OpenModelica/C2/Examples-through-OMEdit/English-timed

Time	Narration
00:01	Welcome to this spoken tutorial on Examples through OMEdit.
00:06	In this tutorial, we will learn to open and simulate different Modelica library classes.
00:13	To record this tutorial, I am using : OpenModelica version 1.9.5 and Ubuntu Linux OS 14.04.
00:25	But, the process demonstrated in this tutorial is identical in other OS such as- Windows, Mac OS X or FOSSEE OS on ARM.
00:37	To practice this tutorial, you should have OMEdit installed on your system.
00:43	You should also know how to work on the OMEdit window.
00:47	If not, please go through the previous OpenModelica tutorial on this website.
00:53	Let us switch to the OMEdit window.
00:57	On the left side of OMEdit window, we see the Libraries Browser. Here we can see a list of libraries.
01:07	Let us expand the Modelica library. To do this, click on the arrow head to the left of the Modelica library.
01:16	Now I will demonstrate an example from the Electrical library.
01:21	Expand the Electrical library.
01:24	Click on the arrow head to the left of Electrical library.
01:28	Under Electrical, we find Analog library.
01:32	Let's expand the Analog library.
01:35	Once again, we see many different libraries displayed.
01:39	Now, let’s expand the Example library.
01:43	Here we can see different examples of Analog.
01:48	Next, we will open the class named Rectifier.
01:53	Right-click on Rectifier and select Open Class.
01:58	We can also double-click on the class name to open the class.
02:03	Now we are in the Modeling Perspective window.
02:07	By default, the class opens in Diagram View.
02:11	I have already demonstrated how to switch between different views earlier in this series.
02:18	Now let's switch to the Text View by clicking on the Text View icon.
02:24	Here we can see the Modelica code pertaining to the Rectifier class.
02:30	Before simulating a model, we need to check for the correctness of the model.
02:36	To do this, first locate Check All Models button on the toolbar.
02:42	This button has white coloured double ticks on it. Click on it.
02:48	Immediately, the Messages Browser opens at the bottom of the window.
02:54	This will show messages pertaining to the Modelica class.
02:58	Now, let’s try to simulate the model.
03:00	On the toolbar, click on the green coloured arrow button.
03:07	This is the Simulate button which is used to simulate the model.
03:13	We can also press Ctrl and B keys to simulate the model.
03:18	On simulating, a new window opens.
03:21	It shows the compilation process of the class.
03:26	Once the compilation is successful, the output window displays the message: Simulation process finished successfully. Close this window.
03:37	By default, the Plotting Perspective should now open in the OMEdit window.
03:43	If it does not open, click the Plotting button at the bottom right.
03:48	We can also press Ctrl and F3 keys to open the Plotting Perspective.
03:54	Here we can see the simulation results of the Modelica class.
03:59	At the right of the Plotting Perspective, look at the Variables Browser window.
04:05	Under Variables Browser, we will learn to change input variable values of a Modelica class.
04:13	By default, IDC = 500, Losses = 2890.26
04:22	Change the value of IDC and see how the values of Losses change.
04:28	Let us change the value of IDC from 500 to 250
04:33	and press Enter.
04:37	Go to the top right corner of the window.
04:39	Click Re-simulate button.
04:42	The success message window will open.
04:46	Close this window.
04:48	Once the simulation is completed, note the changes.Losses = 1756.77
04:57	Now let me demonstrate how to generate a plot.
05:01	We will generate a plot between Losses and Time.
05:06	Click on the check box against the Losses variable.
05:10	We can see a plot between Time on the X-axis and Losses on the Y-axis.
05:17	This plot describes the power losses for the diode bridge varying with time.
05:24	By default, the simulation runs from 0 to 0.1 unit time.
05:31	We can vary this interval using the Simulation Setup option.
05:36	To do this, go to the Modeling Perspective.
05:40	Click on the Modeling button.
