502
M. Matsuda et al.
required. Therefore, e-cataloging of equipment models for injection molding lines
is more complicated. Trial implementation of e-catalogues for the above equipment
has been executed for construction of a virtual injection molding line. On this virtual
injection molding line, an environmental performance simulation in terms of electrical energy consumption simulation can be performed. Because this virtual line
is structured by equipment agents which are generated from selected equipment ecatalogues, it can simulate environmental performance with various views such as
from an equipment level, a production line level and a factory level.
Keywords Equipment modeling · Behavior modeling · Cyber physical production
system · Virtual equipment · Multi agent system
35.1 Introduction
For a forecast of productivity and manufacturability, simulation systems have been
used. As a simulation execution field, a virtual production line which is called a digital
factory is constructed (Freedman 1999; Bley and Franke 2004). A digital factory
involves the modelling of an actual factory (Kuehn 2006; Gregor et al. 2009). A virtual
production line in the digital factory is constructed by virtual equipment which is a
set of models of actual equipment on the actual production line. A virtual equipment
can be implemented as software such as a software agent. A virtual production line
can be constructed as a multi-agent system (Monostori et al. 2006). A digital factory
is the basis of CPPS (Cyber-Physical Production System) (Monostori 2014).
A digital eco-factory has been proposed by the authors for a simulation of environmental performance in addition to productivity and manufacturability (Matsuda et al.
2012; Matsuda and Kimura 2012, 2013, 2015). A digital eco-factory is constructed
as a multi-agent system. An environmental performance simulation strongly requires
to model dynamic behavior of the equipment. On the other hand, it is difficult for
users of a production simulation system such as a production system designer and
an operator to write a software program of agents. Thus, it was proposed that a user
constructs a virtual production line by selecting an adequate equipment model from a
repository. These equipment models are called e-catalogue of equipment. A preliminary study for a PCA (Printed Circuit Assembly) line had been done, according to
the above concept. E-catalogues of equipment are implemented and a trial construction of a virtual PCA line and simulations of electrical energy consumption has been
executed (Matsuda et al. 2015, 2016).
The above concept is newly applied to the construction of a digital eco-factory
for injection molding. The connection of equipment to construct a virtual line is
not a sequential connection like a PCA. In the virtual injection molding line, more
complicated interaction and control among equipment agents are required. Therefore,
e-cataloging of equipment models for injection molding lines is more complicated.
Trial implementation of e-catalogues for the above equipment has been executed for
M. Matsuda et al.
required. Therefore, e-cataloging of equipment models for injection molding lines
is more complicated. Trial implementation of e-catalogues for the above equipment
has been executed for construction of a virtual injection molding line. On this virtual
injection molding line, an environmental performance simulation in terms of electrical energy consumption simulation can be performed. Because this virtual line
is structured by equipment agents which are generated from selected equipment ecatalogues, it can simulate environmental performance with various views such as
from an equipment level, a production line level and a factory level.
Keywords Equipment modeling · Behavior modeling · Cyber physical production
system · Virtual equipment · Multi agent system
35.1 Introduction
For a forecast of productivity and manufacturability, simulation systems have been
used. As a simulation execution field, a virtual production line which is called a digital
factory is constructed (Freedman 1999; Bley and Franke 2004). A digital factory
involves the modelling of an actual factory (Kuehn 2006; Gregor et al. 2009). A virtual
production line in the digital factory is constructed by virtual equipment which is a
set of models of actual equipment on the actual production line. A virtual equipment
can be implemented as software such as a software agent. A virtual production line
can be constructed as a multi-agent system (Monostori et al. 2006). A digital factory
is the basis of CPPS (Cyber-Physical Production System) (Monostori 2014).
A digital eco-factory has been proposed by the authors for a simulation of environmental performance in addition to productivity and manufacturability (Matsuda et al.
2012; Matsuda and Kimura 2012, 2013, 2015). A digital eco-factory is constructed
as a multi-agent system. An environmental performance simulation strongly requires
to model dynamic behavior of the equipment. On the other hand, it is difficult for
users of a production simulation system such as a production system designer and
an operator to write a software program of agents. Thus, it was proposed that a user
constructs a virtual production line by selecting an adequate equipment model from a
repository. These equipment models are called e-catalogue of equipment. A preliminary study for a PCA (Printed Circuit Assembly) line had been done, according to
the above concept. E-catalogues of equipment are implemented and a trial construction of a virtual PCA line and simulations of electrical energy consumption has been
executed (Matsuda et al. 2015, 2016).
The above concept is newly applied to the construction of a digital eco-factory
for injection molding. The connection of equipment to construct a virtual line is
not a sequential connection like a PCA. In the virtual injection molding line, more
complicated interaction and control among equipment agents are required. Therefore,
e-cataloging of equipment models for injection molding lines is more complicated.
Trial implementation of e-catalogues for the above equipment has been executed for