Modular representation of complex hybrid systems: application to the simulation of batch processes

Thevenon, Luc; Flaus, Jean‐Marie

doi:10.1016/s0928-4869(00)00020-3

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…By using a modular approach, it is possible to simplify the description, qualitative (properties and invariants) and quantitative (mean production cycle, WIP, etc.) analysis of a complicated system by splitting its complexity into small and simple entities that can also be considered and analysed independently of each other [35] and to overcome problems relative to the systems behaviour (e.g., some conflicts types) [36]. In addition, modular representation enables the reuse of the specified models and even the implementation of algorithms for automatic model synthesis with respect to system features [17].…”

Section: Model Synthesis and Operation Proceduresmentioning

confidence: 99%

A Discrete Process Modelling and Simulation Methodology for Industrial Systems within the Concept of Digital Twins

2022

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A generic well-defined methodology for the construction and operation of dynamic process models of discrete industrial systems following a number of well-defined steps is introduced. The sequence of steps for the application of the method as well as the necessary inputs, conditions, constraints and the results obtained are defined. The proposed methodology covers the classical offline modelling and simulation applications as well as their online counterpart, which use the physical system in the context of digital twins, with extensive data exchange and interaction with sensors, actuators and tools from other scientific fields as analytics and optimisation. The implemented process models can be used for what-if analysis, comparative evaluation of alternative scenarios and for the calculation of key performance indicators describing the behaviour of the physical systems under given conditions as well as for online monitoring, management and adjustment of the physical industrial system operations with respect to given rules and targets. An application of the proposed methodology in a discrete industrial system is presented, and interesting conclusions arise and are discussed. Finally, the open issues, limitations and future extensions of the research are considered.

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Section: Model Synthesis and Operation Proceduresmentioning

confidence: 99%

A Discrete Process Modelling and Simulation Methodology for Industrial Systems within the Concept of Digital Twins

2022

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“…This section introduces a unit model of describing the assembly block by combining a unit block with the unit process, as shown in Figure 5. The unit model is a fundamental modular model that can represent modular representation and the analysis of complex processes and is a key model that expresses a process-based formal description [36][37][38].…”

Section: Process Definitionmentioning

confidence: 99%

A Process-Based Modeling Method for Describing Production Processes of Ship Block Assembly Planning

et al. 2020

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Ship block assembly planning is very complex due to the various activities and characteristics of ship production. Therefore, competitiveness in the shipbuilding industry depends on how well a company operates its ship block assembly plan. Many shipbuilders are implementing various studies to improve their competitiveness in ship block assembly planning, specifically regarding technology usage, such as modeling and simulation (M&S) and Cyber-Physical Systems (CPS). Although these technologies are successfully applied in some production planning systems, it is difficult to tailor ship production planning systems with flexibility due to unexpected situations. Providing a flexible plan for these production planning systems requires a way to describe and review the organic relationships of ship production processes. In this research, a process-based modeling (PBM) method proposes a novel approach to describing the production process of ship block assembly planning by redefining production information based on changing instructions. The proposed method consists of four modeling steps. The first creates a unit model, which includes the products, processes, and resource information for the block. The second designs an integrated network process for linking unit models according to the bill of materials (BOM). The third creates a process-based model that describes the production processes by combining unit models. The fourth generates a simulation model by applying a Petri-net to the process-based model, which analyzes the productivity of the ship’s block assembly processes. PBM identifies the assembly process’ interrelationship and shows that productivity can be reviewed to uncover ship production problems.

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“…It represents a trajectory in the marking space. According to the approach considered for computing the instantaneous firing speed vector, many models have been proposed [9] . Here, only the constant speed continuous Petri net is considered.…”

Section: Physical Object Subnetmentioning

confidence: 99%

Modeling of photolithography process in semiconductor wafer fabrication systems using extended hybrid Petri nets

Zhou

Pan

Wang

et al. 2007

J Cent. South Univ. Technol.

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To describe a semiconductor wafer fabrication flow availably, a new modeling method of extended hybrid Petri nets (EHPNs) was proposed. To model the discrete part and continuous part of a complex photolithography process, hybrid Petri nets (HPNs) were introduced. To cope with the complexity of a photolithography process, object-oriented methods such as encapsulation and classifications were integrated with HPN models. EHPN definitions were presented on the basis of HPN models and object-oriented methods. Object-oriented hybrid Petri subnet models were developed for each typical physical object and an EHPN modeling procedure steps were structured. To demonstrate the feasibility and validity of the proposed modeling method, a real wafer photolithography case was used to illustrate the modeling procedure. The modeling results indicate that the EHPNs can deal with the dynamic modeling of a complex photolithography process effectively.

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Modular representation of complex hybrid systems: application to the simulation of batch processes

Cited by 12 publications

References 10 publications

A Discrete Process Modelling and Simulation Methodology for Industrial Systems within the Concept of Digital Twins

A Discrete Process Modelling and Simulation Methodology for Industrial Systems within the Concept of Digital Twins

A Process-Based Modeling Method for Describing Production Processes of Ship Block Assembly Planning

Modeling of photolithography process in semiconductor wafer fabrication systems using extended hybrid Petri nets

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