Person:
Esteban San Román, Segundo

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First Name
Segundo
Last Name
Esteban San Román
URI
https://hdl.handle.net/20.500.14352/78662
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Informática
Department
Arquitectura de Computadores y Automática
Area
Arquitectura y Tecnología de Computadores
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2003 - 20053
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Author: Andrés Toro, Bonifacio de × End date: 2021 ×

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Now showing 1 - 3 of 3
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    Distributed electronic system for monitoring and control of a fast ship physical model
    (IECON'03: The 29th Annual Conference of the IEEE Industrial Electronics Society, vols 1 - 3, Proceedings, 2003) Girón Sierra, José María; Esteban San Román, Segundo; Recas Piorno, Joaquín; Andrés Toro, Bonifacio de; Besada Portas, Eva; Cruz García, Jesús Manuel de la
    This paper is related with a research on vertical motion alleviation of fast ferries. A scaled down replica of a fast ferry was built, for experimental studies in a towing tank facility. Some submerged moving actuators were added to the replica: a pair of transom flaps, lateral fins and a T-foil near the bow. Two series of experiments with waves generated in a large basin must be done. One of the series is devoted to modelling, and the second for model-based control studies. Due to the fast motions of the experimental ship, it is not possible to attach it to a computerized carriage with instrumentation (it is part of the towing tank facility). Instead, the experimental ship must be autonomous, with all monitoring and control systems on board. Since there are six motions of the ship to be considered, the number of on-board sensors and actuators, and the complexity of control, take us to decide the design of a distributed electronic system. It is based on a central embedded PC, several microcomputer nodes, and the CANbus. The on board system interacts, using a wireless data link, with an off-shore experiment control and data processing system, with an interesting visualization performance. The purpose of the paper is to introduce this system and the associated experimental framework.
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    Development of a control-oriented model of the vertical motions of a fast ferry
    (Journal of Ship Research, 2004) Esteban San Román, Segundo; Girón Sierra, José María; Andrés Toro, Bonifacio de; Cruz García, Jesús Manuel de la
    As a main part of a research study on the control of active flaps and a T-foil of a high-speed ferry, a control-oriented model of vertical motions of the ship has been developed. The objective of the control is to improve comfort, decreasing the impact of heave and pitch motions. We have experimental data from a towing tank institution and simulations with PRECAL. The model is based on a decomposition of the physic phenomena into two main aspects: the coupling of the ship with distance between waves and the dynamics of a semisubmerged mass. The model can be handled with MATLAB-SIMULINK, which is useful for studying control strategies. The model shows good agreement (model validation) with the experimental and simulated data for regular and irregular waves. The article shows a methodology, based on MATLAB tools, for obtaining control-oriented models from computer-aided design (CAD)-based programs. That means that the control-oriented model can be derived from the ship design, even before the ship is built.
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    Fast ships models for seakeeping improvement studies using flaps and T-foil
    (Mathematical and Computer Modelling, 2005) Esteban San Román, Segundo; Girón Sierra, José María; Andrés Toro, Bonifacio de; Cruz García, Jesús Manuel de la; Riola, M.
    Fast ships are taking a relevant role with a clear interest for military purposes. Fast sea transportation encounters several problems to be solved. This article refers to the difficulties originated by brisk vertical motions. The waves encountered by fast ships induce such vertical motions, and this has negative effects: navigation risks, sea sickness, structural damages, and load displacement. It is also interesting for military uses to stabilize the ship when an aircraft is landing or when precision firing is required. By means of submerged actuators, it is possible to alleviate vertical motions. In this research, a pair of transom flaps and a T-foil near the bow are used to counteract the waves. These actuators must move with the maximum efficiency, taking into account the dynamical characteristics of the ship. As a consequence, there is a problem of automatic control design. To carry out this design, it is important to obtain mathematical models of all the aspects involved in the problem: the ship, the waves, the actuators, and the effect on crew and comfort. The aim of this paper is to present the development of these models and the use of them for problem analysis and control design.