meeting the diverse and fast-response control requirements for product technical status in the spacecraft final assembly stage.

In order to achieve the above purpose, the invention proposes a technical state-driven spacecraft assembly process template preparation method, which includes the following steps:

Step 1: Metamodel configuration. The metamodel is the basic unit for expressing the characteristics of spacecraft products. It is stored in the metamodel dictionary after configuration. Metamodel configuration includes the following three aspects:

(1) Feature metamodel configuration: The feature metamodel is used to describe the physical characteristics of the spacecraft product. Each feature metamodel includes number, name, format, value range, description, etc. The number is in the dictionary to which the metamodel belongs. only.

(2) State element model configuration: The state element model is used to describe the possible states of spacecraft products during the final assembly process. Each state element model includes number, name, value range, default state, description, etc. The number is in It is unique in the dictionary to which the metamodel belongs.

(3) Metamodel dictionary configuration: The metamodel dictionary is used to store and manage the relationships between metamodels. The associations that can exist between any feature meta-models include equality and inheritance; the associations that can exist between any state meta-models include equality and inheritance.

Step 2: Process template configuration. A process template is a text description framework that performs specific process operations on one or more objects of a specified type, including template objects, template manufacturing targets, and template logic blocks. The configuration of the process template includes the following three aspects:

(1) Template object configuration: The template object is used to represent a spacecraft product. The template object includes object type, object identifier, object feature metamodel collection, object state metamodel collection, object description, etc. Template object configuration is to configure the content contained in the above template object, where: the object type should correspond to the spacecraft product type represented; the object identifier must be unique within this process template; the object feature metamodel collection contains The feature metamodel is regarded as a characteristic attribute of the model object corresponding to the spacecraft product, and there should be no equality or inheritance relationship between each other; the state element model included in the object state metamodel collection is regarded as the model object corresponding to the spacecraft product A state attribute of , and there should be no equality or inheritance relationship between each other; the object description is a supplementary text description of the object, which can include the specific meaning of the object, as well as the context in which the object is referenced in the template, etc.

Optionally, the template object configuration can also configure a template object array, where the template object array contains a plurality of identical template objects.

(2) Template manufacturing target configuration: The template manufacturing target describes the manufacturing target objects supported by the process template and their manufacturing target status. The method of template manufacturing target configuration is: select all or part of the template objects of the process template as the manufacturing target object; for each manufacturing target object, select all or part of the state attributes as the manufacturing target state; for each manufacturing target state, select The desired state attribute value of the state is configured as the manufacturing target state option of the template user.

Optionally, a process template can set a default set of manufacturing targets as default options when template users configure manufacturing targets.

(3) Template logic block design: Template logic block is a description unit of process operation content and content organization logic. It includes text used to describe process operations, manufacturing target expressions corresponding to the text, and combination logic representing the template logic blocks. logical expression.

Optionally, the combinational logic of the template logic block includes four relationship forms such as serial, hierarchical, selection, and loop. Serial logic means that there is a sequential execution constraint between two template logic blocks. The operation described in the previous template logic block is not allowed to be executed until the operation described in the previous template logic block is completed; when two template logic blocks are adjacent and are not When marking the remaining three logic rules, it is assumed that there is serial logic between them. Hierarchical logic indicates that there are parent-child relationship constraints between template logic blocks. When the operation described in the sub-module is completed, it returns to the parent module to continue execution; when selecting a logic representation template application, different template logic blocks are only enabled under judgment conditions. Each group of selection branches should be regarded as a template logic block, which contains multiple groups of sub-template blocks and determination condition configurations. The judgment condition is configured based on a function that takes the template object attribute/state or the template manufacturing target state as a parameter; circular logic indicates that when the template is applied, the same template logic block content will be repeated continuously when the judgment condition is established, and serial logic will be used. Get organized. The judgment condition is configured based on a function that takes the template object attribute/state or the template manufacturing target state as a parameter, and the looped content should be regarded as a template logic block.

Template logic block design includes template logic design, process text compilation, and manufacturing target configuration. The template logic design process includes: sorting out the allowed manufacturing target state combinations according to the template manufacturing targets; sorting out the process operation steps achieved by each manufacturing target combination, and dividing the process steps into different template logic blocks; sorting out the templates for different manufacturing target combinations Logic blocks are combined to form a template logic framework that is compatible with all template manufacturing target combinations. The process text compilation refers to compiling the process operation steps in each template logic block and writing the corresponding process operation instructions. The manufacturing target configuration refers to configuring the status attribute value of the template object by using an assignment expression, and the assignment expression should have a clear correspondence with the process text.

