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FEED FORWARD (REF: STEPHANOPOULOS)

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  • FEED FORWARD (REF: STEPHANOPOULOS)

  • FEED FORWARD (REF: STEPHANOPOULOS)

  • FEED FORWARD (REF: STEPHANOPOULOS)

  • EXAMPLE STIRRED TANK HEATERExample 21.2; pg 415, Stephanopoulos G.

  • EXAMPLE STIRRED TANK HEATERExample 21.2; pg 415, Stephanopoulos G.

    Requirements to design control strategies

    Control objectives/variables DisturbancesManipulated variables

  • EXAMPLE STIRRED TANK HEATERControl objective To keep the temperature of the liquid constant

    Manipulated variable Flow of the steam in

    Disturbance liquid flow rate and liquid inlet temperature

  • FEEDBACK CONTROL

    Control loop ????

  • FEEDBACK CONTROL

  • EXAMPLE STIRRED TANK HEATER

    Block Diagram of feed back control

  • FEED FORWARD

  • FEED FORWARD

  • FEED FORWARD

    Block Diagram of feed forward control

  • Process block diagram Feed forward loop

    Feed forward loop with measuring device and control element

  • Process block diagram Feed forward loop

    Feed forward loop with measuring device and control element

  • a) Process block diagram (uncontrolled) b) Feed forward loop

    c) Feed forward loop with measuring device and control element

  • FEEDBACK FEED FORWARD


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