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A Simplified Model for the Prediction of Long Term Concrete Drying Shrinkage
D. Boucherit,S. Kenai,E. Kadri,J. M. Khatib 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.7
This paper presents a model developed to estimate the long-term drying shrinkage of concrete. This model was derived by means of statistical analysis using published experimental data. The accuracy of the proposed model was favourably compared with four common methods. The proposed model was validated by comparison with available experimental data. The performance of the model was also compared to that of other models by mean of residual value and the sensitivity to some parameters and square error. It was found that a good estimation of long term drying shrinkage was obtained using this model.
A. Tlemcani,O. Bouchhida,K. Benmansour,D. Boudana,M. S. Boucherit 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.1
This paper introduces the design of a fuzzy logic controller in conjunction with direct torque control strategy for a Permanent Magnet synchronous machine. A stator flux angle mapping technique is proposed to reduce significantly the size of the rule base to a great extent so that the fuzzy reasoning speed increases. Also, a fuzzy resistance estimator is developed to estimate the change in the stator resistance. The change in the steady state value of stator current for a constant torque and flux reference is used to change the value of stator resistance used by the controller to match the machine resistance.
Tlemcani, A.,Bouchhida, O.,Benmansour, K.,Boudana, D.,Boucherit, M.S. The Korean Institute of Electrical Engineers 2009 Journal of Electrical Engineering & Technology Vol.4 No.1
This paper introduces the design of a fuzzy logic controller in conjunction with direct torque control strategy for a Permanent Magnet synchronous machine. A stator flux angle mapping technique is proposed to reduce significantly the size of the rule base to a great extent so that the fuzzy reasoning speed increases. Also, a fuzzy resistance estimator is developed to estimate the change in the stator resistance. The change in the steady state value of stator current for a constant torque and flux reference is used to change the value of stator resistance used by the controller to match the machine resistance.