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Non-contact vibration measurements for turbine blades in an aircraft engines are hindered by the very low level of vibration amplitudes and high temperatures. Thus high-temperature inductive sensors and data processing algorithms were developed by the Air Force Institute of Technology (ITWL) for the diagnosis of gas turbines. These sensors are suitable for a long-term operation at temperatures typical...
The unknown parameters of the exemplary object operation process are identified, its operation states are defined and the main characteristics of the Semi-Markov analytical method are determined. The reliability characteristics for the considered object at the variable operation conditions are determined. Additionally, it is assumed that the conditional reliability functions are different at various...
The implementation of Bayesian network into the investigations of the relationship between the reliability of search and rescue (SAR) action at sea and the reliability of the SAR action coordinator is proposed in the paper. The reliability parameters of SAR action are specified and the example of the determination of SAR action reliability in dependence on SAR action coordinator reliability, including...
In the article, we discuss probabilistic aspects for the risk assessment of the critical infrastructure subsystem. We present a short survey of probabilistic methods in safety analysis. Our purpose is appointing a few special probabilistic measures for predicting so-called rare events. These measures are an important component in the quantitative risk assessment associated with the maintenance of...
Diagnostics and evaluation of the technical state of roller bearings is one of the topical problems of in the evaluation of a machine's technical condition. Many of methods applied for the diagnostics of bearings are time-consuming and therefore could not be applied for the evaluation of a technical condition in real time. From the other hand, the development of such methods is necessary when considering...
The article presents a support method for personnel training and the operation of technical objects employing an original system in which the technology of augmented reality is applied. Additionally, an in-depth presentation of the technology of augmented reality and an example of its practical application are included. The article also describes the structure of the system composed of hardware elements...
The paper presents the results of experimental studies of the thermomechanical behaviour of the polymer roller bearings under the different operation conditions. The analysis of various combinations of materials usually used in commercial solutions was performed in order to evaluate specific states characteristic for these tribological pairs. The influence of a temperature growth during workloads...
While the pipeline is in operation and the working medium flows through the pipes many dynamic phenomena occur. They result in loads that are variable in time resulting in fatigue stresses in the material. Such loads could be the periodical bending of the straight fragments of the pipes. Tests on the accelerations of a selected fragment of a pipe led to the determining of its periodical displacements...
The paper deal with the methods used to assign cutting technological conditions providing the set-up parameters of surface layer quality in the cutting operation and used in the calculation estimation of the indices of product performance characteristics based on certain parameters of surface layer quality and cutting conditions. There is the necessity for critical machine parts to provide the required...
The paper highlights the modern method of high-performance machining of geometrically complex surfaces of gas turbine engine (GTE) blades, i.e. the method of creep feed grinding. This method is widely used to machine parts made of the difficult-to-get materials, e.g. the heat-resistant nickel alloys and the cobalt based alloys applied in the production of GTE parts. The grinding process under consideration...
Modern automated production requires technologies to provide stability in machining procedures and the absolute repeatability of the quality parameters obtained on the parts produced. Without the development of a new level of ESM procedures, the generation and implementation of technological equipment, and its complex functioning, it is impossible to produce new generation GTE for modern civil and...
The use of Life Cycle Assessment (LCA) in the design stage of technical objects is presented. Environmental analysis was conducted on a wrapping machine, with special interest given to its gear transmission. Using LCA, environmental profiles and environmental indices for different constructions of gear wheels are produced and, on this basis, on optimal combination of materials for elements of transmission...
The paper describes methods of computational error estimation in an edge cutting operation including the error components conditioned by the cutting process. The existing tables of economical accuracy for machining methods do not correspond properly with the precision attained on modern equipment, including the tools and cutters applied. For this purpose, the application of calculation methods is...
An analysis, done by the LCA Group from Faculty of Technical Sciences, University in Novi Sad, concerning the current situation in the field of LCA implementation in research and education in Central and Southeastern European countries reveald the absence of cooperation of scientific and research institution and LCA centres within the countries of Central and Southeastern Europe and the lack of communication...
The paper deals with the issues of the improvement of technological procedures aimed at machining of geometrically complex part surfaces, including the complex automation of technological procedures, and the intensification of machining processes due to wide application of high speed and creep feed grinding methods. The paper highlights today's solutions in the area of design and production of high-tech...
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