Difference between revisions of "OpenModelica/C2/Examples-through-OMEdit/English-timed"
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| | '''Spoken Tutorial '''and '''FOSSEE''' projects are funded by '''NMEICT, MHRD''', Government of India. | | | '''Spoken Tutorial '''and '''FOSSEE''' projects are funded by '''NMEICT, MHRD''', Government of India. | ||
Revision as of 16:32, 29 December 2017
| 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 tutorials 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 Variable 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: conduct 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.
Thanks you for joining. |