Step 3: Process template application, that is, after the process template is called, the final assembly process text is generated based on the input characteristics and status attributes of the spacecraft product, the process manufacturing target configuration, and the process text combination logic built into the process template logic block.

The specific implementation method of the process template application includes the following steps:

(1) Product instance configuration: Users configure product instances before using the template. The specific method is to respectively select a set of feature metamodels and a set of state metamodels that do not have an equality or inheritance relationship from the metamodel dictionary as the set of feature attributes and set of state attributes of the product instance, and then assign values to the attributes, so that the value of the feature attribute It is consistent with the actual product, so that the status attribute value is consistent with the status of the spacecraft object before the process is implemented.

(2) Template object assignment: Template object assignment means copying the attribute values of the spacecraft product instance into the attribute values of the template object. When assigning values, you should observe the metamodel relationship between the template object attributes and the product instance attributes. If the template object attributes are equal to the product instance attributes, or the product instance attributes inherit from the template object attributes, then the value of the product instance attributes is assigned to the template object attribute. ; When assigning a value to an array of template objects, after confirming the number of template objects contained in the array, the assignment operation for each template object is the same as the previous method.

(3) Process manufacturing target configuration: The user realizes the configuration of the process manufacturing target by selecting unique assignments for the manufacturing target states of all template manufacturing target objects according to the essential purpose of the process design. In particular, if the original template manufacturing target contains an array of template objects, you need to configure the process manufacturing target of each array member after assigning the value to the template object array.

(4) Process generation: After starting to generate the process, read the template logic blocks in sequence. If there is a logic expression in the template logic block, judge whether the process operation text of the logic block is valid based on whether the logic expression is established, and Confirm the way in which the process operation text is assembled with other template logic block texts; synchronously, if the process operation text has a manufacturing target expression corresponding to it, the status attribute of the template object is assigned a value according to the expression. After the process is generated, each product instance is assigned a value so that its status attribute is the same as that of the corresponding template object.

Optionally, the process template application also includes process manufacturing target verification to ensure that the process generated by the template call can achieve the process manufacturing target and will not lead to unexpected operation results. The specific process manufacturing target verification is: after the process is generated, read all the status attributes of the product instance and perform two types of verification: the first is to compare the manufacturing target status in the process manufacturing target with the corresponding status attributes of the product instance , if the two are consistent, it indicates that the template call can achieve the process manufacturing target, confirm that it passes this verification, otherwise the user will be notified of the unachievable status target; the second is to compare the non-process manufacturing target status with the corresponding status attribute of the product instance Compare the two. If they are consistent, it means that the template call will not cause unexpected product instance status changes. Confirm that this verification is passed. Otherwise, the user will be notified to further determine whether to accept the unexpected changes.

On the other hand, the present invention proposes a technical state-driven spacecraft assembly process template preparation system, which includes a meta-model editing and management module, a process template editing and management module, and a process template application module. Wherein, the metamodel editing and management module is used for metamodel configuration, including a feature metamodel editor for providing feature metamodel editing and model relationship configuration functions, and a state metamodel editor for providing state metamodel editing and model relationship configuration functions. Metamodel editor, and a metamodel dictionary used to save the configuration results of the feature metamodel editor and the state metamodel editor. In the process template configuration and application process, the meta-model dictionary supports the system to query meta-models and provides determination results of equality and inheritance relationships between meta-models. The meta-model dictionary can also be used for prototype model configuration in a Product Data Management (PDM) system.

The process template editing and management module is used for process template configuration, including a template object editor, a template manufacturing target editor, a template logic block editor and a process template library. The template object editor calls the meta model dictionary of the meta model editing and management module to support users to configure template objects based on meta models; the template manufacturing target editor configures template manufacturing targets based on template objects; the template logic The block editor provides template logic block editing and debugging functions based on template objects and template manufacturing targets; the process template library is used to store designed templates and accept calls from process template application modules.

The process template application module is used for retrieving and calling process templates, and includes a process template retrieval unit, a product instance retrieval unit, a template object assignment unit, a process manufacturing target assignment unit, a process generation unit and a process output unit. The process template retrieval unit supports querying process templates that match manufacturing goals; based on the queried process template, the product instance retrieval unit obtains product instances from the product data management (PDM) system; based on the attribute values of the obtained product instances, The template object assignment unit assigns values to the attributes of the template object; based on the queried process template and the essential purpose of the process design, the process manufacturing target assignment unit selects a unique assignment for the manufacturing target state of the template manufacturing target object; based on the template object assignment and process The manufacturing target is assigned, and the process generation unit generates the process; finally, the process output unit outputs the generated process to the Computer Aided Process Planning (CAPP) system for further editing and publishing.

