TY - GEN
T1 - Petri net modeling and real-time control of dual-arm cluster tools with residency time constraint and activity time variations
AU - NaiQi, Wu
AU - MengChu, Zhou
AU - ShihSen, Peng
AU - Chu, Feng
AU - Chu, Chengbin
PY - 2008
Y1 - 2008
N2 - Because of residency time constraints and activity time variation of cluster tools, it is very difficult to operate them. This paper addresses their real-time control issues. A Petri net (PN) model is developed to model them. This model describes the robot activity sequence with robot waits included. Via this model, to operate a cluster tool is to determine robot wait times and a two-level operation architecture is proposed, which includes an off-line periodic scheduler and real-time controller. By this approach, the system can adapt to random activity time variation. A cluster tool derived as a not-always- schedulable system by the existing methods is shown always-schedulable by using the proposed innovative approach.
AB - Because of residency time constraints and activity time variation of cluster tools, it is very difficult to operate them. This paper addresses their real-time control issues. A Petri net (PN) model is developed to model them. This model describes the robot activity sequence with robot waits included. Via this model, to operate a cluster tool is to determine robot wait times and a two-level operation architecture is proposed, which includes an off-line periodic scheduler and real-time controller. By this approach, the system can adapt to random activity time variation. A cluster tool derived as a not-always- schedulable system by the existing methods is shown always-schedulable by using the proposed innovative approach.
UR - https://www.scopus.com/pages/publications/54949093664
UR - https://www.scopus.com/pages/publications/54949093664#tab=citedBy
U2 - 10.1109/COASE.2008.4626482
DO - 10.1109/COASE.2008.4626482
M3 - Conference contribution
AN - SCOPUS:54949093664
SN - 9781424420230
T3 - 4th IEEE Conference on Automation Science and Engineering, CASE 2008
SP - 109
EP - 114
BT - 4th IEEE Conference on Automation Science and Engineering, CASE 2008
T2 - 4th IEEE Conference on Automation Science and Engineering, CASE 2008
Y2 - 23 August 2008 through 26 August 2008
ER -