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30th International Conference on Ocean, Offshore and Arctic Engineering

作者： Ormberg, Harald Passano, Elizabeth Luxcey, Neil MARINTEK Norwegian Marine Technol Res Inst NO-7450 Trondheim Norway

ISBN: (纸本)9780791844373

This paper describes the extension of a well proven state-of-the-art simulation tool for coupled floating structures to accommodate offshore wind turbine applications, both floating and fixed. All structural parts, i.e. rotor blades, hub, nacelle, tower, vessel and mooring system, are included in the finite element model of the complete system. The aerodynamic formulation is based on the blade element momentum theory. A control algorithm is used for regulation of blade pitch angle and electrical torque. The system response is calculated by nonlinear time domain analysis. This approach ensures dynamic equilibrium every time step and gives a proper time domain interaction between the blade dynamics, the mooring dynamics and the tower motions. The developed computer code provides a tool for efficient analysis of motions, support forces and power generation potential, as influenced by waves, wind, and current. Some key results from simulations with wind and wave loading are presented in the paper. The results are compared with results obtained with a rigid blade model and quasi-static model of the anchor lines. The modelled wind turbine is the NREL offshore 5-MW baseline wind turbine, specifications of which are publicly available. In the accompanying paper, Global Analysis of a Floating Wind Turbine Using an Aero-Hydro-Elastic Numerical Model. Part 2: Benchmark Study, results from the new analysis tool are benchmarked against results from other analysis tools.

关键词： Floating wind turbines Wind Blades Torque Ocean engineering Waves Time-domain analysis Equilibrium (Physics) Vessels control algorithms Simulation Computers Dynamics (Mechanics) Momentum Mooring Wind turbines Finite element model Floating structures Energy generation Computer simulation Offshore wind turbines Rotors

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Optimal oral drug dosing via application of the contraction mapping theorem

Optimal oral drug dosing via application of the contraction ...

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7th Symposium on Modelling and control in Biomedical Systems

作者： Evans, Neil D. Univ Warwick Sch Engn Coventry CV4 7AL W Midlands England

The problem of determining an oral dose, or schedule of oral doses, that gives rise to an arbitrary area-under-curve or to points on the time-series for a variable of interest in a drug kinetics model is considered. These two measures are considered as surrogates for the particular drug response to the dose. The approach taken is to formulate the problem as a fixed point one to which a version of the contraction mapping theorem can be applied. The results, illustrated for a model for the anti-cancer agent topotecan, demonstrate the applicability of the approach. (C) 2010 Elsevier Ltd. All rights reserved.

关键词： Optimization problems Biomedical control Biomedical systems control applications control algorithms

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Hyper-automaton: a model of control algorithms

Hyper-automaton: a model of control algorithms

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IEEE International Siberian Conference on control and Communications

作者： Zyubin, Vladimir E. RAS Inst Automat & Electrometry SB Task Force Linguist Means Appl Programming Novosibirsk 630090 Russia

ISBN: (纸本)9781424403462

The hyper-automation is introduced as a model of complex control algorithms. The model reflects basic aspects of control algorithms: presence of an external environment, cyclic and event-driven functioning, synchronism, hierarchical structure and logical parallelism. The paper introduces basic definitions and conceptual means of hyper-automaton model, which encourage program implementation of the algorithms. A new kind of functional polymorphism we name event-driven polymorphism is distinguished and discussed.

关键词： hyper-automaton control algorithms modeling event-driven polymorphism

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Internal Model controller tuning using the Virtual Reference Approach with Robust Stability

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IFAC Proceedings Volumes 2011年第1期44卷 10237-10242页

作者： José David Rojas Ramón Vilanova Departament de Telecomunicació i Enginyeria de Sistemes Universitat Autònoma de Barcelona 08193 Bellaterra Barcelona Spain

Abstract In this paper a data-driven methodology based on the Virtual Reference Feedback Tuning is presented for the tuning of Internal Model controllers. A data based test is presented to check the robust stability of the controller in the loop, taking advantage of the control structure. Two different examples are shown where the presented method successfully controls a non-minimum phase discrete time plant and a non-linear continuous time process.

