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Recently,
the manufacturing systems are getting more competitive due
to the customized production, rapid product change and market
transition. Therefore, we have researches on an event-based
and distributed object-oriented component-based manufacturing
system framework to model and construct the modern manufacturing
systems. A distributed colored timed Petri net (DCTPN) is
developed based on the original Petri net (PN). The structural
properties of DCTPN are also developed. The proposed DCTPN
can model the color-based manufacturing attributes and time-based
properties. In addition, the distributed and modularized
models can be integrated into the desired configuration,
and hence are beneficial to the frequent process reengineering.
The COM (component object model) server place in a DCTPN
is used to model the manufacturing execution system (MES).
Based on the COM server places, the DCTPN models can integrate
not only the shopfloor processes horizontally but also the
MES vertically. The distributed component servers of DCTPN
inference engine, distributed real-time statistical process
control (DSPC) and distributed order release server (DORS)
are developed to demonstrate the proposed manufacturing
system framework. All applications can be handled by the
DTMS to illustrate the capacity of the DCOM-based, distributed
transparent, fault tolerant and load balancing manufacturing
systems. Finally, an IC fabrication manufacturing system
and a reconfigurable cluster tool are modeled using DCTPN.
In the constructed models, equipment and wafer based dispatching
rules are imbedded in the DCTPN components to emulate the
different production polices.
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