Browsing by Author "Melo, Victoria"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- Alignment of digital twin systems with the RAMI 4.0 model using multi-agent systemsPublication . Melo, Victoria; Prieta Pintado, Fernando De la; Leitão, PauloThe Digital Twin approach has emerged in the Industry 4.0 context to perform the design, virtual commissioning and optimization of processes and machines, considering the simulation model feed with real-time data, and articulated with AI data-driven algorithms to extract value and knowledge. The digital Twin can be seen as a way to proceed with the digitalization of production assets, covering the layers dimension defined by the RAMI 4.0 model. However, a pertinent question is related to understand the relationship between the Digital Twin concept and the other two dimensions of the RAMI 4.0 model, and particularly the way to address the distributed nature exhibited by the hierarchy levels and the life-cycle management defined by the life-cycle value stream dimension. Having this in mind, this paper aims to analyse the coverage of the Digital Twin concept according to the three dimensions of the RAMI 4.0 model, particularly considering the inherent capabilities of Multi-agent Systems to support the development of more distributed and pro-active Digital Twin ecosystems that cover the life-cycle management, facing the demands established by Industry 4.0 compliant solutions.
- An intrusion detection system dataset for a multi-agent cyber-physical conveyor systemPublication . Funchal, Gustavo Silva; Zahid, Farzana; Melo, Victoria; Kuo, Matthew M.Y.; Pedrosa, Tiago; Sinha, Roopak; Prieta Pintado, Fernando De la; Leitão, PauloIndustry 4.0 is built upon the foundation of connecting devices and systems via Internet of Things (IoT) technologies, with Cyber-Physical Systems (CPS) serving as the backbone infrastructure. Although this approach brings numerous benefits like improved performance, responsiveness and reconfigurability, it also introduces security concerns, making devices and systems vulnerable to cyber attacks. There is a need for effective techniques to protect these systems, and the availability of datasets becomes essential to support the development of such techniques. This paper presents a dataset based on the collection of traffic information exchanged in a self-organizing conveyor system using the multi-agent systems (MAS) architecture and containing various intelligent conveyor modules. The dataset comprises data collected at the network and agent levels under normal system operation, denial of service (DoS) attacks, and malicious agent attacks. An intrusion detection system that integrates Fast Fourier Transform (FFT) and Machine Learning (ML) analysis is developed to demonstrate the utility of this dataset.
- Design of an ISO 23247 Compliant Digital Twin for an Automotive Assembly LinePublication . Melo, Victoria; Barbosa, José; Mota, Gonçalo; Prieta Pintado, Fernando De la; Leitão, PauloThe integration of Industry 4.0 (I4.0) technologies is transforming various society sectors, and particularly the manufacturing sector, promoting a digital transformation that fosters smart and interconnected systems. The Digital Twin (DT) acts as a key component in the digital transformation landscape and its integration with I4.0 technologies paves the way for the implementation of Zero Defect Manufacturing strategies. A spotlight on the automotive industry underscores the power of DT applications for real-time defect detection and improvement of product quality and process efficiency. However, the proper DT implementation, contributing to their integration and interoperability, requires the compliance with standards and reference architectures. Having this in mind, this paper describes the design of a DT architecture compliant with the ISO 23247 standard and aligned with the RAMI 4.0 to cover the dimensional measurement process comprising inspection stations placed in the body shop area of an automotive assembly line. This implementation enables the real-time and early identification of defects along the assembly process, allowing to prevent their occurrence at a single stage and their propagation to downstream processes.
- Exploring digital twin dynamics: an analysis of structure configurationsPublication . Melo, Victoria; Barbosa, José; Pires, Flávia; Prieta Pintado, Fernando De la; Leitão, PauloDigital twin (DT) is an important technology to support the realization of the digital transformation, connecting the physical asset to its virtual copy and fostering real-time monitoring, simulation, and decision-support. However, the benefits of DT depend on its intended purpose and application, which is impacted by the design structure configuration that is used for its implementation. This paper discusses the advantages and challenges of considering different organizational structures for the implementation of DTs, namely centralised, hierarchical and decentralised, complemented with a case study that was used to analyse the implementation of DT focusing on centralised and decentralised approaches. Additionally, the paper includes an analysis of the main aspects of DT structures and their design guidelines, the key enabling technologies and the main challenges of distributing DTs.
- IoT-based solution to reduce waste and promote a sustainable farming industryPublication . Stefanuto, Bruno; Funchal, Gustavo Silva; Melo, Victoria; Mendes, Andre C.; Raimundo, Délio; Gouveia, Hélia; Coelho, João Paulo; Leitão, PauloWaste and the necessity to increase sustainability in the farming industry are some of the challenges addressed in the agri-food chain. With the potential of digital technologies, e.g., the Internet of Things (IoT) and Artificial Intelligence, to revolutionize agriculture by enabling more efficient and intelligent monitoring, system architecture and IoT nodes were developed to support relevant parameters for composing a Sustainability Index for the Bio-economy (siBIO). These nodes are scalable, modular, capable of meeting on-demand production needs, and provide a cost-effective alternative to commercial solutions or manual data collection methods. The collected data is transmitted to middleware and then stored, analyzed, and displayed on a user-friendly dashboard, providing data to siBIO and consequently contributing to a more sustainable farming industry and reducing waste of resources and food. The results include the implementation of IoT nodes in a case study involving a vineyard and an apple orchard. The nodes are successfully collecting data on environmental, operational, and energy parameters such as temperature, air humidity, soil moisture, precipitation, and water and electricity consumption for irrigation. The tests of data transmission and collection, functionality and robustness of the proposed solution were promising, offering a way to quantify the sustainability index and facilitate the exchange of agricultural information in a reliable and standardized way.
- Positioning Cyber-Physical Systems and Digital Twins in Industry 4.0Publication . Pires, Flávia; Melo, Victoria; Queiroz, Jonas; Moreira, António Paulo G. M.; Prieta Pintado, Fernando De la; Estevez, Elisabet; Leitão, PauloIndustry 4.0 has brought innovative concepts and technologies that have greatly improved the development of more intelligent, flexible and reconfigurable systems. Two of these concepts, Cyber-Physical Systems (CPSs) and Digital Twins (DTs), have gained significant attention from various stakeholders, e.g., researchers, industry practitioners, and governmental organizations. Both are vital to support the digitalisation of products, machines, and systems, and they focus on the integration of physical and cyber processes, where one affects the other through feedback loops. Having this in mind, this paper aims to better understand how CPS and DT are correlated, particularly exploring their similarities and differences, their positioning within the Industry 4.0 paradigm, and their convergence to develop Industry 4.0 solutions. Some research challenges to develop Industry 4.0 solutions by integrating these concepts are also discussed.