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Journal articles on the topic 'Machinery'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 June 2025

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1

Smolyak, S. A. "The Poisson process of machinery degradation: Application to valuation." Journal of the New Economic Association 48, no. 4 (2020): 63–84. http://dx.doi.org/10.31737/2221-2264-2020-48-4-3.

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The machinery degradation process is described by a random process in which failures occur with constant intensity, and with each failure the rate of benefits generated by the machinery item reduces by a random amount. If the machinery item begins to generate negative benefits, it is subject to decommissioning. We get explicit expressions for the average life of the machinery items and the coefficient of variation of the service life. Machine’s value is determined by discounting the flow of benefits from its future use. This allows to link this value with the rate of benefits that the machinery item brings. In cases where there is no information on the amount of such benefits, appraisers rely on the machine’s age. However, different machinery items of the same age may be found in a different condition and therefore are characterized by different values. We offer formulas for calculating the percent good factors reflecting the average decrease in the equipment’s value with age. To take into account the effects of income tax, property tax and inflation, it suffices to adjust the discount rate in the constructed model. It has been verified that the proposed dependencies are in a fairly good agreement with market price data for two different types of construction equipment.

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2

Ji, Leilei, Ramesh K. Agarwal, and Yang Yang. "Design and Optimization of Fluid Machinery, 2nd Edition." Water 17, no. 5 (March 1, 2025): 720. https://doi.org/10.3390/w17050720.

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Fluid machinery is widely used in industrial production, particularly in industries such as chemical engineering, agriculture, and water resources. With the development of industrial society, the application scope of fluid machinery continues to expand, leading to higher demands for its performance. There is an urgent need to develop and manufacture fluid machinery with superior performance, which requires the optimization design of fluid machinery. This must focus on aspects such as flow mechanisms and energy losses, exploring the factors that affect fluid machinery’s performance in order to improve it through the design or modification of the fluid machinery structure. This Special Issue’s primary focus is just that. After a thorough peer review process, 13 articles were accepted for publication. These articles cover the categories of research detailed in the following sections.

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3

Akram, Muhammad Waqar, Nida Akram, Hongshu Wang, Shahla Andleeb, Khalil Ur Rehman, Umair Kashif, and Syed Farhaan Hassan. "Socioeconomics Determinants to Adopt Agricultural Machinery for Sustainable Organic Farming in Pakistan: A Multinomial Probit Model." Sustainability 12, no. 23 (November 24, 2020): 9806. http://dx.doi.org/10.3390/su12239806.

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Urbanization and low productivity are real threats to the sustainability of organic farming. The adoption of farm machinery plays a vital role in overcoming these threats to ensure a sustainable and more profitable organic farming model. Farm machinery can also increase farmland yield and reduce the need for labor, although the requirement of significant capital investment often prevents small farmers from buying machinery. There is an increased need to comprehend all relevant elements associated with farming machinery procurement and service delivery. In this article, we provide insight into the impact of different variables of farmers on the adoption of agricultural equipment. A total of 301 organic farmers were surveyed in three districts of Punjab, Pakistan. It was found that the most common machinery concerned herein are tube-well/pumps, tractors, tillage machinery, and thrashers/harvesters. Results from a multinomial probit estimation showed that farm machinery ownership is positively correlated with capital assets, civil infrastructure, alternative sources of power, and credit facility. The findings indicated that policymakers and stakeholders should not concentrate merely on short term planning, such as improving agricultural machinery’s adoption rate. Still, they should also strive to upgrade physical infrastructure and facilities and provide credit services to create an enabling environment that can empower the citizen in adopting large scale use of agricultural machinery for long term sustainability of organic farming.

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4

Bhatti, Saima, Asif Ali Shaikh, Asif Mansoor, and Ramsha Shaikh. "Extraction and classification of vibration features of rolling element bearing with increasing the rotational speed." Mehran University Research Journal of Engineering and Technology 43, no. 4 (October 1, 2024): 182. http://dx.doi.org/10.22581/muet1982.3281.

