This paper proposes a method for designing robust fractional-order proportional-integral (FOPI) controllers to be employed in a cascade control system. The FOPI controllers are employed for controlling two nested loops. The design is based on performance and robustness specifications in the frequency domain. Taking inspiration from well-known tuning rules, the open-loop frequency response in the two nested loops is shaped around the gain crossover frequency to obtain a nearly flat phase diagram, then a nearly constant phase margin. The method is tested to control the speed and position of a linearly sliding motor.
Cascade Fractional-Order PI Control of a Linear Positioning System / Lino, Paolo; Maione, Guido. - ELETTRONICO. - 51:4(2018), pp. 557-562. (Intervento presentato al convegno 3rd IFAC Conference on Advances in Proportional-Integral-Derivative Control, PID 2018 tenutosi a Ghent, Belgium nel May 09-11, 2018) [10.1016/j.ifacol.2018.06.154].
Cascade Fractional-Order PI Control of a Linear Positioning System
Lino, Paolo;Maione, Guido
2018-01-01
Abstract
This paper proposes a method for designing robust fractional-order proportional-integral (FOPI) controllers to be employed in a cascade control system. The FOPI controllers are employed for controlling two nested loops. The design is based on performance and robustness specifications in the frequency domain. Taking inspiration from well-known tuning rules, the open-loop frequency response in the two nested loops is shaped around the gain crossover frequency to obtain a nearly flat phase diagram, then a nearly constant phase margin. The method is tested to control the speed and position of a linearly sliding motor.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
