1. Slovak University of Technology in Bratislava , Faculty of Materials Science and Technology in Trnava, Institute of Applied Informatics, Automation and Mechatronics , Ulica Jána Bottu Č. 25, 917 24 Trnava , Slovak Republic
2. Tomas Bata University of Zlin , Faculty of Applied Informatics, Department of Automation and Control Engineering , Nad Stráněmi 4511, 760 05 Zlín , Czech Republic