05:43	Click on the Simulation Setup option on the toolbar.
05:47	The Simulation Setup window opens.
05:50	Here, change the Start Time to 0.01 unit.
05:55	Ensure that Simulate check box is checked.
05:59	And then click on Ok.
06:02	Immediately we see the success message window.
06:06	Close this window.
06:08	The class is re-simulated with a simulation interval of 0.01 to 0.1 unit time.
06:16	Let's delete these results.
06:18	To do so, right-click on Rectifier and then click on Delete Result.
06:26	The result has now been deleted.
06:29	Now I will demonstrate an example from Mechanics library.
06:34	First we will expand the Mechanics library.
06:38	Under Mechanics, we find Multibody library.
06:43	Let's expand the Multibody library also.
06:47	After this, let's expand the Example library.
06:51	Here we can see different examples of Multibody Mechanics.
06:56	Next, we will expand the Elementary library.
07:00	Let us open the class named DoublePendulum.
07:04	To do this, right-click on DoublePendulum and select Open Class.
07:11	The class opens in Text view.
07:14	Now, click on Check All Models button on the toolbar.
07:19	Observe the Messages Browser.
07:22	This will show messages pertaining to the Modelica class.
07:27	Now, let’s try to simulate the model.
07:31	To do so, click on the Simulate button on the toolbar.
07:35	Once the compilation is successful, the Plotting Perspective opens in the OMEdit window.
07:43	Under the Variables Browser, let’s expand the damper variable.
07:49	By default, d = 0.1, relative angular acceleration(a_rel) = 11.567 and relative rotational angle [der(phi_rel)] = 4.1
08:05	Let us change the value of d from 0.1 to 0.05.and press Enter.
08:14	Then click Re-simulate button.
08:17	After completion of the simulation, observe the changes.
08:22	relative angular acceleration (a_rel) = 15.449 and relative rotational angle [der(phi_rel)] = 4.359
08:33	Now, we will generate a plot between relative angular acceleration and Time.
08:40	Click on the check box against a_rel variable.
08:46	We see a plot between Time on the X-axis and a_rel on the Y-axis.
08:54	This plot describes the relative angular acceleration varying with Time.
09:00	By default, the simulation runs from 0 to 3 unit time.
09:06	Let's change this interval.
09:10	To do this, go to the Modeling Perspective.
09:14	Click on Simulation Setup option on the toolbar.
09:18	The Simulation Setup window opens.
09:21	Here, change the Start Time to 1 unit and the Stop Time to 5 units.
09:28	Ensure that Simulate check box is checked.
09:32	Then click on Ok.
09:35	We get the success message window.
09:37	Close this window.
09:39	The class is re-simulated with a simulation interval of 1 to 5 unit time.
09:45	Once the necessary plot is generated, we can delete the results.
09:50	In the Variables Browser, right click on DoublePendulum.
09:55	Select Delete Result. The result has now been deleted.
10:01	Let's summarize.
10:03	In this tutorial, we have learnt to open and simulate different Modelica library classes.
10:10	As an assignment: Expand Magnetic library in Modelica.
10:16	Simulate SaturatedInductor class in FluxTubes library.
10:21	Change the values of a few input variables and re-simulate.
10:26	Generate a Parametric plot between i and LossPower of variable r.
10:32	Watch the video available at the following link. It summarizes the Spoken Tutorial project.
10:41	The Spoken Tutorial Project Team conducts workshops, gives certificates to those who pass an online test. For more details, please write to us.
10:53	Do you have questions in this Spoken Tutorial? Please visit this site.
11:00	The FOSSEE team coordinates coding of solved examples of popular books. We give honorarium and certificates for those who do this. For more details, please visit this site.
11:15	The FOSSEE team helps migrate commercial simulator labs to OpenModelica.
11:22	We give honorarium and certificates for those who do this. For more details, please visit this site.
11:31	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
11:40	This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thank you for joining.

Contributors and Content Editors

Jyotisolanki, Pratik kamble, Sandhya.np14