Fractional order control of the injection system in a CNG engine

Author

Lino, Paolo ; Maione, Guido

Author_Institution

Dept. of Electr. & Inf. Eng., Tech. Univ. of Bari, Bari, Italy

fYear

2013

Firstpage

3997

Lastpage

4002

Abstract

Common rail injection systems of compressed natural gas (CNG) engines require robust control, because of large variations in their parameters and working conditions and because of their highly nonlinear behavior. This paper shows that a noninteger (fractional) order PI (or FOPI) controller, designed by a loop-shaping approach, improves robustness to parameter variations and guarantees an optimal performance. Efficacy of the FOC is tested by simulation based on a CNG linearized model and on the approximation of the FOC by a rational transfer function.

Keywords

PI control; approximation theory; control system synthesis; fuel systems; internal combustion engines; linearisation techniques; nonlinear control systems; pressure control; robust control; transfer functions; CNG engine; CNG linearized model; FOC approximation; FOPI controller design; compressed natural gas; fractional order PI controller; fractional order control; injection system; loop-shaping approach; noninteger order PI controller; nonlinear behavior; parameter variations; proportional-integral control; rational transfer function; robust control; Approximation methods; Engines; Fuels; Rails; Transfer functions; Tuning; Valves; Fractional-order proportional-integral controllers; approximation of irrational operators; compressed natural gas engines; injection systems; loop-shaping;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 2013 European

Type

conf

Filename

6669420