Allocating IEC function blocks for parallel real-time distributed control system
Real-time distributed control systems (RDCSs) have an increasing importance in industrial process. The evolving standard IEC 61499 provides function block (FB) as a suitable metaphor for constructing RDCSs. However, the real-timeliness of such systems has not been well dealt with. From a real-time p...
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| Vydáno v: | 2004 IEEE International Conference on Control Applications Ročník 1; s. 254 - 259 Vol.1 |
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| Hlavní autoři: | , , |
| Médium: | Konferenční příspěvek |
| Jazyk: | angličtina |
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Piscataway NJ
IEEE
2004
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| ISBN: | 9780780386334, 0780386337 |
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| Abstract | Real-time distributed control systems (RDCSs) have an increasing importance in industrial process. The evolving standard IEC 61499 provides function block (FB) as a suitable metaphor for constructing RDCSs. However, the real-timeliness of such systems has not been well dealt with. From a real-time point of view, the FB model defined in IEC 61499 is extended with several timing characteristics. Task graph (TG) is employed to represent FB based RDCS. By exploiting the benefits of parallelism, pipeline scheduling, which can greatly shorten the control period, is utilized for real-time FBs. The problem of allocating FBs to parallel RDCSs subject to periodicity, time, precedence as well as resource constraints is examined. A heuristic algorithm is proposed to further decrease the minimum of control period while meeting these constraints, thus improving the quality of control (QoC). An illustrative example is presented, highlighting the advantages of the proposed method. |
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| AbstractList | Real-time distributed control systems (RDCSs) have an increasing importance in industrial process. The evolving standard IEC 61499 provides function block (FB) as a suitable metaphor for constructing RDCSs. However, the real-timeliness of such systems has not been well dealt with. From a real-time point of view, the FB model defined in IEC 61499 is extended with several timing characteristics. Task graph (TG) is employed to represent FB based RDCS. By exploiting the benefits of parallelism, pipeline scheduling, which can greatly shorten the control period, is utilized for real-time FBs. The problem of allocating FBs to parallel RDCSs subject to periodicity, time, precedence as well as resource constraints is examined. A heuristic algorithm is proposed to further decrease the minimum of control period while meeting these constraints, thus improving the quality of control (QoC). An illustrative example is presented, highlighting the advantages of the proposed method. |
| Author | Feng Xia Youxian Sun Zhi Wang |
| Author_xml | – sequence: 1 surname: Feng Xia fullname: Feng Xia organization: Nat. Lab. of Ind. Control. Technol., Zhejiang Univ., Hangzhou, China – sequence: 2 surname: Zhi Wang fullname: Zhi Wang organization: Nat. Lab. of Ind. Control. Technol., Zhejiang Univ., Hangzhou, China – sequence: 3 surname: Youxian Sun fullname: Youxian Sun organization: Nat. Lab. of Ind. Control. Technol., Zhejiang Univ., Hangzhou, China |
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| Keywords | Function block diagram Periodicity Scheduling Distributed system Real time Modeling Metaphor Pipeline Real function Quality control Heuristic method Distributed control Parallelism Timing |
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| Snippet | Real-time distributed control systems (RDCSs) have an increasing importance in industrial process. The evolving standard IEC 61499 provides function block (FB)... |
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| StartPage | 254 |
| SubjectTerms | Applied sciences Computer science; control theory; systems Control theory. Systems Distributed control Electrical equipment industry Exact sciences and technology Heuristic algorithms IEC standards Industrial control Job shop scheduling Pipelines Real time systems Resource management Timing |
| Title | Allocating IEC function blocks for parallel real-time distributed control system |
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