Proceedings of 5th International Conference on Properties and Applications of Dielectric Materials, 1997
This paper presents a numerical method based upon Boundary Elements (BE) for the calculation of t... more This paper presents a numerical method based upon Boundary Elements (BE) for the calculation of the effective dielectric constant of a lossless random composite structure consisting of a two component mixture, each with its own dielectric and shape characteristics. The data obtained from the simulations investigated are compared to the results of previous analytical work
This chapter presents the "simultaneous design approach" which is an eminently complex ... more This chapter presents the "simultaneous design approach" which is an eminently complex process, as different stages of the design process are coupled (integrated), stages that are often sequential for purposes of simplification. The use of optimization techniques is an effective way to enable such integration. This chapter explains how an optimization problem is raised. These problems are often multi-criteria and nearly always under constraints. Among the various optimization methods, evolutionary algorithms are well suited to solving highly heterogeneous problems with mixed variables (continuous and discrete).
In this paper, Pareto Genetic Algorithms are applied to solve multiobjective optimisation problem... more In this paper, Pareto Genetic Algorithms are applied to solve multiobjective optimisation problems. In particular, a recent version of the nondominated sorting genetic algorithm (NSGA-II) is presented. A self-adaptive recombination scheme is used for crossover operators to improve the algorithm efficiency. Tests on mathematical functions of various difficulties are carried out to show the robustness of self adaptation. Finally, the self-adaptive NSGA-II is applied to the optimal design of an electrical system based on a inverter - permanent magnet motor - reducer - load association. It allows to reduce the global losses and weight in the system and help the designer to understand couplings and interactions between design variables in relation to technological constraints and objectives.
ABSTRACT This chapter contains sections titled: Introduction to energy hybridization via the exam... more ABSTRACT This chapter contains sections titled: Introduction to energy hybridization via the example of hybrid automobiles Energy management in electric junction hybrid systems with electric energy storage Indicators, criteria and data for the design of hybrid systems Examples in various application areas Conclusion for energy management in hybrid systems Bibliography
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2012
PurposeThe effectiveness of full passive wind turbine (WT) systems has been recently demonstrated... more PurposeThe effectiveness of full passive wind turbine (WT) systems has been recently demonstrated. Such low cost and reliable structures without active control and with a minimum number of sensors can be efficient only if the system design parameters are mutually adapted through an integrated optimal design approach. The purpose of this paper is to analyze the effectiveness of a passive WT with regard to the variations of PMSG electrical parameters.Design/methodology/approachThis work is more specifically devoted to the sensitivity analysis of a passive WT system according to the electrical variable variations of a Permanent Magnet Synchronous Generator (PMSG). It also investigates the interest of a robust design approach for reducing the sensitivity of the WT efficiency to the most influencing variables.FindingsIt is shown that efficiency of the passive WT system is rather sensitive to the variation of the stator flux and DC voltage at the system output.Originality/valueA robust de...
Proceedings of 5th International Conference on Properties and Applications of Dielectric Materials, 1997
This paper presents a numerical method based upon Boundary Elements (BE) for the calculation of t... more This paper presents a numerical method based upon Boundary Elements (BE) for the calculation of the effective dielectric constant of a lossless random composite structure consisting of a two component mixture, each with its own dielectric and shape characteristics. The data obtained from the simulations investigated are compared to the results of previous analytical work
This chapter presents the "simultaneous design approach" which is an eminently complex ... more This chapter presents the "simultaneous design approach" which is an eminently complex process, as different stages of the design process are coupled (integrated), stages that are often sequential for purposes of simplification. The use of optimization techniques is an effective way to enable such integration. This chapter explains how an optimization problem is raised. These problems are often multi-criteria and nearly always under constraints. Among the various optimization methods, evolutionary algorithms are well suited to solving highly heterogeneous problems with mixed variables (continuous and discrete).
In this paper, Pareto Genetic Algorithms are applied to solve multiobjective optimisation problem... more In this paper, Pareto Genetic Algorithms are applied to solve multiobjective optimisation problems. In particular, a recent version of the nondominated sorting genetic algorithm (NSGA-II) is presented. A self-adaptive recombination scheme is used for crossover operators to improve the algorithm efficiency. Tests on mathematical functions of various difficulties are carried out to show the robustness of self adaptation. Finally, the self-adaptive NSGA-II is applied to the optimal design of an electrical system based on a inverter - permanent magnet motor - reducer - load association. It allows to reduce the global losses and weight in the system and help the designer to understand couplings and interactions between design variables in relation to technological constraints and objectives.
ABSTRACT This chapter contains sections titled: Introduction to energy hybridization via the exam... more ABSTRACT This chapter contains sections titled: Introduction to energy hybridization via the example of hybrid automobiles Energy management in electric junction hybrid systems with electric energy storage Indicators, criteria and data for the design of hybrid systems Examples in various application areas Conclusion for energy management in hybrid systems Bibliography
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2012
PurposeThe effectiveness of full passive wind turbine (WT) systems has been recently demonstrated... more PurposeThe effectiveness of full passive wind turbine (WT) systems has been recently demonstrated. Such low cost and reliable structures without active control and with a minimum number of sensors can be efficient only if the system design parameters are mutually adapted through an integrated optimal design approach. The purpose of this paper is to analyze the effectiveness of a passive WT with regard to the variations of PMSG electrical parameters.Design/methodology/approachThis work is more specifically devoted to the sensitivity analysis of a passive WT system according to the electrical variable variations of a Permanent Magnet Synchronous Generator (PMSG). It also investigates the interest of a robust design approach for reducing the sensitivity of the WT efficiency to the most influencing variables.FindingsIt is shown that efficiency of the passive WT system is rather sensitive to the variation of the stator flux and DC voltage at the system output.Originality/valueA robust de...
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