Comments on: How to draw ODEs in Simulink http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/ This blog is about Simulink. Tue, 14 Feb 2012 17:41:30 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Joshua http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1693 Joshua Mon, 23 Jan 2012 17:20:34 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1693 This might be a stupid question but why do "states equal integrator blocks"? If someone could explain this to me it would be much appreciated! This might be a stupid question but why do “states equal integrator blocks”? If someone could explain this to me it would be much appreciated!

]]> By: Angelo http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1615 Angelo Sun, 20 Nov 2011 15:23:05 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1615 Nevermind, sorry, I just saw that the gain term has a minus sign, it's just a bit hidden on the simulink image. Nevermind, sorry, I just saw that the gain term has a minus sign, it’s just a bit hidden on the simulink image.

]]> By: Angelo http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1614 Angelo Sun, 20 Nov 2011 14:38:22 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1614 Hello. Aren't the signs on the addition block incorrect ? Shouldn't them be minus signs ? Hello. Aren’t the signs on the addition block incorrect ? Shouldn’t them be minus signs ?

]]> By: Guy Rouleau http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1358 Guy Rouleau Wed, 02 Mar 2011 13:28:07 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1358 Hi James, The variables in blue are an annotation with a callback function. This section of the documentation explains how it can be implemented: http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/f4-14820.html#bqgu635 For the blue spectacles, they mean that a viewer is attached to the signal. I recommend starting with this link to learn more on that topic: http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/brg_yqr-1.html Hi James,

The variables in blue are an annotation with a callback function. This section of the documentation explains how it can be implemented:

http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/f4-14820.html#bqgu635

For the blue spectacles, they mean that a viewer is attached to the signal. I recommend starting with this link to learn more on that topic:

http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/brg_yqr-1.html

]]> By: James http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1357 James Wed, 02 Mar 2011 12:39:34 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1357 ( http://blogs.mathworks.com/images/seth/2008Q2/smd_final.png ) When you had the variables declared in blue, was that done in the workspace, in the model properties callbacks or some nifty model function? Also, what are the blue spectacles in that same image? ( http://blogs.mathworks.com/images/seth/2008Q2/smd_final.png )
When you had the variables declared in blue, was that done in the workspace, in the model properties callbacks or some nifty model function? Also, what are the blue spectacles in that same image?

]]> By: Khaled http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1143 Khaled Wed, 14 Jul 2010 10:29:45 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1143 thank you for help thank you for help

]]> By: Seth http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1003 Seth Mon, 15 Mar 2010 18:15:36 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1003 @vincent - I have to admit that I learned this during a <a href="http://www.mathworks.com/services/training/" rel="nofollow">Simulink training</a>! There are a large number of examples in the products, and you can browse most of them through the <a href="http://www.mathworks.com/products/simulink/demos.html" rel="nofollow">Simulink demos web page</a>. <strong>What kind of examples are you looking for?</strong> @vincent – I have to admit that I learned this during a Simulink training! There are a large number of examples in the products, and you can browse most of them through the Simulink demos web page. What kind of examples are you looking for?

]]> By: vincent http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1001 vincent Mon, 15 Mar 2010 14:18:54 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-1001 where can we get more examples like this?? where can we get more examples like this??

]]> By: valio http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-834 valio Wed, 26 Aug 2009 20:04:08 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-834 Hmmm.. Here please: http://img220.imageshack.us/img220/5176/212d.jpg Hmmm..

Here please: http://img220.imageshack.us/img220/5176/212d.jpg

]]> By: valio http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-833 valio Wed, 26 Aug 2009 20:02:35 +0000 http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/#comment-833 Hello Seth! I rebuild all as you advised: <a href="http://img220.imageshack.us/i/212d.jpg/" rel="nofollow"></a> but it wasnt help to avoid problems: "Trouble solving algebraic loop.." as obvious on picture. Hello Seth!

I rebuild all as you advised:

but it wasnt help to avoid problems:
“Trouble solving algebraic loop..”
as obvious on picture.

]]>