SysPhS
MagicDraw/Cameo v19SP3: vs SysPhS-1.1: OpaqueExpression for Slot value exports to Modelica as 'null' if only uses a single variable. WORKAROUND/HACK prefix the variable with '1 *' [FIXED in v2021x]
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SysPhS vs Modelica: If you redeclare a PhSConstant (Modelica parameter) as a PhSVariable (Modelica variable) Modelica still treats it as a 'parameter'. You can end up with an unbalanced system with one equation too many!
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SysPhS-1.1: Does not support Modelica's encapsulated enumeration.
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SysPhS-1.1: Does not support Modelica's conditional declaration form.
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MagicDraw/Cameo v19SP3: vs SysPhS-1.1: Modelica export: Direct binding from a PhSVariable value property within a FlowProperty of a Port to an inner value property does not flatten. WORKAROUND: Use an intermediate constraint property.
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MagicDraw/Cameo v19SP3+SysPhS-1.1: On export to Modelica sometimes repeats parts of an equation into an extending model.
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MagicDraw/Cameo v19SP3+SysPhS-1.1: Does not cleanly export INLINE Modelica 'if/then/else' statements (a.k.a. "switching" form)
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MagicDraw/Cameo v19SP3+SysPhS-1.1: Does not cleanly export Modelica 'when/then' statements
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Webel vs SysPhS-1.1: Modelica: Suggest need option to NOT always set a 'start' value also as 'fixed' (especially where 'initial equation' is not supported)
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SysPhS: MagicDraw/Cameo v19SP3: Export to Modelica does not interpret as 'start' the default on a PhSVariable assigned via ElementValue to a PhSConstant
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SysPhSLibrary and ISO-80000 ModelLibrary: Some ValueType names and Unit symbols are not Modelica-friendly
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SysPhS-1.1: Does not support Modelica's 'min' or 'max' on type declarations
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MagicDraw/Cameo v19SP3: SysPhS: If you have a custom ValueType it MUST extend Real either directly or indirectly or it will not be seen on export to Modelica.
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SysPhS-1.1: Does not support Modelica's 'experiment' annotations
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SysPhS-1.1: Does not support Modelica's 'initial equation'. WORKAROUND: One can often achieve the same by directly setting a default on a variable and/or by using additional variables/parameters with 'start' and additional equations.
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07. Components [MOST]
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06. Connectors
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02. Discrete Behavior
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01. Basic Equations
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GOTCHA: MagicDraw SysML/Cameo 19SP3: Export to Modelica: The name of a redefining Property must be exactly the same as the Property it redefines or it will not export properly!
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Webel vs SysPhS-1.1: Annex A.5: Humidifier: The water temperature from TemperatureIncreaseConstraint and HeatingCalculationConstraint starts at 0 °C (should probably be the environment temperature 20 °C). Needs an additional parameter and initial value.
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Webel vs SysPhS-1.1: Annex A.5: Humidifier: Dimensional analysis of VaporPressureCalculationConstraint implies each 1 mL of water is equated with EXACTLY 1 g of produced vapor.
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Webel vs SysPhS-1.1: Annex A.5: Humidifier: Dimensional analysis of VaporPressureCalculationConstraint implies the output is a pressure rate, which makes no sense as consumed by RelativeHumidityCalculation and is inconsistent with the rest of the system.
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SysPhS-1.1: Annex A.5: The BDD Figure 74 and Parametric Diagram Figure 84 for block RelativeHumidityCalculationConstraint are missing PhSConstant 'c2'. Compare with the constraint {der(x)=((press/satVap)-change)/c2} in BDD Figure 79.
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SysPhS-1.1: Annex A.5: p.89: Figure 75: Humidifier blocks, ports, & component properties. Typo in name of value property 'litpSec2mLiptHr:Real' on WaterTank should be 'litpSec2mLitpHr:Real' (breaks export of redefining Property with correct name).
