Bug in Modelica.Mechanics.Rotational.Gearbox

[modelica-trac-importer]

Reported by stefanv on 11 Jun 2010 13:54 UTC
Modelica.Mechanics.Rotational.Gearbox includes a LossyGear, which has useSupport=true. The Gear's support is connected to the Gearbox's support. However, the Gearbox inherits its support from Interfaces.PartialTwoFlangesAndSupport, which by default has useSupport=false. The extends clause does not modify this, but it should.

In short, the extends clause of Modelica.Mechanics.Rotational.Gearbox should read:

extends Modelica.Mechanics.Rotational.Interfaces.PartialTwoFlangesAndSupport(useSupport=true);

Can someone with the appropriate privileges please correct this (in MSL 3.1 and 3.2)?

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Migrated-From: https://trac.modelica.org/Modelica/ticket/381

[modelica-trac-importer]

Comment by stefanv on 11 Jun 2010 18:36 UTC
After some discussion with my colleagues, I believe I might have been wrong. We still think there is a bug, but that the correct fix is to change the declaration of LossyGear within the model:

  Rotational.Components.LossyGear lossyGear(**final** ratio=ratio, **final** lossTable=lossTable, **final** useSupport=useSupport) annotation ...

PS. The model should have been Modelica.Mechanics.Rotational.Components.Gearbox (I left out "Components" earlier).

[modelica-trac-importer]

Modified by dietmarw on 11 Jun 2010 19:41 UTC

[modelica-trac-importer]

Comment by AHaumer on 8 Jul 2010 08:35 UTC
Sorry Stefan you're wrong:
GearBox contains LossyGear. LossyGear.useSupport is set final to true, since LossyGear's conditional support (which isn't accessible from outside of the GearBox) is connected to the internal support of the GearBox. The user can choose to use the conditional external support of the GearBox or not. The support torque will show up either at the conditional interal "fixed" of the GearBox (GearBox.useSupport=false) or at the external support (GearBox.useSUpport=true).
I hope this clarifies the usage of conditional support (and conditional HeatPort).

Unfortunately I can't close the ticket (won't fix) - why? (See ticket #382).

[modelica-trac-importer]

Comment by dietmarw on 8 Jul 2010 15:14 UTC
So actually this means that the ticket is invalid rather than "Won't fix".