tuned parameters of pid for optimization of losses in magnetic levitation system

In this paper a new method is proposed for determining pid controller parameters in order to decrease losses in levitation system of magnetic trains. it is assumed that this system is a hybrid system and it consists of electric and permanent magnet. for optimization of losses initially ac losses of magnetic levitation system are calculated. linear model of levitation system as well as modeling the system is offered. the parameters related to pid controller are tuned with ziegler–nichols method and optimizing methods using genetic algorithm. the corresponding results are compared.