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The article presents the results of work on the verification of the technological capabilities of the EB-Dual BEAM device in the field of complex coatings, including gradient coating Ti↑-Zr↓, multi-pattern coating Ti-Zr, and multi-layer coating Ti/Ti-Zr/Zr. The obtained coatings were subjected to an analysis of changes in the chemical composition by the EDS method as a function of distance from the...
The article shows the complexity of a marine object generating the necessity of multi-criteria optimization. Due to a great number of criteria and complexity of structure, the design process was classified as hierarchic with a descending structure. A spatial design spiral has been suggested, through developing a two-dimensional Evans’ spiral. Specifics of preliminary design have been discussed. A...
In the paper, the permeability of polymer nanofiltration membranes was analysed. The studies were carried out for the model wastewater chromium (III) solutions at pH 4. The model wastewater chromium (III) solutions were included different concentrations of NaCl, Na2SO4, and CrCl3 . It was found that on the membrane permeability is influenced by their morphology and electrostatic properties, regardless...
Few researchers recognize the differences between complexity and complicatedness. Recent research indicates that complexity is an inherent property of the system, and is not a negative attribute. Complicatedness is a design property that can be reduced starting at the design stage. Design solutions for complex systems can be complicated or simple. This study explores the current definitions of complexity...
The article considers the results of theoretical and experimental studies devoted to the creation of an electronic control system of fuel injection in diesel engines. The method of synthesis of the algorithm for all-speed electronic governor is described. The functional scheme used for the fuel delivery system control based on the microcontroller, the HEINZMANN electric servo actuator, and the BOSCH...
Distributed monitoring, control, and automation systems, often able to adapt and learn, are more widely used in industrial practice. Due to constantly increasing needs of safety and reliability of exploitation the area of smart systems applications in the Polish hard coal mining sector is also growing. At the KOMAG Institute of Mining Technology, the development and implementation of distributed control...
The key issue in the briquetting process in a roll press is to properly customise the working surface. The conventional symmetrical compaction units employed in roller presses are often unsuitable for the consolidation of materials that show quasi-plastic properties or those which show significant elastic deformation after the pressure is removed. This is caused by the fact that ready-made briquettes...
This paper presents a method allowing for the quality inspection of a screw thread directly on a production line. The parameter evaluation was performed on a surface partial image obtained using 3D laser triangulation. Three characteristic values are being measured for each element: minor pitch, major pitch, and pitch diameter. The paper contains an overview and discussion of methods commonly used...
Many computer aided design methods that are being presented in the literature are using advanced fatigue life assessment methods. The problem with the assessment is especially interesting in the moment when the calculations are performed for random loads. In such cases it is common to use one of two calculation methods. The first one is based in the time domain and it uses cycle counting algorithms...
Modern machining technology facilitates mechanical machining at high spindle speeds, which determines the use of machining lathe chucks that guarantee the correct clamping force of the workpiece. The work discusses the problems associated with the compensation of negative effects of centrifugal force acting on the jaws of lathe chucks. Calculations and constructional solutions including the author’s...
Microbial biofilm formation called “bio-fouling” causes many both epidemiological as well as technological problems by increasing material and energy demand. Due to the fact of growing microbial resistance, currently used methods of prevention have become less effective. This paper focuses on the antimicrobial properties of copper oxide deposited on the most common synthetic polymer (polypropylene)...
The article presents the results of a study on the distribution of Sauter Mean Diameter (SMD) along the axis of an atomized diesel oil spray and changes in SMD occurring during the injection in selected cross-section of the spray. A piston fuel pump was used for atomization, while atomization quality measurements were made using a Malvern Spraytec particle analyzer. The results show that adopting...
Safety aspects of mining personnel as well as the safety of the coal mining processes are presented. A mechanised longwall system is commonly used in the coal mining industry. The system consists of the basic machinery, such as a shear loader, an armoured face conveyor, and a powered roof support, which protects the roof of workings. The powered roof support consists of hydraulically or electro-hydraulically...
The technological line for processing decorticated flax fibre is an example of a prototype experimental technological line. In this type of objects, control systems need to be adjusted to the requirements imposed by the necessity to implement technologies with changing parameters whose values are set during experimental research. Moreover, the very structure of the technological line may be modified...
In the paper, the methodology of propeller strength analyses is presented. Numerical calculations based on the finite element method were used during the analyses. Analyses methodology is based on solid state mechanics with loadings determined by fluid mechanics calculations. Several propulsion working conditions (including steady-state and transient fluid flow) were taken into account. In order to...
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