Robust Supervisory Control for Product Routings With Multiple Unreliable Resources

• Published in: IEEE transactions on automation science and engineering Vol. 6; no. 1; pp. 195 - 200
• Main Authors: Song Foh Chew, Shengyong Wang, Lawley, M.A.
• Format: Journal Article
• Language: English
• Published: Piscataway, NJ IEEE 01.01.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Allocations; Applied sciences; Automation; Blocking; Buffers; Centralized control; CIM; Computer science; control theory; systems; Control system analysis; Control systems; Control theory. Systems; Controllers; Deadlock avoidance; Exact sciences and technology; Failure; fault tolerance; flexible manufacturing systems; Modelling and identification; Production systems; Resource management; Robust control; robust supervisory control; Robustness; Routing; Subspace constraints; Supervisors; Supervisory control; Workstations; Production system; Pneumatic measurement; robust supervisory control; Resource allocation; flexible manufacturing systems; Routing; Computer control; Buffer system; Modeling; Hierarchized structure; Robust control; Prevention; Workstation; Fault tolerance; Deadlock avoidance; Flexible manufacturing system; Logic control; Programmable logical controller; Supervision
• ISSN: 1545-5955; 1558-3783
• DOI: 10.1109/TASE.2008.917142

Manufacturing systems are often subject to resource failure. In past work, we developed ldquorobustrdquo supervisory controllers for the single-unit resource allocation model. These guarantee that if any subset of resources fail, parts in the system requiring failed resources do not block the production of parts not requiring failed resources. To establish supervisor correctness, we assumed that each part type required at most one unreliable resource in its route. We now relax this assumption using a central buffer and present supervisors that guarantee robust operation without assumptions on route structure.