The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The mathematical model was presented for the servo loading system with secondary regulation. Control performance under the disturbance of hydraulic and mechanical coupling was simulated with MATLAB. Simulation reveals that increasing of load pressure, output torque and rotational speed may deteriorate control precision. Load pressure fluctuation causes more influence on torque control system than...
To achieve the dimensional synthesis of planar four-bar linkages, it established the numerical atlases of coupler rotation-angle operator harmonic characteristic parameters and coupler rotation-angle function's harmonic components firstly. It achieved the basic dimension type of linkages and the mathematical model of coupler path based on complex-vector theory secondly, then acquired the formula of...
This paper presents a modified particle swarm optimization (MPSO) algorithm to design an optimal multi input multi out (MIMO) fuzzy logic controller for a cement mill process. The membership function, rule base and the scaling factor of the multi input multi output FLC is tuned for optimal control performance using MPSO by minimizing the Integral absolute error for minimum and maximum operating setpoints...
We applied the theory of the coupled modes to determine the coupling coefficients of the propagated modes in a Grating fiber based on the calculation of their propagation constants while applying the finite -cladding hypothesis of the modal approach method.
One of the crucial tasks in many inference problems is the extraction of an underlying sparse graphical model from a given number of high-dimensional measurements. In machine learning, this is frequently achieved using, as a penalty term, the Lp norm of the model parameters, with p ?? 1 for efficient dilution. Here we propose a statistical-mechanics analysis of the problem in the setting of perceptron...
There are several reasons for circuit modeling of quantum systems: the first is to establish a bridge between quantum and classical worlds, inasmuch this is possible, the second is to provide a unified view of quantum systems interacting with a macroscopic environment on the point of view of observations done on the latter, the third is the possibility of using circuit simulators to describe the performance...
In this paper, enhancement of coupling and transport of energy in two 2-dimensional plasmonic waveguides, with finite and infinite number of nanoparticles, are investigated. Furthermore, the effect of edges on highly field localization and coupling between plasmons are studied.
This paper presents a rigorous numerical approach to the assessment of electro-thermal instabilities arising in high-power semiconductor devices operating under time-periodic conditions. The methodology is entirely developed in the frequency domain with reference to the harmonic balance technique, i.e. no time-domain calculations are required for the determination of the Floquet multipliers exploited...
This paper treats a rat-race circuit with loose coupling using parallel ring-lines. The minimum coupling factor of a conventional rat-race circuit is limited by the highest impedance of ring-lines that can be manufactured. The proposed rat-race circuits with parallel ring-lines can be realized couplers with loose coupling factors of less than -10 dB by reducing the difference between two admittances...
An electromagnetic topology model used to analyse the High Power Microwave (HPM) effect on the different electrical components is presented. The model, whose foundation is linear coupling of aperture, emphasizes on the basic concept of electromagnetic topology, the abstract in the system analysis and two parameters: the polarization of electric field and the frequency of HPM. The algorithm of graph...
The sliding transformer is the central part of the contactless inductive power transfer system that can realize the safe supply for mobile devices. The mathematical model of the sliding transformer is set up according to the coupling-circuit method. The compensation topologies and resonant frequency of the transfer system are analyzed contrastively, and the simulation experiment results are given...
This paper propose a control project using adaptive feedback linearization on the AC servo system. Theory derivation and computer simulation proved that the project can implement robust control of parameters and has the actual application value.
This paper presents the operational principles, design and transient analysis of a new three-phase 12/14-pole doubly salient electrical magnet (DSEM) generator for its application in direct-driven wind power generation. Design equations, finite element and dynamic analysis of the new generator are described. The 12/14-pole DSEM generator with constant self-inductance has lower voltage ripple compared...
The active and reactive components of the power winding current were controlled by the control winding current, which could make power winding current only providing active current component, and the power winding supplying the dynamic torque. The exciting field for the power winding was completely provided by the control winding. On the basis of dq-rotating reference frame of brushless doubly-fed...
A synchrodrive scheme for dual linear motors position servo system in gantry moving type milling machine is presented in this paper. The feedforward control, disturbance observer and electrical cross coupled control algorithm based on fuzzy PID are applied to the position servo system to counteract the influence of mechanical coupling rapidly, and then meet dynamic synchronized performance in machining...
This paper proposes a mathematic nonlinear model of phase flux linkage in terms of Fourier series expression and a phase torque model based on adaptive neural fuzzy inference system (ANFIS) to a 6/4 switched reluctance motor(SRM). The novel model for SRM and the switched reluctance drive system based on Matlab/simulink is developed. The various control strategies, such as the chopped current control...
This paper presents the dynamic modeling, prediction, control and experimental aspects of a switched reluctance starter/generator (SRS/G) system. The proposed model utilizes the Fourier series in expression of current dependent arctangent function to characterize the relationship among phase current, rotor position, flux linkage and torque characteristics. Second, a simulation model along with their...
After introduced several common hybrid systems, the article gives out a new hybrid system typology which uses a dual rotor machine as an electrical variable transmission. The article briefly introduces the basic working principles of the machine, then analysis the mathematical model of a novel machine in the outer rotor synchronous reference frame, it gives out the equivalent circuit as well. According...
Most dynamic characteristics analyses of magnetic bearing are based on the simplified mathematic model neglecting the non-linear electromagnetic relationship between the stator and rotor. This paper presents a detailed analysis and experimental study on the dynamic characteristics of magnetic bearings for a high speed permanent magnet motor. The analysis based on field-circuit coupling method can...
This paper presents a modified direct power control (DPC) strategy for a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid-voltage conditions. The strategy is based on the investigation of the mathematic model and the composition of the instantaneous active and reactive power outputted by DFIG. It is found that, by applying a notch filter of two times of...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.