https://er.chdtu.edu.ua/handle/ChSTU/1 Sat, 12 Sep 2026 15:55:07 GMT 2026-09-12T15:55:07Z https://er.chdtu.edu.ua/handle/ChSTU/9989 Title: Controlled two-sided convective-beam grain drying system Authors: Tkachenko, Maksym; Halchenko, Volodymyr; Ткаченко, Максим Юрійович; Гальченко, Володимир Якович Abstract: The system works on the principle of "layer-by-layer": intense short warm-ups on both sides alternate with pauses of thermal equilibrium and blowing, which reduces temperature and humidity unevenness in the grain thickness. For feedback, radiofrequency (dielectric) estimation of flow humidity and infrared non-contact surface temperature measurement are used. The logic of mode control, the selection of sensors and safety requirements are described. Comparative analysis shows a reduction in drying time and specific energy consumption compared to traditional convection, while reducing the risk of cracking and overheating. The practical aspects of integrating the system into small-sized and modular post-assembly lines are considered. The compliance of the approach with modern trends in intelligent drying control is shown. Wed, 01 Jan 2025 00:00:00 GMT https://er.chdtu.edu.ua/handle/ChSTU/9989 2025-01-01T00:00:00Z https://er.chdtu.edu.ua/handle/ChSTU/9988 Title: Wear control of high-precision sliding electrical contacts in low-speed applications Authors: Fai, Vladyslav; Halchenko, Volodymyr; Фай, Владислав Анатолійович; Гальченко, Володимир Якович Abstract: The article discusses approaches to increasing the durability and stability of electrical parameters of precision low-speed sliding contacts. The purpose of the work is to reduce wear and transient resistance while providing the required friction moment by optimizing coatings and the technology of their formation. The use of electrochemical gilding with alloying and nickel sublayer, as well as the procedure for running-in of the surface, is proposed; a test scheme is given (brush-ring bench, friction machine SRV) and evaluation criteria. It is shown that the correct selection of the composition and thickness of the coating layers, as well as treatment after application, can reduce the intensity of wear and stabilize contact resistance in operating modes. The results can be applied in current collectors of gyroscopic and other mechano-electrical devices Wed, 01 Jan 2025 00:00:00 GMT https://er.chdtu.edu.ua/handle/ChSTU/9988 2025-01-01T00:00:00Z https://er.chdtu.edu.ua/handle/ChSTU/9987 Title: Development and research of a combined 3D scanner with precise determination of the geometry of dark and transparent objects Authors: Cherednychenko, Vitalii; Halchenko, Volodymyr; Чередніченко, Віталій Богданович; Гальченко, Володимир Якович Abstract: The architecture of a combined non-contact 3D scanner is proposed, which combines structured lighting, polarization imaging and an auxiliary depth channel (ToF/stereo) for reliable measurement of complex surfaces – superblack, shiny and transparent. A consistent sequence of calibrations, channel matching algorithms and glare screening, as well as rules for switching modes to the material and scene conditions are described. It is shown that the use of cross-polarization and multi-turn phase Depth safety coding increases the stability of phase deployment and reduces errors in high-contrast areas. An example of hardware configuration and a table of recommended modes for typical materials are given. The solution is focused on engineering metrology, restoration of cultural heritage and quality control of glass and polycarbonate products, where standard methods fail due to pixel saturation or refraction Wed, 01 Jan 2025 00:00:00 GMT https://er.chdtu.edu.ua/handle/ChSTU/9987 2025-01-01T00:00:00Z https://er.chdtu.edu.ua/handle/ChSTU/9986 Title: Automated measuring stand for spacecraft control. Authors: Rotayenko, Vitaly; Tuz, Vyacheslav; Trembovetska, Ruslana; Ротаєнко, Віталій Сергійович; Туз, Вячеслав Валерійович; Трембовецька, Руслана Володимирівна Abstract: The aim of the work is to increase the level of metrological support for automated measurement and computation complexes for mass geometry parameters (MGP) of spacecraft (SC) by combining the measurements of mass, center of mass (CM) position, and components of the tensor of inertia (TI) on a single piece of equipment. The problem of high cost, low unification, and high operational expenses of traditional separate-base test benches is being solved. A combined scheme is proposed, which integrates the method of forced balancing in an unstable position for measuring static MGP and the physical pendulum method with an elastic coupling for dynamic MGP. The key innovation is the replacement of expensive aerostatic bearings with standard rolling bearings, incorporating a developed system for active compensation of dissipative forces (friction)]. An experimental prototype of the "AMIK" test bench confirmed the achievement of high accuracy indicators, equivalent to those of separate-base benches. Key words: mass geometry parameters (MGP), spac Wed, 01 Jan 2025 00:00:00 GMT https://er.chdtu.edu.ua/handle/ChSTU/9986 2025-01-01T00:00:00Z