Determine the gain of the proportional controller.

  • Thread starter rrab186
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  • #1
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The block diagram (attached) shows the control of an electric heating
system. The heater is driven from a voltage-controlled power supply, the
voltage V1 being derived from a potientiometer. The output temperature,
θO, is subject to disturbances, θD, because of changes in the ambient
temperature. It is proposed to apply 'disturbance feedback control' to the
system by the inclusion of a transducer that measures the external
temperature and feeds a signal back to the input via a proportional
controller of gain H.


Determine the required value of H to eliminate the effect of the disturbance


Don't really know where to start with this, would be gratefull for any help. Thanks!
 

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  • #2
NascentOxygen
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rrab186, if you get no help with this in the next 24 hrs, could I suggest that you replace the .doc with a .jpg as I don't have the software to view .doc files.
 
  • #3
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Here's a jpeg of the diagram.

I have managed to get an answer of 25, not sure if this is correct.
 

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  • #4
NascentOxygen
Staff Emeritus
Science Advisor
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1,072
Here's a jpeg of the diagram.

I have managed to get an answer of 25, not sure if this is correct.
So you've figured it out? What units would it have if you actually built it?
 

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