A distributed algorithm is presented to solve the economic power dispatch with transmission line losses and generator constraints. The proposed approach based on two consensus algorithms running in parallel. first a first-order protocol modified by correction term which uses local estimation of system mismatch ensure generation-demand equality. second performs using strategy called most up-to-date information. can handle networks different size topology information about number nodes also...

Modern production facilities (i.e. flexible manufacturing systems) exhibit a high degree of resource sharing, situation in which deadlocks (circular waits) can arise. Using digraph theoretic concepts we derive necessary and sufficient conditions for deadlock occurrence rigorously characterize highly undesirable situations (second level deadlocks), inevitably evolve to circular waits the next future. We assume that system dynamics is described by discrete event dynamical model, whose state...

This paper presents a distributed algorithm based on auction techniques and consensus protocols to solve the nonconvex economic dispatch problem. The optimization problem of includes several constraints such as valve-point loading effect, multiple fuel option, prohibited operating zones. Each generating unit locally evaluates quantities used bids in mechanism. These units send their neighbors communication graph that supports power system which provides required information flow. A procedure...

Large penetration of electric vehicles (EVs) can have a negative impact on the power grid, e.g., increased peak load and losses, that be largely mitigated using coordinated charging strategies. In addition to shifting process night valley when electricity price is lower, this paper explicitly considers EV owner convenience mainly characterized by desired state charge at departure time. To end, procedure defined as an uninterruptible happens given discrete rate formulated scheduling problem....

Direct drives with linear motors have been recently attracting the attention of both industry and academia. The main peculiarity these systems is lack mechanical reduction transmission devices, which makes influence some uncertain electromechanical phenomena (e.g., friction, cogging forces, etc.) load disturbances much more significant than in case conventional rotary actuators. This paper describes a control system for tubular synchronous motor based on sliding-mode (SMC)...

This paper develops a model-based control strategy for bistable positioning system based on dielectric elastomer. The motion is generated by the electrostatic compressive force between two compliant electrodes applied surface of membrane connected to spring that acts as biasing element and significantly extends possible stroke. Such design choice, however, makes strongly nonlinear unstable in open-loop. Starting from extension dynamic model developed simpler version actuator, this proposes...

This paper describes an intelligent optical sensor for real time defect detection in gas metal arc welding processes. The measures the radiations emitted by plasma surrounding arc, and analyzes information to determine index of local quality weld. data processing algorithm encompasses a Kalman filter reduce heavy amount noise affecting measured signals, fuzzy system assess degree acceptability is also able detect risk specific problems (e.g., anomalies current, voltage or speed contamination...

This paper proposes an approach to deal with the control of a class dynamical systems affected by hysteresis, which is particularly common in applications smart materials motion control. The controlled plant assumed be combination linear system hysteretic operator that can appear either series or feedback path respect component, while controller defined as tracking error, its integral and derivatives. mainly focuses on behavior constant references, formulates output regulation problem...

Abstract Linear discrete-time positive systems arise in various fields of science, such as economic modelling, behavioural stochastic processes, etc. Recently, some authors have examined the problem controllability for single-input case. This paper provides necessary and sufficient conditions characterizing properties multi-input systems. The results here developed show that only a narrow class these enjoys reachability controllability.

This paper considers a control strategy for systems affected by time-varying hysteretic phenomena, such as those observed in magnetic shape memory alloys subject to temperature variations. The proposed controller is based on scheme that combines feedforward cancellation of the hysteresis using modified Prandtl-Ishlinskii inverse model with closed-loop law designed address errors. Both and feature adjustable parameters are adapted online means learning laws Lyapunov design tools....

In this paper, we present a decision support tool to optimize two of the most critical activities in intermodal railroad container terminals, an iterative and integrated framework devoted terminal profit improvement. First, model allows optimizing freight trains composition, maximizing company profit, while respecting physical economic constraints, placing train head/tail containers prosecuting subsequent destinations. Hence, based on resulting system allocation storage yard, order maximize...

Flexible manufacturing systems (FMSs) are modern production facilities with easy adaptability to variable plans and goals. These may exhibit deadlock situations occurring when a circular wait arises because each piece in set requires resource currently held by another job the same set. Several authors have proposed different policies control allocation order avoid problems. approaches mainly based on some formal models of systems, such as Petri nets (PNs), directed graphs, etc. Since they...

In this paper, we describe an evolutionary design procedure for discrete-time anti-windup controller electrical drives. Using a genetic algorithm devised to test and compare controllers of different orders, search the discrete achieving optimal compromise weighted cost performance indices. The is performed on-line, on physical hardware, by continuously downloading testing new solutions microprocessor running control algorithms in real time. obtained through significantly outperforms...

In many manufacturing environments, automated guided vehicles are used to move the processed materials between various pickup and delivery points. The assignment of unit loads is a complex problem that often solved in real-time with simple dispatching rules. This paper proposes an approach based on computational intelligence. We adopt fuzzy multicriteria decision strategy simultaneously take into account multiple aspects every decision. Since typical short-term view rules one main...

This paper uses a novel discrete-event controller (DEC) for the coordination of cooperating heterogeneous wireless sensor networks (WSNs) containing both unattended ground sensors (UGSs) and mobile robots. The DEC sequences most suitable tasks each agent assigns resources according to current perception environment. A matrix formulation makes this particularly useful WSN, where missions change agents may be added or fail. WSN have peculiarities that complicate their supervisory control....

This paper proposes a hybrid approach for the design of adaptive fuzzy controllers (FCs) in which two learning algorithms with different characteristics are merged together to obtain an improved method. The combines genetic algorithm (GA), devised optimize all configuration parameters FC, including number membership functions and rules, Lyapunov-based adaptation law performing local tuning output singletons controller, guaranteeing stability each new controller investigated by GA....

Abstract-This paper considers the problem of decentralized task assignment in a network heterogeneous robots. We introduce new algorithm named robots consensus-based allocation (HRCA), which can be viewed as possible extension recently proposed bundle (CBBA) for homogeneous robot networks. The HRCA is based on two stage procedure. In first stage, similarly to CBBA, an initial market-based decision strategies and local communication determined, disregarding constraints maximum number tasks...

A distributed approach for the economic dispatch of generating units is presented. It assumed that generators are connected by a communication graph. Each unit has information about itself, and can exchange only with few neighboring in such Using graph theory consensus algorithms, proposed solves problem manner instead existing centralized approaches. The solution shown to be optimal, independent initial power distribution, respond automatically real-time load demand changes. Moreover, it...

Potentially, flexible manufacturing systems (FMSs) possess the ability to attain efficiency and versatility in small batches, variable mix production. However, FMS potentiality is not yet fully used, because of high cost specific control software. Hence, a generic software, usable an arbitrary FMS, producing part mix, appears as important means minimize programming re-programming effort. In this context, modeling problem formalization emerge main issue. paper authors refer Zeigler's...