Implementação Simplificada de Controle Não Linear em FPGA In The Loop Para Conversor Boost Baseado na Técnica Takagi-Sugeno Fuzzy

Abstract

This work proposes the non-linear control of a DC-DC converter to a higher voltage, also known as Boost or Step-up converter. To solve the recurring problem resulting from non-linearity in the mathematical modeling of this converter, it is done a proposal of the development of a robust control starting from the Takagi-Sugeno Fuzzy (TSF) model with integration to the Internal Model Control (IMC). For the obtaining of controller IMC-TSF’s gains, it was adopted the Linear Matrix Inequality technique. The validation of the proposed control is accomplished through the approach of test Hardware in the Loop (HIL) applied to FPGA, that receives the name of FPGA in the Loop (FIL). However, the controllers TSF request many mathematical operations, that result in the increase of the cost computational and in the reduction of speed of execution of the control algorithm implemented in FPGA. For that reason, in this work is described a mathematical simplification in order to reducing the number of mathematical operations in the control algorithm. Based on the purpose of proving the controller’s robustness of the IMC-TSF, the simulations were accomplished for several types of loads on the controller output and besides, disturbances in the controller input voltage were considered. The obtained results evidence the advantages of the proposed approach.