Question

a) Draw a block diagram representing the generic structure of a SISO open-loop control system. Draw a block diagram representing the generic structure of a SISO closed-loop control system. For each diagram, show (where relevant), the input, the output, any disturbance, the plant, the actuator, the compensator, and the sensor. [9 marks.] b) List three advantages and three disadvantages of open-loop control. [6 marks.] c) Figure 1 is a schematic of a liquid level control system. Here the automatic controller maintains the liquid level by comparing the desired height of liquid with the actual height and correcting for any error by adjusting the opening of the pneumatic value. Draw a functional block diagram for this system based on one of the generic representations developed in Part a). [10 marks.] Pneumatic valve Controller Inflow Outflow

          a) Draw a block diagram representing the generic structure of a SISO open-loop control
system. Draw a block diagram representing the generic structure of a SISO closed-loop
control system. For each diagram, show (where relevant), the input, the output, any
disturbance, the plant, the actuator, the compensator, and the sensor. [9 marks.]
b) List three advantages and three disadvantages of open-loop control. [6 marks.]
c) Figure 1 is a schematic of a liquid level control system. Here the automatic controller
maintains the liquid level by comparing the desired height of liquid with the actual height
and correcting for any error by adjusting the opening of the pneumatic value. Draw a
functional block diagram for this system based on one of the generic representations
developed in Part a). [10 marks.]
Pneumatic
valve
Controller
Inflow
Outflow

a) Draw a block diagram representing the generic structure of a SISO open-loop control
system. Draw a block diagram representing the generic structure of a SISO closed-loop
control system. For each diagram, show (where relevant), the input, the output, any
disturbance, the plant, the actuator, the compensator, and the sensor. [9 marks.]
b) List three advantages and three disadvantages of open-loop control. [6 marks.]
c) Figure 1 is a schematic of a liquid level control system. Here the automatic controller
maintains the liquid level by comparing the desired height of liquid with the actual height
and correcting for any error by adjusting the opening of the pneumatic value. Draw a
functional block diagram for this system based on one of the generic representations
developed in Part a). [10 marks.]
Pneumatic
valve
Controller
Inflow
Outflow

Added by Sydney A.

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