A machine for making paper is shown below. There are two main parameters under feedback control:...

 

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A machine for making paper is shown below. There are two main parameters under feedback control: the density of fibers as controlled by the consistency of the thick stock that flows from the headbox onto the wire, and the moisture content of the final product that comes out of the dryers. Stock from the machine chest is diluted by white water returning from under the wire, as controlled by a control valve (CV). A meter supplies a reading of the consistency. At the 'dry end of the machine, there is a moisture sensor. a) Draw the block diagram and identify the following parameters for the control of consistency: The process AND its desired output signal The sensor The actuator AND its output signal The controller AND its output signal The reference signal The error signal b) Draw the block diagram and identify the following parameters for the control of moisture: - The process AND its desired output signal The sensor Machine chest The actuator AND its output signal The controller AND its output signal The reference signal The error signal Thick stock Consistency Valve input sensor Controller White water Head box Wire IMAO Dryers Dryer control input Moisture sensor Paper A machine for making paper is shown below. There are two main parameters under feedback control: the density of fibers as controlled by the consistency of the thick stock that flows from the headbox onto the wire, and the moisture content of the final product that comes out of the dryers. Stock from the machine chest is diluted by white water returning from under the wire, as controlled by a control valve (CV). A meter supplies a reading of the consistency. At the 'dry end of the machine, there is a moisture sensor. a) Draw the block diagram and identify the following parameters for the control of consistency: The process AND its desired output signal The sensor The actuator AND its output signal The controller AND its output signal The reference signal The error signal b) Draw the block diagram and identify the following parameters for the control of moisture: - The process AND its desired output signal The sensor Machine chest The actuator AND its output signal The controller AND its output signal The reference signal The error signal Thick stock Consistency Valve input sensor Controller White water Head box Wire IMAO Dryers Dryer control input Moisture sensor Paper