Applied Mechanics and Materials Vol. 308

Abstract: The article deals with the assessment of lubricants properties, monitoring of behaviour and consequences of the lubricant degradation process during its work in the machine lubrication system of aircraft engine by using tribotechnical diagnosis. To be used four methods for qualitative and quantitative determination of large particles, which were found in oil during operation. Concentration of elements was determined by optical emission spectrometry with rotating disc electrode (RD OES) application, categorization of particles by dimension and quantity was performed by method of optical shading. By used of ferrographic analysis was studied morphology of wear particles and physic-chemical properties of oil were determined with Fourier transform infrared spectrometry (FTIR).

Abstract: The article contains information about the function and basic properties of the actuator based on pneumatic artificial muscles. It describes the design method of control structure of such actuator and shows the configuration of the non-linear actuator together with non-linear (compensation) control unit. The second upgrading method is based on the other mechanical configuration of the actuator. The artificial muscle force is transmitted by free pulley and has the practically linear static characteristic. The resulting position servosystem with linearized overall static characteristics has favorable results and better operation abilities. They are presented by experimentally measured step responses.

Abstract: In capability evaluation of measuring devices on the basis of diagnostics, it is important to compare variability of measurement with certain proportion of tolerance zone width of observed qualitative parameter. Determined index of capability of particular measuring device indicates its applicability for inspection of selected qualitative parameters in a given tolerance range. The paper is focused on evaluation of capability of digital micrometer DIGIMATIC within its entire measuring range (0 to 25mm) by the means of capability index Cgm and Cgmk. Evaluation of capability of the given measuring device was carried out by repeated measurements of standards with dimensions representing lower, middle and upper range of the measuring instrument at given accuracy (2μm) of measuring device.

Abstract: The submitted paper deals with studying the process how abrasive kind and granularity changes during abrasive-proof material Hardox thickness changing affects AWJ production system technology head vibration generation. The purpose of the paper are undesirable vibration possible sources diagnostics and elimination. The vibrations can affect negatively lifetime and wear of water jet technology head as well as cutting edge quality.

Abstract: The paper deals with a research of technology parameters fluctuation effect on AWJ production system technology head vibration generation during alloy cutting production process. The submitted paper points at possible sources of undesirable vibrations: technology head shift speed, kind and abrasive granularity, which can be a reason of reliability and AWJ technology production systems lifetime reduction, and of abrasive nozzle wear increasing as well as of cutting edge quality reducing.

Abstract: The paper deals with system of global monitoring in technological systems through the use of artificial intelligence elements. The holons and agents are the artificial intelligence elements that can be used for creation of systems for active and continuous control of active members of technological equipments.

Abstract: Microhardness is a basic controlled quality parameter according to functional coatings, which is linked with a number of physico-chemical properties, such as coating strength, abrasion resistance, resistance to deformation, life. Life of the coating from a diagnostic point of view is influenced by chemical, physical, technological and material conditions of the process of creating film. The paper deals with analysis of the microhardness coating created by anodic oxidation of aluminum with a direct link to the chemical and physical factors controlled by the Design of Experiments methodology at constant anode current density 2 A.dm-2.

Abstract: Influence of the technological procedures by process production of the parts and long-term operation on the material features. The formulation and analysis of the most frequent reasons and characteristic of damage on the parts made of creep-resisting chrome steel by breakage and suggestion of the prevention of their occurrence. The result present one of essential presumption for the diagnostics of operational States of products made of creep-resisting chrome steel.

Abstract: Technical diagnostics is currently the most important factor of reliability, dealing with forms of disorder manifestation, developing of disorders, their detection and working principles. As tool it has great value in operation and maintenance of facilities. It denotes great interest not only in scientific sphere but also in sphere of results application in the new developing methods and their using in professional practice. Using methods of technical diagnostics taking into account the reliability of measurement results both with new methods IT is one of the main tool for effective management of facilities, elimination of unacceptable conditions and other aspects. The article describes the application of technical and diagnostic tools on workplaces for monitoring behavior of the production machines and facilities.

Abstract: This contribution deals with possibilities of using the elements of augmented reality for generation of aided view to the manufacturing devices that work separately or as a part of production line. Idea of augmented reality is present in the form of special displaying unit based on utilization of half-silvered mirror which works on the principle of combination of two attributes – transparency and ability to reflect. With this mirror placed between worker and machine, different useful data and images can be added directly into real viewpoint, what can aid the diagnostic of machines and handling of their operational states and relevant issues.