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A Review of the Automation of the Czochralski Crystal Growth Process

Winkler J., Neubert M., Rudolph J.

Zeszyty Historyczne Politechniki Warszawskiej

2014

z. 16

123--134

On the occasion of the centennial of the invention of the Czochralski crystal growth process by the Polish scientist Jan Czochralski, a review of selected strategies for the automatic control of this process is given. This review provides a sketch of the fundamental challenges of controlling the Czochralski process and the basic concepts of feedback control. Both early and modern approaches to the control of the Czochralski process are described. The discussion focuses on questions related to feed-forward control, feedback control, and state estimation. The presented methods rely on simple mathematical process models in contrast to the finite element model-based approaches typically used in crystal growth process design and analysis. Such mathematical models motivate both the structure and parameters of the chosen controller. A comprehensive list of references to background literature on this topic completes this survey.

The harmonization and optimization of diagnostic methods for a belt conveyor

Helebrant F., Moni V., Klouda P., Valentova H., Nedbal J., Neubert M., Kudelova I.

Management Systems in Production Engineering

2012

nr 2 (6)

39-44

The final aim of the project MPO FR�]T11/537 called �gThe Complex Diagnostic System for the Belt Transport�h is a single part custom manufacturing and sale of complex diagnostic system for belt transportation and related services. The output of the project is a prototype of a diagnostic system on a model belt conveyor with prepared and certified diagnostic services and methods including their measurements and other supportive tools. The article will introduce the present state of the solution for the given grant project, especially in the field of suggested work on the diagnostic and supportive methods and other measurements.

Antyferroelektryczne ciekłe kryształy z fluorowanymi fragmentami łańcuchów terminalnych. Cz.1, Synteza związków ciekłokrystalicznych i półproduktów

Drzewiński W., Czupryński K., Dąbrowski R., Neubert M.

Biuletyn Wojskowej Akademii Technicznej

1998

Vol. 47, nr 7-8

53-68

Opracowano metodę otrzymywania optycznie czynnych hydroksestrów: 1-hydroksy-4-(oktyl-2-oksykarbonylo) benzenu i 4-hydroksy-4'-(oktyl-2-oksykarbonylo) bifenylu, 4'-hydroksy-bifenylo-4-karboksylanu 4-(oktyl-2-oksykarbonylo)fenylu, 4-hydroksybenzoesenu 4`-(oktyl-2-oksykarbonylo)bifenyl-4-ylu. Związki te wykorzystano do otrzymania ośmiu serii homologicznych ciekłokrystalicznych di-triestrów wykazujących obecność faz skośnych Ca* i C*.

The method has been elaborated of preparation the optically active hydroxyesters: 1-hydroxy-4-(ocyl-2-oxycarbonyl)benzene and 4-hydroxy-4'-(octyl-2-oxycarbonyl)biphenyl, 4-(octyl-2-oxycarbonyl)-phenyl 4'-hydroxybiphenyl-4-carboxylate and 4'-(oktyl-2-oxycarbonyl) biphenyl-4-yl 4-hydroxy-benzoate. These intermediates were used for the preparation of loquid crystalline homologous series of di- and triesters exhibiting the presence of tilted phases CA* and C*.