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The article proposes a new algorithm for data analysis for diagnostics and the prediction of the loss of hydrodynamic stability in plain bearings associated with the appearance of oil vortexes in the lubricant. Their formation is related to the increase of the vibration energy of the spigot, which affects the change of the monitored movement of the shaft in the bearings. These vibrations are controlled...
Polish standards do not specify the research of yacht and boat armchairs that should be carried out before the introduction of a new armchair construction to the sales market. The only available standard that describes the method of testing boat and yacht armchairs is the “ABYC H-31 - Seat Structures” standard. The tests included in this standard are divided into several types of tests. The tests...
The purpose of this study is to perform automatic measurement of a screw thread profile acquired with a 3D vision system. Measurements are carried out using a laser triangulation method. The triangulation method requires a calibration procedure to be performed on a measurement stand. The first stage of the calibration procedure allows one to compensate for lens and perspective distortion. Calculated...
The ThermoRefinery is a new concept and an associated practice representing the 2nd generation of thermochemical processes for the conversion of renewable feedstocks (biomass and wastes) to fuels, chemicals and other biobased products, while solving the most significant problems limiting the potential of this type of technologies to contribute to global and regional targets. This paper aims at demonstrating...
Business Intelligence (BI) has become a challenge for the information technology, Industry 4.0, as well as a very important managerial issue. Its importance has been recognised especially in a development of analytically based decisionmaking capabilities having a reflection in software and computer systems. The main functions of BI-based technologies are data gathering, online analytical processing,...
The problem of the diagnostics of mechanical defects of combustion engines, especially of exhaust valves damages, occurs in several papers. Authors of these papers apply various inference techniques and limit investigations to the one selected object under specific work conditions. The results of the active diagnostics experiment, in which it was shown that completely different signal processing algorithms...
Ni-Nb-Zr/CaF2 amorphous coating was prepared on the surface of SA283GRA steel by adopting a high-power laser cladding system. The results show that the Ni-Nb-Zr/CaF2 coating obtained by laser cladding has a good metallurgical bonding with the matrix of SA283GRA and the amorphous phase was obtained. The different amorphous content was obtained with varied laser power. With the increase of laser power,...
The aim of the study was to investigate the influence of the type of the protective gas used during the pyrolysis of selected plant waste on the chemical structure and microstructure of produced biocarbons. The following types of vegetable waste were selected for tests: wheat straw, maize waste, flax straw, and cherries stones. Carbon dioxide or nitrogen was used as a protective gas during the pyrolysis...
Solvent-based or waterborne coatings commonly used in surface finishing of plastic or composite-based products exhibit very low spray transfer efficiency, typically not exceeding 30-35%. Powder coatings, an attractive 100% solvent-free alternative technology, achieve up to 95-98% material utilization. However, they require electrostatic deposition of charged powder particles and hence can only be...
In the present paper, we describe a sample application of Statistical Process Control aimed at improving the manufacturing process and enhancing the quality of the manufactured product. The selected object of study included a high-density polyethylene (HDPE) film manufacturing system and mass-produced plastic bags. The examination carried out during technological tests confirmed process capability...
Systems for the automated multi-parametric quality inspection of products manufactured with CNC machines are a key factor in increasing production efficiency. The optomechatronic measuring system developed by the authors of the article enables automatic non-contact quality inspection of products manufactured with CNC machines with efficiency corresponding to the manufacturing process in accordance...
This chapter reviews the research on antibacterial functionalization of textiles with inorganic nanoparticles (Ag, MgO, Al2O3) by the sonochemical method. Sonochemistry is one of the most efficient techniques for the synthesis of nanosized materials, wherein ultrasonic waves in the frequency range of 20 kHz to 1 MHz serve as a driving force for chemical reactions. Sonochemical reactions are dependent...
For the last several years, considerable progress in the use of the plasma surface engineering for the purposes of the surface layer’s modification has been observed. The magnetron sputtering method is one of the most important ones. This method consists in inducing the vapours of a solid body (target) by its surface’s bombardment with ions, most often the argon ones. The article presents a proposal...
The paper presents research results on the degradation of scintillators made out of thermoplastic composite materials based on polystyrene (PS). The samples were machined with the tools made out of three different material types: refractory alloys, synthetic diamonds, and diamonds mined from the Earth. The investigations enabled us to establish relations between the polystyrene scintillators’ machining...
Steel ropes cannot be refurbished through repairs, and wear processes during their use are cumulative. These processes include material fatigue, aging of the core, grease, and elements made of plastics, mass losses due to friction and corrosion, structural deformation, and changes in geometry. They are designed to perform specific functions under specific conditions. When the wear level is reached...
The aim of the work was to investigate the possibilities of shaping the properties of TiB2 coatings by doping with tungsten, which create hard boron phases (e.g., WB2 , WB4 , and W2 B5). The coatings were produced by a DC magnetron sputtering processes using two circular magnetrons (M1, M2) equipped respectively with M1 - target TiB2 , and M2 - target W. Ti-W-B coatings with different tungsten contents...
The “Cross-Forrest” tip shape calibration standard for regularized blind tip reconstruction has been fabricated and investigated. The confirmation of previously reported theoretical findings is shown. However, the KSVD-OMP algorithm of images denoising has been extended by additional group sparsity penalty and Shi Tomasi corner detection algorithm with 100 nm size window for cross concave corners...
This study presents general conclusions resulting from elastic FEM analyses of several dozen of thin-walled structures designed with the use of the application version of the method of statically admissible discontinuous stress fields (SADSF). The conclusions are illustrated with examples of two original structures designed to work under torsional load. The structures are based on I-sections, whose...
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