Pole-zero analysis of a model-free and a model-based tuning strategy for Maglev system

Abstract

This paper presents a different insight into stability analysis not only on the basis of steady state behaviour of the output response, but also the transient state behaviour caused due to the re-distribution of the poles and zeroes of the system and the controller in the closed loop configuration by the chosen tuning technique. This work establishes a correlation between theoretical analysis and experimental response by pole-zero analysis and the impact of tuning techniques of a PID controller on Maglev system, thus helping in better understanding of the designing and fabrication of the controller. The effectiveness of two popular industrial tuning techniques, one model-free and one model-based tuning strategy, has been analysed on the basis shifting of the root locus due to the placement of the closed-loop poles and zeroes, and the proximity of actual and desired dominant poles for this highly sensitive system.