نتایج جستجو برای: dynamic transient method

تعداد نتایج: 2077649  

Journal: :IEEE Trans. Contr. Sys. Techn. 1998
Mooncheol Won Seibum Choi J. Karl Hedrick

This paper treats air-to-fuel ratio control of a spark ignition engine. A direct adaptive control method using Gaussian neural networks is developed to compensate transient fueling dynamics and the measurement bias of mass air flow rate into the manifold. The transient fueling compensation method is coupled with a dynamic sliding mode control technique that governs fueling rate when the throttl...

2007
Howard Read Andrzej Strojwas Shigetaka Kumashiro

The transient simulation of multiple semiconductor devices is critical in the analysis of dynamic effects such as latch-up. During transient simulation, a large system of coupled nonlinear partial differential equations (PDE) must be solved with considerable effort. In this paper, we present a method of decomposing the spatial domain of silicon (containing one or more devices) into smaller subd...

Journal: :journal of oil, gas and petrochemical technology 0
kambiz razminia department of petroleum engineering, petroleum university of technology, ahwaz, iran abolhassan razminia dynamical systems & control (dsc) research lab., electrical engineering department, school of engineering, persian gulf university, p. o. box 75169, bushehr, iran zohrab dastkhan national iranian oil co., ahwaz, iran

this paper presents analytical solutions and simulations for pressure transient behavior of the partially penetrating wells (ppws). the newman’s product method was adopted to develop the basic instantaneous source functions which characterize the response of ppws. these results were obtained based on the solution of fully penetrating wells (fpws) and they were presented in laplace domain. furth...

Journal: :journal of computational applied mechanics 0
rahmatollah ghajar mechanical properties research lab (mprl), faculty of mechanical engineering, k.n. toosi univeristy of technology, iran mahmood shokrieh composites research laboratory, center of excellence in experimental solid mechanics and dynamics, school of mechanical engineering, iran university of science and technology, iran ali r shajari mechanical properties research lab (mprl), faculty of mechanical engineering, k.n. toosi univeristy of technology, iran

in this study, the analysis of transient thermoelastic response of a functionally graded (fg) non-axisymmetric viscoelastic cylinder is presented. the material properties are assumed to be time- dependent and radially and circumferentially non-homogeneous. the finite element (fe) formulations of the thermoelastic problem are obtained using the virtual work method and all the coupling terms are ...

2017
Ming Li Wei Cheng Jiangpan Chen Ruili Xie Xiongfei Li

Due to the increasing influence of human engineering activities, it is important to monitor the transient disturbance during the evolution process of landslide. For this purpose, a high-performance piezoelectric sensor is presented in this paper. To adapt the high static and dynamic stress environment in slope engineering, two key techniques, namely, the self-structure pressure distribution met...

H.R Mirdamadi M Ghayour, M Jabbari

This paper presents a finite element formulation for the dynamics analysis of the steady and transient states of a nonlinear piezoelectric beam. A piezoelectric beam with damping is studied under harmonic excitation. A numerical method is used for this analysis. In the paper, the central difference formula of four order is used and compared with the central difference formula of two order in th...

2004
Palaniappan Ramu Samy Missoum Raphael T. Haftka

Nonlinear problems such as transient dynamic problems exhibit structural responses that can be discontinuous due to numerous bifurcations. This hinders gradient-based or response surface-based optimization. This paper proposes a novel approach to split the design space into regions where the response is continuous. This makes traditional optimization viable. A convex hull approach is adopted to...

There is a great resolution calling for smart grids in recent years. Introduction of new technologies, that make the network flexible and controllable, is a main part of smart grid concept and a key factor to its success. Transmission network as a part of system network has drawn less attention. Transmission switching as a transmission service can release us from load shedding and remove the co...

پایان نامه :0 1392

it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...

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