A Reduced Model Approximation Approach Using Model Updating Methodologies

2012 ◽  
pp. 625-636 ◽  
Author(s):  
Tim Marinone ◽  
Adam Butland ◽  
Peter Avitabile
Keyword(s):  
Model Updating ◽  
Reduced Model ◽  
Model Approximation ◽  
Approximation Approach

Reduced Model Approximation Approach Using Model Updating Methodologies

2018 ◽  
Vol 144 (3) ◽  
pp. 04018005 ◽  
Author(s):  
Timothy Marinone ◽  
Tina Dardeno ◽  
Peter Avitabile
Keyword(s):  
Model Updating ◽  
Reduced Model ◽  
Model Approximation ◽  
Approximation Approach

Resilient model approximation for Markov jump time-delay systems via reduced model with hierarchical Markov chains

2015 ◽  
Vol 47 (14) ◽  
pp. 3496-3507 ◽  
Author(s):  
Yanzheng Zhu ◽  
Lixian Zhang ◽  
Victor Sreeram ◽  
Wafa Shammakh ◽  
Bashir Ahmad
Keyword(s):  
Time Delay ◽  
Markov Chains ◽  
Delay Systems ◽  
Reduced Model ◽  
Time Delay Systems ◽  
Model Approximation ◽  
Markov Jump ◽  
Jump Time

Analysis of vibrational spectra of phenylphosphine, diphenylphosphine and their chloro derivatives. Overlay technique calculation of their force field in the reduced model approximation

1981 ◽  
Vol 46 (10) ◽  
pp. 2289-2300
Author(s):  
Soňa Bergrová-Přádná
Keyword(s):  
Force Field ◽  
Benzene Ring ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Reduced Model ◽  
Normal Coordinate ◽  
Model Approximation ◽  
Overlay Technique ◽  
Chloro Derivatives

A normal coordinate analysis using the "reduced model" of benzene ring was carried out with (C6H5)nPX3-n (n = 1, 2; X = H, Cl) compounds. 46 wavenumbers of vibrational transitions of the phenyl- and phosphine group were determined by means of the overlay technique. The transferability of force constants used in this calculation is discussed and an improved assignment of vibrations in the phenyl and phosphine group, based on PED calculations is presented.

The Time Course of Situation Model Updating

2008 ◽  
Author(s):  
W. Matthew Collins ◽  
Keith Rayner
Keyword(s):  
Time Course ◽  
Model Updating ◽  
Situation Model

Reduced model error analysis “application to synchronous machines"

1994 ◽  
Vol 4 (10) ◽  
pp. 1999-2012 ◽  
Author(s):  
Nabil Derbel ◽  
Mohamed B.A. Kamoun ◽  
Michel Poloujadoff
Keyword(s):  
Error Analysis ◽  
Model Error ◽  
Synchronous Machines ◽  
Reduced Model ◽  
Analysis Application

REDUCED MODEL OF PLASMA DISCHARGE CONTROL IN TOKAMAK WITH IRON CORE

2020 ◽  
Vol 7 (3) ◽  
pp. 11-22
Author(s):  
VALERY ANDREEV ◽  
◽  
ALEXANDER POPOV
Keyword(s):  
Optimal Control ◽  
Inverse Problem ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Nonlinear Behavior ◽  
Plasma Discharge ◽  
Reduced Model ◽  
Iron Core ◽  
Power Sources ◽  
Real Power

A reduced model has been developed to describe the time evolution of a discharge in an iron core tokamak, taking into account the nonlinear behavior of the ferromagnetic during the discharge. The calculation of the discharge scenario and program regime in the tokamak is formulated as an inverse problem - the optimal control problem. The methods for solving the problem are compared and the analysis of the correctness and stability of the control problem is carried out. A model of “quasi-optimal” control is proposed, which allows one to take into account real power sources. The discharge scenarios are calculated for the T-15 tokamak with an iron core.

Representation of bolted joints in a structure using finite element modelling and model updating

2020 ◽  
Vol 14 (3) ◽  
pp. 7141-7151 ◽  
Author(s):  
R. Omar ◽  
M. N. Abdul Rani ◽  
M. A. Yunus
Keyword(s):  
Finite Element ◽  
Dynamic Behaviour ◽  
Model Updating ◽  
Complex Structure ◽  
Bolted Joints ◽  
Model Parameters ◽  
Fe Model ◽  
Bolted Joint ◽  
Fe Modelling ◽  
Joint Structure

Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.

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