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In this communication the use of AR modelling in the estimation of cubic phase coupling is studied. After obtaining the trispectrum of an harmonic signal with cubic phase couplings, the parametric modelling is used to design a method that models this trispectrum and allows the locatation of the cubic couplings. This method is based on a twofold AR modelling of the data using their fourth-order cumulants,...
Vibrations in dynamical structures, as those encountered for instance in mechanical, aerospace or civil engineering, are often caused by internal or external excitations. One way to attenuate vibrations that can be undesirable for safety or other reasons is by the use of active control systems. This means to use feedback controllers driving actuators at appropriate locations between the structure...
When several high voltage direct current (HVDC) systems simultaneously recover after severe faults, absorbing large amounts of reactive power from the receiving AC systems, presents new challenges for the transient voltage stability of multi-infeed HVDC (MIDC) systems. Actually DC power recovery characteristics could be controllable to some extent by selecting voltage dependant current order limiter...
In this paper we extend the agglomerative hierarchical kernel spectral clustering (AH-KSC [1]) technique from networks to datasets and images. The kernel spectral clustering (KSC) technique builds a clustering model in a primal-dual optimization framework. The dual solution leads to an eigen-decomposition. The clustering model consists of kernel evaluations, projections onto the eigenvectors and a...
Exploiting of the nanostructure arrays as a promising candidate for excitation of neural cells has been analyzed. Based on the importance of the coupling effect between electrode and neuron, a multiphyscis modeling approach has been proposed. The model incorporates theoretically both structural effects (size, geometry) and electrophysiological effects. The system of equations for proposed model has...
In this work we investigate the effect of diffusive voltage and current couplings between natural pacemaker oscillators in the heterogeneous coupled oscillator model of ECG signals. We study the synchronization behavior of the oscillator system for normal and fast cardiac sinus rhythms and reproduce different mode-locked cases which correspond to known incomplete atrioventricular blocks. The obtained...
Linking multiple data collections to create longitudinal data is an important research problem with multiple applications. Longitudinal data allows analysts to perform studies that would be unfeasible otherwise. In our research we are interested in linking historical census collections to create longitudinal data that would allow tracking people overtime. The goal of the linking is to identify the...
In this study, we investigate synchronization phenomena in coupled polygonal oscillatory networks with strong frustrations. We focus on the amplitude of each oscillator when the coupling strength is increased. By using the computer simulations, we confirm that the amplitude of the oscillators decreases by increasing the coupling strength and oscillation death frustrated oscillators is occurred. Furthermore,...
In this paper, a method for MIMO system identification with unknown, but bounded measurement errors is presented, extending a recently published method for systems with only one output. It is based on an interval description of the sampled measurement data of linear, time invariant systems, where the intervals cover the unknown, but bounded errors, and yields a discrete-time model description with...
This paper presents a study on parallel coupling operation of multiple pumps. It is known that it is always better to couple pumps with identical characteristics, although practical situations are never ideal, therefore we have taken into consideration the situation where we have available just pumps with different characteristics. A mathematical model has been realized and a Matlab simulation scheme...
This paper presents an improved position-sensorless field-oriented control strategy for a surface-mount permanent magnet synchronous motor (PMSM). In this algorithm, a high-pass filter (HPF) has been applied to the rotor flux estimation to solve the DC drift or offset problem caused by the integration part. The rotor position and speed signal extraction is achieved by mean of a phase-lock loop (PLL)...
This paper presents an FPGA-based real-time simulation system of a nonlinear permanent magnet synchronous machine and its qualification for power hardware-in-the-loop emulation systems. The machine model considers the magnetic anisotropy of the rotor, the saturation of the iron as well as dynamic cross-coupling effects between the direct- and quadrature axis of the machine. A specifically designed...
Compliant micro-positioning mechanisms play an important role in precise positioning and displacement technology. In this paper, a new kind of compliant mechanism based on Roberts mechanisms is proposed for the mechanism design of a novel parallel-kinematic XY micro-positioning stage. Pseudo-rigid-body model (PRBM) is developed to establish the quantitative models, which show that the XY stage has...
This paper proposes a new control scheme for a class of multi-input dc-dc power converters. The new control method is based on coupling the signals from independent control loops of conventional controller for a multi-port converter. In this paper, the non-restricted double input buck converter is introduced. The properties of this converter and its steady-state equations along with its small-signal...
This paper proposes a combined parameter estimation for permanent magnet synchronous machines (PMSMs), by which the rotor permanent magnet (PM) flux linkage and mechanical parameters such as the combined moment of inertia and viscous friction coefficient are estimated without the aid from nominal machine parameter values. The proposed estimation of rotor PM flux linkage is based on the addition of...
This contribution deals with the analysis of the Transmission-Line Holder measurement system for determination of shielding effectiveness for material samples. Two different material sample configurations will be analysed, material sample with conductive and non conductive surface. In this part, the TLH with capacitive and galvanic coupling will be analysed. This TLH is called TEM-2000. Analysis will...
This paper presents a low rank compression technique which is used together with reluctance method and Schur complement to accelerate the performance of a PEEC-based solver. The system of linear equations which is achieved from the PEEC method is normally dense, therefore the coefficient matrix (MNA matrix) is sparsified using reluctance technique, and then Schur complement is applied on the MNA matrix...
In this article, the PWB(Power Balance) method and BLT(Baum-Liu-Tesche) Equation are combined to analyze the small PCB structure inside an electrically large cavity. Practically, the electrically large cavity has a disadvantage in evaluating the field inside the cavity precisely because of multiple reflection and resonance phenomena. In addition, it needs much time-consumption to carry out the field...
This paper deals with the analytical description of an interior permanent magnet synchronous motor running in six-step conduction mode. It assumes a non-sinusoidal back emf, but inductances vary sinusoidally with the rotor position. The proposed model renounces Park's transformation and delivers a set of equations which allow the numerical simulation of phase currents and torque in the abc reference...
Intermediate couplers have been shown to increase the coupling from primary to secondary pads in inductive power transfer (IPT) systems. This paper investigates embedding a co-planar intermediate coupler coil, with the primary coil inside the primary pad, to boost coupling to the secondary pad given there have been recent works indicating this will have similar benefits. Several coil designs are simulated...
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