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Modeling and Control of Co-generation Power Plants: A Hybrid System Approach

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Modifier-adaptation methodology for real-time optimization

Alejandro Gabriel Marchetti

The process industries are characterized by a large number of continuously operating plants, for which optimal operation is of economic importance. However, optimal operation is particularly difficult to achieve when the process model used in the optimizat ...

EPFL2009

Demand Driven Employee Scheduling for Retail Outlets

Colin Neil Jones

This paper studies the problem of demand driven employee scheduling for direct-sales retail outlets. The demand for sales personnel during each half hour is predicted a week in advance based on previous recorded data and the problem of computing an optimal ...

2009

Predictive Optimal Management Method for the control of polygeneration systems

François Maréchal

A predictive optimal control system for micro-cogeneration in domestic applications has been developed. This system aims at integrating stochastic inhabitant behavior and meteorological conditions as well as modeling imprecisions, while deﬁning operation s ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2008

Transient Behavior of variable speed pump-turbine units

François Avellan, Jean-Jacques Simond, Christophe Nicolet, Basile Kawkabani, Yves Pannatier, Alexander Schwery

This paper presents the modeling, simulation and analysis of the dynamic behavior of a fictitious 2x320 MW variable speed pump-turbine power plant including hydraulic system, electrical installations, rotating inertias and control systems. First, the model ...

International Association For Hydraulic Research2008

Preemptive open shop scheduling with multiprocessors: polynomial cases and applications

Dominique de Werra

This paper addresses a multiprocessor generalization of the preemptive open-shop scheduling problem. The set of processors is partitioned into two groups and the operations of the jobs may require either single processors in either group or simultaneously ...

2008

One-dimensional analysis of full load draft tube surge

François Avellan, Mohamed Farhat, Christophe Nicolet

A previous report by the present authors [1] clarified the diffuser effect of the draft tube and the effects of swirl in the runner downstream on the hydraulic instabilities in power generation plants. The present study was intended to study the effect of ...

International Association For Hydraulic Research2008

Dynamics of torque control continuously variable transmissions

Robert Fuchs

With the increasing concerns in the impact of automotive emissions of CO2 and NOx on the environment combined with today's speculation on oil crude supply, the need to find solutions reducing the fuel consumption and emission of tomorrow's cars is more tha ...

EPFL2006

Design and Control of an Indoor Coaxial Helicopter

Roland Siegwart, Gilles Caprari

This paper presents the design and preliminary control of an indoor coaxial helicopter �CoaX� based on a concept of hybrid active and passive control. The robot is capable of passive roll and pitch stabilization against small disturbances while a ...

2006

Optimal Control for Real-Time Feedback Rate-Monotonic Schedulers

Giancarlo Ferrari Trecate

This paper presents an optimal control scheme for a real-time feedback control rate-monotonic scheduling (FC-RMS) system. We consider two-version tasks composed of a mandatory and an optional part to be scheduled according to the FC-RMS. In FC-RMS, the con ...

Springer-Verlag2005

Modeling and Control of Co-generation Power Plants: A Hybrid System Approach

Giancarlo Ferrari Trecate

In this paper the short term scheduling optimization of a combined cycle power plant is accomplished by exploiting hybrid systems, i.e. systems evolving according to continuous dynamics, discrete dynamics, and logic rules. Discrete features of a power plan ...

2004