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In this work, tracking analysis of variable normalized least mean fourth (XE-NLMF) algorithm is carried out in the presence of two sources of nonstationarites: 1) carrier frequency offset between transmitter and receiver and 2) random variations in the environment. A novel approach to this analysis is carried out here using the concept of energy conservation. Close agreement between analytical analysis...
This paper proposes two synthesis methods for controlling power converters. The first one is a stabilizing method in which a unique Lyapunov function is introduced and the second one is a new predictive control approach, which uses model predictive control to track a given optimal stable limit cycle. Moreover, the two methods can include the Discontinuous Conduction Mode (DCM) in the formulation....
The paper proposes an alternative way to solve robust reference tracking problem. Instead of rejecting the effect of the disturbance directly, an intermediate step is built into the state estimation problem. The advantage of the methodology is to elaborate a modified optimal state estimation problem taking the unbiased estimate of the disturbance into account. Henceforward, the solution of the discrete...
This paper proposes an adaptive approach to improve the performance of Target Controlled Infusion (TCI) based strategies. The method determines an adequate drug dose profile that drives the drug effect on the individual patient to a desired target in a prespecified period of time. It combines an optimal variance constrained drug dose design with a hybrid identification of the individual patient dynamics...
It is shown that by means of an appropriate choice of the coefficients of the regulator of the order smaller by one from that of the plant, it is possible to obtain the freely prescribed poles of the discrete-time (DT), closed loop (CL) system. The algorithm of design of the regulator-observer for the DT CL system with output feedback is described. The resulting CL system retains all the poles of...
A novel optimal control algorithm incorporating a cost structure implied by quantity discounts is applied to a differential equation model of an inventory system. Rather than using a demand forecast, this approach is intended to regulate the system in real time in response to inventory variations. Some examples illustrate how the system response is generated and how it is affected by quantity discounts...
In this paper, we consider the problem of computing the steady state solutions of a model of an helicopter, in the particular case in which the center of mass is subject to vertical oscillations. We present preliminary studies of a complete design of an internal model-based controller to achieve automatic smooth landing of helicopters on an oscillating platform. We model the reference signal as the...
In this paper the problems of modeling, simulation and control of marine electrical network systems is addressed. The first goal is to model electrical embedded networks, in a simple but realistic way. A complete model for a one machine network is described. Loads are categorized according to their behavior. The essential problem of keeping output voltage constant during abrupt load commutations is...
The dynamics of population balance systems are described by partial integro-differential equations. In this paper we are interested in the design and analysis of a nonlinear stabilizing control scheme based on Lyapunov design techniques in order to stabilize the steady state of the cell population balance model in a continuous bioreactor by manipulating the dilution rate. In this specific instance,...
The paper presents a joint state and unmeasured input estimation technique for a special class of nonlinear second order macroscopic traffic model. The freeway traffic system is transformed into a quasi and affine approximate Lin- ear Parameter Varying (LPV) form. Observer design technique is formulated using off-line optimization problem subjected to Linear Matrix Inequality (LMI) conditions, considering...
The objective of this paper is to investigate a control method for systems with discrete inputs that have switch related cost. For such systems, the control objective often is a trade off between the deviation from the reference (performance) and the number of switches (weariness, energy efficiency etc.). For such systems a steady state might never be attained, but rather the optimal behavior might...
To operate process plants under restricted condition such as high-quality and reduced cost, Control Performance Assessment (CPA) that assesses performance of the control systems from the operation data has been actively studied in recent years. However, owing to the non-linearity included in the general system plants, it is difficult to tune the control parameters regularly. The scheme to tune PID...
This paper proposes a modular isolated dc-dc converter, based on the input-series and output-series (ISOS) association of the full-bridge PWM (FB-PWM) dc-dc converter with capacitive filter. The main attribute of the proposed architecture is its ability to provide self-balance of the input and output voltage across the individual converters, without voltage loop control scheme, both in the steady...
In this paper, we consider the quasilinear parabolic-elliptic repulsion chemotaxis system with logistic source under homogeneous Neumann boundary condition in a smooth bounded domain. It is proved that the classical solutions to the corresponding initial boundary value problem are uniformly bounded in time.
The most challenging issue in Machine-to-Machine (M2M) last mile wireless access networks is the management of a large number of M2M devices that generate a vast amount of M2M traffic. The communications traffic for various M2M applications or services is classified as Fixed-Scheduling (FS) or Event-Driven (ED). The FS traffic is an operational traffic, which occurs on a periodic basis, such as reports...
The most challenging issue in Smart Grid (SG) communications is the management of a vast amount of SG communications traffic in the wireless access network, which connects power substations to a large number of SG devices. To confront this challenge, electric utilities and telecommunications operators have proposed the use of a hybrid wireless access network, referred to as a hybrid SG network, which...
The envelope-following (EF) simulation of practical DC-DC converters is challenging due to the presence of digital behavior, strong nonlinearity, complex frequency module schemes and feedback loops. This paper presents a novel EF method for time-domain analysis of DC-DC converters based upon a numerically robust time-delayed phase condition to track the envelopes oaf circuit states under a varying...
This paper proposes a new interleaved flyback topology based on hysteretic control. The output current ripple can be reduced with the interleaved structure, and both switches can achieve Zero-voltage-switching (ZVS). Besides, the energy of leakage inductance can be fully recycled, which will improve the efficiency of the converter. The topology is based on hysteresis control, with this control scheme,...
In order to solve the design problem of coupled inductor in multiphase interleaving bidirectional DC/DC convertor, the universal design criterion of coupled inductor with general applicability was proposed. The Buck+Boost interleaving and magnetically integrated bidirectional DC/DC converter was studied under Buck mode with all inductors coupled symmetrically. The universal design criterion of coupled...
This paper presents the accelerated computation of the periodic steady state solutions of a nonlinear controlled microgrid system with multiple distributed generation units, using six Newton methods. The performance of the Newton methods are compared in terms of their numerical properties, computational effort and efficiency in order to know their advantages and disadvantages in the computation of...
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