Diagnosis of Cascade Control Loop Status Using Performance Analysis Based Approach

2006 ◽  
Vol 45 (22) ◽  
pp. 7540-7551 ◽  
Author(s):  
Junghui Chen ◽  
Yuezhi Yea ◽  
Cho-Kai Kong
Keyword(s):  
Performance Analysis ◽  
Cascade Control ◽  
Control Loop

Cascade control strategy for external carbon dosage in predenitrifying process

2002 ◽  
Vol 45 (4-5) ◽  
pp. 53-60 ◽  
Author(s):  
J.-H. Cho ◽  
S.W. Sung ◽  
I.-B. Lee
Keyword(s):  
Control Strategy ◽  
Disturbance Rejection ◽  
Nitrate Concentration ◽  
Cascade Control ◽  
Control Loop ◽  
Relay Feedback ◽  
Point Tracking ◽  
Pi Controllers ◽  
Good Set

We propose a cascade control strategy composed of two Proportional-Integral (PI) controllers to regulate the nitrate concentration in the predenitrifying process by manipulating the external carbon dosage. It controls the nitrate concentrations in the effluent as well as in the final anoxic reactor simultaneously to strictly satisfy the quality of the effluent as well as to remove the effects of disturbances more quickly. The design of two PI controllers in the cascade control loop can be completed with the Ziegler–Nichols (Z–N) tuning rule together with a simple relay feedback identification method. Results from the Benchmark simulation confirm that both good set point tracking and satisfactory disturbance rejection can be guaranteed due to the structural advantages of the proposed cascade control strategy. Also, compared with a previous work, the fluctuation of the nitrate concentration in the effluent has been decreased significantly.

Performance Analysis of a Comparator Based Mixed-Signal Control Loop in 28 nm CMOS

2019 ◽  
Author(s):  
Florian Protze ◽  
Martin Kreisig ◽  
Frank Ellinger ◽  
Sebastian Hoppner ◽  
Stephan Hartmann ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Signal Control ◽  
Control Loop ◽  
Mixed Signal ◽  
28 Nm
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