Pavel Vazan

• Slovak University of Technology in Bratislava

The core of this publication is the design of a system for evaluating the condition of production equipment and machines by monitoring selected parameters of the production process with an additional sensor subsystem. The main positive of the design is the processing of data from the sensor layer using artificial intelligence (AI) and expert system...

Developments in the production sector during recent years have led to rapid growth in usage of automated systems when it comes to communication and data exchange. Such systems help businesses with acquiring new customers, while also providing means to react to sudden changes in product demand and competition with the rest of the market. These circu...

Real-time simulation and digital twin (DT) as a part of Industry 4.0 are becoming increasingly relevant, especially when considering production cycles. Most issues with production cycles arise from having a demand for customized production orders, while having nonmodular production lines with a medium-to-high complexity in the decision-making proce...

The article is focused on the use of progressive techniques in the process of design and implementation of a heterogeneous multirobotic cell control system. The task of visualization as a modern approach to the creation of applications for industrial automation is presented. The way of using the visual approach in the creation of the robotic cell w...

Heat production planning is a challenging task that dispatchers have to solve each day because the production planning is based on their experience They are the ones who decide when to turn on/off boilers. District heating network operators must secure stable heat supply under different circumstances, of course, with regard to different economic, t...

This paper represents a case study on proposing a Digital Twin of an experimental production line Agro, Food and Beverages Factory (AFB Factory) of Festo Didactic. Digital Twin is one of the Industry 4.0 technologies, even though not very developed, simulation and building Cyber-Physical Systems is essential for gathering data and improving product...

As the term of Industry 4.0 becomes more and more relevant with each passing day, it is up to researchers and companies to find solutions to integrating all the technologies it covers. One of those technologies, even though not highly developed, is simulation and building Cyber-Physical Systems for gathering data and improving the production proces...

The utilization of a specific priority rule in scheduling operations in flexible job shop systems strongly influences production goals. In a context of production control in real practice, production performance indicators are evaluated always en bloc. This paper addresses the multi-criteria evaluating five selected conflicting production objective...

The article addresses an approximate solution to the multi-objective optimization problem for a black-box function of a manufacturing system. We employ the surrogate of the discrete-event simulation model of a batch production system in an analytical form. Integration of simulation, Design of Experiments methods, and Weighted Sum and Weighted Produ...

IoT systems are an integral part of every modern industrial enterprise Industry 4.0. IoT is the term for modern remote devices controlled via the Internet. Internet of Things is the name of technologies that allow cheap wireless connection and communication of various sensors and devices to automate, accelerate and streamline processes. In the inte...

In an optimal processes control, where the considered goals are in general observed as concurrently conflicted, a multi-objective approach fits the best. Commonly used scalarization techniques in multi-objective optimization need a transformation of the individual single-objective functions involved into a scalar multi-criteria objective function....

This paper deals with proposal of a proactive simulation model for a hybrid production system with an integrated MES used for safety, security, control, maintenance and service training with equipment similar to one utilized in a real industrial process. A proactive planning methodology can use information about real time changes in input data used...

The Industry 4.0 concept assumes that modern manufacturing systems generate huge amounts of data that must be collected, stored, managed and analysed. The case study is focused on predicting the manufacturing process behaviour according to production data. The paper presents the way of gaining knowledge about the future behaviour of manufacturing s...

Predictive maintenance (PdM) techniques are designed to help identify the condition of devices in order to predict when maintenance should be performed. The ultimate goal of PdM is to perform maintenance at a scheduled point in time when the maintenance activity is most cost-effective and before the equipment loses performance within a threshold. C...

Text mining is the process of extracting useful and high-quality information from unstructured textual data through the identification and exploration of interesting patterns. Text mining also referred to as text data mining, roughly equivalent to text analytics. RapidMiner is unquestionably the world-leading open-source system for this analytics,...

Predictive maintenance (PdM) techniques are designed to help identify the condition of devices in order to predict when maintenance should be performed. The ultimate goal of PdM is to perform maintenance at a scheduled point in time when the maintenance activity is most cost-effective and before the equipment loses performance within a threshold. C...

Due to the increasing competitive environment in the manufacturing sector, many industries have the need for a computer integrated engineering management system. The Manufacturing Execution System (MES) is a computer system designed for product manufacturing with high quality, low cost and minimum lead time. MES is a type of middleware providing th...

The paper provides a view of Material Resource Planning implementation. The authors describe the MRP II implementation techniques and define the necessary requirements for its successful implementation. Possible practical implementation doubts are being pointed out on an actual real-world example. Issues can appear especially in the warm-up period...

