DocumentCode :
2667806
Title :
Analysis and feedback control of LonWorks-based network systems for automated manufacturing
Author :
Kim, B.-H. ; Cho, K.-H. ; Park, K.-S.
Author_Institution :
Sch. of Electr. Eng. & Autom., Ulsan Univ., South Korea
Volume :
5
fYear :
2000
fDate :
2000
Firstpage :
3405
Abstract :
As the interest in flexible manufacturing systems and computer integrated manufacturing systems increases, the distribution of centralized control systems using industrial control networks is becoming more interesting. We investigate the rate-based traffic control of industrial control networks to improve the performance regarding the throughput fairness and error rates. Especially, we consider the protocol of LonWorks(TM) which consists of all OSI 7-layers and supports various communication media with low cost. Basically, the proposed rate-based traffic control system is closed loop by utilizing the feedback channel errors, which shows improved performance compared with other industrial control networks commonly operating in an open loop. To do this, an additional network node, called the monitoring node, is introduced to check the channel status without increasing the channel load. The proposed control loop is in effect whenever the feedback channel error becomes greater than an admittable value. We demonstrate the improved performance of the controlled network system in view of throughput and fairness measures by implementing the lab-scale network system and through the experimentation upon it
Keywords :
closed loop systems; controller area networks; distributed control; feedback; industrial control; open systems; protocols; telecommunication traffic; LonWorks; OSI; centralized control systems; closed loop; computer integrated manufacturing systems; distributed control; error rates; feedback channel errors; feedback control; flexible manufacturing systems; industrial control networks; performance; protocol; rate-based traffic control; throughput fairness; Computer integrated manufacturing; Control system analysis; Error correction; Feedback control; Feedback loop; Flexible manufacturing systems; Industrial control; Open loop systems; Throughput; Traffic control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems, Man, and Cybernetics, 2000 IEEE International Conference on
Conference_Location :
Nashville, TN
ISSN :
1062-922X
Print_ISBN :
0-7803-6583-6
Type :
conf
DOI :
10.1109/ICSMC.2000.886534
Filename :
886534
Link To Document :
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