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Simple pendulum case crashes in v1.9
Simple pendulum case crashes in v1.9
Hi,
The simple pendulum case below worked in version 1.8 but crashes in 1.9. Is this is a new bug or am I missing something???
class pendulum
constant Real PI = 3.14159;
parameter Real m = 1,g = 9.81,L = 0.5;
Real F;
output Real x(start = 0.5),y(start = 0);
output Real vx,vy;
equation
m * der(vx) = -x / L * F;
m * der(vy) = -y / L * F - m * g;
der(x) = vx;
der(y) = vy;
x ^ 2 + y ^ 2 = L ^ 2;
end pendulum;
Thank you
Re: Simple pendulum case crashes in v1.9
- sjoelund.se
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- 1700 Posts
Re: Simple pendulum case crashes in v1.9
Our back-end developer replied:
The pendulum model requires dynamic state selection. It is not enabled by default. You can enable it by setting
setMatchingAlgorithm("PFPlusExt");
setIndexReductionMethod("dynamicStateSelection");
I opened up a new ticket (#1820) to have these options in OMEdit as well.
- sjoelund.se
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- 1700 Posts
Re: Simple pendulum case crashes in v1.9
OMEdit now handles this.
Adeel.
- adeas
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- 454 Posts
Re: Simple pendulum case crashes in v1.9
Hi,
Install the new nightly build https://build.openmodelica.org/omc/buil … y-builds/.
In the simulation dialog you see two new drop down boxes where you can select these options before simulation.
Adeel.
- adeas
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- 454 Posts
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