Controle LPV robusto na estrutura RST aplicado à malha de velocidade de uma máquina de relutância variável 6/4

Abstract

This work presents a robust Linear parameter varying (LPV) controller in the Reference Signal Tracking (RST) structure to the speed control of a Switched Reluctance Machine (SRM) 6/4. This machine has a simulator that considers the nonlinearities present in the SRM operation. The dynamics of the speed loop was based on a discrete autoregressive with exogenous inputs (ARX) LPV model identified for a range of operation from data collected in simulation, where the scheduling parameter was the normalized filtered current level. With the model parameters, the LPV controller parameters were determined by means of a convex optimization problem, in the form of a parameterized LMI (PLMI). Thus, the performance of the LPV controller subjected to the variation of the scheduling parameters was compared to conventional controllers with fixed parameters.