Optionally, the process template application module also includes a process manufacturing target verification unit, which is used to perform process manufacturing target verification on the process generated by the process generation unit to ensure that the process generated by the template call can achieve the process manufacturing target; It will not lead to unexpected operation results. The verified process is output to the CAPP system through the process output unit. After the process is generated, the process manufacturing target verification unit reads all the status attributes of the product instance and performs two types of verification: the first is to compare the manufacturing target status in the process manufacturing target with the corresponding status attributes of the product instance. , if the two are consistent, it indicates that the template call can achieve the process manufacturing target, confirm that it passes this verification, otherwise the user will be notified of the unachievable status target; the second is to compare the non-process manufacturing target status with the corresponding status attribute of the product instance Compare the two. If they are consistent, it means that the template call will not cause unexpected product instance status changes. Confirm that this verification is passed. Otherwise, the user will be notified to further determine whether to accept the unexpected changes.

This invention is based on a multi-layered logic block combination that takes product attributes and technical status values as logical judgment conditions to realize the rapid setting and generation of product technical status and supporting process text; this invention is based on meta-models to build spacecraft products and template objects. model, so that the process template can be quickly reused under different product model systems of different spacecrafts, effectively solving the problem of accumulation and reuse of process knowledge in the single-piece and small-batch development mode; the present invention uses product technical status requirements as a template Manufacturing targets are configured, and the process text is assembled through the technical status-driven process template. The same template can be used to generate processes corresponding to multiple manufacturing targets, which is more suitable for diversification and rapid response to product technical status in the spacecraft final assembly stage. Control needs.

Description of the drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the invention. In the attached picture below:

Figure 1 is a schematic diagram of method steps according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the system structure of an embodiment of the present invention;

Figure 3 is an example diagram of metamodel configuration according to the embodiment of the present invention;

Figure 4 is an example diagram of process template object configuration according to the embodiment of the present invention;

Figure 5 is an example diagram of a process template manufacturing target configuration according to an embodiment of the present invention;

Figure 6 is an example diagram of a process template logic block design according to an embodiment of the present invention;

Figure 7 is a schematic diagram of an example of a spacecraft product according to an embodiment of the present invention;

Figure 8 is an example diagram of product instance configuration and template object assignment according to the embodiment of the present invention;

Figure 9 is an example diagram of process manufacturing target setting and process generation results for formal equipment installation according to the embodiment of the present invention;

Figure 10 is an example diagram of process manufacturing target setting and process generation results for temporary equipment installation according to the embodiment of the present invention;

Figure 11 is an example diagram of process manufacturing target verification results according to the embodiment of the present invention.

Among them, 1 in Figure 7 is equipment 001, 2 is cabin board 001, 3 is screw 001, 4 is screw 002, 5 is screw 003, 6 is screw 004, 7 is gasket 001, 8 is gasket 002, and 9 is Gasket 003, 10 is gasket 004, 11 is ground wire 001, and 12 is nut 001.

In Figure 9, 901 is a schematic diagram of the results of the formal equipment installation, 902 is the process manufacturing target table corresponding to the formal equipment installation, and 903 is the corresponding generated process table.

In Figure 10, 101 is a schematic diagram of the results of temporary equipment installation, 102 is the process manufacturing target table corresponding to the temporary equipment installation, and 3 is the corresponding process table generated.

Detailed ways

The content of the present invention will be further clarified below through specific embodiments. Of course, the description of the following specific embodiments is only to illustrate different aspects of the present invention and should not be construed as limiting the scope of the present invention.

Taking satellite assembly as the application background, a specific implementation mode of the present invention is as follows:

As shown in Figure 1, the technical state-driven spacecraft assembly process template preparation method proposed by the present invention includes three steps:

Step 1: Metamodel configuration. In this method, the metamodel is the basic unit for expressing the characteristics of spacecraft products, and is stored in the metamodel dictionary after configuration. Metamodel configuration includes the following three aspects:

(1) Feature metamodel configuration: The feature metamodel is used to describe the physical characteristics of the spacecraft product. Each feature metamodel includes number, name, format, value range, description, etc. The number is unique in the dictionary to which the metamodel belongs. The configuration of a set of feature metamodels in the method of this embodiment is shown in Figure 3.

