Lab: process design
Problem Statement and Instructions for
First Lab, CL417 Process Control
August 13, 2013
The first lab is about identifying the First order and Second order Transfer
Function of a Single Board Heater System (SBHS). The SBHS is hosted under virtual labs on a remote server and you have to access it remotely and perform experiments. Here is the list of things you have to do for the first lab.
Things to be done for first submission:
1. Go to http://vlabs.iitb.ac.in/sbhs/. Download the file Tutorial guide for Windows users. This is an audio video tutorial. Watch this tutorial to learn how to use the virtual laboratory for SBHS. Although the video uses scilab-5.3.3 for demonstration, you are expected to use the latest version of scilab which is scilab-5.4.1.
2. Give a step change in the Heater input from 50% to 80% after 300 seconds i.e. run the experiment with heater =50% for 300 seconds and then give a step change of 30% in heater. The Xcos Step Input block parameters are Step time = 300, initial value = 50 and final value = 80. Run this experiment for around 700 seconds or till the temperature reaches a steady state, whichever is greater. Remember to save the output plot before you close scilab.
3. You have the log file with you which has all the variable values. Use this file to plot the parameters later in case if you forget to save the plot generated by scilab. See the Step Analysis code to know how to read from files and plot.
4. If you want to do a fresh experiment again, note that you have to restart scilab and re-execute the python file (run.bat file for windows users).
1
If you run the scilab code directly without executing/re-executing the python file then you will get network error message on scilab console or scilab will simply plot your previous experiment file in real time.
5. Download the Step analysis code from the Downloads section on SBHS virtual lab home page.
6. Locate the data/log file created automatically in the StepTest
First Lab, CL417 Process Control
August 13, 2013
The first lab is about identifying the First order and Second order Transfer
Function of a Single Board Heater System (SBHS). The SBHS is hosted under virtual labs on a remote server and you have to access it remotely and perform experiments. Here is the list of things you have to do for the first lab.
Things to be done for first submission:
1. Go to http://vlabs.iitb.ac.in/sbhs/. Download the file Tutorial guide for Windows users. This is an audio video tutorial. Watch this tutorial to learn how to use the virtual laboratory for SBHS. Although the video uses scilab-5.3.3 for demonstration, you are expected to use the latest version of scilab which is scilab-5.4.1.
2. Give a step change in the Heater input from 50% to 80% after 300 seconds i.e. run the experiment with heater =50% for 300 seconds and then give a step change of 30% in heater. The Xcos Step Input block parameters are Step time = 300, initial value = 50 and final value = 80. Run this experiment for around 700 seconds or till the temperature reaches a steady state, whichever is greater. Remember to save the output plot before you close scilab.
3. You have the log file with you which has all the variable values. Use this file to plot the parameters later in case if you forget to save the plot generated by scilab. See the Step Analysis code to know how to read from files and plot.
4. If you want to do a fresh experiment again, note that you have to restart scilab and re-execute the python file (run.bat file for windows users).
1
If you run the scilab code directly without executing/re-executing the python file then you will get network error message on scilab console or scilab will simply plot your previous experiment file in real time.
5. Download the Step analysis code from the Downloads section on SBHS virtual lab home page.
6. Locate the data/log file created automatically in the StepTest