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194 results on '"Pugi, L."'

8. A Thermo-Hydraulic Tool for Automatic Virtual Hazop Evaluation

Author

Pugi L., Conti R., Rindi A., and Rossin S.

Subjects
RT code prototyping, lube oil console, Rotating machine HazOp analysis, transient behaviour analysis, Plant-Control System interaction, Technology
Abstract

Development of complex lubrication systems in the Oil&Gas industry has reached high levels of competitiveness in terms of requested performances and reliability. In particular, the use of HazOp (acronym of Hazard and Operability) analysis represents a decisive factor to evaluate safety and reliability of plants. The HazOp analysis is a structured and systematic examination of a planned or existing operation in order to identify and evaluate problems that may represent risks to personnel or equipment. In particular, P&ID schemes (acronym of Piping and Instrument Diagram according to regulation in force ISO 14617) are used to evaluate the design of the plant in order to increase its safety and reliability in different operating conditions. The use of a simulation tool can drastically increase speed, efficiency and reliability of the design process. In this work, a tool, called TTH lib (acronym of Transient Thermal Hydraulic Library) for the 1-D simulation of thermal hydraulic plants is presented. The proposed tool is applied to the analysis of safety relevant components of compressor and pumping units, such as lubrication circuits. Opposed to the known commercial products, TTH lib has been customized in order to ease simulation of complex interactions with digital logic components and plant controllers including their sensors and measurement systems. In particular, the proposed tool is optimized for fixed step execution and fast prototyping of Real Time code both for testing and production purposes. TTH lib can be used as a standard SimScape-Simulink library of components optimized and specifically designed in accordance with the P&ID definitions. Finally, an automatic code generation procedure has been developed, so TTH simulation models can be directly assembled from the P&ID schemes and technical documentation including detailed informations of sensor and measurement system.

Published
2014
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25. Development and Testing of the Propulsion System of MARTA AUV

Author

Allotta, B., Riccardo Costanzi, Gelli, J., Paolucci, L., Pugi, L., and Ridolfi, A.

Subjects
Finite element method, Marine engineering, Propulsion Systems, Autonomous Underwater Vehicles, Marine Robotics, Marine Propulsion, Propulsion Systems, Autonomous Underwater Vehicles, Marine Robotics, Marine Propulsion, Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits [Àrees temàtiques de la UPC]
Abstract

This work deals with the design of the propulsion system of a modular AUV (Autonomous Underwater Vehicle). The authors describe the design methodologies and the testing devices used for the fast prototyping of MARTA (MARine Tool for Archaeology) AUV actuation system, including drivers, motors and propellers. In particular, the authors introduce the design criteria followed for the preliminary testing activities and the methodologies adopted for fast testing and prototyping of the proposed solutions. This is a quite important topic considering the high customization and the reliability required by this kind of applications.

Published
2015

38. The THESAURUS Project: AUV software design

Author

Allotta, B., Bartolini, F., Costanzi, Riccardo, Gelli, J., Monni, N., Natalini, M., Pugi, L., Ridolfi, A., and Vettori, G.

Subjects
mechatronics, Autonomous Underwater Vehicle, Unmanned and Underwater Vehicles, Marine Robotics, Underwater Robotics
Published
2013

45. The thesaurus project, a long range auv for extended exploration, surveillance and monitoring of archaeological sites

Author

Allotta, B., Pugi, L., Bartolini, F., Costanzi, R., Alessandro Ridolfi, Monni, N., Gelli, J., Vettori, G., Gualdesi, L., and Natalini, M.

Subjects
Finite element method, Underwater Robotics, Mechatronics, Propulsion Systems, Marine engineering, Autonomous Underwater Vehicle, Design Optimization, Swarm Control and Navigation, Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits [Àrees temàtiques de la UPC]
Abstract

Within the framework of the Thesaurus project (Italian acronym for “TecnicHe per l’Esplorazione Sottomarina Archeologica mediante l’Utilizzo di Robot aUtonomi in Sciami”), the authors have developed a low cost, multirole Autonomous Underwater Vehicle, briefly called Tifone, whose design is the main topic of this paper. According to the expected performances and specifications, the vehicle has to maintain a good autonomy and efficiency, typical features of an AUV (Autonomous Underwater Vehicle), also maintaining high manoeuvrability and hovering capabilities, which are instead more common on ROVs (Remotely Operated Vehicles).Cooperative exploration and surveillance tasks involve the use of swarms of vehicles; the control, the mutual localization and communications among vehicles are fundamental tasks to be optimized. In particular, the optimization of costs with respect to benefits plays a critical role, considering that within the Thesaurus project a first fleet of three vehicles has to be developed. This work mainly deals with the different design phases of the vehicle and with the results of preliminary simulations and tests performed in the MDM laboratories, before the next lake (Roffia basin, between Pisa and Florence, Italy) and sea testing activities (Elba Island, Italy) that will be performed in spring and summer 2013.

Published
2013

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