Opened 9 years ago
Last modified 9 years ago
#3191 new defect
Modelica.Fluid.Examples.HeatingSystem fails in combination with replaceHomotopy=actual
Reported by: | lochel | Owned by: | somebody |
---|---|---|---|
Priority: | high | Milestone: | Future |
Component: | Backend | Version: | trunk |
Keywords: | Cc: | casella |
Description
Modelica.Fluid.Examples.HeatingSystem fails if replaceHomotopy=actual is used due to a singular linear system during casualization:
1 : pump.dp_pump = pump.p_b_nominal - tank.ports[2].p 2 : pump.dp_pump = pump.medium.p - tank.ports[2].p [ 1.0 , 1.0 ; 1.0 , 1.0 ] * [ tank.ports[2].p ; pump.dp_pump ] = [ pump.p_b_nominal ; pump.medium.p ] U(2,2) = 0.0, which means system is singular for variable pump.dp_pump.
Change History (2)
comment:1 Changed 9 years ago by lochel
comment:2 Changed 9 years ago by lochel
- Cc casella added
The actual question here is, whether the system from the description is intended or not.
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I think singular linear systems should not break compilation, since they can be handled during runtime in some cases.
The following model contains the same singular linear system but can be simulated:
Therefore, I would prefer to change the error to a warning and proceed compilation.