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The paper presents the application of simulation-based component importance measures for complex technical systems. A stern tube sealing system was installed on a sea vessel as an example of a complex technical system (CTS). Selected statistics of ship operation losses were generated as well as the following measures: the failure criticality index, the downing event criticality index, and the downtime...
The legal regulations governing the water and wastewater management in enterprises and the announcements of their changes have been discussed. Potato processing water (PPW), resulted from potato chips processing line, was examined. The possibility of PPW treatment using ultrafiltration was investigated. A laboratory filtration plant and polysulfone flat sheet membranes (cut-off - 100 kDa; effective...
Intense advancement of optical measurement techniques, which is accompanied by the development of new calibration technologies and accuracy assessment methods determine new fields of necessary research and verification tests. In the Laboratory of Coordinate Metrology of the Cracow University of Technology (LCM CUT), works have been conducted for years dedicated to optical coordinate measurements....
The article presents a model system for the production of AC electrical energy from a low temperature heat using thermoelectric generators TEGs. Combinations of many TEGs in various configurations have been described. The results of the mutual influence of thermoelectric generators on the ability to generate resultant electrical energy depending on the temperature distribution and the heat supplied...
The paper is a discussion on the problems regarding the determination of possible methods to recover waste heat from marine diesel engines in an engine room. Waste heat resources of low-speed and medium-speed marine diesel engines are specified herein. The paper also includes a classification of the marine waste heat recovery systems taking into account the degree of their technical complexity and...
The article presents a method of evaluating irradiance, spectral irradiance, and spectral radiance, for purposes of determining risk groups of light sources. Measurement methods have been developed on the basis of general requirements and diagrams incorporated in the standard EN 62471: 2008. The paper classifies risk groups of light sources and luminaires in terms of photobiological hazard and exposure...
Machining errors can be caused by various factors, such as thermal deformations of milling machine, drives and milling machine accuracy, tool run out, tool deflections during the machining process, and workpiece setup errors. The main purpose of this paper is to determine and compare machining errors of a Kern Pyramid Nano milling machine and a prototype micro milling machine built at West Pomeranian...
Digital image correlation (DIC) and Optical flow method (Flow) are among the widely used methods in displacement detection applications. Both methods allow the use of sub-pixel information, leading to increase accuracy. The authors decided to verify the accuracy of the displacement detection of these methods by comparing the results with real displacement. The tests were performed on a special system...
In the article, the literature notions of maintenance and exploitation have been characterized. The process of incorporating RCM into the industry from the seventies has been presented. The major features of reliability centred maintenance (RCM) as well as maintenance activities complying with RCM assigned to different categories have been characterized. In the final part of the paper, it has been...
The paper presents an innovative measurement system implementing flexible support of a crankshaft. Through adjustment of support conditions, deflection and strain of the crankshaft under its weight can be eliminated. The principles of the selection of forces in the flexible support system and an analysis of the impact of rolling resistance on the deformation of the measured object are presented.
The article presents a systemic approach to erosive wear testing that allows nonstandard erosion tests of construction and functional materials to be carried out in a wide range of variability of the erosion process parameters, and the testing system allows the identification of phenomena occurring during impact erosion. The methodology and a unique device for the simulation of the erosive wear process...
The location of a hole during the welding of aluminium has an influence on the residual stresses. 2D FEM model of the welded plate, lying on the surface of welded sheets, was used. The calculations were done with ANSYS in two phases, thermal and mechanical calculations of deformations and stresses, with non-linear, temperature dependent material properties. Different locations of the hole were used...
The paper presents a developed simulation model for an availability estimation of renewable technical systems characterised by koon reliability structures. The proposed solution allows one to describe the availability of systems consisting of elements whose time-failure and renewal time probability distributions are, e.g., exponential, Weibull, or normal. This is the main advantage of the model. The...
It is necessary to carry out investigations on device behaviour before it will work in real conditions. Helpful tools are CAD systems and numerical simulations on virtual geometric models. They allow relatively cheap and fast analysis of devices without using expensive real models. This paper presents a method of multichannel pipe design with the help of a CAD system in terms of its strength and working...
The paper presents a comparison of the results of fatigue life experimental results on 2017A-T4 aluminium alloy with tests performed under two types of stress, i.e. tensile-compressive (both strain-controlled and energy parameter controlled) and oscillatory bending (bending moment controlled). The results are obtained by applying the Basquin’s stress-life equation and strain-life equations, including...
The paper presents a mobile system dedicated to an industrial manipulator control. For this purpose, an interface was designed to be used for intuitive interaction with a robot, which consists of a measuring scanner for the orientation of the human upper limb, and a glove to measure the deflection of fingers. Basic gestures used for moving the manipulator have been proposed. The paper was based on...
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