Juraj Kováč

Mechanism of Randomness in Vibration Signals of Machinery

The paper deals with a special analysis of the vibration signal, which may reveal the chaotic behavior of the machine. The most likely effect of randomness is an exponential distribution. In case of the time interval divisions between peaks signal from vibrating machinery process has not a unique character of exponential distribution.

Experimental Verification of Force Feedback for Rehabilitation Robot

Unlike conventional robots, the equipment provided with pneumatic artificial muscles cannot integrate standard systems for force measurement. Applied measurement system involves specific attributes and requirements for pneumatic muscles. Force feedback of rehabilitation device equipped with pneumatic muscles was experimentally verified under the laboratory condition.

Integrated System of Mixed Virtual Reality Based on Data Glove CyberGlove II and Robotic Arm MechaTE Robot

Proposed paper describes development of CyberGlove II - MechaTE low-cost robotic hand interface intended for future use in virtual and mixed reality robot programming. The main goal is to explore possibilities and gain programing experience in controlling mechanical hands by means of data gloves and its interconnection to virtual reality modeling software. First part of paper describes recent progress in using virtual reality for purposes of intuitive robot programming; second part includes an overview of recent development of mechanical hands construction, as well as currently available data gloves. Last part provides details about CyberGlove – MechaTE interface and its potential for methods of intuitive robot programming in virtual or mixed reality environments.

The Effectiveness of a Three-Temperature Heat Pump System

Three-temperature heating systems consist of a heat engine and a heat pump, enabling thus maximum usage of the primary thermal source for the heating of buildings. This analysis has revealed obvious advantages and disadvantages that the combining of thermodynamic systems has in future development, also with respect to environmental and economic issues. It appears that the combination of a Stirling engine or a similar heat drive with a heat pump is especially suitable. In order to analyze the effectiveness of such a system, a comprehensive calculation procedure is used: its basis lies in accounting for all types of energy and their relationship to the original natural resource. The present paper aims to point out that the combination of Stirling engine and a heat pump is a useful solution thanks to the most favorable resultant economic impact if compared to the usage of a diesel, four-stroke gas, or, most commonly used, electric drive.

Interactive Generation of Spatial Solutions for Manufacturing Systems by Means of Virtual Reality

The contribution deals with the generation of interactive spatial solutions to manufacturing systems by means of virtual reality. It characterizes experimental work aimed at creating 3D models of manufacturing systems through technical and software resources of virtual reality. For innovative work is considered an example of data gloves in a virtual manufacturing environment. Data glove is used for placement of models means of production in manufacturing three-dimensional space.

Stress Analysis of the Thin-Walled Vessels

This article focuses on the analysis of stresses within a thin-walled vessel. Focused on rotary symmetrical shell, boundary faults arising at the junction of the cylindrical part of the vessel and its bottom are monitored. The bottom of the vessel is designed in three variants and obtained values of stresses are compared. From the obtained results it is possible to assess which form of the bottom is preferred.

Design of Pneumatical Rubik’s Cube Solver

Rubik’s solver is prime example of science popularizing mechatronic device, combining computer vision techniques, advanced Rubik’s cube solving algorithm and control of industrial pneumatic components. First version of solver constructed by our department was equipped only by 2 lower grippers, resulting in approximately four minutes for single cube solution. Proposed paper describes not only experience gained by development of upgraded 4 gripper version but includes statistical analysis of Thistlethwait’s 45 algorithm required for solving process optimization. Mechanical design, electronics, system overview, performance and limitations of upgraded 4 gripper version are explained in detail as well. Development of vision algorithm for robust cube detection is described in conjoint paper “Robust detection of Rubik’s cube state using Hough transform and advanced clustering functions.”

Practical Requirements on Production Systems

Paper aims to examine and systematize the activities relating to the development, production and use production base. Core of part of the contribution is based on systemized analysis of current approaches to use development of the manufacturing base and describes the problems that remain unresolved.

Approach to Creating Structures of Production Systems

Contribution of presents a set of information related to modelling the structures of automated production systems. For the creation of integrated structures of production logistics system uses the principles in order to clarify and streamline in-plant material flow between different logistics nodes, including the relevant information flow, eg. throughintegrable and compatible handling and technological systems.

Utilization of Virtual Reality Connected with Robotized System

Article deals with the interconnection of virtual reality and robotic systems. It describes the software and hardware resources that are used in virtual reality and their subsequent application and utilization with robotic systems. It also gives an example of such a interconnection using multimodular system that was developed in Japan by NTT company and own developed system which is under implementation.