Sammendrag
This paper presents an object-oriented modeling (OOM) approach to model development
of marine operation systems, specifically the hydraulic systems of marine cranes. Benefited
from the rapid development of computation technology, many modeling and simulation
techniques and software tools have proved to be very useful during the product and
system development process. However, due to the increasing complexity of the physical
systems, many challenges still exist regarding model flexibility, model integration, simulation
accuracy, stability, and efficiency. The goal of introducing OOM to complex
dynamic systems is to provide flexible, effective, and efficient models for different simulation
applications. Previous work presented a virtual prototyping (VP) framework based
on the functional mock-up interface (FMI) standard. The advantage of using FMI cosimulation
is that modeling and simulation of stiff and strongly coupled systems can be
distributed. As a result, the modeling tradeoffs between simulation accuracy and efficiency
can be evaluated. The essential features of OOM and its application within
dynamic operation system domain are highlighted through a case study. These features
include model causality, model encapsulation, and inheritance that facilitate the decomposition
and coupling of complex system models for co-simulation. The simulation results
based on the proposed VP framework showed speedups in the computation efficiency at
the cost of moderate accuracy loss.
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