The Open Electrical & Electronic Engineering Journal
2018, 12 : 110-120Published online 2018 December 28. DOI: 10.2174/1874129001812010110
Publisher ID: TOEEJ-12-110
RESEARCH ARTICLE
Experimental Design and Verification of Extended State Observers for Magnetic Levitation System Based on PSO
* Address correspondence to this author at the Control ad Systems Engineering Department, University of Technology, Baghdad, Iraq; Tel: +964-7901227676; E-mails: ; 601116@uotechnology.edu.iq
ABSTRACT
Introduction:
This work presents analysis, design and implementation of two schemes of Extended State Observer (ESO) to estimate the position, velocity and unmeasurable states for magnetic levitation systems, Linear ESO (LESO) and Nonlinear ESO (NESO). The multiplicity of design parameters for both LESO and NESO made it difficult to find appropriate setting of these parameters such that to reach satisfactory performance of observation process.
Methods:
Particle Swarm Optimization (PSO) technique is used to improve performance of observation process by finding optimal tuned parameters of observer design parameter subjected to specified performance index. Theoretical results of both observers are firstly implemented in the environment of MATLAB/SIMULINK. Then, experimental state estimation of observers is set up based on feedback instrument (33-942S) to verify the simulated results.
Results and Conclusion:
Root Mean Square (RMS) of estimation error has been used as an indicator to assess the performance of observers. The simulated and practical results showed that LESO could give better estimation performance than NESO.