Opened 5 years ago
Last modified 5 years ago
#5857 new defect
MSL OpAmp simulation results in OM
| Reported by: | Owned by: | Lennart Ochel | |
|---|---|---|---|
| Priority: | blocker | Milestone: | 2.0.0 |
| Component: | Backend | Version: | v1.16.0-dev |
| Keywords: | Cc: |
Description
I am referring to the recent PRs in the MSL 4.0.0 (and 3.2.3 respectively):
In Modelica PR #3432 the parameter strict was changed from false to true. I investigated both cases with Dymola and OM (see attached SignalGenerator.png)
Dymola shows pretty much the same result for strict = true and strict = false. OM shows practically the negative signals for time < 0.2 and more and more strange results towards the end of the simulation.
Attachments (1)
Change History (4)
by , 5 years ago
| Attachment: | SignalGenerator.png added |
|---|
comment:2 by , 5 years ago
The OM strict simulation (strict = true) shows the following message:
Warning: maximal number of iteration reached but no root found Error solving nonlinear system 146 at time 0.041943 Warning: maximal number of iteration reached but no root found ... Warning: maximal number of iteration reached but no root found Error solving nonlinear system 146 at time 0.997369
The OM simulation with (strict = false) shows the following message:
The initialization finished successfully with 4 homotopy steps. Warning: maximal number of iteration reached but no root found Warning: maximal number of iteration reached but no root found Warning: maximal number of iteration reached but no root found Error solving nonlinear system 146 at time 0.712988 Warning: maximal number of iteration reached but no root found Warning: maximal number of iteration reached but no root found Warning: maximal number of iteration reached but no root found Error solving nonlinear system 146 at time 0.968817 Warning: maximal number of iteration reached but no root found
One note here: if there is any error in the simulation I wonder why both the simulations report The simulation finished successfully.
comment:3 by , 5 years ago
| Component: | *unknown* → Backend |
|---|---|
| Owner: | changed from to |
| Priority: | high → blocker |
Comparison of signals between Dymola and OM