Transition

StateMachine for Refrigerant states

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TRAIL: SysML: Simple model of an air conditioner with a refrigerant cycle and StateMachine driven by Activities in MagicDraw/Cameo

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SysML StateMachine Diagram

When the computer is in StandBy, y.sigsp [ERROR] is set to 8, and when the computer is On, y.sigsp [ERROR] is set to 3.

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The transition from On to StandBy has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 0.

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The transition from StandBy to On has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 1 (this is a signal as in signal flow simulation, not as in SysML).

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The transition from the initial pseudostate to StandBy has a relative TimeEvent with an expression indicating that the transition fires 5 seconds after the initial pseudostate is entered.

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Figure 29: State machine in SysML

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Tutorial

SysPhS-1.1 in MagicDraw SysML (or Cameo Systems Modeler) vs Modelica

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SysML Block Definition Diagram (BDD)

SysML StateMachine Diagram

UML/SysML: If you have a Boolean "state flag" attribute corresponding to a State you MUST set it on an 'entry' of the State, not on the 'effect' of a Transition into the State (otherwise with multiple incoming Transitions it could be WET and breaks SSoT).

Screencast: The Webel Digital Twin Pattern for SysML: Part 1: Simulating acquisition or creation of physical assets using Activities and StateMachines in Cameo Simulation Toolkit.

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This video accompanies the following online slide trail:

TRAIL: A SysML Pattern for Digital Twinning

It shows simulation of the acquisition and creation cases for the Webel Twin Pattern for SysML in Cameo Simulation Toolkit^®.

Read more about Screencast: The Webel Digital Twin Pattern for SysML: Part 1: Simulating acquisition or creation of physical assets using Activities and StateMachines in Cameo Simulation Toolkit.

23: Mini StateMachine for DigitalTwin and DoAttach effect Activity

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Tutorial

TRAIL: A SysML Pattern for Digital Twinning

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SysML Activity Diagram

SysML StateMachine Diagram

22: Mini StateMachines for @Entity, PotentialPhysicalAsset, ActualPhysicalAsset

This content has been marked as discussing an ADVANCED topic!

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Tutorial

TRAIL: A SysML Pattern for Digital Twinning

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Slide kind

SysML StateMachine Diagram

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