SysML Activity Diagram

[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

The Shah 1982 CHART correlation for saturated boiling heat transfer as SysML Activity Diagrams (1)

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SECTION: Miscellaneous examples of applications of Webel libraries for Mathematica to air conditioners and heat exchangers. With SysMLv1 models.

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

Webel: SysML4Mathematica: Activity Diagrams used purely for analysis and as development aids are not required to show every ControlFlow, may omit InitialNode and ActivityFinalNode, and are not required to fully validate in SysML tools or execute.

About «pseudo» blocks (always prefixed with ‘@’)

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

Extract Options from an OptionsPattern[] in a SysML Activity (2) DETAILED

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

Extract Options from an OptionsPattern[] in a SysML Activity (1)

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

Webel: Mathematica: CONVENTION: The Stereotype keyword «functional» indicates a "pseudo functional" representation of functional in SysML. There are limits to representation of functional programming in SysML, but it can be informative and is worth doing.

The sigsUp function with OptionsPattern modelled as a SysML Activity (and with "pseudo functional" representation)

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

The Webel '$opt$' option "help holder" convention

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: The Webel '$opt$' and '$arg$' help holder conventions for options and arguments in the Wolfram Language

SysML Activity with @pseudo functions capturing Wolfram Language logic

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

SysML/UML ExpansionRegion for iteration (as adapted for use with Mathematica)

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

SysML Activities as function networks (simple contrived Real maths example)

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

Example: Representation of a Webel MAll class MTools method as a SysML Activity Diagram

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[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.

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SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions

Webel: SysML: SE: A functional analysis «whitebox» Activity may have swimlanes that Allocate to logical subsystems (logical handlers) within the 'problem' zone or to design/implementation level blocks.

Webel: SysML: SE: The custom Stereotype keyword «whitebox» applied to an Activity indicates that it is part of the functional analysis breakdown serving a «whitebox» «scenario» Activity (directly or indirectly) for a UseCase.

Webel: SysML: SE: «blackbox»: The custom Stereotype keyword «scenario» indicates a Behavior (Interaction as Sequence Diagram or Activity) that Refines a top-level UseCase within the 'problem' zone.

Webel: SysML: SE: Terminology: '«logical» handler' is used for a specific kind of «logical» subsystem (aka 'conceptual subsystem') that is a SPECIFIC collaboration of parts that handle one Activity usage in a higher level «whitebox» Activity.

HOWTO "cheat" with two-level white-boxing and tracking stereotypes because you just don't want that darn "extra" logical subsystem (conceptual subsystem) Block the systems engineers reckon you are supposed to use (and why it's easier to actually use one)

Webel: SysMLv1: Functional analysis (isolation of white-box Activities identified via «blackbox» scenario Activities of UseCases). Recommend custom stereotype them. Candidate: «whitebox» (or a recommended SE methodology stereotype).

SysML: Cameo/MagicDraw: ItemFlow notation/indication on ObjectFlow edges in SysML Activity Diagrams is a tool-specific feature, although it was proposed and discussed (but DEFERRED) as part of the OMG SysMLv1 Revision Task Force (RTF).

SysMLv1: MagicDraw/Cameo: Having a SystemContext as the 'subject' of each main UseCase plays nicely with the feature for automated creation of usage-level allocation swimlanes in SysML Activity Diagrams for part properties. But it's not the only way.

SysMLv1: MagicDraw/Cameo: Automated creation of usage-level allocation swimlanes in SysML Activity Diagrams for part properties of a Block. EXAMPLE: A UseCase scenario within a SystemContext as UseCase ‘subject’.

SysMLv1: UseCase scenario representations: On use of Activity Diagrams with swimlanes and/or Sequence Diagrams (Interactions): Actor or block-based custom «actor» on 1st (typically left) Lifeline/Swimlane, System/Subsystem on 2nd Lifeline/Swimlane

Webel: MBSE: SysMLv1: Prefer a custom «actor» extension of a Block (such as the non-normative External) over UML-style Actor for use as parts in IBDs and on allocation swimlanes. You can also have a Trace from a block-based «actor» to a UML-style Actor.

Webel: SysML/UML: Dr Darren explains HOWTO use concise 'i'/'o' (input/output) Pin and Parameter naming conventions to promote a signal processing mindset in Activity Diagrams. And HOWTO get them compact.

TIP: SysMLv1: MagicDraw/Cameo: Activity Diagrams: Consider using the Pin display mode 'Name And Type Labels Inside' for 'Position of Labels'. Dr Darren swears by it!

Webel: Psy/MPsy: Psychrometrics for Mathematica: '$HC' in a function name indicates pure sensible heating or cooling (with no change in water vapour content). Such functions may also be used in the pure sensible portion of a 2-step treatment.

Webel: SysML4Mathematica: POLICY: Handle flow sign changes via a single negative (not duplicated and "adjusted" algebra). This strategy may come at a very slight performance cost (for benefit of more robustness).

SysMLv1.x: Limitation: The 'body' (maths formula) of an OpaqueBehavior can't be synchronised (shared) with the 'constraint' of a ConstraintBlock (directly in the SysML model). Can lead to a WET (not DRY) model and breaks Single Source of Truth!

Webel: SysML4Mathematica: SysML Activities and SysML Activity Diagrams CAN represent some functional programming paradigms (sort of). You can type Parameters by encapsulations of functions and pass them to/from InputPins/OutputPins of Actions.

Webel: SysML4Mathematica: TIP: Representing Mathematica functions as SysML ConstraintBlocks modelled in SysML Parametric Diagrams and as Activities in SysML Activity Diagrams is super for analysing the dependencies between functions and their arguments!

