Loading...

PLC Implementation of Fractional Order Controllers

Aghaee, Mehdi | 2013

1636 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44242 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tavazoei, Mohammad Saleh
  7. Abstract:
  8. In this thesis, various fractional order controllers (FOCs), e.g., FO-PID, FO-TID, CRONE and FO-Lead/Lag, are implemented using PLC. For this purpose first, several methods are used to approximate the differentiator and integral operators. Based on these methods, the equivalent rational transfer functions of the fractional order controllers are obtained. Then, using STEP7 software, the FOCs are implemented in Siemens PLC. Moreover, to facilitate the use of the implemented FOCs in the industry and to take full advantage of the controllers, WinCC software as an interface between human and machine (HMI) is used. The WinCC software enables the operator to access the PLC through a computer (PC) using the PROFIBUS or MPI networks. Therefore, the operator can select the method of approximation and is able to change the controller parameters, e.g., controller order, sampling rate, using a graphical user interface. All implemented FOCs including different approximation methods are included in a toolbox. Finally, the simulation results carried out in MATLAB are compared with the results obtained from PLC. The results show that the implemented controllers in PLC propose very good accuracy
  9. Keywords:
  10. Fractional Order Controller ; Programmable Logic Controller (PLC) ; Fractional Order Operators Approximation ; Human-Machine Interface (HMI)

 Digital Object List

 Bookmark

...see more