Modeling Of Static Characteristics Research Articles

AN EFFICIENT NUMERICAL SCHEME FOR STATIC TORQUE PROFILING OF SWITCHED RELUCTANCE MACHINE WITH EXPERIMENTAL VALIDATIO

In AC and DC drives, the use of switched reluctance machine (SRM) is becoming popular as it has a few preferences over AC and DC drives in a simple and robust construction without brushes, low inertia, and high torque to weight ratio, without rotor windings, simple circuit power converter, etc. SRM is widely used in variable speed and servo drives. Because of the double saliency structure and the high nonlinearity of magnetic material, it is difficult to represent the flux-linkage and static torque characteristic of the SRM. This work promotes the use of an improved numerical integration scheme for the static characteristics of SRM. The static torque function that depends on the rotor position and the phase current of the flux linkage features family (for different rotor positions) is improved in the proposed work. Firstly, we use an experimental setup for the electromagnetic characteristic of SRM. Then, we use the improved scheme to develop an efficient mathematical model for static characteristics and finally simulate the static characteristic of SRM through MATLAB code. In the last step, we compare the performance of the proposed integrator model with an existing approach for better efficiency of the static characteristic of SRM with experimental validation.

Thermo-hybrid lubrication FSI-CFD model for the static characteristics of hybrid porous tilting pad bearings

Hybrid porous tilting pad bearing (HPTPB) is a new hybrid lubrication bearing showing potential for oil-free high-speed turbomachinery with reliable stability. This study presents a thermo-hybrid lubrication FSI-CFD model for HPTPB static characteristics. The interaction between the gas lubrication and the adaptive pad motion is solved with dynamic mesh iterative algorithm. The influences of rotor speed, supply pressure, radial stiffness, tilting stiffness, and nominal clearance on the load capacity, mass leakage, friction torque, and temperature rise are investigated. The adaptive pad motions significantly influence the hybrid lubrication of the hydrostatic and hydrodynamic effects in the HPTPB. With the complex bearing configuration, the static performances of HPTPB depend on the combined effect of the design parameters.

A Behavioral Compact Model for Static Characteristics of 3D NAND Flash Memory

We present a behavioral compact model for static characteristics of 3D NAND flash memory for integrated circuits and system-level applications utilizing BSIM-CMG 110.0.0. This model is easy to implement, computationally efficient, fast, accurate, and effectively accounts for the different parasitic capacitance coupling effects applicable to the 3D geometry of the vertical channel Macaroni body charge-trap flash memory. The model parameter extraction methodology is simple and can be extended to reproduce the electrical behavior of different 3D NAND flash memory architectures (with different page size, dimension, or a number of stacked layers). We believe that the developed compact model would equip the circuit designers and system architects with an effective tool for design-exploration of 3D NAND flash memory devices for diverse unconventional analog applications.

空気圧人工筋駆動マニピュレータのモデル化と物体把持制御

Safety is essential as artificial hands have contact with people. We consider a pneumatic drive manipulator that can give flexibility to the structure itself. While pneumatic drive has the advantage of high compliance, it also has disadvantages of low control accuracy and large error. It makes it possible to hold the object in a balanced manner or to handle it manually unconsciously when these features work well. So, we first modeled static characteristic model of pneumatic artificial muscles, and next defined the driving model of the manipulator, and finally considered the potential due to the joint stiffness stored in the manipulator. In this way, we have constructed the equation of motion of manipulators considering flexibility. The effectiveness of modeling is verified by comparing experimental and simulation results. In addition, we confirmed that the manipulator grasps using the flexibility by performing object grasping control.

Static and Dynamic Characteristic Models of Global Solar Radiation Fluctuation in the Scope of Load Frequency Control

SUMMARYPenetration of photovoltaic (PV) generation system into the power system may have some negative effects on stable operations of the power system; for example, on frequency control. Therefore, investigation of the short‐term fluctuations of PV generation is important as a precaution for further PV penetration. Since PV generation is approximately proportional to the incident solar radiation, this paper develops static and dynamic characteristic models for short‐term fluctuations of global solar radiation. The static characteristic model is a set of standard deviations which have been statistically estimated based on past observed data. The dynamic characteristic model consists of autoregressive models which are designed for actually observed time‐sequential short‐term fluctuation data. In both models, the clearness index is used to eliminate seasonal variation of solar radiation. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(2): 10–20, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22469

Static and Dynamic Characteristic Models of Global Solar Radiation Fluctuation in the Scope of Load Frequency Control

SUMMARY Penetration of photovoltaic (PV) generation system into the power system may have some negative effects on stable operations of the power system; for example, on frequency control. Therefore, investigation of the short-term fluctuations of PV generation is important as a precaution for further PV penetration. Since PV generation is approximately proportional to the incident solar radiation, this paper develops static and dynamic characteristic models for short-term fluctuations of global solar radiation. The static characteristic model is a set of standard deviations which have been statistically estimated based on past observed data. The dynamic characteristic model consists of autoregressive models which are designed for actually observed time-sequential short-term fluctuation data. In both models, the clearness index is used to eliminate seasonal variation of solar radiation. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(2): 10–20, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22469

An analytical model for lightly doped drain MOS transistors

An analytical model for static characteristics, including substrate current of lightly doped drain (LDD) MOS transistors, is presented. Major small geometry and second-order effects are included. In addition, source, drain and channel scries resistances are included. The saturation parameters are found by ensuring the continuity of drain current and conductance at the point of saturation. This is an improvement over existing models. The modelled results are shown to be in very good agreement with measured data available in the literature.