ZnTiCu (zinc-titan) sheets with approximately 0,1% Cu and 0,1% Ti content are very widely used in the construction industry for roof covering, gutters, drain pipes, facing linings, connections, window shelves, decorative elements on roofs, art products, etc. Data on the production technology of zinc-titan alloy sheet and on its forming properties are very scarce and unreliable. Therefore they m...

A hot strip mill for the production of steel is a complex process where nonlinear dynamic phenomena occur and many control loops need to be tuned taking into account their interference. The control problem of the interstand tension and looper arm position is addressed in this paper. With respect to the conventional PID control approach, our investigation aims at exploiting nonlinear control tec...

Most approaches of chance–constrained robust MPC utilise an open– loop model for uncertainty prediction; this results in conservative control. To avoid this some approaches propose robust MPC (RMPC) based on closed–loop prediction, and these often give improved dynamic performance at a small expense to constraint handling performance. The aim of this paper is to extend the methodology of (Warre...

In the given work the problem of construction (synthesis) of mathematical model of unknown or littleknown external load (EL) on open dynamic system is considered. Such synthesis is carried out by special processing of the experimentally measured response of dynamic system (method of identification). This problem is considered in two statements: the synthesis of EL for single model and the synth...

Abstract. The purpose of the study is to develop an automated system for technical diagnostics state and regu-lation electric drive rollers collector roller table at a wide hot rolling mill based on change in load currents motors. allows quality finished rolled products produc-tivity be enhanced due timely detection faulty equipment its rapid replacement results diagnostics. following methods d...

This article compares two techniques: Data Envelopment Analysis (DEA) and Factor Analysis (FA) to aggregate multiple inputs and outputs in the evaluation of decision making units (DMU). Dِata envelopment analysis (DEA), a popular linear programming technique, is useful to rate comparatively operational efficiency of DMUs based on their deterministic or stochastic input–output data. Factor analys...

The Stressometer product line (for more information, refer to www.abb.com) involves software intensive systems, which have been providing rolling mills with accurate online control of the flatness of cold rolled strips for more than 30 years. Over these years, ABB has been continuously improving these products parallel to the technological progress in software engineering in an attempt to keep ...

Toshiaki Takahashi Takaaki Ozawa Hajime Takahashi OVERVIEW: Steel industry control systems tend to be large, comprising motors, drives, PLCs, and process computers among other components. In addition to reliability, they require the speed of response to perform realtime electrical and mechanical control. To achieve this, Hitachi uses the latest computing and information technology. Hitachi is a...

Workers of iron and steel factories are exposed to a wide range of pollutants depending on the particular process, the materials involved, the effectiveness of monitoring and the control measures. Adverse effects are determined by the physical state and propensities of the pollutant involved, the intensity and duration of the exposure, the extent of pollutant accumulation in the body and the se...

there is a complicated relation between cold flat rolling parameters such as effective input parameters of cold rolling, output cold rolling force and exit thickness of strips. in many mathematical models, the effect of some cold rolling parameters has been ignored and the outputs have not a desirable accuracy. in the other hand, there is a special relation among input thickness of strips, the ...