关键词： control algorithms data-driven control internal model control virtual reference feedback tuning

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A Comparative study of robotic gas source localization algorithms in industrial environments

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IFAC Proceedings Volumes 2011年第1期44卷 899-904页

作者： Erik Persson David A. Anisi Department for Strategic R&D for Oil Gas & Petrochemicals Process Automation Division ABB Oslo Norway

Abstract Gas source localization is the concept of locating the source of a chemical substance spreading in the environment. Within the oil, gas and petrochemical industry, there is an extreme focus on health, safety and environment (HSE) issues. Hence, being able to locate the source of a gas leakage in an accurate, reliable and quick manner, is of greatest interest to the industry. Although robotic gas source localization has been an active field of research for over fifteen years, large scale real world applications are still lacking. Towards closing this gap, this work presents the results of a comparative study between five different algorithms for robotic gas source localization. The first three are taken from the literature, while the last two are novel modifications and combinations of them. In addition to describing these algorithms, this paper presents the details of the conducted comparative study and the the results thereof.

关键词： Industrial robots Gas source localization Autonomous mobile robots control algorithms

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Multi-Platform controller Interface for SCADA Application

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IFAC Proceedings Volumes 2011年第1期44卷 7885-7890页

作者： José Duarte Luís Rato Paulo Shirley Manuel Rijo Departamento de Informática – Universidade de Évora Rua Romão Ramalho 59 7000-671 Évora Portugal DCeT – Universidade Aberta Rua Fernão Lopes 9 1° Esq. 1000-132 Lisboa Portugal NuHCC – Núcleo de Hidráulica e Controlo de Canais – Universidade de Évora – Pólo da Mitra Apartado 94 7002-554 Évora Portugal

Abstract This paper concerns the development of a SCADA-controller Interface (SCI) application for an open-channel experimental facility. Water delivery canals are complex and spatially distributed systems. The proposed application is to be applied to test control algorithms developed by several research groups with different technical approaches. The proposed interface allows the development of controllers in different environments – C/C++, MATLAB/Simulink, and GNU Prolog – and may be easily extended to other environments. The experimental facilities with the used instrumented canal, the programmable logic controller (PLC) network and the SCADA system are also described in this paper. Finally, some software experimental results are presented.

关键词： Multi-platform Data acquisition control algorithms Efficiency enhancement Real-time communication Supervisory control

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Evaluation of Suppression Methods Used for Reduction of Vibrations of the Active Composite Beam

Evaluation of Suppression Methods Used for Reduction of Vibr...

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2011 International Conference on Frontiers in Computer Education(ICFCE 2011)

作者： Wojciech Jarzyna Micha? Augustyniak Jerzy Warmiński Marcin Bocheński Electrical Drive Systems and Electrical Machines Department Lublin University of Technology Induster Sp.z o.o.Lublin Poland Ph D student of Lublin Univ.of Technology Department of Applied Mechanics Lublin University of Technology

The paper describes methods for suppressing vibrations of a cantilever beamA piezoelectric Macro Fiber Composite(MFC) embedded on a surface of the beam is used as an actuatorThe performance of P and PD controllers, resonance filters PPF and SRF, as well as Nonlinear Saturation controllers(NSC) were evaluatedThe results demonstrated that P and NSC controllers were the most effective of these algorithmsThe relevant tests were carried out using a set-up controlled by a DSP board supported by a PC system.

关键词： Suppression of beam vibrations control algorithms resonant filters NSC controller piezoelectric active actuator MFC

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Semi-active continuous control of base-excited structures: An exploratory study

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STRUCTURAL control & HEALTH MONITORING 2010年第5期17卷 563-589页

作者： Renzi, Emanuele De Angelis, Maurizio Univ Roma La Sapienza Dept Struct & Geotech Engn I-00186 Rome Italy Consiglio Super Lavori Pubbl STC Minist Infrastrutture & Trasporti Rome Italy

