Diamond Like Carbon (DLC) with both sp3- and sp2-bonded carbon in DLC coatings is equipped with superior mechanical, tribological, electrical, and optical qualities. Depending on their composition and synthesis method, DLC films can be amorphous, hard, or strong. High residual stress in the film, however, limits its potential uses in many fields and results in poor adherence to the substrate materials. (…)
In machining technology, increasing tool life is crucial for reducing manufacturing costs. One possible method to extend tool life is cryogenic heat treatment, which can improve the wear resistance of cutting tools. This publication investigates the effect of soaking time in liquid nitrogen (8, 16, and 24 hours) and tempering temperature (200 and 550 °C) on the hardness and run-out of the tool material. (…)
This paper investigates the mechanical properties of products manufactured using Fused Deposition Modeling (FDM) technology from additively reinforced polylactic acid (PLA) materials. With the growing popularity of 3D printing technology, it is necessary to increase and improve the performance of PLA, which is known for its brittleness and limited durability. The aim of this study is to analyze the infl (…)
The aim of this work is to investigate anti-reflective coatings for surface matting and their effect on optical sensing accuracy. In the experimental part, the thickness of the coatings is analyzed on samples with different surface roughness levels: Ra 0.2, Ra 1.7, and Ra 3.1. The samples were milled from C45 steel. Seven types of matting sprays (sublimation and permanent) were tested. The results show (…)
The paper presents the integration of digital twins into industrial processes using the Asset Administration Shell (AAS) standard. The research describes the basic concept of implementing the AAS standard for industrial data collection from selected automation devices. The core component of data collection is the AAS server, which serves as a bridge between the real process and data visualization. Real (…)
The high usage rates of mobile phones and their short lifecycles are leading to a great and increasing amount of electronic waste (e-waste) globally, with a negative impact on the environment. This trend can also be seen in Cambodia, a developing country in Southeast Asia. Circular strategies, such as the refurbishment of used mobile phones and bringing them back to the market ‘as good as new’, are esta (…)
Industrial washing and cleaning of the components is an integral part of the business with the refurbished parts. The cleaning quality of the refurbished parts must be at the high level. One such technique for cleaning the components is the method of wet blasting using the chemicals at a certain temperature. Such process can be balanced by changes in the concentration of the chemical, the abrasive used (…)
Gauge blocks are materialized dimensions that are used exclusively for the calibration of length gauges. Every measuring workplace where length dimensions are measured should have its own gauge block set for internal calibration and verification of its length gauges. But even these gauge blocks must be calibrated using a suitable methodology. This article attempts a methodology for the internal calibrat (…)
The article deals with the design of a two-wheeled mobile robot with differential wheel control to achieve higher maneuverability. The speed and direction of movement are controlled using the difference in speed of both wheels. The robots are designed as game robots for educational purposes for students and future students in training and experiments oriented to control and navigation methods in mobile (…)
In recent years, soft robotics has emerged as a key area of research in modern robotics. Among structural solutions, robotic arms play a key role. From the perspective of actuation, soft arms can be classified into two main types: cable-driven and pressure-driven arms. The latter often utilize pneumatic artificial muscles, whose characteristics — such as hysteresis and high degrees of freedom—make tradi (…)
Machine vision has experienced unprecedented growth in recent years, with its deployment aimed at accelerating inspection, technological and other industrial tasks. By utilising compact camera solutions, we can now meet a wide range of practical and end-customer requirements relatively easily and, above all, effectively. In this article, we, therefore, aim to design and verify a selected camera system (…)
Hydrogen represents a promising low-carbon fuel that enables the decarbonisation of transportation without the need for a radical replacement of the piston combustion engines. The presented study analyses the influence of adding hydrogen to the intake air in a turbocharged spark-ignition engine, focusing on fuel combustion process and on gaseous pollutant emissions. The experimental part of this work wa (…)
This paper presents a comprehensive study of system identification of an unmanned aerial vehicle (UAV) of an airplane type based on experimental data collected during longitudinal flight. The study focuses on identifying and deriving mathematical models of the UAV in the pitch control channel without feedback or controllers. Using MATLAB System Identification Toolbox, linear mathematical models are deve (…)
The paper describes the concept of improving the efficiency of the process of diagnostics and monitoring of the technical condition of the electric drive on the basis of brushless direct current (BLDC) motors of robots and vehicles on the basis of analysing diagnostic information of different physical nature, taking into account different types of diagnostic signals formed by individual elements of the (…)
The article deals with the design and implementation of a "compliant" gripping effector using additive FDM technology. It focuses on the possibilities of using flexible mechanisms that work on the principle of bending deformation instead of classic joints. As part of the solution, two effector prototypes were designed, made of PLA and PET-G materials, which were subsequently tested in terms of applied f (…)
Collaborative robots play an important role in production, assembly, operating systems, and can be used in many automation tasks. Due to the repetitive nature of robot actions, the overall efficiency of the production system is mainly determined by the precision of the robot's movement. This study proposes the optimization of robotic path planning relied on its digital twin combined with the A* algorith (…)
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