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Giovanni O. de Sousa
Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Manaus
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Cleonor C. das Neves
Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Manaus
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Carlos Tavares da Costa Junior
Universidade Federal do Pará, Belém
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Marcus Ciro Martins Gomes
Instituto Federal do Pará, Belém
Keywords:
Dynamic systems modelling, Fuzzy control, Interval type-2 fuzzy control, Pharmacokinetic/ Pharmacodynamic modelling, Control of general anesthesia
Abstract
This work investigates the application of the type-2 fuzzy control’s technique in general anesthesia. Firstly, a literature review was made for the work. On this review, type-1 and interval type-2 fuzzy controllers were studied. And for the realization of the case study, an investigation of procedures in anesthesia was also made. After this study, a pharmacokinetic/pharmacodynamic mathematical model of the effect of the drugs Atracurium and Isoflurane in the human body was implemented. Type-1 and interval type-2 fuzzy controllers with two and four inputs were designed using the Fuzzy Logic Toolbox in MATLAB. Simulations of the control of anesthesia, from the mathematical model, were created using MATLAB scripts and validated with Simulink using four controllers for a performance comparison. Simulation results showed type-2 fuzzy controllers’ superiority against type-1 with the same number of inputs, however it was possible to see that the bigger number of inputs were beneficial for type-2 control as well as type-1. And finally, a comparative analysis was made, thus the conclusion was that type-2 fuzzy logic is a good alternative to control multivariable and nonlinear systems.
