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Simple alternatives to PID-type control for processes with variable time-delay

Dana Copot (UGent) , Mihaela Ghita (UGent) and Clara-Mihaela Ionescu (UGent)
(2019) PROCESSES. 7(3).
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Abstract
Process industries include chemicals, petrochemicals, pulp and paper, steel, minerals, food, and power generation industries. Although diverse, all of these share common dynamics in terms of continuous variables and rely on the same measurements, e.g., level, flow, temperature, and pressure. They also have common actuators, such as valves and pumps. Additionally, they have variable time delays from process dynamics, such as mixing effects, measurement lines, or wireless data communication protocols. Processes with variable time delay can often lead to poor performance and instability. This paper proposes a fractional-order (FO) control design with adaptive laws for dealing with such processes, and a comparison is analysed against other controllers established in the literature for delayed dynamics. Two examples are presented to illustrate the advantages of the proposed approach. A real time-embedded control setup and interface to industrial standard devices is tested to illustrate the implementation aspects of the proposed fractional-order control. Comparison with other established controllers is given.

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Please use this url to cite or link to this publication:

Chicago
Copot, Dana, Mihaela Ghita, and Clara-Mihaela Ionescu. 2019. “Simple Alternatives to PID-type Control for Processes with Variable Time-delay.” Processes 7 (3).
APA
Copot, D., Ghita, M., & Ionescu, C.-M. (2019). Simple alternatives to PID-type control for processes with variable time-delay. PROCESSES, 7(3).
Vancouver
1.
Copot D, Ghita M, Ionescu C-M. Simple alternatives to PID-type control for processes with variable time-delay. PROCESSES. 2019;7(3).
MLA
Copot, Dana, Mihaela Ghita, and Clara-Mihaela Ionescu. “Simple Alternatives to PID-type Control for Processes with Variable Time-delay.” PROCESSES 7.3 (2019): n. pag. Print.
@article{8618790,
  abstract     = {Process industries include chemicals, petrochemicals, pulp and paper, steel, minerals, food, and power generation industries. Although diverse, all of these share common dynamics in terms of continuous variables and rely on the same measurements, e.g., level, flow, temperature, and pressure. They also have common actuators, such as valves and pumps. Additionally, they have variable time delays from process dynamics, such as mixing effects, measurement lines, or wireless data communication protocols. Processes with variable time delay can often lead to poor performance and instability. This paper proposes a fractional-order (FO) control design with adaptive laws for dealing with such processes, and a comparison is analysed against other controllers established in the literature for delayed dynamics. Two examples are presented to illustrate the advantages of the proposed approach. A real time-embedded control setup and interface to industrial standard devices is tested to illustrate the implementation aspects of the proposed fractional-order control. Comparison with other established controllers is given.},
  articleno    = {146},
  author       = {Copot, Dana and Ghita, Mihaela and Ionescu, Clara-Mihaela},
  issn         = {2227-9717},
  journal      = {PROCESSES},
  language     = {eng},
  number       = {3},
  title        = {Simple alternatives to PID-type control for processes with variable time-delay},
  url          = {http://dx.doi.org/10.3390/pr7030146},
  volume       = {7},
  year         = {2019},
}

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