Topic
Modeling and simulation
About: Modeling and simulation is a research topic. Over the lifetime, 10273 publications have been published within this topic receiving 111550 citations.
Papers published on a yearly basis
Papers
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TL;DR: The performance trend of the diesel engine model developed result of this model based on the theoretical and computational model shows in graphics in the paper.
Abstract: The single cylinder modeling and simulation for four-stroke direct-injection diesel engine requires the use of advanced analysis and development tools to carry out of performance the diesel engine model. The simulation and computational development of modeling for the research use the commercial of GT-SUITE 6.2 software. In this research, the one dimensional modeling of single cylinder for four-stroke direct-injection diesel engine developed. The analysis of the model is combustion performance process in the engine cylinder. The model simulation covers the full engine cycle consisting of intake, compression, power and exhaust. In this model it can to know the diesel engine performance effect with simulation and modeling in any speeds (rpm) parameters. The performance trend of the diesel engine model developed result of this model based on the theoretical and computational model shows in graphics in the paper.
29 citations
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29 Sep 2000TL;DR: In this paper, a computer implemented method for statistical modeling and simulation of the impact of global variation and local mismatch on the performance of integrated circuits, comprises the steps of estimating a representation of component mismatch from device performance measurements in a form suitable for circuit simulation.
Abstract: A computer implemented method for statistical modeling and simulation of the impact of global variation and local mismatch on the performance of integrated circuits, comprises the steps of: estimating a representation of component mismatch from device performance measurements in a form suitable for circuit simulation; reducing the complexity of statistical simulation by performing a first level principal component or principal factor decomposition of global variation, including screening; further reducing the complexity of statistical simulation by performing a second level principal component decomposition including screening for each factor retained in the first level principal component decomposition step to represent local mismatch; and performing statistical simulation with the joint representation of global variation and local mismatch obtained in the second level principal component decomposition step.
29 citations
01 Apr 2003
TL;DR: In this article, the authors quantitatively capture the sensitivity of a MEMS gyroscope to manufacturing variations in the widths of suspension beams and gaps between fingers in electrostatic actuation and capacitive sensing combs.
Abstract: : MEMS gyroscopes are extremely difficult to manufacture reliably. The MEMS gyroscope is sensitive to spurious vibrations and other coupling mechanisms. This thesis aims to quantitatively capture the sensitivity of a MEMS gyroscope to manufacturing variations in the widths of suspension beams and gaps between fingers in electrostatic actuation and capacitive sensing combs. The gyroscope considered is manufactured in a CMOS-MEMS process. The suspended MEMS structures are composed of the multi-layer stack of interconnect metals and dielectrics in a CMOS process. The effect of misalignment is also modeled in the gyroscope. Fundamental issues related to the modeling and simulation of MEMS gyroscopes are addressed. Behavioral simulation is used to analyze the gyroscope and system-level design issues. The elastic modeling effort is primarily aimed at a thorough understanding of cross-axis coupling in micromechanical springs and at multi-dimensional curvature in the multilayer suspended structures in the CMOS-MEMS process. Cross-axis stiffness constants are derived for basic spring topologies. Techniques to reduce, and even completely eliminate, elastic cross-axis coupling are discussed. In the electrostatic domain, a methodology which combines analytical equations with numerically obtained data is developed to model CMOS-MEMS combs. Particular attention is paid in this methodology to make the resultant behavioral model energy conserving. Convergence problems found in behavioral simulations of gyroscopes lead to a detailed comparison of different Analog Hardware Description Language (AHDL) model implementation of mechanical second-order systems. Analytic equations relating gyroscope non-idealities: the Zero Rate Output, acceleration and acceleration-squared sensitivity and cross-axis sensitivity to manufacturing effects are derived. The analysis and simulations result in several insights into gyroscope non-idealities and design pointers to reduce them.
29 citations
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TL;DR: A more general narrowband regular-shaped geometry-based statistical model (RS-GBSM) combined with the line of sight (LoS) and single bounce (SB) rays for unmanned aerial vehicle (UAV) multiple-input multiple-output (MIMO) channel is proposed.
Abstract: A more general narrowband regular-shaped geometry-based statistical model (RS-GBSM) combined with the line of sight (LoS) and single bounce (SB) rays for unmanned aerial vehicle (UAV) multiple-input multiple-output (MIMO) channel is proposed in this paper. The channel characteristics, including space-time correlation function (STCF), Doppler power spectral density (DPSD), level crossing rate (LCR) and average fade duration (AFD), are derived based on the single sphere reference model for a non-isotropic environment. The corresponding sum-of-sinusoids (SoS) simulation models including both the deterministic model and statistical model with finite scatterers are also proposed for practicable implementation. The simulation results illustrate that the simulation models well reproduce the channel characteristics of the single sphere reference model with sufficient simulation scatterers. And the statistical model has a better approximation of the reference model in comparison with the deterministic one when the simulation trials of the stochastic model are sufficient. The effects of the parameters such as flight height, moving direction and Rice factor on the characteristics are also studied.
29 citations
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TL;DR: This paper investigates the application of a polynomial abductive network modeling technique to a class of hydraulic actuation systems used in heavy-duty mobile machines and shows that the computation time is reduced considerably, yet the simulation results show a sufficient degree of predictive accuracy.
29 citations