Controls Lab OnLine


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Assignment 11

Web Assignment 11
Proportional Feedback Control Experiments
1. You got here. Good going
2. Today, it is run-a-feedback-control-experiment day. Use the same parameters that you found in you modeling in Assignment 9 for today's experiments
3. Click on "Proportional Feedback Control Experiments"
4. Fill in your name, location & email name and then select a "length of experiment" and values for the experiment.
5. Observe the results.
6. Analyse the results as to whether the response is in agreement with the response expected or as modelled in last Assignment.
7. Repeat the experiment for different controller tunings.
In the instructions #4 through #7, it is somewhat vague about what values to use as Kc.

Here is a suggestion: Find the largest value that you think reasonable for Kc (This should be close to Kcu -- let's say 25 %/out-unit)

Then find the smallest that you think reasonable for Kc (This should be close to Kc-cd -- let's say 1 %/out-unit)

Pick about 5 to 10 values of Kc in this range (or slightly beyond the range is OK, too).

(let's say-- 40, 25, 20, 15, 10, 5, 2, 1, 0.5, for examples)

Run an experiment with all other parameters the same for all experiments and vary Kc over the values in this list.

Look at all the graphs, look at offset, overshoot, decay ratio, frequency, for all of them. Make a table of all these results, in order according to Kc

Then describe the table, include it in your assignment report and discuss what you observe.

8. Again analyse the results as to whether the response is in agreement with the response expected or as modelled in last Assignment.
9. Send an e-mail (report) within the next few days. (Click on "report" to get instructions.)
**** CONTINUOUS IMPROVEMENT ***

For suggestions and feedback,

contact Jim Henry - Lab-Master Send E-Mail to Jim Henry
15 November 1997, Last revised 15 April 1998

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