کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1590663 1515432 2010 121 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling the dynamics and control design for Czochralski, Liquid Encapsulated Czochralski and Floating Zone processes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Modelling the dynamics and control design for Czochralski, Liquid Encapsulated Czochralski and Floating Zone processes
چکیده انگلیسی
Here we consider the problem of mathematical modelling of crystallization processes from the melt by Czochralski, Liquid Encapsulated Czochralski and Floating Zone methods based on linearization of three conservation laws: the heat, mass and the growth angle constancy is reviewed in depth. Special attention is given to the problem of the dynamical analysis of these processes in open and closed states and to the synthesis of the digital control of crystal diameter for the weight technique. The main problems discussed involve the determination of the parameters required for calculating such control systems together with the use of the multichannel parametric PID regulator involving the state variable observer concept. In addition briefly considered are the problems of digital filtering of the measurement noise based on multidimentional Kalman filters and the determination of mechanical stability limits for static menisci.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Crystal Growth and Characterization of Materials - Volume 56, Issues 1–2, March–June 2010, Pages 1-121
نویسندگان
,