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Content available remote Optimal control of an industrial electrostatic rotating electrode separator using artificial intelligence technics
Dahou Omar, Touhami Seddik, Ayache Zouaoui
Przegląd Elektrotechniczny
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2019
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R. 95, nr 11
170--175
EN
The main purpose of this study is the multicriterion optimization in a dynamic context of the operation of an industrial electrostatic separation process with rotating electrode. A study of the operation of this process, performed by using an artificial neural network (ANN), has shown the complexity of adjusting the control variables for use in the industrial field. In this context, a multifactorial control approach has been proposed using meta-heuristics based on artificial intelligence.
PL
W artykule zaprezentowano multikryterialną optymalizację przemysłowego separatora elektrostatycznego z ruchomymi elektrodami. Do optymalizacji wykorzystano sztuczne sieci neuronowe.
2
Content available WTHD minimisation in hybrid multilevel inverter using biogeographical based optimisation
Kavitha R., Thottungal R.
Archives of Electrical Engineering
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2014
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Vol. 63, nr 2
187--196
EN
Harmonic minimisation in hybrid cascaded multilevel inverter involves complex nonlinear transcendental equation with multiple solutions. Hybrid cascaded multilevel can be implemented using reduced switch count when compared to traditional cascaded multilevel inverter topology. In this paper Biogeographical Based Optimisation (BBO) technique is applied to Hybrid multilevel inverter to determine the optimum switching angles with weighted total harmonic distortion (WTHD) as the objective function. Optimisation based on WTHD combines the advantage of both OMTHD (Optimal Minimisation of Total Harmonic Distortion) and SHE (Selective Harmonic Elimination) PWM. WTHD optimisation has the benefit of eliminating the specific lower order harmonics as in SHEPWM and minimisation of THD as in OMTHD. The simulation and experimental results for a 7 level multilevel inverter were presented. The results indicate that WTHD optimization provides both elimination of lower order harmonics and minimisation of Total Harmonic Distortion when compared to conventional OMTHD and SHE PWM. Experimental prototype of a seven level hybrid cascaded multilevel inverter is implemented to verify the simulation results.
3
Content available remote Oxide crystals for solid state laser applications
Łukasiewicz T., Majchrowski A., Mierczyk Z.
Opto-Electronics Review
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2001
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Vol. 9, No. 1
49-56
EN
Recent trends in optoelectronics are towards small solid state lasers pumped by laser diodes. The paper describes efforts to create material basis for the development of this branch of optoelectronics. Single crystal growth and properties of many compounds acting as active laser or self-frequency doubling materials, passive modulators, nonlinear optical materials, and acousto-optic materials are discussed, including aluminium garnet with high neodymium concentration, vanadates, borates, and double tungstates.
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