Open AccessFractional order PID optimal control in pH neutralization process
Author(s) -
L. H. Tong,
Ye Li,
Huangqiu Zhu,
W. T. Li
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/427/1/012002
Subject(s) - pid controller , control theory (sociology) , stability (learning theory) , inlet , controller (irrigation) , process (computing) , order (exchange) , computer science , mathematics , mathematical optimization , control (management) , control engineering , engineering , temperature control , mechanical engineering , agronomy , finance , artificial intelligence , machine learning , economics , biology , operating system
This paper proposed an optimal control scheme for pH neutralization process based on fractional order PID (FOPID) controller. In order to enhance the stability of the outlet-pH as well as minimize the consumption of chemicals, the design of the controller is transformed into a discrete nonconvex optimization problem and solved by the state transition algorithm. Furthermore, a comparative study between the fractional order PID and PID controllers is carried out. And considering the practical application, the disturbance from the inlet-flow-rate change and inlet-pH change was also investigated. The simulation results demonstrate the superiority of the proposed strategy.