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Design and Implementation of Supervisory Control for an Electropneumatic Station Subject to Faults in Material Flow

[+] Author Affiliations
Rodrigo Szpak, Max Hering de Queiroz

Universidade Federal de Santa Catarina, Florianópolis, Brazil

Paper No. FPNI2016-1542, pp. V001T01A028; 9 pages
doi:10.1115/FPNI2016-1542
From:
  • 9th FPNI Ph.D. Symposium on Fluid Power
  • 9th FPNI Ph.D. Symposium on Fluid Power
  • Florianópolis, SC, Brazil, October 26–28, 2016
  • Conference Sponsors: Fluid Power Net International (FPNI), Federal University of Santa Catarina (UFSC), Brazil
  • ISBN: 978-0-7918-5047-3
  • Copyright © 2016 by ASME

abstract

Human intervention in automated manufacturing systems may result in faults in material flow leading to incoherent behavior of the control system. Particularly when multiple workpieces can be operated concurrently, the design of a programmable logic controller (PLC) that can handle such nondeterministic events is a complex task that justifies the use of formal methods such as the Supervisory Control Theory (SCT). The main objective of this work is the use of SCT for the systematic design of the automation system of an electro-pneumatic station of a Modular Production System prone to faults in the material flow. A code generation tool has been used to translate the modular supervisors into an IEC61131 PLC program, whose automata-based structure has been exploited by several functionalities of a SCADA System. The implementation of supervisory control allows the station to flexibly process five workpieces simultaneously, with conformance to functional requirements and with safety to deal with the nondeterministic removal of workpieces along the station.

Copyright © 2016 by ASME

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