CN113505438B - Technical state driven spacecraft final assembly process templated programming method and system - Google Patents
Technical state driven spacecraft final assembly process templated programming method and system Download PDFInfo
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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
Technical Field
The invention belongs to the technical field of manufacturing and assembly, and particularly relates to a technical state driven spacecraft assembly process programming method and system.
Background
The spacecraft assembly is the integrated assembly and test of the spacecraft product subsystem. For large spacecraft products such as newly-researched satellites and airships, the design, assembly and testing processes of the products are not shaped after the large spacecraft products enter the assembly stage, and the supply chain of parts is not mature. Under the situation, product designers and process designers need to respectively carry out continuous design adjustment and optimization iteration on products and processes according to trial assembly, functional test, performance test results, and frequent events such as untimely development and delivery of parts, conflict in production resource allocation, time node compression caused by large system coordination and the like. Such adjustments involve repeated switching of the product assembly state and need to be clearly defined in the final assembly process. However, due to the urgent development task of the newly developed spacecraft, the single-piece developed spacecraft process is difficult to directly reuse, and a new process design method with high efficiency and clear definition on the state of the product assembly process is urgently needed.
In the manufacturing industry, the traditional process text prefers to require geometric and precision parameters of manufacturing formation, and the assembly state is less taken as a main manufacturing target. In recent years, a series of breakthroughs are made by the application of new technologies such as artificial intelligence, digital twinning and the like in manufacturing process design: the artificial intelligence technology is widely applied to the optimization field of process routes and process parameters, and adopts a big data statistics method to optimize the manufacturing performance of equipment, save the manufacturing cost and analyze the cause of quality problems; the digital twin technology is widely applied to manufacturing process monitoring, and the cooperation service between design and production is optimized. However, an effective design method for the final assembly process is still lacking, the contradiction between the requirement for setting the state of a large-scale process and the preparation time of the urgent process is not solved, and the problem of large-scale application of a universal process template in the final assembly stage of the extremely personalized spacecraft is not solved.
The name of the invention is "spacecraft process template and realizing system, method and application thereof," the invention patent with application number of CN201910441181.4, which is declared by Beijing satellite manufacturing plant Limited company, adopts a parameterization method to realize automatic filling of different product attributes in the process template, but can not solve the problem of differential automatic generation of similar products with different characteristics when the same template is applied, and also has no content related to the technical state setting of the products. The invention patent with the name of ' knowledge-based assembly process design method, system and medium ' and application number of CN201911076823.1 ' filed by Shanghai satellite equipment institute provides a set of assembly process knowledge modeling and process knowledge rapid generation method which comprises logic extraction and logic organization of an assembly process, but lacks of structural description and visual feedback of the general assembly technical state.
Disclosure of Invention
The invention aims to provide a technical state driven spacecraft assembly process template programming method and system, which are used for solving the problem that a general process template in the prior art cannot be reused in a large scale in an extremely personalized spacecraft assembly stage, and can support batch generation of assembly processes of a plurality of personalized products and personalized setting of the technical state based on the same process template, thereby better meeting the requirements of the spacecraft assembly stage on diversification and quick response control of the technical state of the products.
In order to achieve the above purpose, the invention provides a templatization programming method for a spacecraft assembly process driven by a technical state, which comprises the following steps:
step one: and (5) meta-model configuration. The meta-model is a basic unit for expressing the characteristics of the spacecraft product, and is stored in a meta-model dictionary after configuration. The meta-model configuration includes three aspects:
(1) Feature meta-model configuration: the feature metamodel is used for describing physical features of the spacecraft product, and each feature metamodel comprises a number, a name, a format, a value field, a description and the like, wherein the number is unique in a dictionary to which the metamodel belongs.
(2) State meta-model configuration: the state metamodel is used for describing the possible states of the spacecraft product in the assembly process, and each state metamodel comprises a number, a name, a value range, a default state, a description and the like, wherein the number is unique in a dictionary to which the metamodel belongs.