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MagicDraw/Cameo v19SP3 vs SysML&SysPhS: The sample project for the Humidifier example uses DEPRECATED FlowPorts (and sets values directly on them in the StateMachines).
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SysPhS-1.1: Annex A.5: Typo in Figure 98 redefining value property 'C2 : Time = 1.0{redefines C2,unit = second}', should be lower case 'c2' (compare with BDD Figure 79)
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SysPhS-1.1: Annex A.5: 'Figure 101: Heating Scenario Initial Values': HeatingCalculation1: no such value to redefine 'C1 : Time = 1.0{redefines C1,unit = second}', should be 'xIntg : Real' (compare with BDD Figure 77 and Parametric diagram Figure 88)
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SysPhS-1.1: Annex A.5: redefinition 'humidifierSystem {redefines humidifierSystem}' incorrect in Figure 96: Humidifier System Scenario Initial Values
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SysPhS-1.1: RelativeHumidityScenario1: Figure 98: Relative Humidiity Scenario Initial Values: RelativeHumidity should be RelativeHumidity1
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SysPhS-1.1: Annex A.5: Humidifier: Constraints on HeatingCalculationConstraint not consistent between BDD Figure 79 and Par Figure 88 (does not have 'c1')
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SysPhS-1.1: Annex A.5: Humidifier: Constraints on RelativeHumidityCalculationConstraint not consistent between BDD Figure 79 and Par Figure 84 (does not have 'c2')
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SysPhS-1.1: Annex A.5: Humidifier: Use of UML-style direct Port conjugation not permitted since SysML-1.6, prefer ~InterfaceBlock type-based conjugation (example requires migration)
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SysPhS-1.1: Annex A.5: Humidifier: Naming not very consistent across parts, input/output Port name, value properties, or constraint parameters
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There is no «port» stereotype keyword for Port or Property in UML-2.5.1 or SysML-1.6. It is assumed to be introduced in some SysML and SysPhS specification diagrams as a custom or user-defined stereotype for special illustration purposes.
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SysPhS-1.1: Apparent use of part Property with «port» keyword (instead of standard SysML Port) leads to property path symbols appearing inside the boundary of context blocks (instead of within a Port symbol on the boundary) in IBDs and Parametric Diagrams
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SysPhS-1.1: p.81: 'resistance:ViscousResistance' (in Figure 60) has to be treated as a PhSVariable not a PhSConstant, otherwise get an invalid system with 6 variables and 7 equations.
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SysPhS-1.1: The correct ValueTypes should be used throughout instead of just Real for constraint parameters in 'Figure 61: Hydraulics model constraint blocks'
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SysPhS-1.1 spec version of 'Figure 48: Internal structure of the signal processor' shows an ItemFlow for Real on an overlapping Connector line section, which is impossible to interpret.
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SysPhS-1.1: The correct ValueTypes for Current, Voltage, Resistance, Capacitance, and Inductance should be used throughout instead of just Real in 'Figure 40: Circuit constraint blocks'
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SysPhS-1.1 spec version of 'Figure 38: Internal structure of the circuit example' shows some bi-directional ItemFlows for Charge on overlapping Connector line sections, which are impossible to interpret.
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Annex A.5: Humidifier (with Units)
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Annex A.4: Hydraulics
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Annex A.3: Signal Processor
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Annex A.2: Electric Circuit
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GOTCHA: A SysML/SysPhS Connector (or Modelica connection) in an electronics model is NOT a wire! It's a contract between connected Ports.
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Webel vs SysPhS-1.1: Diagramming style: DO NOT recommend overlapping Connectors as shown in 'Figure 38: Internal structure of the circuit example'
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SysPhS-1.1: Suggest use connector forms 'Modelica.Blocks.Interfaces.RealInput u;' and 'Modelica.Blocks.Interfaces.RealOutput y;' not 'input Real u;' and 'output Real y;' in Modelica code examples (otherwise not connectable).
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SysPhS-1.1: p.38: 10.9.4 Modelica modeling, signal flow: Suggest kick start Spring with something like 'position=5' (otherwise get flat line when run).
