Block Definition Diagram Example: HSUV Structure - Power Subsystem

The best way to understand Block Definition Diagram is to look at some examples of Block Definition Diagram and start drawing your own. You can now modify the Block Definition Diagram example below using Visual Paradigm's online Block Definition Diagram tool.

SysML: Block Definition Diagram

The block definition diagram is considered one of the most important diagrams in the Systems Modeling Language (SysML), which was derived from the class diagram of the Unified Modeling Language (UML). The block definition diagram is used to define blocks and the relationships between them such as their hierarchical relationship. It also describes the flow of data between the components from a black-box perspective.

In large systems, the components are often decomposed into functions or subsystems. Block definition diagrams define the components of a system, the flow of information between components, and have the following parts:

  • Block contains parts and might also include links inside a block.
  • Part are connected to the block by composition.
  • Actors are the external interfaces to the system.
  • Standard Port is a distinct interaction point between a class, part, or block and its environment.
  • Flow-Port is an interaction point through which objects can flow into or out of the system module.
  • Dependency shows dependency relationships, such as when changes to the definition of one element affect another element.
  • Flow specifies the exchange of information between system elements at a high level of abstraction.

Another SysML diagram can be used to display the internal structure of a single block: the internal block diagram.

How to create a Block Definition Diagram?

Block Definition Diagram can be easily created using a professional Block Definition Diagram software like Visual Paradigm Online:

  1. Create a new Block Definition Diagram.
  2. The stencil provides a rich set of Block Definition Diagram symbols you need to construct your diagram. Just drag and drop the symbols you need to your diagram and connect them with connector lines.
  3. When you finished, you can save the diagram (File > Save as) to our cloud repository for future access. You can also export your work into image (JPG, PNG, PDF, SVG, etc) and share it with your friends or co-workers.

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