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Akielaszek-Witczak A.,State Higher Vocational School in Glogow | Mrugalska B.,Poznan University of Technology | Puig V.,Polytechnic University of Catalonia | Wyrwicka M.K.,Poznan University of Technology
IFAC-PapersOnLine | Year: 2015

A growing demand for technologically advanced systems has contributed to the increase of the awareness of systems safety and reliability. Such a situation requires the development of novel methods of robust fault diagnosis. The application of the analytical redundancy based methods for system fault detection causes that their effectiveness depends on model quality. In this paper, a new methodology for the improvement of the neural model with a D-optimum sequential experimental design technique combined with outer bounding ellipsoid algorithm is proposed. Moreover, a novel method of robust fault detection against neural model uncertainty and disturbances is developed. Such an approach is used for modelling and robust fault detection of the three-screw spindle oil pump. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.


Mrugalska B.,Poznan University of Technology | Akielaszek-Witczak A.,State Higher Vocational School in Glogow | Aubrun C.,University of Lorraine
Chemical Engineering Transactions | Year: 2015

Recently, there is a high demand on companies for high quality, reliable products for a reasonable price in a timely manner. In order to provide such goods novel methods of product quality control are required to be developed and used in industrial practice. For example, it is possible to use methods based on analytical redundancy. In such approaches the effectiveness of the methods depends on the quality of a product model. This paper proposes a new methodology for improving the neural model of the controlled product. For this aim experimental design technique is applied. Furthermore, a method of product quality control robust to neural model uncertainty is developed. All these conceptual approaches find the practical application for the threescrew spindle oil pump. Copyright © 2015, AIDIC Servizi S.r.l.


Bydalek A.W.,University of Zielona Gora | Najman K.,BOLMET S.A. | Kula A.,AGH University of Science and Technology | Biernat S.,State Higher Vocational School in Glogow | And 2 more authors.
Archives of Foundry Engineering | Year: 2016

Trial series of cast alloy MO59 obtained from qualified scrap was investigated. SEM and TEM of resulting precipitates were conducted. The SEM analysis demonstrated the dependence of silicon, phosphorus, iron, chromium and nickel in the composition of the so-called hard precipitates. TEM analysis showed the formation of phase AlFeSi and AlCr. Made studies have shown the important role of the composition of the batch melts brass CuZn39Pb2 type. The analysis of SEM and TEM resulting precipitates pointed to the formation of various forms of divisions, only one of which was described in the literature character of the so-called hard inclusions. The SEM studies demonstrated the dependence of the occurrence of inclusions rich in silicon, phosphorus, iron, chromium and nickel. In contrast, additional TEM analysis indicated the formation of AlFeSi phase type and AlCr. The results of the analyses referred to the structure of the batch. Due to the difficulty of obtaining recycled materials that do not contain these elements necessary to carry out further analyzes in the direction of defining the role of phosphorus in the formation of the so-called hard inclusions. © 2016 A.W. Bydałek et al., published by De Gruyter Open.


Bydalek A.W.,AGH University of Science and Technology | Biernat S.,State Higher Vocational School in Glogow | Wolczynski W.,Polish Academy of Sciences | Bydalek A.,State Higher Vocational School in Glogow
Archives of Foundry Engineering | Year: 2015

Discusses an attempt to optimize the operation of an electric furnace slag to be decopperisation suspension of the internal recycling process for the production of copper. The paper presents a new method to recover copper from metallurgical slags in arc-resistance electric furnace. It involves the use of alternating current for a first period reduction, constant or pulsed DC in the final stage of processing. Even distribution of the electric field density in the final phase of melting caused to achieve an extremely low content of metallic copper in the slag phase. They achieved by including the economic effects by reducing the time reduction. © A.W. Bydałek et al. 2015.


Bydalek A.W.,AGH University of Science and Technology | Bydalek A.W.,University of Zielona Gora | Bydalek A.,State Higher Vocational School in Glogow | Wolczynski W.,Polish Academy of Sciences | Biernat S.,State Higher Vocational School in Glogow
Archives of Metallurgy and Materials | Year: 2015

The article presents an outline of the new technology of pyrometallurgical processing of slag in the direct-to-blister process. The analysis is based on the example of the production process of KGHM Polish Copper SA. A new way of implementing the technology of recovery of copper from the flash furnace slag by means of different feedstocks has been proposed. The method of controlling the processes is another innovation discussed in the paper. The presented concept intensify the reduction reactions, using the Carbo-N-Ox method, of copper compounds to forms of metallic phases in the slag. The processes of coagulation are accelerated and the processes crystallization of metallic phases are under control.

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