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

fYear

2014

fDate

17-19 Oct. 2014

Firstpage

652

Lastpage

657

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;

fLanguage

English

Publisher

ieee

Conference_Titel

System Theory, Control and Computing (ICSTCC), 2014 18th International Conference

Conference_Location

Sinaia

Type

conf

DOI

10.1109/ICSTCC.2014.6982491

Filename

6982491