(2) State element model configuration: The state element model is used to describe the possible states of the spacecraft product during the final assembly process. Each state element model includes number, name, value range, default state, description, etc. The number is unique in the dictionary to which the metamodel belongs. A set of state element model configurations in the method of this embodiment are shown in Figure 3.

(3) Metamodel dictionary configuration: The metamodel dictionary is used to store and manage the relationships between metamodels. The correlations that can exist between any feature meta-models include equality and inheritance; the correlations that can exist between any state meta-models include equality and inheritance. If metamodel C inherits from B, and B inherits from A, then the metamodel C can be inferred from A through the dictionary. However, loop configuration is not allowed, that is, it is not allowed to infer that "metamodel A inherits from B, and metamodel B inherits from A". As shown in Figure 3, in this embodiment, in the feature element model dictionary, "specification" (TZ006) and "model" (TZ009) are configured to have an equal relationship, and "fastener insurance" (TZ012) and "electrical connection" are configured. "Insuring" (TZ013) are inherited from "Insuring" (TZ011); in the state element model dictionary, "Welding" (ZT008) and "Welding" (ZT009) are configured to have an equal relationship.

Step 2: Process template configuration. In the present invention, a process template is a text description framework for performing specific process operations on one or more objects of a specified type, including three contents: template objects, template manufacturing targets, and template logic blocks. Correspondingly, the configuration of the process template includes the following three aspects:

(1) Template object configuration: The template object is used to represent a spacecraft product. The template object includes object type, object identifier, object feature metamodel collection, object state metamodel collection, object description, etc. Template object configuration is to configure the content contained in the above template object, where: the object type should correspond to the spacecraft product type represented; the object identifier must be unique within this process template; the object feature metamodel collection contains The feature metamodels are regarded as a characteristic attribute of the spacecraft product corresponding to the template object, and there should be no equality or inheritance relationship between them; the state metamodels included in the object state metamodel collection are regarded as the spacecraft product corresponding to the template object. A state attribute, and there should be no equality or inheritance relationship between them; the object description is a supplementary text description of the template object, which can include the specific meaning of the template object, as well as the context in which the template object is referenced in the template, etc.

In some embodiments, in addition to configuring a single template object, you can also configure an array of template objects, and the array contains a to-be-determined number of identical template objects. As shown in Figure 4, a total of 6 template objects are configured. The specific numbers of "screws" (LD) and "pads" (DP) can only be obtained based on the product instance when the template is applied, so they are configured as arrays.

(2) Template manufacturing target configuration: Process manufacturing target refers to the state expectation for the operated spacecraft product after the process operation is performed. In the present invention, the template user realizes the configuration of the process manufacturing target by presetting the expected value of the spacecraft product status attribute, and drives the template to generate a process consistent with the manufacturing target through the process manufacturing target. Corresponding to the process manufacturing target, the template manufacturing target describes the manufacturing target object supported by the process template and its manufacturing target state. The method of template manufacturing target configuration is: select all or part of the template objects (including template object arrays) of the process template as the manufacturing target object; for each manufacturing target object, select all or part of the state attributes as the manufacturing target state; for each manufacturing target Target state, configure the state attribute value that can be used as the desired state as the template user's manufacturing target state option. As shown in Figure 5, the template of the method in this embodiment is configured with three sets of template manufacturing targets. Equipment, screws, washers, ground wires and nuts are used as template manufacturing target objects, and some or all of their status attributes are in the three sets of template manufacturing targets. They are used as templates to create target states. The deck is not configured as a manufacturing target object.

In some embodiments, a process template may set a default set of manufacturing targets as default options when template users configure manufacturing targets.

(3) Template logic block design: In the present invention, the template logic block is a description unit for process operation content and content organization logic, including text used to describe process operations, manufacturing target expressions corresponding to the text, and template logic representing Logical expression for combinational logic between blocks. Among them, the combinational logic of template logic blocks has four forms: serial, hierarchical, selection, and loop:

Serial logic means that there is a sequential execution constraint between two template logic blocks. Only after the operation described in the previous template logic block is completed, the operation described in the latter template logic block is allowed to be executed. When two template logic blocks are adjacent and the remaining three logic rules are not marked, serial logic exists between them by default. As shown in the template logic block example in Figure 6 and the corresponding two sets of process generation results (Figure 9, Figure 10), although each template logic block is affected by combinational logic such as levels, selections, and loops when applying the template, the generation results are still Arrange them in ascending order according to the serial numbers of the logical blocks at each level.

