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For an operating point half way up the parallel section and the discharge valve and the discharge fully open, design a proportional only controller which will give closed loop dynamics 1/3 that of the open loop plant. The program should sample the analogue signals very rapidly compared to the dynamics of the process (1 second sampling), so that it will behave much like a continuos (analogue) system. We will in fact look at digital control later in the Lab.
Investigate the effect on your controller's performance, that the action of altering the discharge valve position would have. Does the observation tie in with theoretical expectations?
Observe the consequences of increasing the controller gain and changing the operating point. Try reducing the gain of the controller and see if you can make generalisations about the effect of proportional gain. Your theory should help.
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