<\/span><\/h3>\n\n\n\nBlock Definition Diagram (BDD) is an essential tool in systems engineering. BDD helps understand complex systems and simplifies the design process by visualizing the structure of the system and the relationships between each component. These diagrams are particularly important in clearly defining the function of a block and its structural relationships with other blocks, effectively representing the basic components of the system and their interactions.<\/p>\n\n\n\n
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<\/span>Detailed description of the main model elements of BDD<\/strong><\/span><\/h3>\n\n\n\n\n- Blocks : <\/strong>Blocks are the basic units that make up a system and can be physical parts or abstract concepts. Each block performs a specific function within the system, and its relationships with other blocks allow us to understand the structure of the overall system.<\/li>\n\n\n\n
- Actors : <\/strong>Actors are entities that interact with the system, representing users or other systems outside the system. Actors help us understand how a system is connected to the outside world.<\/li>\n\n\n\n
- Value Types : <\/strong>Value types define the type of data used within a system and its characteristics. This is essential to clarify the type and format of information that the system must process. <\/li>\n\n\n\n
- Constraint Blocks : <\/strong>Constraint blocks represent constraints that a system or block must adhere to. This element explicitly expresses important limitations and requirements in the design of the system so that the designer can take them into account.<\/li>\n\n\n\n
- Flow Specification : <\/strong>Flow specifications define how data or energy moves within a system. This is important to understand how the system behaves and the interactions between each component. <\/li>\n\n\n\n
- Interfaces : <\/strong>Interfaces describe how different blocks interact. This is an essential element for the integration and function of the system by clearly showing how each block exchanges information and interconnects.<\/li>\n<\/ol>\n\n\n\n
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<\/span>Detailed description of structural relationships in BDD<\/strong><\/span><\/h3>\n\n\n\n\n- Associations : <\/strong>A connection represents a relationship between two blocks and shows how they are connected to each other. For example, the connections between the engine block and transmission block help visualize how the two system parts interact. Connections may involve information, energy, or physical links. <\/li>\n\n\n\n
- Generalizations : <\/strong>Generalization shows that one block is a special form of another block. This is often expressed as an inheritance structure, meaning the passing of properties and functionality from a more general block to a specialized block. For example, if the ‘vehicle’ block is a general concept, the ‘electric vehicle’ block can be seen as a special type of vehicle. Generalization allows you to construct a hierarchical structure of the system and facilitate code reuse and maintenance.<\/li>\n\n\n\n
- Dependencies : <\/strong>Dependency refers to a relationship in which one element depends on the definition, implementation, or behavior of another element. Dependencies are important for understanding the impact of changes, allowing you to predict how changes in one element will affect other elements. For example, if a sensor’s output data is used as input to an engine control system, changes to the sensor can directly affect engine control.<\/li>\n<\/ol>\n\n\n\n
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<\/span>Model element types in BDD diagram frames<\/strong><\/span><\/h3>\n\n\n\n\n- Package : <\/strong>Packages are used to manage related elements by logically grouping them. It organizes various parts of the system systematically and makes it easier to manage. In BDD, packages are one of the most commonly used frame types.<\/li>\n\n\n\n
- Model : <\/strong>A model represents the overall structure of a system or subsystem. It is used to comprehensively represent the main concepts and relationships of a system.<\/li>\n\n\n\n
- ModelLibrary (Model Library) : <\/strong>Model libraries are used to store reusable model elements. This enables efficient model management and element recycling.<\/li>\n\n\n\n
- View : <\/strong>A view focuses on handling a specific aspect of the model. This allows detailed analysis or description of specific parts of the system.<\/li>\n\n\n\n
- Block : <\/strong>Blocks represent the basic components of a system, with each block performing a specific function within the system.<\/li>\n\n\n\n
- ConstraintBlock :<\/strong> Constraint blocks define constraints necessary for the operation of the system. This clearly presents constraints that must be considered when designing the system.<\/li>\n<\/ol>\n\n\n\n
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