(3) Meta model dictionary configuration: 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 relationships that can exist between any state metamodels include equality and inheritance.
Step two: and (5) configuring a process template. A process template is a literal description framework for implementing specific process operation on one or more objects of a specified type, and comprises three contents of a template object, a template manufacturing target and a template logic block. The configuration of the process template includes three aspects:
(1) Template object configuration: the template object is used to represent a spacecraft product. The template object comprises the contents of an object type, an object identifier, an object characteristic meta-model set, an object state meta-model set, an object description and the like. The template object configuration is to configure the content contained in the template object, wherein: the object type should 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; an object description is a supplementary literal description of the object, and may include the specific meaning of the object, the context in which the object is referenced in the template, and so on.
Optionally, the template object configuration may also configure a template object array, which contains a plurality of identical template objects.
(2) Template manufacturing target configuration: template manufacturing targets describe manufacturing target objects and manufacturing target states supported by a process template. 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, a state attribute value that is desirable as a state is configured as a manufacturing target state option for the template user.
Alternatively, the process template may set a default set of manufacturing targets as default options for template users to configure the manufacturing targets.
(3) Template logic block design: the template logic block is a description unit of process operation contents and content organization logic, and contains text for describing process operations, a manufacturing target expression corresponding to the text, and a logic expression representing combination logic among the template logic blocks.
Optionally, the combinational logic of the template logic block includes four relationship forms of serial, hierarchical, selection, and circulation. Serial logic indicates that execution constraint exists between two template logic blocks, and after the operation of the former template logic block is executed, the operation of the latter template logic block is allowed to be executed; when two template logic blocks are adjacent and the other three logic rules are not marked, the serial logic exists between the two template logic blocks by default. The hierarchical logic indicates that father-son relation constraint exists among the template logic blocks, and when the operation of the sub-module is completed, the operation returns to the father module to continue to be executed; selection logic means that when a template is applied, different template logic blocks are enabled only under decision conditions. Each group of selection branches should be regarded as a template logic block, and the template logic block comprises a plurality of groups of submodules and judgment condition configuration. The determination condition is configured based on a function having a template object attribute/state or a template manufacturing target state as a parameter; when the loop logic indicates the template application, the same template logic block content is repeated continuously under the condition that the judging condition is met, and the loop logic is organized by serial logic. The decision condition is configured based on a function having a template object attribute/state or a template manufacturing target state as a parameter, and the circulated content should be regarded as one template logic block.
The template logic block design comprises three contents of template logic design, process text composition and manufacturing target configuration. 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; and combining the template logic blocks of different manufacturing target combinations to form a template logic framework compatible with all the template manufacturing target combinations. And writing the process text to write the process operation steps in each template logic block and writing the corresponding process operation instructions. 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 clear corresponding relation with a process text.
Step three: and after the process template application, namely the process template is called, generating a final assembly process text according to the input characteristics and state attributes of the spacecraft product, the process manufacturing target configuration and the process text combination logic built in the process template logic block.
The specific implementation method of the process template application comprises the following steps:
(1) Product instance configuration: the user configures the product instance before using the template. The specific method is that a characteristic meta model set and a state meta model set which do not have equal or inheritance relations are selected from the meta model dictionary respectively to serve as a characteristic attribute set and a state attribute set of a product instance, then attribute assignment is carried out on the attribute, the characteristic attribute value is enabled to be in actual conformity with the product, and the state attribute value is enabled to be in conformity with the state of a spacecraft object before the process is implemented.
(2) Template object assignment: template object assignment refers to copying the attribute values of the spacecraft product instance to the attribute values of the template object. When assigning, the meta-model relation between the template object attribute and the product instance attribute is observed, 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; when assigning values to the template object array, after confirming the number of the template objects contained in the array, the assignment operation of each template object in the array is the same as the method.
(3) The 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 the template manufacturing target objects according to the substantial purpose of the process design. Specifically, if the original template manufacturing target contains an array of template objects, then the process manufacturing target for each array member needs to be configured after the template object array is assigned.
