The oil temperature is being controlled in a cascade control system as shown in Figure 1. A) Highlight the benefits of using the cascade control instead of the conventional feedbach control. B) What is the Cascade control design criteria? C) What is the primary variable in the cascade loop?

Elements Of Electromagnetics
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The oil temperature is being controlled in a cascade control system as shown in Figure 1.
A) Highlight the benefits of using the cascade control instead of the conventional feedback
control.
B) What is the Cascade control design criteria?
C) What is the primary variable in the cascade loop?
D) What is the secondary variable in the cascade loop?
E) What is the manipulated variable in the inner loop?
F) Explain whether a disturbance in the fuel gas feed pressure will be removed rapidly with
the cascade loop?
G) Explain whether a disturbance in the oil temperature will be removed rapidly with the
cascade loop?
H) Draw a complete block diagram of the system indicating all the inner and outer level
controllers, process blocks and disturbance blocks.
I) If the inner loop has proportional-only controller for Ge2, and G 6, and
Gp2(s) =
4s+1
derive a constraint (inequality) for the value of Kc so that the inner loop
still has stable behavior. Assume that there is no disturbance effect in the inner loop.
Callege of Electronics Engineering
Cascade Control
Department of Systems and control Engineering
TC
Stack gas
Set point
PC
Hot
oil
PT
Cold
oil
Fuel gas
Furnace
Figure 1
Transcribed Image Text:The oil temperature is being controlled in a cascade control system as shown in Figure 1. A) Highlight the benefits of using the cascade control instead of the conventional feedback control. B) What is the Cascade control design criteria? C) What is the primary variable in the cascade loop? D) What is the secondary variable in the cascade loop? E) What is the manipulated variable in the inner loop? F) Explain whether a disturbance in the fuel gas feed pressure will be removed rapidly with the cascade loop? G) Explain whether a disturbance in the oil temperature will be removed rapidly with the cascade loop? H) Draw a complete block diagram of the system indicating all the inner and outer level controllers, process blocks and disturbance blocks. I) If the inner loop has proportional-only controller for Ge2, and G 6, and Gp2(s) = 4s+1 derive a constraint (inequality) for the value of Kc so that the inner loop still has stable behavior. Assume that there is no disturbance effect in the inner loop. Callege of Electronics Engineering Cascade Control Department of Systems and control Engineering TC Stack gas Set point PC Hot oil PT Cold oil Fuel gas Furnace Figure 1
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