PROPT - Revision history

Bjorn: /* Modeling */

2014-08-07T07:27:35Z

Modeling

← Older revision		Revision as of 03:27, 7 August 2014
Line 326:		Line 326:
	</math>		</math>

	When the problems are non-smooth in the independent variable (time, t), the problem should normally be ~~sepa- rated~~ into phases.		When the problems are non-smooth in the independent variable (time, t), the problem should normally be separated into phases.

	'''Use descriptive names for equations, states, controls, and variables:'''		'''Use descriptive names for equations, states, controls, and variables:'''
Line 338:		Line 338:
	'''Re-solve on successively finer grids:'''		'''Re-solve on successively finer grids:'''

	If a very fine grid is needed in order to obtain a good solution, it is usually a good idea to solve the problem on a less dense grid first, and then re solve, by using the obtained solution as a starting point. The following code will do the trick:		If a very fine grid is needed in order to obtain a good solution, it is usually a good idea to solve the problem on a less dense grid first, and then re-solve, by using the obtained solution as a starting point. The following code will do the trick:

	<pre>		<pre>

2012-02-29T14:31:47Z

Plotting

← Older revision		Revision as of 10:31, 29 February 2012
Line 649:		Line 649:
	===Plotting===		===Plotting===

	~~The best~~ way to plot ~~the data is to directly use the data fields as needed. There are also some automated plotting routines included~~, see ~~for example~~ ''help tomSym/ezplot''.		See [[Plotting and Evaluating PROPT Results]]

			For a quick way to do a simple plot, see ''help tomSym/ezplot''.

	==Optimal Control Examples==		==Optimal Control Examples==

2012-02-14T10:03:36Z

PROPT Guide Overview

← Older revision		Revision as of 06:03, 14 February 2012
Line 1:		Line 1:
	==~~PROPT Guide~~ Overview==		==Overview==

	The following sections describe the functionality of PROPT. It is recommended to get familiar with a few examples (included with software) to get accustomed with the notations used.		The following sections describe the functionality of PROPT. It is recommended to get familiar with a few examples (included with software) to get accustomed with the notations used.

2012-02-14T10:03:20Z

PROPT Guide Overview

← Older revision		Revision as of 06:03, 14 February 2012
Line 2:		Line 2:

	The following sections describe the functionality of PROPT. It is recommended to get familiar with a few examples (included with software) to get accustomed with the notations used.		The following sections describe the functionality of PROPT. It is recommended to get familiar with a few examples (included with software) to get accustomed with the notations used.

	~~Please visit PROPT on the web for detailed problem categories, presentations and more: [http://tomdyn.com/ http://tomdyn.com/].~~

	===Installation===		===Installation===

2012-02-14T10:00:28Z

Modeling

← Older revision		Revision as of 06:00, 14 February 2012
Line 314:		Line 314:
	'''Don't use inf in equations:'''		'''Don't use inf in equations:'''

	It is strongly discouraged to use -inf/inf in equations. This is because the equation may be evaluated by ~~subtract- ing~~ its left-hand side from the right-hand side and comparing the result to zero, which could have unexpected consequences.		It is strongly discouraged to use -inf/inf in equations. This is because the equation may be evaluated by subtracting its left-hand side from the right-hand side and comparing the result to zero, which could have unexpected consequences.

	Equations like ''x <''= ~~''I nf~~ ''are better left out completely (Although in many cases tomSym will know to ignore them anyway).		Equations like ''x <= Inf '' are better left out completely (Although in many cases tomSym will know to ignore them anyway).

	'''Avoid using non-smooth functions:'''		'''Avoid using non-smooth functions:'''

2012-02-14T09:54:53Z

Modeling

← Older revision		Revision as of 05:54, 14 February 2012
Line 274:		Line 274:
	<pre>		<pre>
	toms a b c		toms a b c
	cnbd = {a == b~~; b =~~= c};		cnbd = {a <= b <= c};
	</pre>		</pre>

Line 281:		Line 281:
	<pre>		<pre>
	toms a b c		toms a b c
	cnbd = {a == b		cnbd = {a <= b
	b == c};		b <= c};
	</pre>		</pre>

	The same is true for ~~inequalities~~.		(The same is true for equalities.)

			Be careful! This syntax is allowed in tomSym and PROPT because it is very common in mathematical notation, and allows for more compact code. Since it is not correct MATLAB notation, it will give unexpected results if the middle object is not a symbol. For example:

			<pre>
			a = 1;
			b = 2;
			toms c
			cbnd = {a <= b <= c} % This gives an error!
			</pre>

	When working with optimal control problems, one typically work with expressions that are valid for all collocation points. The functions ''collocate ''and ''icollocate ''can be used to extend an arbitrary expressions to the necessary collocation points.		When working with optimal control problems, one typically work with expressions that are valid for all collocation points. The functions ''collocate ''and ''icollocate ''can be used to extend an arbitrary expressions to the necessary collocation points.

2012-02-14T09:45:56Z

Standard functions and operators: moved to separate page

2012-02-14T09:41:04Z

Foreword to the software

← Older revision		Revision as of 05:41, 14 February 2012
Line 21:		Line 21:
	The software is provided without limitations to all registered customers in order to demonstrated what PROPT is capable of. The implementation of the extensive example library (more then 100 test cases are included) has eliminated most bugs, but there may still be a few that has escaped attention.		The software is provided without limitations to all registered customers in order to demonstrated what PROPT is capable of. The implementation of the extensive example library (more then 100 test cases are included) has eliminated most bugs, but there may still be a few that has escaped attention.

	If problems are encountered please email a copy of the problem for debugging.1 A status report can be expected within 24 hours.		If problems are encountered please email a copy of the problem for debugging. (All examples and data are treated as strictly confidential unless other instructions are given.) A status report can be expected within 24 hours.

	===Initial remarks===		===Initial remarks===

2012-02-14T09:39:34Z

Initial remarks

← Older revision		Revision as of 05:39, 14 February 2012
Line 40:		Line 40:

	*Dynamic systems		*Dynamic systems

	~~1 All examples and data are treated as strictly confidential unless other instructions are given.~~

	*General optimal control		*General optimal control

2012-02-13T18:33:34Z

Optimal Control Examples

← Older revision		Revision as of 14:33, 13 February 2012
Line 834:		Line 834:

	*[[PROPT Optimal Control Examples\|Optimal Control Examples]]		*[[PROPT Optimal Control Examples\|Optimal Control Examples]]

			[[Category:PROPT]]