March 2013


Modern Machinery (MM) Science Journal, March 2013
Rostislav Raychev1, Simeon Simeonov2, Petar Petrov1
1Department of Automation, FITA TU-Varna
2Faculty of Mechanical Engineering, Brno University of Technology, Engineering Mechanics

In this publication are formed the main technical and economic requirements for system management of a commercial office building, consistent with the basic criteria for comfort and easy maintenance. Consider the formation of the organization and the functionality of the hierarchy system management of the power system by specifying the functions and allocation of tasks to solve all subsystems. Proposed is a structure and technical implementation. It is provided development of the system vertically, as a subsystem of a larger system. Resolved tasks are monitoring and management of the power system, automatic changeover and control and dialog with operator for emergency situations. The proposed subsystem implements manual and automatic control mode, local and central control.

Keywords: hierarchical system, power management, monitoring, automatic control, SCADA, PLC
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Modern Machinery (MM) Science Journal, March 2013
Petr Horejsi1, Tomas Gorner1, Ondrej Kurkin1, Patrik Polasek1, Martin Januska2
1Department of Industrial Engineering and Management, Faculty of Mechanical Engineering, University of West Bohemia
2Department of Business Administration and Management, Faculty of Economics, University of West Bohemia

Analysis of human working postures designated for ergonomics can be performed by traditional measuring instruments – pen and paper. However, this method allows within a given period of time only a very limited count of ergonomic analyses with consideration of human error. Larger companies (especially automotive) have made considerable financial investments in Motion Capture (MoCap) devices in recent years. This device is well known, e.g. from the film industry, where we can animate a virtual character as a result of capturing real actor movements. Thanks to the expensive MoCap device, it is possible to acquire positions of points (called markers) on a character ́s body in real time. The MoCap expenses can be significantly reduced with the aid of the KINECT device, which was originally designed for computer games. Although the potential is limited compared to traditional MoCap, for basic ergonomic analysis it represents a cheap and reliable alternative. The solution lies in connecting the software of the device with a professional tool for ergonomic analysis. This paper deals with usability analysis, financial and time demands of this new method of movement capturing (since September 2012). Every issue will be demonstrated in a case study.

Keywords: Ergonomics, Motion Capture, KINECT, PLM, Siemens PLM Industry, Process Simulate Human
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Modern Machinery (MM) Science Journal, March 2013
Jan Augste, Michal Holub, Radek Knoflicek, Tomas Novotny
Institute of Production Machines, Systems and Robotics Brno, Czech Republic

The article deals with the development of tools supporting a higher degree of visualization in order to assess the workload of electrical appliances installed in machine-tools. A higher degree of visualization means to forward the interpretation of the results from commonly used tables, graphs, and also 2D visualization, to 3D visualization. This enables us a considerably easier orientation in the virtual phase of the design and the control of not only the energy consumption of the machine-tools, but also of their structural nodes. The first part of the article deals with the possibilities and application of 3D visualization including the work with the required input data. There is a detailed description of how to construct the necessary data to create a 3D model, if these data are not available. The second part is concerned with the application created for simulation of energy flows in the machine-tool in dependency on time. There are described some of the obstacles that must be solved and also the benefits of the proposed solutions for the user. Finally, the present article briefly describes possible future developments of the software concerned. The tool developed for visualization was applied to the machine FUEQ 125 Efektiv company TOS Kurim in cooperation with the Czech Technical University in Prague, Faculty of Mechanical Engineering, VCSVTT – Research Centre for Manufacturing Engineering and Technology.

Keywords: Ecodesign, machine-tools, visualization, energy flows, simulation
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