The semi-active (SA) control techniques appear a realistic way to adopt active control in structural engineering. This paper reports an exploratory study on SA continuous control, where the mechanical parameters of the devices may continuously assume any value between the given limits. First, a Lyapounov-based control strategy for SA continuous control is proposed and studied for base-excited structures. The obtained continuous control process is initially applied to a seismic-excited single-DOF structure with a variable stiffness device, in order to study the dynamics of the controlled system and the optimal configuration of the algorithm. Successively, the optimized control strategy is applied to single-DOF structures with more realistic SA elasto-plastic devices, and the performances of SA continuous control are compared with the ones of passive and SA ON-OFF control cases. Finally, the obtained results are verified and confirmed in the application to a 4-storey Multi-DOF-framed structure, equipped with continuously variable SA magnetorheological dampers. The study shows the applicability and the possible advantages of the proposed control case, also in comparison with passive and SA ON-OFF cases. Generally it may be stated that the best performances in terms of structural displacements may be obtained by using ON-OFF SA control. Differently, continuous SA control significantly reduces the absolute accelerations and the total forces transmitted to the structures. Copyright (C) 2009 John Wiley & Sons, Ltd.

关键词： semi-active control continuous and ON-OFF control optimization base-excited structures structural vibrations control algorithms

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SEMI-ACTIVE SUSPENSION SYSTEMS FOR HEAVY-DUTY VEHICLES: MULTIBODY MODEL DEVELOPMENT, IDENTIFICATION AND control ALGORITHM EVALUATION

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ASME International Mechanical Engineering Congress and Exposition

作者： Grott, Matteo Biral, Francesco Oboe, Roberto Cis, Alberto Vincenti, Eugenio Univ Trent Dept Mech & Struct Engn I-38050 Trento TN Italy

ISBN: (纸本)9780791843833

The design of suspension systems for heavy-duty vehicles covers a specific field of automotive industry During the past few years there has been an increasing demand in power capabilities, loads and driving speeds of heavy duty vehicles. Therefore, off-highway vehicle manufacturers have shown their interest in employing new technologies. This work focuses on the investigation of hydro-pneumatic suspension systems for heavy duty vehicles, in particular on the benefits of a semi-active solution compared to a passive one. The main targets of this activity is the study of the dynamical behaviour of agricultural tractors and the design of a cost-effective controllable suspension, capable to adapt the tractor dynamical behaviour, under different road and load conditions. The work started with the development of a multibody model of the suspension test bench to be used for control solution comparisons. The multibody model was experimentally validated by characterizing the cylinder friction, tire parameters and Frequency Response (F.R.) of the suspension bench test equipped with a passive solution. As a last step the evaluation of different control algorithms for hydraulic semi-active suspension was carried out via Adams/Matlab co-simulation technique.

关键词： Cylinders control algorithms Matlab Simulation Model development Tires Vehicles Suspension systems Highways Construction equipment Design Friction Roads Automotive industry Stress Frequency response

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ON FAST DYNAMIC PROGRAMMING FOR POWER SPLITTING control OF PLUG-IN HYBRID ELECTRIC VEHICLES

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2nd Annual Dynamic Systems and control Conference (DSCC 2009)/Bath/ASME Symposium on Fluid Power and Motion control

作者： Bin, Y. Reama, A. Cela, A. Natowicz, R. Abderrahmane, H. Li, Y. Paris E Univ ESIEE Paris Dept Embeded Syst F-93162 Noisy Le Grand France

ISBN: (纸本)9780791848920

A Fast Dynamic Programming (FDP) algorithm is proposed to optimize the fuel consumption of the Plug-in Hybrid Electronic Vehicles (PHEV) over a prescribed driving cycle. Firstly, an innovative DP mathematical model for PHEV with reduced dimension is created. It composes of a linear state transfer equation and a quadratic cost function with 1 x 1 dimension. Based on this model, two algorithms expressed as the simple analytic forms are derived. One is the control algorithm for the optimal power splitting ratio (PSR) between the internal combustion engine (ICE) power and demand power Another is the recursive algorithm to calculate the optimization value of the fuel consumption. Then, the optimal output power of ICE (or electronic motor (END) and the optimal speed ratio of the gear position can be calculated rapidly as the consequence of using the algorithms with analytic forms. Finally, the simulation results confirm that the computational efficiency of the FDP control algorithm has been improved with a geometric ratio, while its control performance maintains in an acceptable range in contrast with conventional DP control algorithm.

关键词： Fuel consumption control algorithms Engines algorithms Motors Simulation results Dimensions Vehicles Optimization Dynamic programming Gears Internal combustion engines Cycles Hybrid electric vehicles

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