View source for OpenModelica/C2/Examples-through-OMEdit/English-timed

{| border=1
|| '''Time'''
|| '''Narration'''

|-
|| 00:01
| | Welcome to this '''spoken tutorial''' on '''Examples through OMEdit'''.

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| | 00:06
| | In this tutorial, we will learn to open and '''simulate''' different '''Modelica library classes'''.

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| | 00:13
|| To record this tutorial, I am using : '''OpenModelica version 1.9.5''' and  '''Ubuntu Linux OS 14.04'''.

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| | 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'''.

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| | 00:37
| | To practice this tutorial, you should have '''OMEdit''' installed on your system.

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| | 00:43
||You should also know how to work on the '''OMEdit''' window.

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| | 00:47
||If not, please go through the previous '''OpenModelica''' tutorial on this website.

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| | 00:53
| | Let us switch to the '''OMEdit''' window.

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| | 00:57
| | On the left side of '''OMEdit''' window, we see the '''Libraries Browser'''. Here we can see a list of libraries.

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| |01:07
| |Let us expand the '''Modelica''' library. To do this, click on the arrow head to the left of the '''Modelica''' library.

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| | 01:16
| | Now I will demonstrate an example from the '''Electrical''' library.

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| |01:21
| | Expand the '''Electrical''' library.

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| | 01:24
||Click on the arrow head to the left of '''Electrical''' library.

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| | 01:28
||Under '''Electrical''', we find '''Analog''' library. 

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| | 01:32
||Let's expand the '''Analog''' library.

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|| 01:35
| | Once again, we see many different libraries displayed.

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| | 01:39
||Now, let’s expand the '''Example''' library.

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| | 01:43
||Here we can see different examples of '''Analog'''.

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| | 01:48
| | Next, we will open the '''class''' named '''Rectifier'''.

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| | 01:53
||Right-click on '''Rectifier''' and select '''Open Class'''.

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| | 01:58
||We can also double-click on the '''class''' name to open the class.

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| | 02:03
| | Now we are in the '''Modeling Perspective''' window.

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| | 02:07
||By default, the class opens in '''Diagram View'''.

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| | 02:11
||I have already demonstrated how to switch between different views earlier in this series.

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| | 02:18
| | Now let's switch to the '''Text View''' by clicking on the '''Text View''' icon.

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| | 02:24
||Here we can see the '''Modelica code''' pertaining to the '''Rectifier''' class.

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| | 02:30
| | Before simulating a '''model''', we need to check for the correctness of the model.

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| |02:36
| | To do this, first locate '''Check All Models''' button on the toolbar.

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| |02:42
| | This button has white coloured double ticks on it. Click on it.

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| | 02:48
|| Immediately, the '''Messages Browser''' opens at the bottom of the window.

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| | 02:54
||This will show messages pertaining to the '''Modelica''' class.

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| | 02:58
|| Now, let’s try to simulate the model.

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| | 03:00
|| On the toolbar, click on the green coloured arrow button.

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| | 03:07
||This is the '''Simulate''' button which is used to simulate the model.

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| | 03:13
||We can also press '''Ctrl''' and '''B''' keys to simulate the model.

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| | 03:18
|| On simulating, a new window opens.

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| | 03:21
| | It shows the compilation process of the class. 

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|| 03:26
| | Once the compilation is successful, the '''output window''' displays the message: '''Simulation process finished successfully'''. Close this window.

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| | 03:37
|| By default, the '''Plotting Perspective''' should now open in the '''OMEdit''' window.

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| | 03:43
||If it does not open, click the '''Plotting''' button at the bottom right.

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| | 03:48
||We can also press '''Ctrl''' and '''F3''' keys to open the '''Plotting Perspective'''.

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| | 03:54
| | Here we can see the simulation results of the '''Modelica''' class.

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| | 03:59
| | At the right of the '''Plotting Perspective''', look at the '''Variables Browser''' window.

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| | 04:05
| | Under '''Variables Browser''', we will learn to change input variable values of a '''Modelica''' class.

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| |04:13
|| By default, '''IDC = 500''', '''Losses = 2890.26'''

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| | 04:22
||Change the value of '''IDC''' and see how the values of '''Losses''' change.

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| | 04:28
| | Let us change the value of '''IDC''' from '''500''' to '''250'''

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| | 04:33
||and press '''Enter'''.

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| |04:37
| | Go to the top right corner of the window.

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| | 04:39
||Click '''Re-simulate''' button.

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| |04:42
| | The success message window will open.

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| | 04:46
||Close this window.

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| | 04:48
|| Once the simulation is completed, note the changes.'''Losses = 1756.77'''

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| | 04:57
|| Now let me demonstrate how to generate a '''plot'''.

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| | 05:01
||We will generate a plot between '''Losses''' and '''Time'''.

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| | 05:06
|| Click on the check box against the '''Losses''' variable.

