Open AccessSimulation of Active Control Using Fuzzy Logic Applied to a Pulse Combustor
Author(s) -
César Augusto Botura,
Galdenoro Botura,
João Andrade de Carvalho,
Lígia Garcia Mesquita,
Marco Aurélio Marques Ferreira
Publication year - 2002
Publication title -
revista brasileira de ciências mecânicas
Language(s) - English
Resource type - Journals
ISSN - 0100-7386
DOI - 10.1590/s0100-73862002000200010
Subject(s) - control theory (sociology) , combustor , fuzzy logic , signal (programming language) , controller (irrigation) , fuzzy control system , pulse (music) , matlab , control system , pressure control , phase (matter) , amplitude , combustion , computer science , simulation , engineering , control (management) , physics , mechanical engineering , electrical engineering , chemistry , voltage , agronomy , organic chemistry , quantum mechanics , artificial intelligence , programming language , biology , operating system
This work analyzes an active fuzzy logic control system in a Rijke type pulse combustor. During the system development, a study of the existing types of control for pulse combustion was carried out and a simulation model was implemented to be used with the package Matlab and Simulink. Blocks which were not available in the simulator library were developed. A fuzzy controller was developed and its membership functions and inference rules were established. The obtained simulation showed that fuzzy logic is viable in the control of combustion instabilities. The obtained results indicated that the control system responded to pulses in an efficient and desirable way. It was verified that the system needed approximately 0.2 s to increase the tube internal pressure from 30 to 90 mbar, with an assumed total delay of 2 ms. The effects of delay variation were studied. Convergence was always obtained and general performance was not affected by the delay. The controller sends a pressure signal in phase with the Rijke tube internal pressure signal, through the speakers, when an increase the oscillations pressure amplitude is desired. On the other hand, when a decrease of the tube internal pressure amplitude is desired, the controller sends a signal 180º out of phase