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SysPhS-1.1: p.38: 10.9.4 Modelica modeling, signal flow: Modelica code: the equation 'der(velocity)=(u-springcst*position)/m;' should use variable 'mass' not 'm'
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: RealVectorSignalIn2Element extends RealVectorSignalElement not RealVectorSignalInElement, RealVectorSignalOut2Element extends RealVectorSignalElement not RealVectorSignalOutElement (and so on)
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MDSysML/Cameo 19SP3: The SysPhS versions of Conductance, Frequency, siemens, and hertz, are not explicitly provided in the MagicDraw/Cameo model library
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: Does not represent the elements in 'Figure 32: Elements for signal flows of electrical quantities'
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SysPhS-1.1: p.60: table for routing components: row for Switch: equivalents Modelica.Blocks.Logical.Switch (for Modelica) and Switch (for Simulink) missing
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SysPhS-1.1: Use of 'Criteria = u2~=0' for Simulink for Real.Routing.Switch::u2 inconsistent with BooleanInput of control port Modelica.Blocks.Logical.Switch::u2
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SysPhS-1.1 (and MDSysML/Cameo 19SP3 SysPhSLibrary): Use of RealSignalInElement for Real.Routing.Switch::u2 inconsistent with BooleanInput of control port Modelica.Blocks.Logical.Switch::u2
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: SourceAndSink.Constant: Wrong Real (UML version not SysML version) has been used for 'k', so sorts in the 'properties' compartment instead of the 'values' compartment
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SysPhS-1.1: p.57: Table 11.3.2.5 Mathematical components: Modelica Parameters for the Subtraction row should indicate (k1 and) k2 required to achieve subtraction via Math.Add (or the correct exported values should be explained).
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: Mathematical.Subtraction: Wrong Real (UML version not SysML version) has been used for 'k2', so sorts in the 'properties' compartment instead of the 'values' compartment
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: Mathematical.Gain: Wrong Real (UML version not SysML version) has been used for 'gain', so sorts in the 'properties' compartment instead of the 'values' compartment
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: SPELLING/TYPO: VariableDelay: parameter 'maxDelay' should be 'delayMax'
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: Continuous.Integrator is missing the 'init' PhSConstant (maps to y_start in Modelica)
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MDSysML/Cameo 19SP3: SysPhSLibrary vs SysPhS-1.1: NonLinear.Saturation: Wrong Real (UML version not SysML version) has been used for 'lower' and 'upper', so sorts in the 'properties' compartment instead of the 'values' compartment
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MDSysML/Cameo 19SP3 vs SysPhS-1.1: The Continuous.TransferFunction and Discrete.TransferFunction have Ports 'u : RealVectorSignalInElement [1]' or '[*]' and 'y : RealVectorSignalInElement [1]' or '[*] instead of RealSignalInElement/RealSignalOutElement
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SysPhS-1.1: p.30: text and Figure 22: Incorrect references to 'RealInSignalElement' and 'RealOutSignalElement' (should be RealSignalInElement, RealSignalOutElement)
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SysPhS-1.1: p.53: Figure 30: Incorrect references to RealInSignalElement, RealOutSignalElement, IntegerInSignalElement, IntegerOutSignalElement, BooleanInSignalElement, BooleanOutSignalElement (should be RealSignalInElement, RealSignalOutElement, ...)
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SysPhS-1.1: p.47: 10.12.2 SysML modeling: The states StandBy and On in 'Figure 29: State machine in SysML' should probably use 'entry' not 'doActivity'.
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SysPhS-1.1: p.47: 10.12.2 SysML modeling: References to 'u.sigsp' and 'y.usigsp' should be 'u.rSig' and 'y.rSig'.
