SysML Parametric Models

SysML Parametric models support the engineering analysis of critical system parameters, including the evaluation of key metrics such as performance, reliability and other physical characteristics.

Topics

Topic

Detail

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SysML Parametric Models - Concept

SysML Parametric Models unite requirements models with system design models by capturing executable constraints based on complex mathematical relationships.

The following text is derived from the SysML entry in the online Wikipedia.

The advantages of SysML over UML for systems engineering become obvious if you consider a concrete example, such as modeling an automotive system. With SysML you can use Parametric diagrams to precisely define performance and mechanical constraints such as maximum acceleration, curb weight, air conditioning capacity, and interior cabin noise management.

For further information on the concepts of SysML Parametric models, refer to the official OMG SysML website and its linked sources.

Enterprise Architect enables you to develop SysML Parametric models quickly and simply; these models can also be simulated.

 

SysML (Online Resource)

OMG SysML (Online Resource)

Create a Parametric model

Step

Action

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1

Create a collection of SysML Constraint Blocks that formally describe the function of a constraint in a simulation model.

Each Constraint Block contains properties that describe its input and output parameters, as well as Element Script that describes the constraint's executable component.

 

sysml_constraint_block

 

 

2

Right-click on each of the constraintBlocks and select the SysML | Add Element Script context menu option to add script to the constraint block.

This is where you express the relationship / behavior of the constraint block as an executable script.

 

 

3

Create a SysML Constraint Block to contain the Parametric model to simulate; the Parametric model contains properties and occurrences of constraint blocks as Constraint Property elements, connected in a Parametric Diagram.

 

sysml_parametric_diagram

 

 

4

Right-click within a Parametric Diagram and select the SysML | Simulate Diagram... context menu option.

 

 

5

Depending on your configuration selections, the simulation's results are either written to a comma-separated CSV file or graphed in a 2-dimensional plot.

 

sysml_simulation_results

 

 

Notes

Systems Modeling Language (SysML) is provided with the Systems Engineering and Ultimate editions of Enterprise Architect

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