(4) And (3) process generation: reading in the template logic blocks according to the sequence after the generation process is started, judging whether the process operation text of the logic blocks is effective or not according to whether the logic expression is established or not if the logic expression exists in the template logic blocks, and confirming the assembly mode of the process operation text and other template logic block texts; synchronously, if the process operation text has a manufacturing target expression corresponding to the process operation text, the state attribute of the template object is assigned 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.
Optionally, the process template application further includes process manufacturing target verification to ensure that the process generated by the template call is able to achieve the process manufacturing target and does not result in unexpected operational results. The process manufacturing target check specifically comprises the following steps: after the process is generated, all state attributes of the product instance are read, and two kinds of verification are performed: the first is to compare the manufacturing target state in the process manufacturing target with the corresponding state attribute of the product instance, if the two are consistent, the template call can realize the process manufacturing target, and confirm the verification, otherwise, inform the user of the unrealizable state target; and secondly, 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, indicating that the template call cannot cause the state change of the product instance beyond expectation, confirming that the verification is passed, otherwise informing a user to further judge whether the non-expected change is accepted.
On the other hand, the invention provides a technical state driven spacecraft assembly process templet programming system, which comprises a meta-model editing and management module, a process template editing and management module and a process template application module. The meta model editing and managing module is used for meta model configuration and comprises a characteristic meta model editor used for providing characteristic meta model editing and model relation configuration functions, a state meta model editor used for providing state meta model editing and model relation configuration functions and a meta model dictionary used for storing configuration results of the characteristic meta model editor and the state meta model editor. In the process template configuration and application links, the meta model dictionary support system queries the meta models and provides the judgment results of equality and inheritance relations among the meta models. The meta-model dictionary may also be used for prototype model configuration in a product data management (Product Data Management, PDM) system.
The process template editing and managing module is used for configuring the process templates and 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 the process template application module.
The process template application module is used for retrieving and calling a process template and comprises a process template retrieving unit, a product instance retrieving unit, a template object assigning unit, a process manufacturing target assigning unit, a process generating unit and a process output unit. The process template retrieval unit supports inquiring process templates with consistent manufacturing targets; based on the queried process template, the product instance retrieval unit obtains a product instance from a Product Data Management (PDM) 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; finally, the generated process is output to a computer aided process design (Computer Aided Process Planning, abbreviated as CAPP) system through a process output unit, and further editing and release are carried out by the system.
Optionally, the process template application module further includes a process manufacturing target verification unit for performing process manufacturing target verification on the process generated by the process generation unit, so as to ensure that the process generated by the template call can achieve the process manufacturing target and does not cause unexpected operation results. And outputting the process after verification to the CAPP system through a process output unit. After the process is generated, the process manufacturing target verification unit reads all state attributes of the product instance, and performs two types of verification: the first is to compare the manufacturing target state in the process manufacturing target with the corresponding state attribute of the product instance, if the two are consistent, the template call can realize the process manufacturing target, and confirm the verification, otherwise, inform the user of the unrealizable state target; and secondly, 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, indicating that the template call cannot cause the state change of the product instance beyond expectation, confirming that the verification is passed, otherwise informing a user to further judge whether the non-expected change is accepted.
The invention realizes the rapid setting and generation of the technical state of the product and the matched process text based on the combination of the multi-layer logic blocks taking the attribute and the technical state value of the product as logic judgment conditions; according to the invention, modeling of spacecraft products and template objects is carried out based on the meta model, so that the process templates can be rapidly reused under different product model systems of different spacecraft, and the problems of accumulation and reuse of process knowledge in a single-piece small-batch development mode are effectively solved; the invention takes the technical state requirement of the product as the template manufacturing target to configure, assembles the process text through the technical state driving process template, and can generate the processes corresponding to various manufacturing targets by using the same template, thereby being more applicable to the control requirement of the spacecraft assembly stage on the diversification of the technical state of the product and quick response.