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SysPhS-1.1: p.47: 10.12.2 SysML modeling: TYPO: Incorrect spelling of RealInSignalElement (should be RealSignalInElement) and RealOutSignalElement (should be RealSignalOutElement)
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SysPhS-1.1: 10.12.2 SysML modeling: p.47, p.48: References to .sig and .rsig in 'Figure 29: State machine in SysML' and Modelica code example should be .rSig
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SysPhS-1.1: 10.12.2 SysML modeling: p.47: Name of StateMachine in 'Figure 29: State machine in SysML' should be ComputerSM (not Computer) for consistency with the Modelica code example
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SysPhS-1.1: p.45: 10.11.2 SysML modeling: Reference to 'the units library in Figure 20, Subclause 11.2.2' is wrong
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SysPhS-1.1: p.44: 10.10.3 Modelica modeling: Reference to 'The following Modelica code corresponds to Figure 15' should probably be 'to Figure 27'.
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SysPhS-1.1: p.42: 10.9.8 Modelica modeling, physical interaction: Modelica code has 'forcediff=springcst*lengthchg;' should be 'forcethru=springcst*lengthchg;'
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GOTCHA: MagicDraw SysML/Cameo 19SP3: Export to Modelica: 'entry', 'doActivity', or 'exit' Behaviors of a State must be directly owned (not just "wrapped") or they won't be seen on export!
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SysPhS-1.1: p.41: 10.9.8 Modelica modeling, physical interaction: Reference to 'the bindings in Figure 14' should probably be 'the bindings in Figure 26'.
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SysPhS-1.1: Typos: Numerous references to 'rsig' lower case should be 'rSig' (including Figure 25 and Figure 29)
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SysPhS-1.1: p.38: 10.9.4 Modelica modeling, signal flow: Modelica code: the keyword should be 'equation' not 'equations'.
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SysPhS-1.1: p.38: 10.9.4 Modelica modeling, signal flow: Example Modelica model should be for SpringMassSys not Spring
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SysPhS-1.1: [TRIVIAL] p.11: If property 'm:Mass' is named then ':Ground' should also be named for consistency in 'Figure 2: Association block with internal structure and connector properties in SysML'
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SysPhS-1.1: p.28: 10.6.3 Modelica modeling: An assigned value “...” is shown for v3 in the Modelica code but none is shown in the SysML model in 'Figure 21: PhSVariables and PhSConstant in SysML' (and “...” is not compatible with Real).
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MagicDraw SysML/Cameo: 19SP3: Does not seem to support export to Modelica from a Package [use a SysML Block as root instead]
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Figure 2: Association block with internal structure and connector properties in SysML (and Figure 3)
SysPhS-1.1 specification body figures in MagicDraw SysML (or Cameo Systems Modeler) vs Modelica
Sections
SysPhS-1.1: p.32: 10.7.8 Modelica modeling, physical interaction: Type Real for 'f' and 'lV' in example Modelica code for Spring do not correspond to 'Figure 23: Ports for physical interaction in SysML', should be Force and Velocity.
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SysPhS-1.1: p.30: 10.7.4 Modelica modeling, signal flow: Example Modelica code for Spring corresponding to 'Figure 22: Ports for signal flow in SysML' is invalid [should probably be 'input Real u;' and 'output Real y;' not 'in ...' and 'out ...']
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MagicDraw SysML/Cameo: 19SP3: Export to Modelica from TestBed (for SignalProcessor) sample does not validate in Wolfram SystemModeler
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MagicDraw SysML/Cameo: 19SP3: Export to Modelica from SysPhS sample for HumidifierSystem does not execute in Wolfram SystemModeler Simulation Centre
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SysPhS-1.1: This specification: Provides a human-usable textual syntax for mathematical expressions.
SysPhS zone (SysML Extension for Physical Interaction and Signal Flow Simulation)
NEWS: SysML Extension for Physical Interaction and Signal Flow Simulation (SysPhS): New technology assessment trail: SysPhS-1.1 specification body figures in MagicDraw SysML (or Cameo Systems Modeler) vs Modelica
NEWS: SysML Extension for Physical Interaction and Signal Flow Simulation (SysPhS): New technology assessment