Title :
Frequency domain design of fractional order PI controllers for lambda control
Author :
Precup, Radu-Emil ; Bota, Dan Cristian ; Dragos, Claudia-Adina ; Stinean, Alexandra-Iulia ; Preitl, Stefan ; Radac, Mircea-Bogdan
Author_Institution :
Dept. of Autom. & Appl. Inf., Politeh. Univ. of Timisoara, Timisoara, Romania
Abstract :
This paper proposes the frequency domain design of fractional order proportional-integral (FOPI) controllers for lambda control in the framework of automotive engine control systems. A simplified first order plus dead time model of the process is used in the design. The flatness of the open-loop Bode phase plot around the gain crossover frequency is imposed as a constraint in the frequency domain design that results in tuning conditions for FOPI controllers. The comparison of FOPI versus integer order PI controllers is supported by digital simulation results.
Keywords :
PI control; frequency-domain synthesis; fuel systems; internal combustion engines; open loop systems; FOPI controller; automotive engine control systems; digital simulation; fractional order PI controllers; fractional order proportional-integral controller; frequency domain design; gain crossover frequency; integer order PI controllers; lambda control; open-loop Bode phase plot flatness; simplified first order plus dead time model; tuning condition; Control systems; Engines; Frequency-domain analysis; Mathematical model; Process control; Transfer functions; Tuning; automotive engine control systems; constraints; fractional order PI controllers; frequency domain design; lambda control;
Conference_Titel :
System Theory, Control and Computing (ICSTCC), 2014 18th International Conference
Conference_Location :
Sinaia
DOI :
10.1109/ICSTCC.2014.6982491