Hierarchical logic indicates that there are parent-child relationship constraints between template logic blocks. After the operation described in the sub-module is completed, it returns to the parent module to continue execution. As shown in Figure 6, the template has a total of 3 layers. For example, logical block 1 and logical block 1-2-1-6 have a parent-child relationship, and logical block 1-5 and logical blocks 1-5-1 and 1-5-2 have a parent-child relationship.

When selecting a logic representation template application, different template logic blocks are enabled only under decision conditions. Each group of selection branches should be regarded as a template logic block, which contains multiple groups of sub-template blocks and determination condition configurations. Determination conditions are configured based on functions that take template object attributes/states or template manufacturing target states as parameters. As shown in Figure 6, logical blocks 1, 1-2, 1-3, 1-4, 1-5-1, 1-5-2, 1-6-1, 1-6-2, 2, 2- 1 are template logic blocks with selection logic, using "if (expression)" to express: if the expression is true, the text of the module content, the manufacturing target expression, and the content of the sub-level module are enabled.

Loop logic means that when a template is applied, the same template logic block content will be repeated continuously when the judgment condition is true, and organized in serial logic. The judgment condition is configured based on a function that takes the template object attribute/state or the template manufacturing target state as a parameter, and the looped content should be regarded as a template logic block. As shown in Figure 6, logic blocks 1-1, 1-5, and 2-1-1 are all template logic blocks with circular logic, which are represented by "foreach (template object)": the template object array members are traversed, and each Once traversed, the looped content will be generated once.

Template logic block design includes template logic design, process text compilation, and manufacturing target configuration. The process is as follows:

First, according to the template manufacturing target, the allowed manufacturing target state combinations are sorted out. As shown in Figure 5, there are three groups of manufacturing target states: "formal equipment installation", "temporary equipment installation", and "dismantling equipment";

Then, the process operation steps implemented by each manufacturing target combination are sorted out, and the process steps are divided into different template logic blocks. As shown in Figure 6, the logical blocks corresponding to "formal equipment installation" are all logical blocks under the jurisdiction of logical block 1; the logical blocks corresponding to "temporary equipment installation" are 1-1 and 1-5 in logical block 1. ;The logical blocks corresponding to "Remove Equipment" are all logical blocks under the jurisdiction of logical block 2. In the embodiment of the present invention, in order to reduce the size of the module, multiple manufacturing targets are allowed to share the same logic block content, and different manufacturing target logics are routed through the if status requirements of the manufacturing targets.

Afterwards, the template logic blocks of different manufacturing target combinations are merged to form a template logic framework that is compatible with all template manufacturing target combinations, as shown in Figure 6.

Process text compilation refers to compiling the process operation steps within each template logic block and writing the corresponding process operation instructions. The editing effect is shown in the "Process Operation Text" column of the table in Figure 6.

Manufacturing target configuration refers to using assignment expressions to configure the status attribute values of the template object. The assignment expressions should have a clear correspondence with the process text. The configuration effect is shown in the "Manufacturing Target Expression" column of the table in Figure 6.

Step 3: Process template application. Process template application means that after the process template is called, the final assembly process text is generated based on the input characteristics and status attributes of the spacecraft product, the process manufacturing target configuration, and the process text combination logic built into the process template logic block. This embodiment applies a process template to the equipment installation conditions shown in Figure 7 to generate the formal installation process and temporary installation process of the equipment. The specific implementation method includes the following steps:

(1) Product instance configuration: Before using the template, the user configures the product instance as shown in Figure 7. The specific method is to respectively select a set of feature metamodels and a set of state metamodels that do not have an equality or inheritance relationship from the metamodel dictionary as the set of feature attributes and set of state attributes of the product instance, and then assign values to the attributes, so that the value of the feature attribute It is consistent with the actual product, so that the status attribute value is consistent with the status of the spacecraft object before the process is implemented. The configuration results are shown in the "Product Instance Configuration" section in Figure 8.

(2) Template object assignment: Template object assignment means copying the attribute values of the spacecraft product instance into the attribute values of the template object. When assigning values, you should observe the metamodel relationship between the template object attributes and the product instance attributes. If the template object attributes are equal to the product instance attributes, or the product instance attributes inherit from the template object attributes, then the value of the product instance attributes is assigned to the template object attribute. ; When assigning a value to an array of template objects, after confirming the number of template objects contained in the array, the assignment operation for each template object is the same as the previous method. The configuration result is shown in the "Template Object Assignment" part in Figure 8. Comparing it with the "Product Instance Configuration" part on the left side of Figure 8, you can intuitively see the mapping relationship between the two groups of object instances.