SysML: Cameo Systems Modeler: A ValueType that does not extend Real might not always simulate correctly when used to type a constraint parameter of a ConstraintBlock (in a SysML Parametric Diagram) or to type a parameter (in a SysML Activity Diagram)!

ISSUE/GOTCHA: MagicDraw/Cameo v2022x: UML/SysML: If you "rename" an ActivityParameterNode symbol on the frame of an Activity Diagram it actually renames the underlying Parameter (only) NOT the name of the ActivityParameterNode element!

SysML/UML: MagicDraw/Cameo: The name of an ActivityParameterNode does not always stay in synch with its Parameter (and it is not always desirable that it does).

SysML/UML: MagicDraw/Cameo: Activity Diagrams: All Pins of CallBehaviorActions and CallOperationActions MUST be displayed (synchronised). All ActivityParameterNodes MUST be shown on the frame of an Activity Diagram.

Webel: SysML4Mathematica: SysML Parametric Diagrams are not well suited to modelling calculations with Blocks for MTools classes, or for modelling complex logic flow of Mathematica functions. Prefer SysML Activity Diagrams for those modelling cases.

SysML/UML: MagicDraw/Cameo: GOTCHA: Connecting a typed OutputPin to an untyped (UNSPECIFIED) InputPin with an ObjectFlow changes the type of the InputPin

Webel: SysML4Mathematica: Convention: A '$E' in a function name indicates that all parameters (arguments and return) are Mathematica '_' expressions. However, when representing such functions as Activities they may end up getting strongly typed in tools!

TIP: Webel: SysML/UML: On the boundary of Action symbols in Activity Diagrams use any placement or "ordering" of Parameter symbols that works for the diagram. Ignore the Parameter ordering of Operation and Behavior signatures completely!

SysML4Mathematica: Example 11 [B]: Total (qDotTot), sensible (qDotSen), and latent cooling (qDotLat) required for cooling air: Using Webel MPsy objects and SysML Activity Diagrams

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Example 11 [A] Total (qDotTot), sensible (qDotSen), and latent cooling (qDotLat) required for cooling air: Using CoolProp wrappers and SysML Parametric Diagrams

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

Webel: SysML4Mathematica: When modelling the main logic flow of Mathematica code with Activity Diagrams it isn't necessary to model every Mathematica construct. Placeholder Actions, OpaqueActions , and OpaqueBehaviors (as CallBehaviorActions) may be used.

SysML4Mathematica: Example 10: Condition and dehumidify air by chilling and condensing some moisture: Process table

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Example 09: Moisture added to air: Amount (mass)

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML/UML: MagicDraw/Cameo: To display the body of an OpaqueBehavior on a usage (CallBehaviorAction) in an Activity Diagram use an element property callout of 'Body' into a Note with a handle to the CallBehaviorAction

SysML4Mathematica: Example 08a: Humidification: Drying lumber with air: required volumetric air flow rate

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Example 07: Sensible cooling: 'qDotSen' (-ve): energy transfer rate FROM humid air

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Example 06: Sensible heating: 'qSen' per mass (+ve): energy transfer TO humid air

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Example 05: Sensible heating: 'qSen' (+ve): energy transfer TO humid air

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TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class

SysML4Mathematica: Psychrometrics (humid air physics) Air Conditioning scenarios in graphical Systems Modeling Language (SysMLv1.x) and Mathematica

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SysML Package Diagram

[FIXED in v2022Refresh1]: BUG: MagicDraw/Cameo: 19SP3/v2022xGolden: Activity Diagrams: Pin display mode 'Position of Labels' does not stick, label positions in Diagrams have sometimes moved after re-opening a project [and "FIX"]

MagicDraw/Cameo: UML/SysML: TIP: Activity Diagrams: Learn how to use the Refactor > Extract feature to divide-and-conquer and identify cleaner flow and logic. Get control of those crossed wires!

Webel: MagicDraw/Cameo: UML/SysML: TIP: Activity Diagrams, StateMachine Diagrams, and port-based IBDs: Keep it loose initially with oblique (no break) paths, then square it up with rectangular paths at the very end

UML/SysML: TIP: Using Cameo Simulation Toolkit will strengthen your use of Activity Diagrams even when they are "just" analysis diagrams

MagicDraw/Cameo 19SP3/v2022xGolden: [FIXED in v2022xRefresh1]: Activity Diagrams: Pin display mode 'Position of Labels' does not work correctly for 'Name And Type Labels Inside', only shows the Name inside (not the Label) [and WORKAROUND]

Stereotypes applying to parameters can appear on object nodes in activity diagrams, as shown in Figure 11-7, when the object node notation is used as a shorthand for pins.

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OMG Systems Modeling Language (SysML) 1.6

Screencast: SysML/MBSE: An air conditioner refrigerant cycle in Cameo Simulation Toolkit

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Video style

This video only shows the Activities and StateMachines. For the underlying Block model please visit this accompanying slide trail:

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

35: Activity ActualisePhysicalAsset and «STUB» ManifestActualAssetFromPotentialAsset

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34: Activity «STUB» PopulatePotentialWithProcessesAndTrackingData

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33: Activity «STUB» PopulateDigitalWithDesignModels

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32: Activity CreatePhysicalEntityFromDigitalEntity

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31: Case: Create a new physical asset using a «digital» @Entity initially as a digital "template"

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30: Activity UpdateDigitalFromPhysical

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25: Effect Activities used by the acquisition case

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29: Acquisition case: «STUB» Activities for initial model data and information mapping

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28: Activity «stub» PopulateDigitalEntity

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27: Activity CreateDigitalEntityFromPhysicalEntity

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