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 only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the following figures:
FIG. 1 is a schematic diagram of method steps of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system architecture according to an embodiment of the present invention;
FIG. 3 is a diagram of an exemplary meta-model configuration of an embodiment of the present invention;
FIG. 4 is a diagram of an example configuration of a process template object according to an embodiment of the present invention;
FIG. 5 is a diagram of an exemplary configuration of a process template manufacturing target in accordance with an embodiment of the present invention;
FIG. 6 is a diagram of an exemplary design of a process template logic block in accordance with an embodiment of the present invention;
FIG. 7 is a schematic illustration of an example spacecraft product of an embodiment of the invention;
FIG. 8 is an exemplary diagram of product instance configuration and template object assignment for an embodiment of the present invention;
FIG. 9 is a diagram showing an example of process manufacturing target setting and process generation results for a formal equipment installation according to an embodiment of the present invention;
FIG. 10 is a diagram showing an example of process manufacturing target setting and process generation results for temporary equipment installation according to an embodiment of the present invention;
FIG. 11 is an exemplary graph of process manufacturing target verification results according to an embodiment of the present invention.
In fig. 7, 1 is a device 001,2, a deck 001,3, a screw 001,4, a screw 002,5, a screw 003,6, a screw 004,7, a washer 001,8, a washer 002,9, a washer 003, 10 is a washer 004, 11 is a ground wire 001,12, and a nut 001.
In fig. 9, 901 is a schematic diagram of the result of the regular installation of the equipment, 902 is a process manufacturing target table corresponding to the regular installation of the equipment, and 903 is a corresponding process table generated.
In fig. 10, 101 is a schematic diagram of the result of temporary equipment installation, 102 is a process manufacturing target table corresponding to temporary equipment installation, and 3 is a generated corresponding process table.
Detailed Description
The present invention will be further elucidated by means of the following embodiments. The following detailed description is, of course, merely illustrative of various aspects of the invention and should not be taken as limiting the scope of the invention.
With the satellite assembly as an application background, one specific embodiment of the invention is as follows:
as shown in fig. 1, the templated programming method of the spacecraft assembly process driven by the technical state provided by the invention comprises three steps:
step one: and (5) meta-model configuration. In the method, the meta model is a basic unit for expressing the characteristics of the spacecraft product, and is stored in a meta model dictionary after configuration. The meta-model configuration includes three aspects:
(1) Feature meta-model configuration: the feature metamodel is used for describing physical features of the spacecraft product, and each feature metamodel comprises a number, a name, a format, a value field, a description and the like. The number is unique in the dictionary to which the meta-model belongs. A set of feature meta-model configurations in the method of this embodiment is shown in fig. 3.
(2) State meta-model configuration: the state metamodel is used for describing the possible states of the spacecraft product in the assembly process, and each state metamodel comprises the contents of a number, a name, a value field, a default state, a description and the like. The number is unique in the dictionary to which the meta-model belongs. A set of state meta-model configurations in the method of the present embodiment is shown in fig. 3.
(3) Meta model dictionary configuration: 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 existing between any state metamodels comprises equality and inheritance. If metamodel C inherits from B, B inherits from A, then metamodel C inherits from A can be inferred through the dictionary. But does not allow for a loop configuration, i.e., it cannot be inferred that "metamodel a inherits from B, and metamodel B inherits from a". As shown in fig. 3, in the feature meta model dictionary, the present embodiment configures "specification" (TZ 006) and "model" (TZ 009) in equal relation, and configures "fastener arming" (TZ 012) and "electrical connector arming" (TZ 013) both inherit from "arming" (TZ 011); in the state meta model dictionary, "soldering" (ZT 008) and "soldering" (ZT 009) are configured as equal relations.