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Machinery components degrade over time due to continuous use. A reliable prognosis framework can improve machinery health by monitoring the behavior of its parts and providing warnings before critical failures occur. Bearings, which are essential components of rotating machinery, help maintenance personnel assess the machine’s condition during continuous wear. In this study, vibration data from roller bearings under various conditions and faults were collected. The Vibration analysis technique was employed to detect and classify different faults in bearings based on the characteristics of the vibration signals generated by the machinery. Faults can be detected, diagnosed, and classified by analyzing bearing vibration signatures using techniques such as frequency analysis, time-domain analysis, spectral analysis, and kurtogram classifiers. This enables appropriate maintenance actions to be taken in time, preventing further damage or failures.

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5

Torpy, Janet M. "Machinery." JAMA 308, no. 9 (September 5, 2012): 844. http://dx.doi.org/10.1001/jama.2012.3179.

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6

Ishida, Teruo, and Kazuhide Chikaoka. "Weaving Machinery and its Related Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 15–19. http://dx.doi.org/10.4188/jte1955.36.15.

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7

Chikaoka, Kazuhide, and Toshiyasu Kinari. "Weaving Machinery and its Related Machinery." Journal of the Textile Machinery Society of Japan 40, no. 1 (1994): 19–26. http://dx.doi.org/10.4188/jte1955.40.19.

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8

Liao, W. Z., and Y. Wang. "Dynamic Predictive Maintenance Model Based on Data-Driven Machinery Prognostics Approach." Applied Mechanics and Materials 143-144 (December 2011): 901–6. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.901.

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As an increasing number of manufacturers realize the importance of adopting new maintenance technologies to enable systems to achieve near-zero downtime, machinery prognostics which enables this paradigm shift from traditional fail-and-fix maintenance to a predict-and-prevent paradigm has arose interests from researchers. Machine's condition and degradation estimated by machinery prognostics approach can be used to support predictive maintenance policy. This paper develops a novel data-driven machine prognostics approach to assess machine's health condition and predict machine degradation. With this prognostics information, a predictive maintenance model is constructed to decide machine's maintenance threshold and predictive maintenance cycles number. Through a case study, this predictive maintenance model is verified, and the computational results show that this proposed model is efficient and practical.

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9

Smolyak, Sergey A. "Valuation of Machines with a Random Service Life Based on the System of National Accounts – 2008." Economics of Contemporary Russia, no. 2 (July 5, 2021): 40–57. http://dx.doi.org/10.33293/1609-1442-2021-2(93)-40-57.

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We propose a mathematical model describing the decrease in the market value of machines (depreciation) with age in a situation where its service life is random and has a Weibull distribution. We measure the depreciation of a used machinery item using a goodness factor, that is, the ratio of its value to the value of a similar new machinery item. The model is based on the principle of anticipation of benefits adopted in the valuation theory and the discounting cash flows method. The model takes into account that machine’s technical and economic characteristics deteriorate with age and its benefits are reduced according to the hyperbolic dependence adopted in the system of national accounts SNA‑2008. We have built the dependences of average machine's goodness factor on its relative age (the ratio of the actual age to the average service life). Calculations show that the discount rate and average service life have little effect on these dependencies. This made it possible to divide the machines into three categories and propose for each of them its own dependence of the goodness factor on the relative age, which is convenient for practical use in appraisal activities.

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10

Wang, Li, Yi Qi Zhou, and Zhen Hua Wang. "CFD Research on Aerodynamic Performance of Complicated Resistance Muffler." Applied Mechanics and Materials 34-35 (October 2010): 1274–78. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1274.

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In this paper, a complicated resistance muffler was designed for a construction machinery. Computational Fluid Dynamics (CFD) method with three dimension models was used to explore the aerodynamic performance of the muffler. With this method the pressure distribution in the muffler is simulated and the pressure loss is predicted for the structure modification. The experiment results verify that the assembly performance of the muffler modified is better than the original muffler. The pressure loss and the insert loss of the improved muffler meet the design specifications and standards of the construction machinary. The integrated performance of the construction machinery has been advanced.

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11

MU, Hongyun, Yanlei LUO, and Yu LUO. "Electro-Hydraulic Load-Sensitive Simulation Study of Walking Hy-draulic System of Electric Agricultural Machinery." Mechanics 28, no. 6 (December 5, 2022): 481–89. http://dx.doi.org/10.5755/j02.mech.31470.