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|| 05:10
|| We can see a plot between '''Time''' on the X-axis and '''Losses''' on the Y-axis.

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| | 05:17
||This plot describes the '''power losses''' for the '''diode bridge''' varying with '''time'''.

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|| 05:24
| | By default, the simulation runs from '''0''' to '''0.1''' unit time. 

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| | 05:31
||We can vary this interval using the '''Simulation Setup''' option.

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| | 05:36
| | To do this, go to the '''Modeling Perspective'''.

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| | 05:40
||Click on the '''Modeling''' button.

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|| 05:43
|| Click on the '''Simulation Setup''' option on the toolbar.

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| | 05:47
|| The '''Simulation Setup''' window opens.

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| | 05:50
| | Here, change the '''Start Time''' to '''0.01''' unit.

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| | 05:55
|| Ensure that '''Simulate''' check box is checked.

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| | 05:59
| | And then click on '''Ok'''.

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| | 06:02
|| Immediately we see the success message window.

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| | 06:06
| | Close this '''window'''.

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| | 06:08
| | The '''class''' is re-simulated with a simulation interval of '''0.01''' to '''0.1''' unit time.

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| | 06:16
|| Let's delete these results.

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| | 06:18
||To do so, right-click on '''Rectifier''' and then click on '''Delete Result'''.

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| | 06:26
||The result has now been deleted.

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|| 06:29
| | Now I will demonstrate an example from '''Mechanics''' library.

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| |  06:34
|| First we will expand the '''Mechanics''' library.

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| | 06:38
||Under '''Mechanics''', we find '''Multibody''' library. 

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| | 06:43
||Let's expand the '''Multibody''' library also.

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| | 06:47
|| After this, let's expand the '''Example''' library.

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| | 06:51
||Here we  can see different examples of '''Multibody''' Mechanics.

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| | 06:56
| | Next, we will expand the '''Elementary''' library.

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| | 07:00
| | Let us open the class named '''DoublePendulum'''.

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| | 07:04
||To do this, right-click on '''DoublePendulum''' and select '''Open Class'''.

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|| 07:11
| | The class opens in '''Text view'''.

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| | 07:14
| | Now, click on '''Check All Models''' button on the toolbar.

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| | 07:19
| | Observe the '''Messages Browser'''.

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| | 07:22
| |This will show messages pertaining to the '''Modelica''' class.

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| | 07:27
| | Now, let’s try to simulate the model.

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| | 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. 

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| | 07:43
| |  Under the '''Variables Browser''', let’s expand the '''damper''' variable. 

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| | 07:49
|| By default,  '''d =  0.1, relative angular acceleration(a_rel) = 11.567''' and  '''relative rotational angle [der(phi_rel)] = 4.1'''

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|| 08:05
| | Let us change the value of '''d''' from '''0.1''' to '''0.05'''.and press '''Enter'''.

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| | 08:14
| | Then click '''Re-simulate''' button.

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| | 08:17
| | After completion of the simulation, observe the changes.

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| | 08:22
| |'''relative angular acceleration (a_rel) = 15.449''' and  '''relative rotational angle [der(phi_rel)] = 4.359'''

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| | 08:33
| |  Now, we will generate a '''plot''' between '''relative angular acceleration''' and '''Time'''.

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| | 08:40
| | Click on the check box against '''a_rel''' variable.

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| | 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.

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| | 09:10
| |  To do this, go to the '''Modeling Perspective'''.

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| |  09:14
| |  Click on '''Simulation Setup''' option on the toolbar.

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| |  09:18
| | The '''Simulation Setup''' window opens.

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| |  09:21
| |  Here, change the '''Start Time''' to '''1''' unit and the '''Stop Time''' to '''5''' units.

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| | 09:28
| | Ensure that '''Simulate''' check box is checked.

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| | 09:32
| | Then click on '''Ok'''.

|-
| |  09:35
| | We get the success message window.

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| | 09:37
| | Close this window.

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| | 09:39
| |  The class is re-simulated with a simulation interval of '''1''' to '''5''' unit time.

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| | 09:45
| |  Once the necessary plot is generated, we can delete the results.

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| |  09:50
| | In the '''Variables Browser''', right click on '''DoublePendulum'''.

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| | 09:55
| |Select '''Delete Result'''. The result has now been deleted.

|-
| | 10:01
| | Let's summarize.

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||10:03
| | In this tutorial, we have learnt to open and simulate different '''Modelica library classes'''.

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||10:10
| | As an assignment:  Expand '''Magnetic''' library in '''Modelica'''.
 
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| | 10:16
| |Simulate '''SaturatedInductor''' class in '''FluxTubes''' library. 

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| | 10:21
| | Change the values of a few input variables and re-simulate.
 
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| | 10:26
| |Generate a '''Parametric plot''' between '''i''' and '''LossPower''' of variable '''r'''.

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| | 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.

|}