(3) Process manufacturing target configuration: The user realizes the configuration of the process manufacturing target by selecting unique assignments for the manufacturing target states of all template manufacturing target objects according to the essential purpose of the process design. In particular, if the original template manufacturing target contains an array of template objects, you need to configure the process manufacturing target of each array member after assigning the value to the template object array. As shown in Figures 9 and 10, the process manufacturing objectives of "formal equipment installation" and "temporary equipment installation" are configured in detail respectively.

(4) Process generation: After starting to generate the process, read the template logic blocks in sequence. If there is a logic expression in the template logic block, judge whether the process operation text of the logic block is valid based on whether the logic expression is established, and Confirm the way in which the process operation text is assembled with other template logic block texts; synchronously, if the process operation text has a manufacturing target expression corresponding to it, the status attribute of the template object is assigned a value according to the expression. As shown in Figures 9 and 10, processes corresponding to "formal equipment installation" and "temporary equipment installation" are generated respectively. After the process is generated, each product instance is assigned a value so that its status attribute is the same as the status attribute of the corresponding template object, that is, the "operation result" of the template's product status is saved back to the product instance.

In some embodiments, the process template application also includes process manufacturing target verification to ensure that the process generated by the template call can achieve the process manufacturing target and will not lead to unexpected operation results. The process manufacturing target verification is specifically: after the process is generated, read all the status attributes of the product instance, and perform two types of verification: the first is to compare the manufacturing target status in the process manufacturing target with the corresponding status attributes of the product instance Compare the two, if they are consistent, it indicates that the template call can achieve the process manufacturing target, confirm that it passes this verification, otherwise the user will be notified of the unachievable status target; the second one is to map the non-process manufacturing target status to the product instance Compare the status attribute with the status attribute. If the two are consistent, it indicates that the template call will not cause unexpected changes in the product instance status. Confirm that this check is passed. Otherwise, the user will be notified to further determine whether to accept the unexpected change. In this embodiment, the "Manufacturing Target Expression" column in the "Process Generation Result" shown in Figure 9 or Figure 10 is compared with the "Process Manufacturing Target" on the left to confirm whether there are missing items, multiple items, or wrong items. , the comparison results are shown in Figure 11.

The technical state-driven spacecraft assembly process template preparation system proposed by the present invention is shown in Figure 2, and is used to realize the processes and functions contained in the aforementioned method through software. The preparation system includes a meta-model editing and management module, a process template editing and management module, and a process template application module.

The metamodel editing and management module is used for metamodel configuration, including a feature metamodel editor for providing feature metamodel editing and model relationship configuration functions, and a state metamodel for providing state metamodel editing and model relationship configuration functions. editor, and a metamodel dictionary used to save the configuration results of the feature metamodel editor and the state metamodel editor. In the process template configuration and application process, the meta-model dictionary supports the system to query the meta-model and provides the determination results of the equality and inheritance relationships between meta-models. In addition, the metamodel dictionary can also be used for prototype model configuration in the PDM system. In some embodiments, a data table as shown in Figure 3 is used as the metamodel editing interface and dictionary storage carrier.

The process template editing and management module is used for process template configuration, including a template object editor, a template manufacturing target editor, a template logic block editor and a process template library. The template object editor calls the meta model dictionary of the meta model editing and management module to support users to configure template objects based on meta models; the template manufacturing target editor configures template manufacturing targets based on template objects; the template logic The block editor provides template logic block editing and debugging functions based on template objects and template manufacturing targets; the process template library is used to store designed templates and accept calls from process template application modules. In some embodiments, the data table shown in Figure 4 can be used as the template object editor; the data table shown in Figure 5 can be used as the template manufacturing target editor; the data table shown in Figure 6 can be used as the template logic block editor; An ordinary database is used as the process template library, which supports storing a configured set of data tables shown in Figure 4, Figure 5, and Figure 6 as a process template in the ordinary database, and provides management and retrieval information such as template name, template version, etc. Configuration function.