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The conventional load-sensitive hydraulic drive chassis system for agricultural machinery uses a combination of engine and load-sensitive pump, which cannot adjust the control strategy according to the working conditions. It does not meet the current trend of energy-saving and emission reduction. To this end, an electro-hydraulic load-sensitive hydraulic drive chassis system for agricultural machinery, which uses a combination of permanent magnet synchronous motor and quantitative pump, is proposed. A variable LS differential pressure control and a variable differential pressure control of the pressure compensation valve to improve agricultural machinery's working performance are proposed. AMESim is used to establish the system simulation model to obtain the system composite motion, variable LS differential pressure control, and variable pressure differential control of the pressure compensation valve performance. The simulation results show that the system achieves the essential functions of a conventional load-sensitive system. The variable LS differential pressure control and the variable pressure differential control of the pressure compensation valve are feasible. They can effectively improve the performance of agricultural machinery to adapt to working conditions. It can effectively reduce the system energy consumption and provide a theoretical basis for the intellectualization of electric agricultural machinery.

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12

Hosokawa, Jyuzo. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 32, no. 3 (1986): 61–66. http://dx.doi.org/10.4188/jte1955.32.61.

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13

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 32, no. 3 (1986): 70–75. http://dx.doi.org/10.4188/jte1955.32.70.

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14

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 19–27. http://dx.doi.org/10.4188/jte1955.36.19.

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15

Hosokawa, Jyuzo. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 8–15. http://dx.doi.org/10.4188/jte1955.36.8.

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16

Hosokawa, Juzo, and Taro Nishimura. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 40, no. 1 (1994): 14–19. http://dx.doi.org/10.4188/jte1955.40.14.

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17

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 40, no. 2 (1994): 39–48. http://dx.doi.org/10.4188/jte1955.40.39.

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18

Nishimura, Taro. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 44, no. 2 (1998): 31–34. http://dx.doi.org/10.4188/jte1955.44.31.

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19

Rudd, Joy, Sheelagh Drudy, Kathleen Lynch, Chris Moffat, David Alvey, Maurice R. O'Connell, Áine Hyland, and Kenneth Milne. "Murder Machinery." Books Ireland, no. 174 (1994): 10. http://dx.doi.org/10.2307/20626828.

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20

Lyon, Richard H. "Machinery diagnostics." Journal of the Acoustical Society of America 84, S1 (November 1988): S168. http://dx.doi.org/10.1121/1.2025947.

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21

Dewrance, John. "MACHINERY BEARINGS." Journal of the American Society for Naval Engineers 9, no. 1 (March 18, 2009): 104–17. http://dx.doi.org/10.1111/j.1559-3584.1897.tb00708.x.

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22

Marchini, G. "Intelligent Machinery." Electronics and Power 33, no. 1 (1987): 71. http://dx.doi.org/10.1049/ep.1987.0043.

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23

Ku, Y. H. "Electric machinery." Journal of the Franklin Institute 319, no. 4 (April 1985): 457. http://dx.doi.org/10.1016/0016-0032(85)90014-6.

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24

Feynman, R. "Infinitesimal machinery." Journal of Microelectromechanical Systems 2, no. 1 (March 1993): 4–14. http://dx.doi.org/10.1109/84.232589.

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25

Ridley, John. "Machinery Directive." Manufacturing Engineer 68, no. 8 (1989): 46. http://dx.doi.org/10.1049/me:19890129.

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26

Fox, Robert. "Romantic machinery." Metascience 23, no. 2 (July 6, 2013): 365–67. http://dx.doi.org/10.1007/s11016-013-9828-9.

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27

Niemeyer, Christof M. "Living machinery." Nature 430, no. 6995 (July 2004): 20. http://dx.doi.org/10.1038/430020a.

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28

Muske, Carol. "Solar Machinery." Missouri Review 9, no. 1 (1985): 19. http://dx.doi.org/10.1353/mis.1985.0137.

