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Morsut L.,Danieli CentroMet | Rinaldi M.,Danieli CentroMet | Urbano A.,Danieli CentroMet | Lena M.,Danieli Automation
MPT Metallurgical Plant and Technology International | Year: 2014

The article deals with the 'rail mill,' the second site in Novokuznetsk, which is one of the largest manufacturers of a complete range of rails for the Russian and international markets. Railway, tramway and underground rails are manufactured here. The site comprises an EAF melt shop with two continuous casters, a rail and beam shop, and a long products mill. Production Evraz Consolidated West-Siberian Metallurgical Plant (Evraz ZSMK) is the easternmost steel producer in Russia and the largest in the Siberian region. In 2012, consolidated Evraz ZSMK produced 7.3 million t of crude steel and 6.3 million t of rolled products. In terms of production levels, it ranks among the five biggest steel companies in Russia and the top-five global rail manufacturers. In order to improve MSR efficiency, a new release of the liquid pool control (LpC) system was developed to calculate solidification and fine-tuned on the plant based on an analysis of the position of deliberately generated internal crack. Source

Rocchetti F.,Danieli Morga;rdshammar | Taurino A.,Danieli Morga;rdshammar | Mestroni A.,Danieli Automation
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2015

Some of the most significant Danieli innovations in the field of long products are the: «The EWR® system, through automatic continuous head-to-tail flash welding of billets at reheating furnace exit side, enables uninterrupted production of the mill for endless rolling of straight bars, wire rod and bar in coils. The process is particularly beneficial to wire rod and bar-in-coil mills as it enables production of "customized-size coils" (any coil weight according to specific Customer request) and with extra-high final coil weight, even starting from low-weight billets. » The Spooler process is based on twist-free winding of hot-rolled rebars into highly compact/ultra-heavy coils featuring a unique cobble-free un-coiling capability. This enables high-speed feeding of the downstream cold-processing lines with hot-rolled spooled coils coming directly from the rolling mill without the need of any traditional off-line operation (such as de-coiling, stretching & re-winding). The system results highly beneficial both to bar-in-coil producers and to the downstream lines operators. The latest step forward is the combined application of these two systems that has made it possible for endless rolling of spooled bar in coils, enabling to cumulate the benefits of the two processes, particularly as far as transformation costs are concerned. Source

Aurora C.,Danieli Automation | Ferrara A.,University of Pavia | Foscolo M.,University of Pavia
2007 European Control Conference, ECC 2007 | Year: 2015

The design of a globally stable second order sliding mode controller for sensorless induction motors is discussed in this paper. The adaptive component of the controller enables to compensate for the variation in time of the rotor resistance value, while the use of a suitably designed sliding mode speed/flux observer avoids the necessity of including speed and flux sensors within the control loop, making this proposal suitable for sensorless applications. The use of a second order sliding mode control approach, realized by regarding the second time derivatives of the stator currents as discontinuous auxiliary control inputs, is effective in limiting the mechanical wear, making this proposal more acceptable in practical applications than those based on conventional sliding mode control. © 2007 EUCA. Source

Del Pin L.,Ferriere Nord Pittini Group | Redolfi N.,Danieli Morga;rdshammar | Taurino A.,Danieli Morga;rdshammar | Buzzi G.,Danieli Automation
MPT Metallurgical Plant and Technology International | Year: 2012

Thanks to the collaboration between Ferriere Nord and the Danieli Group, the two-strand wire rod mill in operation since the end of the 1970s, has undergone several expansion phases. Today this mill is able to produce over 1 million t/year of wire rod. In spite of the recession that has affected steelmakers all over the world, it continues to be one of the most efficient and productive plants in Europe. Source

Zhang X.,Wright State University | Zhang Q.,Wright State University | Zhao S.,Wright State University | Ferrari R.,Danieli Automation | And 3 more authors.
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2011

In this paper, a fault detection and isolation (FDI) method is developed for wind turbines based on a benchmark system model. The FDI method follows a general architecture developed in previous papers, where a fault detection estimator is used for fault detection, and a bank of fault isolation estimators are employed to determine the particular fault type/location. Each isolation estimator is designed based on a particular fault scenario under consideration. Some representative simulation results are given to show the effectiveness of the FDI method. © 2011 IFAC. Source

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