DocumentCode :
722988
Title :
Fractional order controllers for urban wastewater treatment systems
Author :
Barbu, Marian ; Ceanga, Emil
Author_Institution :
Dept. of Autom. Control & Electr. Eng., “Dunarea de Jos” Univ. of Galati, Galati, Romania
fYear :
2015
fDate :
16-19 June 2015
Firstpage :
1174
Lastpage :
1179
Abstract :
One of the important issues affecting the quality of the results obtained in the control of wastewater treatment plants is the influence of influent variations on the effluent quality. Thus, treating the influent as a periodical disturbance has enabled us already to obtain a significant result in the control of these systems. But the results are more modest if there are irregularities on the influent diurnal variation. In the present paper a new solution has been proposed to the problem of reducing the effect of quasi-periodic disturbances in wastewater treatment urban plants, solution that uses a fractional-order subsystem. Since the process parameters change with the operating regime and the controller contain a fractional-order subsystem, the Quantitative Feedback Theory (QFT) frequency method has been used in order to design a robust controller for the considered control loop. The proposed control structure has been validated on a Activated Sludge Model No. 1 (ASM1) based WWTP implemented in SIMBA®.
Keywords :
control system synthesis; effluents; feedback; robust control; sludge treatment; wastewater treatment; ASM1; QFT; SIMBA; WWTP; activated sludge model no 1; control loop; effluent quality; fractional order controllers; fractional-order subsystem; influent diurnal variation; quantitative feedback theory frequency method; quasi-periodic disturbances; robust controller design; urban wastewater treatment systems; wastewater treatment urban plants; Approximation methods; Gain; Numerical stability; Power harmonic filters; Process control; Transfer functions; Wastewater treatment; Fractional order systems; Robust control; Wastewater Treatment Processes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control and Automation (MED), 2015 23th Mediterranean Conference on
Conference_Location :
Torremolinos
Type :
conf
DOI :
10.1109/MED.2015.7158914
Filename :
7158914
Link To Document :
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