Event handling - Revision history

Jpye: /* Implementation issues */

2012-05-16T16:30:05Z

Implementation issues

← Older revision		Revision as of 16:30, 16 May 2012
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	* initial condition problems: there is no control over the equations used to reinitialise after a boundary. We just the the IDACalcIC built-in method.		* initial condition problems: there is no control over the equations used to reinitialise after a boundary. We just the the IDACalcIC built-in method.
	* [[improved DAE syntax\|convenient derivative syntax]], eg "der(x) = -x".		* [[improved DAE syntax\|convenient derivative syntax]], eg "der(x) = -x".
			* any means to convey boolean states back from an [[external relation]], meaning that it is difficult to trigger events based on the state of external code.

	Instead, ASCEND allows only equations to be turned off and turned as the solver moves across the boundary. There is no way to trigger and special behaviour or action '''''at''''' the boundary. This means that currently, we can not implement a 'true' bouncing ball model, nor a thermostat model.		Instead, ASCEND allows only equations to be turned off and turned as the solver moves across the boundary. There is no way to trigger and special behaviour or action '''''at''''' the boundary. This means that currently, we can not implement a 'true' bouncing ball model, nor a thermostat model.

Jpye at 16:28, 16 May 2012

2012-05-16T16:28:13Z

← Older revision		Revision as of 16:28, 16 May 2012
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	* ''smooth(...)'' forces the solver to treat expressions as continuously differentiable. we assume this is related to boundary suppression.		* ''smooth(...)'' forces the solver to treat expressions as continuously differentiable. we assume this is related to boundary suppression.

	== gPROMS solution ==		=== gPROMS solution ===

	The thesis by Paul Barton<ref>P Barton, 1992. ''[http://yoric.mit.edu/sites/default/files/BartonThesis.pdf Modelling and simulation of combined discrete/continuous processes]'', PhD thesis, MIT.</ref> also has a solution for this problem.		The thesis by Paul Barton<ref>P Barton, 1992. ''[http://yoric.mit.edu/sites/default/files/BartonThesis.pdf Modelling and simulation of combined discrete/continuous processes]'', PhD thesis, MIT.</ref> also has a solution for this problem.

	== Other implementations? ==		=== Other implementations? ===

	Some other possible implementations/solutions worth researching:		Some other possible implementations/solutions worth researching:

BenAllan: /* Proposed solution */

2012-02-15T23:08:43Z

Proposed solution

← Older revision		Revision as of 23:08, 15 February 2012
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	We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.		We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.

			A decent explanation of the full design space is in Fishwick<ref>http://www.cee.mtu.edu/~amlan/ce5710/Readings/tax_sim.pdf</ref>

	== References ==		== References ==

Jpye: /* Other implementations? */

2012-02-15T20:40:22Z

Other implementations?

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	* MOSILAB webpage<ref>MOSILAB webpage, http://mosim.swt.tu-berlin.de/wiki/doku.php?id=projects:mosilab:home</ref> and paper<ref>J Bastian, C Clauß, O Enge-Rosenblatt and P Schneider, 2010. [http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1355711.pdf MOSILAB - a Modelica solver for multiphysics problems with structural variability], Proceedings of 1st Conference on Multiphysics Simulation - Advanced Methods for Industrial Engineering 2010.</ref>.		* MOSILAB webpage<ref>MOSILAB webpage, http://mosim.swt.tu-berlin.de/wiki/doku.php?id=projects:mosilab:home</ref> and paper<ref>J Bastian, C Clauß, O Enge-Rosenblatt and P Schneider, 2010. [http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1355711.pdf MOSILAB - a Modelica solver for multiphysics problems with structural variability], Proceedings of 1st Conference on Multiphysics Simulation - Advanced Methods for Industrial Engineering 2010.</ref>.
			* A [http://en.wikipedia.org/wiki/List_of_discrete_event_simulation_software#Open_Source list of discrete event simulation software]

	== Proposed solution ==		== Proposed solution ==

Jpye: /* Proposed solution */

2012-02-15T20:28:19Z

Proposed solution

← Older revision		Revision as of 20:28, 15 February 2012
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	We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.		We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.
	~~We need some external references here~~

	== References ==		== References ==

Jpye: /* References */

2012-02-15T20:27:34Z

References

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	== References ==		== References ==
	<references/>		<references/>

			There are further references in [[integration of conditional models]]

Jpye: /* Other implementations? */

2012-02-15T20:26:22Z

Other implementations?

