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[ pdf ] Control system design using Supervisory Control Theory

Control system design using Supervisory Control Theory Download
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Source: www.diee.unica.it 
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Last download on: Thu Apr 12, 2018 01:54:58 AM
Short Desciption:
Theory to implementation, This Master thesis deals with the design of the program for a control unit using Supervisory Control Theory (SCT) introducing a systematic methodology for development of event- driven supervisory control systems. Different difficulties arises in physical implementation of SCT and unfortunately there is still a gap between the theoretical development and the number of applications of SCT in the industry.

he approach presented in this thesis is based on the introduction of different behavioural models among the entries of the SCT. Both input and output electric signals of the PLC have been modelled to take into account the gap between an automaton event and a logic signal. A model of the interactions between the control unit and the process is included in the Plant model to facilitate the extraction of the controller behaviour from the supervisor. An approach to obtain from the Supervisor a Controller straightforwardly implementable is presented. The Controller is implemented as a Mealy machine. The obtained Controller is exploited as input for the automatic generation of the PLC control program. Two Use Case Studies have been treated to experiment the presented methodology. The first one deals with the control of an automatic gate for a car park while the second one controls a pick and place station. Both the use case studies are high detailed with built automata models and generated PLC control code
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