Step two: and (5) configuring a process template. In the invention, a process template is a text description framework for implementing specific process operation on one or more objects of a specified type, and comprises three contents of a template object, a template manufacturing target, a template logic block and the like. Accordingly, the configuration of the process template includes three aspects:
(1) Template object configuration: the template object is used to represent a spacecraft product. The template object comprises the contents of an object type, an object identifier, an object characteristic meta-model set, an object state meta-model set, an object description and the like. The template object configuration is to configure the content contained in the template object, wherein: the object type should 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 template 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 template object, and equal or inheritance relations among the state meta-models should not exist; the object description is a supplementary text description of the template object, and may include a specific meaning of the template object, a context in which the template object is referenced in the template, and the like.
In some embodiments, instead of configuring a single template object, an array of template objects may be configured, the array containing a plurality of identical template objects pending in number. As shown in fig. 4, 6 template objects are configured in total, wherein the specific number of "screws" (LD) and "shims" (DP) can be obtained according to the product instance at the time of the template application, so that they are configured as an array.
(2) Template manufacturing target configuration: the process manufacturing objective refers to the state expectations of the spacecraft product being operated upon after performing the process operation. According to the invention, a template user realizes configuration of a process manufacturing target by presetting an expected value of a spacecraft product state attribute, and drives the template to generate a process consistent with the manufacturing target through the process manufacturing target. The template manufacturing target describes a manufacturing target object and a manufacturing target state supported by the process template corresponding to the process manufacturing target. The method for configuring the template manufacturing target comprises the following steps: selecting all or part of template objects (including template object arrays) 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, a state attribute value that is desirable as a state is configured as a manufacturing target state option for the template user. As shown in fig. 5, the template of the method of the present embodiment is configured with 3 sets of template manufacturing targets, and the apparatus, the screws, the gaskets, the ground wire, and the nuts are used as the template manufacturing target objects, and part or all of the state attributes thereof are used as template manufacturing target states in the three sets of template manufacturing targets, respectively. The deck is not configured to manufacture the target object.
In some embodiments, the process template may set a default set of manufacturing targets as a default option when the template user configures the manufacturing targets.
(3) Template logic block design: in the present invention, a template logic block is a description unit of process operation contents and contents organization logic, and includes text for describing process operations, a manufacturing target expression corresponding to the text, and a logic expression representing combinational logic between template logic blocks. The combination logic of the template logic blocks has four forms of serial, hierarchical, selection and circulation:
serial logic indicates that there is a constraint of execution between two template logic blocks, and the operation of the former template logic block is allowed to be executed only after the operation of the former template logic block is executed. When two template logic blocks are adjacent and the other three logic rules are not marked, the serial logic exists between the two template logic blocks by default. As shown in the template logic block example of fig. 6 and the corresponding two sets of process generation results (fig. 9 and 10), each template logic block is affected by the combinational logic of hierarchy, selection, circulation and the like when the template is applied, but the generation results are still arranged in sequence from small to large according to the sequence numbers of the logic blocks of each hierarchy.
The hierarchical logic indicates that father-son relation constraint exists among the template logic blocks, and when the operation of the sub-module is completed, the operation returns to the father module to continue to be executed. As shown in fig. 6, the template has a 3-layer structure in total. For example, logical block 1 and logical blocks 1-2-1-6 are in parent-child relationship, and logical blocks 1-5-1, 1-5-2 are in parent-child relationship.
Selection logic means that when a template is applied, different template logic blocks are enabled only under decision conditions. Each group of selection branches should be regarded as a template logic block, and the template logic block comprises a plurality of groups of submodules and judgment condition configuration. The determination condition is configured based on a function having a template object attribute/state or a template manufacturing target state as a parameter. As shown in fig. 6, the logic blocks 1, 1-2, 1-3, 1-4, 1-5-1, 1-5-2, 1-6-1, 1-6-2, 2-1 are template logic blocks having selection logic, and are expressed by "if (expression)": 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.
When the loop logic indicates the template application, the same template logic block content is repeated continuously under the condition that the judging condition is met, and the loop logic is organized by serial logic. The decision condition is configured based on a function having a template object attribute/state or a template manufacturing target state as a parameter, and the circulated content should be regarded as one template logic block. As shown in fig. 6, each of the logic blocks 1-1, 1-5, and 2-1-1 is a template logic block having loop logic, and is expressed by "foreach (template object)": traversing the template object array members, and generating one pass by the circulated content in each traversing.
