Forthcoming articles

 


International Journal of Nonlinear Dynamics and Control

 

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International Journal of Nonlinear Dynamics and Control (2 papers in press)

 

Regular Issues

 

  • Genetic model reference adaptive control of shell heavy oil fractionator   Order a copy of this article
    by Dauda Araromi, Aminah Sulayman, Olajide Ajala 
    Abstract: Fractionators are characterized by high non-linear dynamic behaviour, strong loop interactions and model uncertainties. Relative Gain Array was used to determine the level of loop interaction. Dynamic decoupler was used to remove the interactions which were obtained using feed-forward design technique. A feedback control system is designed for the dynamic decoupled plant using Ziegler-Nichols tuned Proportional Integral (PI) controller. A Genetic Model Reference Adaptive Controller (GMRAC) is designed to control the fractionator using a second order reference model and adaptation mechanism based on genetic algorithm. Genetic algorithm uses real coded data generation for optimization. Comparison is made with the PI controller. Performance indices were based on settling time, rise time and overshoot.
    Keywords: GMRAC; adaptive control; PI; MATLAB; relative gain array; shell heavy oil fractionator.

  • Dynamic Flow Control of a Photovoltaic Pumping System Based Asynchronous Induction Motor   Order a copy of this article
    by LAYATE Zakaria, BAHI Tahar, LEKHCHINE Salima 
    Abstract: In this study, a dynamic control have been developed to improve the performances of photovoltaic system fed three phases induction motor drive which serves for pumping applications. Photovoltaic systems have one of the highest potentials for generating electrical power. In this systems, the photovoltaic cell is the basic device of the conversion process. Indeed, photovoltaic cells are low power generators. Therefore, association of serial and parallel cells and modules forming photovoltaic generator is mostly recommended for supplying isolated areas where pumping systems play a predominant role. However, the generated power depends ,essentially, on climatic parameters especially the temperature and the solar irradiation. So, to improve photovoltaic installations yield, a maximum power point tracker controller embedded boost converter which serves to maximize produced power whatever climatic operating conditions. furthermore, due to the remarkable performances, the researches proved that pumping systems based photovoltaic generators have became ideal structures for remote areas. The simulation results under MatLab/Simulink software reveal that the proposed system is versatile.
    Keywords: Renewable energy; photovoltaic; motor; inverter; pumping; MPPT; control;.