← Older revision		Revision as of 20:26, 15 February 2012
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	Some other possible implementations/solutions worth researching:		Some other possible implementations/solutions worth researching:

	* MOSILAB webpage<ref>~~MOSLAB~~ webpage, http://mosim.swt.tu-berlin.de/wiki/doku.php?id=projects:mosilab:home</ref> and paper<ref>		* MOSILAB webpage<ref>MOSILAB webpage, http://mosim.swt.tu-berlin.de/wiki/doku.php?id=projects:mosilab:home</ref> and paper<ref>J Bastian, C Clauß, O Enge-Rosenblatt and P Schneider, 2010. [http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1355711.pdf MOSILAB - a Modelica solver for multiphysics problems with structural variability], Proceedings of 1st Conference on Multiphysics Simulation - Advanced Methods for Industrial Engineering 2010.</ref>.
	J Bastian, C Clauß, O Enge-Rosenblatt and P Schneider, 2010. [http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1355711.pdf MOSILAB - a Modelica solver for multiphysics problems with structural variability], Proceedings of 1st Conference on Multiphysics Simulation - Advanced Methods for Industrial Engineering 2010.</ref>

	== Proposed solution ==		== Proposed solution ==

Jpye: /* gPROMS solution */

2012-02-15T20:25:10Z

gPROMS solution

← Older revision		Revision as of 20:25, 15 February 2012
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	The thesis by Paul Barton<ref>P Barton, 1992. ''[http://yoric.mit.edu/sites/default/files/BartonThesis.pdf Modelling and simulation of combined discrete/continuous processes]'', PhD thesis, MIT.</ref> also has a solution for this problem.		The thesis by Paul Barton<ref>P Barton, 1992. ''[http://yoric.mit.edu/sites/default/files/BartonThesis.pdf Modelling and simulation of combined discrete/continuous processes]'', PhD thesis, MIT.</ref> also has a solution for this problem.

			== Other implementations? ==

			Some other possible implementations/solutions worth researching:

			* MOSILAB webpage<ref>MOSLAB webpage, http://mosim.swt.tu-berlin.de/wiki/doku.php?id=projects:mosilab:home</ref> and paper<ref>
			J Bastian, C Clauß, O Enge-Rosenblatt and P Schneider, 2010. [http://publica.fraunhofer.de/eprints/urn:nbn:de:0011-n-1355711.pdf MOSILAB - a Modelica solver for multiphysics problems with structural variability], Proceedings of 1st Conference on Multiphysics Simulation - Advanced Methods for Industrial Engineering 2010.</ref>

	== Proposed solution ==		== Proposed solution ==

Jpye at 20:08, 15 February 2012

2012-02-15T20:08:03Z

← Older revision		Revision as of 20:08, 15 February 2012
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	=== Modelica implementation ===		=== Modelica implementation ===

	The [http://www.modelica.org Modelica language] has some solutions to these problems that are worth consideration:		The [http://www.modelica.org Modelica language] has some solutions in their syntax documentation<ref>Modelica 3.2 Language Specification, 2010, http://modelica.org/documents/ModelicaSpec32.pdf</ref> to these problems that are worth consideration:

	* ''when-equations'' are executed at a boundary		* ''when-equations'' are executed at a boundary
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	* ''smooth(...)'' forces the solver to treat expressions as continuously differentiable. we assume this is related to boundary suppression.		* ''smooth(...)'' forces the solver to treat expressions as continuously differentiable. we assume this is related to boundary suppression.

			== gPROMS solution ==

			The thesis by Paul Barton<ref>P Barton, 1992. ''[http://yoric.mit.edu/sites/default/files/BartonThesis.pdf Modelling and simulation of combined discrete/continuous processes]'', PhD thesis, MIT.</ref> also has a solution for this problem.

	== Proposed solution ==		== Proposed solution ==

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	We need some external references here		We need some external references here

	~~(link to modelica standard)~~		== References ==
			<references/>
	~~(link to Barton thesis (gproms) which had event syntax)~~

BenAllan: /* Proposed solution */

2012-02-15T19:49:18Z

Proposed solution

← Older revision		Revision as of 19:49, 15 February 2012
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	We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.		We don't know how we'll do it. Please give your thoughts on the '''discussion''' page.
			We need some external references here

			(link to modelica standard)

			(link to Barton thesis (gproms) which had event syntax)