Analysis of performance of an RMRAC controller in discrete-time via Z transform and Delta transform

This paper presents a comparative study of performance between the Z Transform and the Delta Transform applied to a Robust Model Reference Adaptive Controller (RMRAC). To show the differences between the two discretization techniques, the design of a controller applied to an AC Power Source (ACPS) is performed. The simulation results are obtained in a scenario where the controller is implemented in a 16-bit fixed-point arithmetic with a sampling frequency of 25 kHz. In this work the ACPS is used to generate waveforms up to 1 kHz. It is observed that the RMRAC controller in discrete-time via Delta Transform presents better performance with fixedpoint arithmetic implementation when compared to the Z Transform.