1,720,965 research outputs found
A FEA-like Method for Evaluating the Ship Equilibrium Point
No full textThis paper will focus on a method for evaluating the ship equilibrium point via the On Board Stability System (OBSS) module. Starting from the exact 3D geometry of ship hull, described by a discrete model in a standard format, distribution of all weights onboard and data acquired by the system, OBSS calculates the ship floating condition using a FEA-like method (Finite Elements Analysis). Results of this paper represent the joint efforts of the public-private partnership in being between Centro Cultura Innovativa d'Impresa (CCII) of University of Salento, Apphia s.r.l. and Avio S.p.A
A knowledge-based decision support system for shipboard damage control
No full textThe operational complexity of modern ships requires the use of advanced applications, called damage control systems (DCSs), able to assist crew members in the effective handling of dangerous events and accidents. In this article we describe the development of a knowledge-based decision support system (KDSS) integrated within a DCS designed for a national navy. The KDSS uses a hybrid design and runtime knowledge model to assist damage control operators through a kill card function which supports damage identification, action scheduling and system reconfiguration. We report a fire fighting scenario as illustrative application and discuss a preliminary evaluation of benefits allowed by the system in terms of critical performance measures. Our work can support further research aimed to apply expert systems to improve shipboard security and suggest similar applications in other contexts where situational awareness and damage management are crucial. (c) 2012 Elsevier Ltd. All rights reserved
A novel approach for Decision Support System in marine applications
No full textThis paper focuses on the development of a knowledge-based Decision Support System (DSS) or the management of the ship compartment integrated information that comprises real-time devices status and remote command, simple full-navigability on the topology of the ship by CAD drawings, operator actions sharing through Multifunction Console (MFCs), recorded video clip and others. The developed system allows sensible benefits in terms of reduced situational awareness and action time
Integration of CAD tools in damage management system
No full textThis paper focuses on the implementation of an advanced CAD integrated application for shipboard safety control systems. Damage Control Management System (DCMS) is a software module included into the Damage Control System (DCS), developed by the researchers of Apphia s.r.l. and CCII (Centro Cultura Innovativa d’Impresa) of University of Salento
Advanced CAD integrated approach for naval applications
No full textThe work presented in this paper concerns with the implementation of an advanced CAD integrated approach for shipboard damage control systems. The Damage Control Management System (DCMS) is a software module included in the Damage Control System (DCS), developed within the collaboration between CCII (Centro Cultura Innovativa d’Impresa) of University of Salento and Avio S.p.A.
High informative content management in shipboard applications
No full textThis paper focuses on the implementation of a crucial application in naval field, named Damage Control System (DCS), in the development of which the researchers of the Centro Cultura Innovativa d’Impresa (CCII) of University of Salento have been involved by its industrial partner Avio S.p.A.
A Multidisciplinary Approach for On Board Stability System
No full textThe aim of this paper is to present the main results arisen from the joint efforts of the public-private partnership in being between Centro Cultura Innovativa d’Impresa (CCII) of University of Salento and Avio S.p.A. This paper will focus on the results of the core of the On Board Stability System (OBSS) module that, starting from the exact 3D geometry of a ship hull, described by a discrete model in a standard format, the distribution of all weights onboard and the data acquired by the system, calculates ship asset
A Collaborative Engineering Platform for Supporting Design Optimisation of Advanced Aero Engine Sub-Systems
No full textModern engineering design optimization processes require an increasing distribution of
calculation activities between distributed collaborating teams, laboratories, Universities and
companies. The aerospace industry has an increasing need to establish efficient Collaborative
Frameworks between partners with the aim at reducing design redundancies and accelerating the
required design optimization loops, moving the focus from separated centres towards a strongly
connected innovation network. This paper will present an Italian collaborative innovation network
involving Avio S.p.a. and his two university research centres Great Lab and ePaintLab. The
scenario presented is focused on the collaborative network set-up aiming at addressing advanced
multi-disciplinary design optimization strategies supporting next generation of jet engine subsystems
design
Path-Following for the Dynamic Model of a Marine Surface Vessel without Closed-Loop Control of the Surge Speed
No full textThe paper presents a novel path-following solution for the dynamic model of an underactuated marine surface vessel. Assuming the lack of closed loop control over the linear velocities of the vessel, a velocity for a virtual target on the path and a reference angular velocity for the vessel are computed such that if the set target-vehicle had such velocities the path-following problem would be asymptotically solved at kinematic level. Then, applying feedback linearization to the dynamic model of the surface vessel, yaw torque command is computed in order to drive the vessels total velocity on the desired reference values. The resulting control law for the yaw degree of freedom results in nonlinear terms (from feedback linearization) and PI terms. Numerical simulations are provided to validate the proposed approach
A path following controller for the dynamic model of a marine surface vessel
No full textA path following controller for the dynamic model of an underactuated marine vessel is presented. The solution extends previous results relative to the purely kinematics case and is able to cope with constant and known ocean currents. Based on kinematics, a reference linear and angular velocity is computed such that if the vehicle had such velocities the path following problem would be asymptotically solved. Then, applying feedback linearization to the dynamic model of the surface vessel, yaw torque and surge force commands are computed in order to drive the vessels total velocity on the desired reference values. The resulting control laws for the yaw and surge degrees of freedom result in nonlinear terms (from feedback linearization) and PI terms. Numerical simulations are provided to validate the proposed approach
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