The process template application module is used for retrieving and calling process templates, and includes a process template retrieval unit, a product instance retrieval unit, a template object assignment unit, a process manufacturing target assignment unit, a process generation unit and a process output unit. The process template retrieval unit supports querying process templates that match the manufacturing goals; based on the queried process template, the product instance retrieval unit obtains product instances from the PDM system; based on the obtained attribute values of the product instances, the template object assignment unit is Attribute assignment of the template object; based on the queried process template and the essential purpose of the process design, the process manufacturing target assignment unit selects a unique assignment for the manufacturing target state of the template manufacturing target object; based on the template object assignment and the process manufacturing target assignment, the process The generation unit generates the process; finally, the generated process is output to the CAPP system through the process output unit for further editing and publishing. In some embodiments, the process template application module also includes a process manufacturing target verification unit, which is used to perform process manufacturing target verification on the process generated by the process generation unit to ensure that the process generated by the template call can achieve process manufacturing. target and will not lead to unexpected operational results. The verified process is output to the computer-aided process design system through the process output unit. After the process is generated, the process manufacturing target verification unit reads all the status attributes of the product instance and performs two types of verification: the first is to compare the manufacturing target status in the process manufacturing target with the corresponding status attributes of the product instance. , if the two are consistent, it indicates that the template call can achieve the process manufacturing target, confirm that it passes this verification, otherwise the user will be notified of the unachievable status target; the second is to compare the non-process manufacturing target status with the corresponding status attribute of the product instance Compare the two. If they are consistent, it means that the template call will not cause unexpected product instance status changes. Confirm that this verification is passed. Otherwise, the user will be notified to further determine whether to accept the unexpected changes.

In some embodiments, the table shown in Figure 8 is used as the retrieval result display and assignment editing table for product instance retrieval and template object assignment; the table shown in Figure 9, such as the process manufacturing target table, is used as the process manufacturing target assignment editing table. The template manufacturing targets are also displayed in a table as shown in Figure 5; the table shown in the process generation result table in Figure 9 is used as a display method of the process generation results; the table shown in Figure 11 is used to compare the process manufacturing targets and process generation As a result, compliance is described.

Although the specific embodiments of the present invention have been described in detail above, it should be noted that those skilled in the art can make various equivalent changes and modifications to the above embodiments according to the spirit of the present invention, and the resulting As long as the functional effects do not exceed the spirit covered by the description, they should be within the protection scope of the present invention.

Claims (7)

1. A templated programming method for a spacecraft assembly process driven by a technical state is characterized by comprising the following steps:

step one: the meta model configuration specifically comprises a characteristic meta model configuration, a state meta model configuration and a meta model dictionary configuration;

The content of the feature meta-model comprises a number, a name, a format, a value range and an explanation, wherein the number is unique in a dictionary to which the meta-model belongs; the content of each state meta-model comprises a number, a name, a value field, a default state and a description, wherein the number is unique in a dictionary to which the meta-model belongs; the meta model dictionary is used for storing and managing association relations among meta models; the association relation which can exist among any feature meta-models comprises equality and inheritance; the association relation which can exist among any state meta-models comprises equality and inheritance;

step two: the process template configuration specifically comprises template object configuration, template manufacturing target configuration and template logic block design;

the content of the template object configuration comprises an object type, an object identifier, an object characteristic meta-model set, an object state meta-model set and an object description; wherein the object type shall correspond to the type of spacecraft product represented; the object identifier must be unique within the process template; the feature meta-model contained in the object feature meta-model set is regarded as a feature attribute of the spacecraft product corresponding to the model object, and equal or inheritance relations among the feature meta-models should not exist; the state meta-model contained in the object state meta-model set is regarded as a state attribute of the spacecraft product corresponding to the model object, and equal or inheritance relations among the state meta-models should not exist; the object description is a supplementary text description of the object;

The method for configuring the template manufacturing target comprises the following steps: selecting all or part of template objects of the process template as manufacturing target objects; for each manufacturing target object, selecting all or part of state attributes as manufacturing target states; for each manufacturing target state, configuring a state attribute value that is desirable as a state as a manufacturing target state option for the template user;

the template logic design process comprises the following steps: manufacturing a manufacturing target state combination allowed by target carding according to the template; carding the process operation steps realized by each manufacturing target combination, and dividing the process steps into different template logic blocks; combining the template logic blocks of different manufacturing target combinations to form a template logic frame compatible with all the template manufacturing target combinations; the process text is written to write process operation steps in each template logic block, and corresponding process operation instructions are written; the manufacturing target configuration means that a state attribute value of a template object is configured in a mode of an assignment expression, and the assignment expression has a definite corresponding relation with a process text;

step three: after the process template is applied, namely the process template is called, generating a final assembly process text according to the characteristics and state attributes of the input spacecraft product, the process manufacturing target configuration and the process text combination logic built in the process template logic block; the process template application specifically comprises product instance configuration, template object assignment, process manufacturing target configuration and process generation.