The template logic block design comprises three contents of template logic design, process text composition and manufacturing target configuration, and the process is as follows:
first, the allowable manufacturing target state combinations are combed according to the template manufacturing target. As shown in fig. 5, there are 3 sets of manufacturing target states such as "formal equipment installation", "temporary equipment installation", "demolition equipment", etc.;
the process steps implemented for each manufacturing target combination are then carded and partitioned into different template logic blocks. As shown in fig. 6, the logical blocks corresponding to the "formal equipment installation" are all logical blocks governed by the logical block 1; the logic blocks corresponding to the temporary equipment installation are 1-1 and 1-5 in the logic block 1; the logic blocks corresponding to the dismantling equipment are all logic blocks governed by the logic block 2. In the embodiment of the invention, in order to reduce the scale of the module, a plurality of manufacturing targets are allowed to share the same logic block content, and different manufacturing target logics are routed through the if on the state requirement of the manufacturing targets.
The template logic blocks of the different manufacturing target combinations are then combined to form a template logic framework compatible with all the template manufacturing target combinations, as shown in fig. 6.
The process text composition refers to the process operation steps in each template logic block, corresponding process operation description is composed, and the editing effect is shown in a column of the process operation text of the table in fig. 6.
The manufacturing target configuration refers to the mode of configuring the state attribute value of the template object by adopting an assignment expression, the assignment expression has clear corresponding relation with the process text, and the configuration effect is shown in a column of a table 'manufacturing target expression' in fig. 6.
Step three: and (5) applying a process template. The process template application refers to that after the process template is called, final assembly process text is generated according to the characteristics and state attributes of the input spacecraft product, process manufacturing target configuration and process text combination logic built in a process template logic block. The embodiment applies a process template to the installation working condition of the equipment shown in fig. 7 to generate a formal installation process and a temporary installation process of the equipment, and the specific implementation method comprises the following steps:
(1) Product instance configuration: the user configures the product instance shown in fig. 7 before using the template. The specific method is that a characteristic meta model set and a state meta model set which do not have equal or inheritance relations are selected from the meta model dictionary respectively to serve as a characteristic attribute set and a state attribute set of a product instance, then attribute assignment is carried out on the attribute, the characteristic attribute value is enabled to be in actual conformity with the product, and the state attribute value is enabled to be in conformity with the state of a spacecraft object before the process is implemented. The configuration results are shown in the "product instance configuration" section of fig. 8.
(2) Template object assignment: template object assignment refers to copying the attribute values of the spacecraft product instance to the attribute values of the template object. When assigning, the meta-model relation between the template object attribute and the product instance attribute is observed, 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; when assigning values to the template object array, after confirming the number of the template objects contained in the array, the assignment operation of each template object in the array is the same as the method. The configuration result is shown in the "template object assignment" part of fig. 8, and compared with the "product instance configuration" part on the left side of fig. 8, the mapping relationship between two groups of object instances can be intuitively seen.
(3) The 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 the template manufacturing target objects according to the substantial purpose of the process design. Specifically, if the original template manufacturing target contains an array of template objects, then the process manufacturing target for each array member needs to be configured after the template object array is assigned. As shown in fig. 9 and 10, the process manufacturing targets of "formal equipment installation" and "temporary equipment installation" are respectively configured in detail.
(4) And (3) process generation: reading in the template logic blocks according to the sequence after the generation process is started, judging whether the process operation text of the logic blocks is effective or not according to whether the logic expression is established or not if the logic expression exists in the template logic blocks, and confirming the assembly mode of the process operation text and other template logic block texts; synchronously, if the process operation text has a manufacturing target expression corresponding to the process operation text, the state attribute of the template object is assigned according to the expression. As shown in fig. 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, so that the state attribute of the product instance is the same as the state attribute of the corresponding template object, namely, the operation result of the template on the product state is saved back into the product instance.