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29

Wershler-Henry, Darren. "Literary Machinery." American Book Review 29, no. 3 (2008): 12. http://dx.doi.org/10.1353/abr.2008.0018.

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30

Anderson, Ernest H. B. "TURBINE MACHINERY." Journal of the American Society for Naval Engineers 26, no. 4 (March 18, 2009): 1365–68. http://dx.doi.org/10.1111/j.1559-3584.1914.tb00359.x.

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31

Davey, P. G. "Sensible machinery." International Journal of Advanced Manufacturing Technology 1, no. 3 (May 1986): 1–2. http://dx.doi.org/10.1007/bf02601449.

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32

Stewart, Richard. "MACHINERY ANNUAL." Plastics Engineering 63, no. 12 (December 2007): 18–31. http://dx.doi.org/10.1002/j.1941-9635.2007.tb00247.x.

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33

Dong, Zeng Shou, Yue Jun Hao, Ren Wang Song, and Jian Chao Zeng. "Wireless Data Acquisition Module Design Based on ATmega16." Applied Mechanics and Materials 48-49 (February 2011): 1363–67. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.1363.

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This paper designs a failure signal remote collection terminal based on engineering mechanical hydraulic system. The terminal takes ATmega16 microcontroller as control core, using BenQ M22A module for GPRS wireless transmission. It overcomes region and time limit of engineering machinery and monitors engineering machinery's running status at any real-time, provides the basis for engineering machinery's breakdown service.

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34

Gong, Jiancheng, Xiaoqiang Yang, Fan Pan, Wuqiang Liu, and Fuming Zhou. "An Integrated Fault Diagnosis Method for Rotating Machinery Based on Improved Multivariate Multiscale Amplitude-Aware Permutation Entropy and Uniform Phase Empirical Mode Decomposition." Shock and Vibration 2021 (August 6, 2021): 1–22. http://dx.doi.org/10.1155/2021/2098892.

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Rotating machinery refers to machinery that executes specific functions mainly relying on their rotation. They are widely used in engineering applications. Bearings and gearboxes play a key role in rotating machinery, and their states can directly affect the operation status of the whole rotating machinery. Accurate fault detection and judgment of bearing, gearbox, and other key parts are of great significance to the rotating machinery’s normal operation. A new fault feature extraction algorithm for rotating machinery called Improved Multivariate Multiscale Amplitude-Aware Permutation Entropy (ImvMAAPE) is proposed in this paper, and the application of an improved coarse-grained method in fault feature extraction of multichannel signals is realized in this method. This algorithm is combined with the Uniform Phase Empirical Mode Decomposition (UPEMD) method and the t-distributed Stochastic Neighbor Embedding (t-SNE) method, forming a new time-frequency multiscale feature extraction method. Firstly, the multichannel vibration signals are decomposed adaptively into sets of Intrinsic Mode Functions (IMFs) using UPEMD; then, the IMF components containing the main fault information are screened by correlation analysis to get the reconstructed signals. The ImvMAAPE values of the reconstructed signals are calculated to generate the initial high-dimensional fault features, and the t-SNE method with excellent nonlinear dimensionality reduction performance is then used to reduce the dimensionality of the initial high-dimensional fault feature vectors. Finally, the low dimensional feature vectors with high quality are input to the random forest (RF) classifier to identify and judge the fault types. Experiments were conducted to verify whether this method has higher accuracy and robustness than other methods.

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35

Dogra, Vaishally. "Nonlinear Dynamics and Vibration Analysis of Rotating Machinery." Mathematical Statistician and Engineering Applications 70, no. 1 (January 31, 2021): 527–39. http://dx.doi.org/10.17762/msea.v70i1.2506.