2. The method of claim 1, wherein the combinational logic of the template logic block comprises four relationship forms of serial, hierarchical, selection, and round robin; when two template logic blocks are adjacent and the other three logic relationships are not marked, the serial logic relationship exists between the two template logic blocks by default.

3. The method according to claim 1, wherein in the third step, the product instance configuration selects a feature meta-model set and a state meta-model set which do not have equal or inheritance relationships from the meta-model dictionary, respectively, as a feature attribute set and a state attribute set of the product instance, and then assigns an attribute to make the feature attribute value actually coincide with the product, and make the state attribute value coincide with the state of the spacecraft object before the implementation of the process;

the template object is assigned, the meta-model relation between the template object attribute and the product instance attribute is observed, and if the template object attribute is equal to the product instance attribute or the product instance attribute is inherited to the template object attribute, the value of the product instance attribute is assigned to the template object attribute;

the process manufacturing target configuration selects unique assignment for the manufacturing target states of all template manufacturing target objects according to the substantial purpose of process design;

The process generation is carried out, the template logic blocks are read in according to the sequence, if the logic expression exists in the template logic blocks, whether the process operation text of the logic blocks is effective or not is judged according to whether the logic expression is established or not, and the mode of assembling the process operation text with other template logic block texts is confirmed; meanwhile, if the process operation text has a corresponding manufacturing target expression, assigning a value to the state attribute of the template object according to the expression; after the process is generated, each product instance is assigned, so that the state attribute of the product instance is the same as the state attribute of the corresponding template object.

4. The method of claim 3, wherein the process template application further comprises a process manufacturing target check, when the process is generated, all state attributes of the product instance are read, the manufacturing target states in the process manufacturing target and the corresponding state attributes of the product instance are compared, if the manufacturing target states are consistent with the corresponding state attributes of the product instance, the process manufacturing target is checked, otherwise, a user is informed of the unrealizable state target; comparing the non-process manufacturing target state with the corresponding state attribute of the product instance, if the non-process manufacturing target state and the corresponding state attribute are consistent, confirming that the non-process manufacturing target state and the corresponding state attribute pass the verification, otherwise informing a user to further judge whether the unexpected change is accepted or not.

5. A state-of-the-art driven spacecraft assembly process templated programming system, comprising:

the meta model editing and managing module is used for meta model configuration;

the meta model editing and managing module comprises a characteristic meta model editor for providing characteristic meta model editing and model relation configuration functions, a state meta model editor for providing state meta model editing and model relation configuration functions, and a meta model dictionary for storing configuration results of the characteristic meta model editor and the state meta model editor; the meta model dictionary support system queries the meta models and provides a judging result of equality and inheritance relation among the meta models;

the process template editing and managing module is used for configuring the process templates;

the process template editing and managing module comprises a template object editor, a template manufacturing target editor, a template logic block editor and a process template library; the template object editor invokes the meta model dictionary of the meta model editing and managing module to support a user to configure the template object based on the meta model; the template manufacturing target editor performs template manufacturing target configuration based on a template object; the template logic block editor provides template logic block editing and debugging functions based on a template object and a template manufacturing target; the process template library is used for storing templates which are designed and receiving the call of a process template application module;

And the process template application module for retrieving and calling the process template specifically comprises a process template retrieval unit, a product instance retrieval unit, a template object assignment unit, a process manufacturing target assignment unit, a process generation unit and a process output unit.

6. The programming system of claim 5, wherein the process template retrieval unit supports querying process templates that are consistent with manufacturing goals; based on the queried process template, the product instance retrieval unit acquires a product instance from a product data management system; based on the obtained attribute value of the product instance, the template object assignment unit assigns an attribute of the template object; based on the queried process template, selecting a unique assignment for a manufacturing target state of a template manufacturing target object by a process manufacturing target assignment unit according to the substantial purpose of process design; generating a process by a process generating unit based on the template object assignment and the process manufacturing target assignment; and finally, outputting the generated process to a computer-aided process design system through a process output unit.

7. The programming system of claim 6, wherein the process template application module further comprises a process manufacturing target verification unit for performing a process manufacturing target verification on the process generated by the process generation unit to ensure that the process generated by the template call can achieve the process manufacturing target and does not result in unexpected operation results; and outputting the process after verification to a computer-aided process design system through a process output unit.