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Determine the gain of the proportional controller.

  1. Sep 13, 2012 #1
    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!
     

    Attached Files:

  2. jcsd
  3. Sep 14, 2012 #2

    NascentOxygen

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    Staff: Mentor

    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.
     
  4. Sep 14, 2012 #3
    Here's a jpeg of the diagram.

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

    Attached Files:

  5. Sep 14, 2012 #4

    NascentOxygen

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    Staff: Mentor

    So you've figured it out? What units would it have if you actually built it?
     
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