In some embodiments, the process template application further includes process manufacturing target verification to ensure that the process generated by the template call is able to achieve the process manufacturing target and does not result in unexpected operational results. The process manufacturing target check specifically comprises the following steps: after the process is generated, all state attributes of the product instance are read, and two kinds of verification are performed: the first is to compare the manufacturing target state in the process manufacturing target with the corresponding state attribute of the product instance, if the two are consistent, the template call can realize the process manufacturing target, and confirm the verification, otherwise, inform the user of the unrealizable state target; and secondly, 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, indicating that the template call cannot cause the state change of the product instance beyond expectation, confirming that the verification is passed, otherwise informing a user to further judge whether the non-expected change is accepted. In this embodiment, the "manufacturing target expression" in the "process generation result" shown in fig. 9 or fig. 10 is compared with the "process manufacturing target" on the left side to determine whether the item is missing, multiple items or wrong item, and the comparison result is shown in fig. 11.
The technical state driven spacecraft assembly process templated programming system provided by the invention is shown in fig. 2, and is used for realizing the flow and functions contained in the method in a software mode. The compiling system comprises a meta model editing and managing module, a process template editing and managing module and a process template application module.
The meta model editing and managing module is used for meta model configuration and comprises a characteristic meta model editor used for providing characteristic meta model editing and model relation configuration functions, a state meta model editor used for providing state meta model editing and model relation configuration functions and a meta model dictionary used for storing configuration results of the characteristic meta model editor and the state meta model editor. In the process template configuration and application links, the meta model dictionary support system queries the meta models and provides the judgment results of equality and inheritance relations among the meta models. Furthermore, the metamodel dictionary may also be used for prototype model configuration in a PDM system. In some embodiments, a data table as shown in FIG. 3 is employed as the metamodel editing interface, as well as the dictionary storage carrier.
The process template editing and managing module is used for configuring the process templates and 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 the process template application module. In some embodiments, a data table as shown in FIG. 4 may be employed as a template object editor; manufacturing a target editor using the data table as shown in fig. 5 as a template; the data table shown in fig. 6 is adopted as a template logic block editor; the common database is used as a process template library, a set of configured data table sets shown in fig. 4, 5 and 6 are supported to be stored in the common database as a process template, and configuration functions of template name, template version and the like for managing and retrieving information are provided.
The process template application module is used for retrieving and calling a process template and comprises a process template retrieving unit, a product instance retrieving unit, a template object assigning unit, a process manufacturing target assigning unit, a process generating unit and a process output unit. The process template retrieval unit supports inquiring process templates with consistent manufacturing targets; based on the queried process template, the product instance retrieval unit acquires a product instance from a PDM 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 CAPP system through a process output unit, and further editing and publishing the process. In some embodiments, the process template application module further includes 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 is capable of achieving 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. After the process is generated, the process manufacturing target verification unit reads all state attributes of the product instance, and performs two types of verification: the first is to compare the manufacturing target state in the process manufacturing target with the corresponding state attribute of the product instance, if the two are consistent, the template call can realize the process manufacturing target, and confirm the verification, otherwise, inform the user of the unrealizable state target; and secondly, 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, indicating that the template call cannot cause the state change of the product instance beyond expectation, confirming that the verification is passed, otherwise informing a user to further judge whether the non-expected change is accepted.
In some embodiments, the table shown in fig. 8 is used as a product instance search and template object assignment search result display and assignment editing table; the table shown in the process manufacturing target table in fig. 9 is adopted as a process manufacturing target assignment editing table, and at this time, the template manufacturing target is also displayed in the form shown in fig. 5; adopting a table shown in a process generation result table in FIG. 9 as a display mode of a process generation result; compliance is described using the table shown in fig. 11 to compare process manufacturing goals with process results.
While specific embodiments of the invention have been described and illustrated in detail, it should be apparent that modifications and adaptations of the embodiments described above can occur to those skilled in the art without departing from the spirit of the invention and the scope of the invention is intended to be covered by the claims.
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.
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