An improved hybrid approach for the PLC-based implementation of reduced RW supervisors

Murat UZAM; Gökhan GELEN

Article Details

An improved hybrid approach for the PLC-based implementation of reduced RW supervisors

Authors:

Murat UZAM | Gökhan GELEN

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 2, pp.394-419

Document Type:

Article

Publication Date:

1/2013

Document Language:

Turkish

Document ID (Org No.):

2000743341

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

A successful application of a hybrid (mixed Petri  net/automaton) approach for the real-time supervisory control of an  experimental manufacturing system was reported recently.  The hybrid  approach includes a Ramadge--Wonham (RW) supervisor in the form of an  automaton.  The reduced RW supervisor offers fewer states for the  programmable logic controller (PLC) implementation of the hybrid  controller with less memory requirements, but due to a problem called  the avalanche effect, the PLC implementation of the hybrid controller  with the reduced RW supervisor was not possible.  This paper proposes  a method to both detect and eliminate the avalanche effect problem for  a RW supervisor in the form of an automaton, which enables the PLC  implementation of the hybrid controller with the reduced RW  supervisor.  In addition, this paper improves the recently proposed  hybrid approach by including the reduced RW supervisor and the  avalanche effect detection and elimination method.  The applicability  of the improved hybrid approach is demonstrated by the PLC-based  real-time control of an experimental manufacturing system.

 

A successful application of a hybrid (mixed Petri  net/automaton) approach for the real-time supervisory control of an  experimental manufacturing system was reported recently.  The hybrid  approach includes a Ramadge--Wonham (RW) supervisor in the form of an  automaton.  The reduced RW supervisor offers fewer states for the  programmable logic controller (PLC) implementation of the hybrid  controller with less memory requirements, but due to a problem called  the avalanche effect, the PLC implementation of the hybrid controller  with the reduced RW supervisor was not possible.  This paper proposes  a method to both detect and eliminate the avalanche effect problem for  a RW supervisor in the form of an automaton, which enables the PLC  implementation of the hybrid controller with the reduced RW  supervisor.  In addition, this paper improves the recently proposed  hybrid approach by including the reduced RW supervisor and the  avalanche effect detection and elimination method.  The applicability  of the improved hybrid approach is demonstrated by the PLC-based  real-time control of an experimental manufacturing system.

Article Details

An improved hybrid approach for the PLC-based implementation of reduced RW supervisors

Authors: Murat UZAM | Gökhan GELEN

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 2, pp.394-419

Document Type: Article

Publication Date: 1/2013

Document Language: Turkish

Document ID (Org No.): 2000743341

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Murat UZAM | Gökhan GELEN

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 2, pp.394-419

Document Type:

Article

Publication Date:

1/2013

Document Language:

Turkish

Document ID (Org No.):

2000743341

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632