Synthesis of the control system of the temperature field in the carbon-graphite thermal node during the growth of leucosapphires

This article is devoted to the development of a control system of the temperature field in the carbon graphite thermal unit during the growth of leucosapphire crystals by the horizontal directional crystallization (HDC) method. The paper presents the results of developing a model of automated control system for maintaining the specified temperature conditions at the crystallization front. The work solves the following tasks: the mathematical model of the crystal growth process was developed, analysis and identification of the control object based on the numerical solution, calculation of distributed high-precision controller parameters using frequency synthesis method, computer modeling of a closed-loop control system. Based on the obtained transient characteristics, direct quality indicators of the synthesized control system were calculated, which confirmed that the calculated settings of the corrective device allow to achieve the control objective – maintaining the specified temperature conditions at the crystallization front.

Authors: V. G. Fetisov, E. A. Yaromich, I. M. Novozhilov

Direction: Informatics, Computer Technologies And Control

Keywords: crystal growth, horizontal directional crystallization method, distributed high-precision controller

---

View full article