A Scheduling Algorithms of DNC Systems Based on CAN and Program Expending Rate

In order to avoid communication conflicts in DNC systems, the scheduling tactics adopting a modified guaranteed EDF algorithm to DNC systems’ numerical control (NC) programs transmission was proposed. A condition was given to guarantee all NC machines in DNC systems work continuously. A mathematic m...

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Published in:Applied Mechanics and Materials Vol. 37-38; pp. 46 - 49
Main Authors: Li, Zong Gang, Cai, Hui Lin, Ren, En En
Format: Journal Article
Language:English
Published: Zurich Trans Tech Publications Ltd 01.11.2010
Subjects:
DNC
Dynamic Scheduling Algorithm
Program Expending Rate
CAN Bus
ISBN:0878492224, 9780878492220
ISSN:1660-9336, 1662-7482, 1662-7482
Online Access:Get full text
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Abstract In order to avoid communication conflicts in DNC systems, the scheduling tactics adopting a modified guaranteed EDF algorithm to DNC systems’ numerical control (NC) programs transmission was proposed. A condition was given to guarantee all NC machines in DNC systems work continuously. A mathematic model based on the actual expending rate of NC program was established to decide the priority of NC program transformation of all NC machines. A constraint condition for two machines with neighbored priority was proposed to avoid the conflict in the scheduling times. A dynamic scheduling scheme was presented for DNC systems. The validity of the presented method is verified by the practical tests.
AbstractList In order to avoid communication conflicts in DNC systems, the scheduling tactics adopting a modified guaranteed EDF algorithm to DNC systems’ numerical control (NC) programs transmission was proposed. A condition was given to guarantee all NC machines in DNC systems work continuously. A mathematic model based on the actual expending rate of NC program was established to decide the priority of NC program transformation of all NC machines. A constraint condition for two machines with neighbored priority was proposed to avoid the conflict in the scheduling times. A dynamic scheduling scheme was presented for DNC systems. The validity of the presented method is verified by the practical tests.
Author Li, Zong Gang
Ren, En En
Cai, Hui Lin
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Cites_doi 10.1080/00207549608904938
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Keywords DNC
Dynamic Scheduling Algorithm
Program Expending Rate
CAN Bus
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Snippet In order to avoid communication conflicts in DNC systems, the scheduling tactics adopting a modified guaranteed EDF algorithm to DNC systems’ numerical control...
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