Brief Characteristic of Model

• educational laboratory model of hydraulic system
• suitable for studying and experiments relating to dynamic system control theory
• identification and control in real-time communication with PLC Micrologix 1200
• can be used in control by Matlab on the basis of OPC and DDE communication protocols

Gallery

Mechanical realization

• Model is composed of two cylindrical tanks, which are connected by a tube. Tanks are placed one above another and they constitute a system of tanks without mutual interactions. A liquid is fetched into the first tank from a bathtub through an inlet tube by a pump. It flows out from the second tank back to the bathtub under the thumb of hydrostatic pressure. It is possible to change an intersection size of outlets in both tanks by throttling screws. There are four different intersection sizes.
• Two tank system is two-capacitive without astatism, whereby the height of liquid level in the second tank h2 is controlled quantity.
• The frequency fm(t) constitutes the only input of laboratory model in term of systemic approach and is generated by frequency inverter Allen-Bradley PowerFlex 40 according to voltage U(t), which is connected to frequency inverter’s input from analog card of PLC in the range 0 – 10V.
• Input and output data from PLC can be processed by control algorithm directly in PLC or by algorithm, which is programmed in Matlab/Simulink on personal computer (PC), whereby communication between PLC and PC is carried out on the basis of DDE and OPC communication protocols.

Fig.1 Scheme of model's mechanical realization

Systemic description of model

• actuating inputs

• voltage of pump's motor attacehd to frequency inverter U (input for frequency control fm)

• disturbances

• change of tank output valves intersection, e.g. by opening next valves
• affect of nonmeasured disturbances d

• measured outputs

• height of liquid level in the first tank h1
• height of liquid level in the second tank h₂

Fig.2 Systemic description of model

Using the model in pedagogy

• courses

• Optimal and Nonlinear Systems (1st grade master degree)
• Control and Artificial Intelligenmce (1st grade master degree)

• bachelor theses

• KALIVODA, Jakub: Realisation of Control System for Hydraulic System on the basis of PLC
  (supervisor: doc. Ing. Anna Jadlovská, PhD., consultant: Ing. Štefan Jajčišin) - 2011

• diploma theses

• MATYS, Matúš: Predictive Control Design of Virtual Models of Physical Systems
  (supervisor: doc. Ing. Anna Jadlovská, PhD., consultant: Ing. Štefan Jajčišin) - 2013 (in preparation)
• TOMÁNEK, Marek: Neural Adaptive Control of Laboratory Model of Hydraulic System - Internet Approach
  (supervisor: doc. Ing. Anna Jadlovská, PhD., consultant: Ing. Štefan Jajčišin) - 2013 (in preparation)
• ČERKALA, Jakub: Application of Experimental Identification Results in Design of Control Algorithms for Model of Real Hydraulic System
  (supervisor: doc. Ing. Anna Jadlovská, PhD., consultant: Ing. Štefan Jajčišin) - 2012

Using the model in the research

• dissertation theses

• JAJČIŠIN, Štefan: Predictive Control Algorithms Design with Nonlinear Models of Physical Systems
  (supervisor: doc. Ing. Anna Jadlovská, PhD.) - 2013 (in preparation)

• publications

• 2012
  JADLOVSKÁ, A. - JAJČIŠIN, Š.: Using Neural Networks for Physical Systems Behaviour Prediction, In: AEI 2012 Conference: Applied Electrical Engineering and Informatics : proc. - Košice : FEI TU, 2012. - ISBN 978-80-553-1030-5. (AFC)  
  
  ČERKALA, J. - JADLOVSKÁ, A.: Experimental identification of nonlinear dynammic system using IDENT Tool in Matlab enviroment. In: Electrical Engineering and Informatics 3 : proceeding of the Faculty of Electrical Engineering and Informatics of the Technical University of Košice. - Košice : FEI TU, 2012 S. 46-51. - ISBN 978-80-553-0890-6, (AED) (in slovak) 
  
  ČERKALA, J. - JADLOVSKÁ, A.: Application use of Matlab-DDE communication with multi-program approach and real-time plotting for identification and process control of laboratory model. In: 20th Annual Conference Proceedings of the International Scientific Conference - Technical Computing Bratislava 2012, Hotel Sorea Regia, Bratislava, 7. November 2012, www.posterus.sk/tcb2012, CD-ROM, 8 s. ISBN 978-80-970519-4-5, (AFD)   (in slovak) 
  
• 2011
  JAJČIŠIN, Š. – JADLOVSKÁ, A.: Control of The Laboratory Model of Hydraulic System. In: Electroscope – online journal for Electrotechnics, Vol. 2011, No. III. ISSN 1802-4564, Available on internet: http://147.228.94.30/index.php?option=com_content&view=article&id=280:riadenie-laboratorneho-modelu-hydraulickeho-systemu-&catid=34:cislo-32011-&Itemid=48 (2011). (ADE)   (in Slovak)
  
  JAJČIŠIN, Š.: Verification of Control Algorithms with DDE Communication on Real Hydraulic System. In: SCYR 2011 : 11th Scientific Conference of Young Researchers of Faculty of Electrical Engineering and Informatics Technical University of Košice : proc. - Košice : FEI TU, 2011 S. 388-391. - ISBN 978-80-553-0644-5. (AFD)
  
  JAJČIŠIN, Š. – JADLOVSKÁ, A.: DDE and OPC Communication Protocols Application in Identification and Control of Real System, In: Electrical Engineering and Informatics 2 : Proceeding of the Faculty of Electrical Engineering and Informatics of the Technical University of Košice. - Košice, FEI TU, 2011 pp. 365-370. - ISBN 978-80-553-0611-7. (AED) (in Slovak)
• 2010
  ČERKALA, J. - JADLOVSKÁ, A.: System Identification Toolbox Application in Experimental Identification of Linear Dynamical Systems. In: Electrical Engineering and Informatics : Proceeding of the Faculty of Electrical Engineering and Informatics of the Technical University of Košice : September, 2010, Košice, Slovak Republic. - Košice : TU, 2010 S. 540-545. - ISBN 978-80-553-0460-1, (AED) (in slovak)