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 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.
Yi-Min Deng, Aibing Yu, Weihua Li and Di Zheng
H. L. Cai et al., "A Scheduling Algorithms of DNC Systems Based on CAN and Program Expending Rate", Applied Mechanics and Materials, Vols. 37-38, pp. 46-49, 2010