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In a variety of engineering disciplines, including the mechanical, aerospace, and energy industries, the study of nonlinear dynamics and vibration analysis of rotating machinery has become increasingly important. In many applications, including turbines, engines, compressors, and pumps, rotating machinery is essential for both the performance and safety of the entire system. Nonlinearities, on the other hand, add intricate dynamic behaviours and vibration phenomena into these systems, which can result in subpar performance, excessive wear, and even catastrophic failures.The goal of this research is to improve rotating machinery's design, operation, and maintenance by examining the nonlinear dynamics and vibration properties.In order to comprehend the complex interplay between the dynamics of the rotor, the dynamics of the bearing, and the nonlinear forces, the analysis makes use of sophisticated mathematical models and computer tools. To appropriately depict the system's nonlinear behaviour, important factors including rotor imbalance, shaft misalignment, bearing clearance, and non-circular journal shapes are taken into account.The objective of the project is to create reliable techniques for locating and forecasting important vibration modes, resonances, and instabilities in rotating machinery. Techniques like nonlinear time series analysis, bifurcation analysis, and chaos theory are used in this. The results of this study can help in the creation of efficient vibration mitigation plans and condition monitoring tools as well as useful insights into the underlying physics of rotating machinery dynamics. This paper findings may help to increase the performance, reliability, and lifetime of rotating machinery, which would increase operational effectiveness and lower maintenance costs across a range of industrial sectors.

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36

SHIMIZU, Yoshiharu. "Sanitary of Food Machinery : Sanitary of Pumping Food Machinery." Journal of the Society of Mechanical Engineers 92, no. 846 (1989): 446–50. http://dx.doi.org/10.1299/jsmemag.92.846_446.

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37

Temirbaeva, Nazgul, Maksat Sadykov, Zhanarbek Osmonov, Ysman Osmonov, and Urmat Karasartov. "Renewable energy sources in Kyrgyzstan and energy supply to rural consumers." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (July 5, 2024): 22–32. http://dx.doi.org/10.31548/machinery/3.2024.22.

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The study assesses the potential of renewable energy sources in Kyrgyzstan and explores their application to provide energy to rural consumers. This study used an approximation of the parabolic function of solar radiation change, statistical processing of data on the average annual water flow of small rivers, as well as calculation of the volume of manure produced and its processing into biogas and bio fertilisers to assess their potential in agriculture and environmental impact. Kyrgyzstan, located between 40 and 68° north latitude, has evenly distributed solar radiation, small rivers and biomass, which have significant renewable resources. The distribution of solar radiation on the territory corresponds to the normal law of the monthly average mathematical expectation of 175.79 kWh/(m²*month) and a standard deviation of 92.44 kWh/(m²*month). On average, each square metre of a solar power plant can produce 0.451 kWh of energy. The intervals of average water discharge between the small rivers of Kyrgyzstan follow a power law distribution with a mathematical expectation of 3.112 m³/s and a standard deviation of 2.46 m³/s. With a natural water flow rate of 0.652 m³/s, a low-pressure micro-hydroelectric power plant (with a water head of 1 to 2 m) can generate up to 8.95 kW of power. The total consumption of biogas by an average farm in Kyrgyzstan and its consumption for heating raw materials in a bioreactor during the cold season ranges from 16.34 to 18.93 kg/hour. This demand for biogas is met by producing domestic feedstock (animal manure) using compact biogas plants with reactors of up to 20 m³. These facts indicate that the use of the above-mentioned renewable energy sources in Kyrgyzstan can provide autonomous power supply to remote rural consumers and contribute to solving existing environmental problems, as well as energy-saving

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38

Кulinchenko, Heorhii, Andrii Panych, Andrii Masliennikov, and Petro Leontiev. "Research of the regulator of an expander-generator unit." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (June 3, 2024): 33–46. http://dx.doi.org/10.31548/machinery/3.2024.33.

