An approach to obtain a PLC program from a DEVS model
HT Park, KY Seong, S Dangol… - … and Control-Theory …, 2009 - books.google.com
HT Park, KY Seong, S Dangol, GN Wang, SC Park
Automation and Control-Theory and Practice, 2009•books.google.comTo survive and prosper in the modern manufacturing era, a manufacturing company should
be capable of adapting reduced life cycle of products in a continuously changing market
place. Simulation is a useful tool for manufacturers to adapt this kind of rapidly changing
market to design and analyze complex systems that are difficult to model analytically or
mathematically (Choi, 2000). Manufacturers who are using simulation can reduce time to
reach stable state of automated manufacturing process by utilizing statistics, finding …
be capable of adapting reduced life cycle of products in a continuously changing market
place. Simulation is a useful tool for manufacturers to adapt this kind of rapidly changing
market to design and analyze complex systems that are difficult to model analytically or
mathematically (Choi, 2000). Manufacturers who are using simulation can reduce time to
reach stable state of automated manufacturing process by utilizing statistics, finding …
To survive and prosper in the modern manufacturing era, a manufacturing company should be capable of adapting reduced life cycle of products in a continuously changing market place. Simulation is a useful tool for manufacturers to adapt this kind of rapidly changing market to design and analyze complex systems that are difficult to model analytically or mathematically (Choi, 2000). Manufacturers who are using simulation can reduce time to reach stable state of automated manufacturing process by utilizing statistics, finding bottlenecks, pointing out scheduling error etc. For the simulation of manufacturing systems, manufacturers have been using various simulation languages, simulation software for example ARENA, AutoMod. Most of traditional simulation languages and softwares focus on the representation of independent entity flows between processes; their method is commonly referenced to as a transaction-oriented approach. In this paper, we propose an object-oriented approach that is based on the set of object classes capable of modeling a behavior of existing system components.
The object-oriented modeling (OOM) is a modeling paradigm, that uses real world objects for modeling and builds language independent design organized around those objects (Rumbaugh, 1991). Even though OOM has been widely known to be an effective method for modeling complicated software systems, very few researchers tried to apply the OOM to design and simulate manufacturing system software models. Based on the OOM paradigm, different researchers have proposed various modeling approaches despite the fact that they express them in different ways with different notations. For example, Choi et al. presented the JR-net framework for modeling which is based on the OOM paradigm of Rumbaugh et al., which is made of three sub-models (an object model, functional model, and dynamic model). Chen and Lu proposed an object-oriented modeling methodology to model production systems in terms of the Petri-nets, the entity relationship diagram (ERD) and the IDEF0 (Chen, 1994). Virtual factory (VF) is also very important concept to be considered in today’s simulation environment. By using the OOM paradigm, VF concept can be implemented efficiently (Onosato, 1993).
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