A heat transfer approach to the calculation of residual power of used nuclear fuel (UNF). This application is a conceptual design of an alternative method for determination of residual power of UNF. Our approach is based on the heat transfer analysis of UNF in the transport container with a compact storage cask. To our knowledge, the proposed metho...

The goal of this paper is to provide a mathematical threat modeling methodology and a threat risk assessment tool that may assist security consultants at assessing the security risks in their protected systems/plants, nuclear power plants and stores of hazardous substances: explosive atmospheres and flammable and combustible gases and liquids, and...

The paper deals with the problem of simulation optimization and presents its usage for input control in a production system. The paper gives an overview of typical concepts of input control. Authors propose different approaches. The basic principles of simulation optimization are explained. A general procedure with each step is defined and this pro...

In this paper, we develop a new method for determining the residual power of used nuclear fuel (UNF). The method is based on the heat transfer analysis of UNF in a C-30 transport container with a KZ-48 compact storage cask. We compare the results achieved by the currently used SCALE 6 software packages based on nuclear physics calculations and the...

This paper deals with the simulation of photon propagation in the maternal abdomen. Authors focused on the light transport, photon trajectory and their radiation in three-layer tissue. The main aim of this study is to observe the behaviour of photon in three-layer tissue. A simulation model has been implemented in Matlab. The photon interaction wit...

This paper deals with the light transport, photon trajectory and its radiation in tissue. A model based on Monte Carlo simulation has been implemented in Matlab to get inside into photon interaction with tissue. The project is aimed to non-invasive pulse oximetry measurement of fetal oxygen saturation in the maternal abdomen. One of the fundamental...

This paper deals with the light transport, photon trajectory and its radiation in tissue. A model based on Monte Carlo simulation has been implemented in Matlab to get inside into photon interaction with tissue. The project is aimed to non-invasive pulse oximetry measurement of fetal oxygen saturation in the maternal abdomen. One of the fundamental...

We analyze the dynamics of the forced singularly perturbed differential equations of Duffing’s type with a potential that is bounded from above. We explain the appearance of the large frequency nonlinear oscillations of the solutions. It is shown that the frequency can be controlled by a small parameter at the highest derivative.

The paper gives the next stages of the project that is oriented on the use of data mining techniques and knowledge discoveries from production systems through them. They have been used in the management of these systems. Production data was obtained in previous stages of project. This production data are stored in data warehouse that was proposed a...

The paper presents the simulation optimization as a good tool for solving many problems not only in research, but also in real praxis. It gives basic overview of the methods in simulation optimization. The authors also characterise their own experiences and they mention advantages and problems of simulation optimization. The paper is a contribution...

The main objective of the project was to investigate the influence of the selected priority rules of technological operations on chosen production goals. The paper presents the results of the project. The dynamic scheduling process of operations was simulated on the model of production system. The effect of each priority rule has been studied for d...

The paper gives the pilot results of the project that is oriented on the use of data mining techniques and knowledge discoveries from production systems through them. They have been used in the management of these systems. The simulation models of manufacturing systems have been developed to obtain the necessary data about production. The authors h...

The article provides the general overview and base proposal of solution in the area of controlling the IT resources within the company. It points out some common deficits of integrating systems and running data transfers. Lack of functionality in some large systems is supplemented by using interim database and proposed SQL processing prior to data...

The today's determination of residual power of nuclear fuel in containers bases on differential equations, which describe the creation and the destruction of nuclides in the fuel. The Nuclear Regulatory of Slovak Republic requires the verification of present methodology alternatively. The new methodology and achieved results in determination of res...

The paper gives the final results of the research project: "The proposal of an alternative procedure of manufacturing lot size determination in flexible manufacturing systems by simulation optimization." The authors present the alternative method for determination of lot size. The method uses the simulation optimization as a base procedure. The aut...

The aim of this article is to suggest the partial proposal of datawarehouse testing methodology. The analysis of relevant standards and guidelines proved the lack of information on actions and activities concerning data warehouse testing. The absence of the complex data warehouse testing methodology seems to be crucial particularly in the phase of...

The paper presents the methods of simulation optimization. The authors point out the problems of simulation optimization. They compare some typical algorithms on the real example. The main goal is to give the general procedure for effective usage of simulation optimization. This procedure involves the process of selection of algorithm, input variab...

The paper presents the way how to use simulation optimization for determination of lot size in FMS. It provides the basic methods and procedures. The simulation optimization can be alternative procedure to classic analytical methods. This procedure involves more factors that influence lot size, than analytical methods. Therefore it is more accurate...