BDD & IBD: RelativeHumidity

Gallery
Tutorial
TRAIL: SysPhS-1.1 Annex A examples in MagicDraw SysML (or Cameo Systems Modeler) vs Modelica (Wolfram SystemsModeler)
Section
Annex A.5: Humidifier (with Units)
Topic level
INTERMEDIATE
UML keywords
Property::redefinedProperty
ports compartment
Port
SysML keywords
Block
:values compartment
:parts compartment
parts compartment
SysPhS Keywords
RealSignalInElement
Keywords
Slide kind
hybrid diagram
SysML Block Definition Diagram (BDD)
SysML Internal Block Diagram (IBD)
SysPhS-1.1: 'The internal structure of HumidifiedRoom depicted in Figure 66 uses a block RelativeHumidity, which has an internal structure depicted in Figure 67.'
The composite diagram here shows the block RelativeHumidity block and its embedded Internal Block Diagram (IBD):
Click on the image to view it full size

It has been indicated that there is some issue with the vPC:VaporPressureCalculation (we'll see a bit later that there's a concern with the unit dimensions).

We're going to look at RelativeHumidityCalculation first to get a fix on the units of the quantity entering the iChange port.

Up next
BDD & PD: RelativeHumidityCalculation
Notes
[ASSERTION]{STRONG} Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is assumed that "vapor" is a volume rate corresponding to the rate of consumption OF HEATED LIQUID WATER (from a tank) used to create the vapor.
[MODELLING, NAVIGATION, PATTERN, TIP, TOOL]{STRONG} Webel: UML/SysML: Navigation: ALWAYS offer a way out of a diagram (usually up a hierarchy, but possibly across) using a navigable symbol (linked to a diagram) and/or a diagram symbol. Avoid "cul-de-sacs"! [But beware of shared package cross-dependencies]
[MODELLING, PATTERN, TIP]{RECOMMENDED} SysML: When using Property::defaultValue and Property::redefinedValue to carry a "shadow hierarchy" of redefinitions across an entire system hierarchy, considering using a user-defined keyword such as «configuration» or «scenario» on each redefining Block
[CAPABILITY, FEATURE, TOOL] MagicDraw/Cameo: Supports embedding of one or more Diagrams in another via the Diagram Overview feature. Awesome!
[CONVENTION, DISPLAY, MODELLING, STYLE, TIP]{STRONG} Webel: SysMLv1: Highly recommend creating a "focus" Block Definition Diagram (BDD) for each main Block with expanded feature details and relationships to at least nearest neighbours
[NAMING, TIP]{RECOMMENDED} Suffix the "focus" BDD for a Block with .bdd so that it won't clash with a corresponding IBD on diagram export.
[DISPLAY, STYLE, TIP, TOOL]{SUGGESTED} Style: use line width 2 or 3 on the border of the "focus" element in "focus" diagrams (such as the main Block or Class of a dedicated Block Definition Diagram or Class Diagram)
[CONVENTION, MODELLING, NAMING, TIP]{STRONG} Webel: If you must name your Ports or Pins, name them simply 'i', 'o', or 'io' to indicate direction UNLESS you have to indicate a special role like 'iRole', 'oAuxiliary'. DO NOT use Port or Pin names like 'input', 'output', etc.
Snippets (quotes/extracts)
  [SysPhS-1.1] The internal structure of HumidifiedRoom depicted in Figure 66 uses a block RelativeHumidity, which has an internal structure depicted in Figure 67.
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Visit also (backlinks)
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Figure 27: Default values and initial value in SysML
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