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The relevance of research is determined by the tasks of increasing the efficiency of alternative and renewable energy power plants. The purpose of the work is to develop a method of coordinating the settings of the automatic excitation regulators and the speed of rotation of the rotor of the generator from the vortex installation of the expander-generator unit, which is part of the autonomous power consumption network. To achieve the goal, the methods of mathematical modelling in the MATLAB environment, physical modelling, processing of experimental data, theory of automatic control, theory of magnetic field, theory of electric machines, programming of microprocessor devices were used. Considering the need to expand the base of alternative energy sources, the task of controlling the energy plant for the utilization of excess pressure of gas transportation networks was considered. The study of the regulator of the expander-generator unit was based on a model reflecting the interaction of mechanical and electrical processes. A set of nonlinear differential equations corresponded to the description of these processes. Accurate consideration of nonlinearities of the considered control object complicates the implementation of the corresponding microprocessor control systems. Modelling is aimed at achieving a compromise between the required accuracy of object control and the possibilities of simplifying the object control structure. The use of experimental and datasheet data of the devices made it possible to evaluate the dynamics of turbine rotation and voltage generation, forming the factors for the untying of the control circuits. The use of MATLAB with the Lookup Table option made it possible to perform a multi-point linearization of the nonlinear description of the process, speeding up the modelling and adjustment of the regulator. This is important to incoordinate the settings of the frequency control loops and the output voltage, given the trade-off between the speed of the regulator and the minimization of oscillations in the generation frequency. Based on the obtained results, a regulator of the expander-generator unit was developed, which ensures the stabilization of the initial parameters of the unit under the conditions of electrical load disturbances. In practice, the obtained data can be used in the integration of renewable energy sources into the general energy system through the optimization of the operation of generators

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39

Aliiev, Elchyn, and Hennadii Tesliuk. "Analytical justifications of constructive parameters of bionic colters for vertical soil treatment." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (July 10, 2024): 129–39. http://dx.doi.org/10.31548/machinery/3.2024.129.

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Bionic coulters imitate natural forms and functions, which help reduce energy costs for soil tillage. The aim of the research was to justify the design and structural parameters of turbo discs (coulters) for vertical tillage based on the principles of bionic reverse engineering. Using this method, an equation for the shape of the turbo discs (coulters) was derived, which was obtained by approximating the shell of the argonaut (Argonauta argo). The equation takes into account the main structural parameters of the turbo discs: diameter Dd, cutout height Hm, wave height Hw, number of cutouts n, and spiral coefficient k. As a result of analytical studies on the interaction process between a solid disc and plant residues, the optimal diameter value was determined to be Dd=460 mm under the condition of submerging stems with a thickness of 10-20 mm to a depth of 80 mm. The analytical studies confirmed that the presence of cutouts on the disc prevents stem deflection and ensures better stem capture. In analysing the obtained dependencies using the Wolfram Cloud software package, the optimal values for the cutouts were determined: cutout height Hm=40 mm, number of cutouts n=8. The presence of waves on the disc surface ensures that the interaction with plant residues is independent of their position on the field surface and creates conditions for vertical soil tillage. It was found that, to minimize specific cutting resistance and maximize the degree of soil fragmentation, the optimal wave parameters for the coulter are a wave height of Hw=24.4 mm. The justified parameters of the coulters provide the best balance between soil fragmentation efficiency and reduction in energy consumption for soil tillage. The obtained results can be used to adapt existing agricultural machinery to the new structural parameters of coulters to improve its efficiency.

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40

Kresan, Тetiana, Ali Kadhim Ahmed, Serhii Pylypaka, Tatiana Volina, and Taras Voloshko. "Construction of the working surfaces of the tillage screw body from the compartments of the developable helicoid." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (June 28, 2024): 9–21. http://dx.doi.org/10.31548/machinery/3.2024.09.

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Improvement of the screw working bodies for surface tillage is important for increasing the efficiency and quality of agricultural work. The purpose of the work was to calculate the design of the screw a working body for the surface cultivation of the soil from the compartment of the developable helicoid, which would perform the technological process with minimal resistance to plunging in the soil. The surface theory, analytical, and differential geometry were used to design the working body. It is shown in the paper that through a given spiral line, which is the cutting edge of the surface (blade), it is possible to draw developable helicoids with different inclinations of rectilinear generators. Designing the surface for the best plunging into the soil is important. It is established that the proposed working body is an alternative to the existing disc-type tools. It has been proven that for a long time, spherical discs for surface cultivation of the soil were fixed on a common shaft, which was installed on the unit with a certain angle between its axis and the direction of movement of the unit, which contributed to the plunging of the discs in the soil. It is confirmed that the disc-type tillage implements were improved, but this complicated the design of the unit since each disc received an individual axis of rotation. Studies have shown that this made it possible to additionally set the roll angle, that is, the deviation of the plane of the disc blade from the vertical direction, which improved the plunging of the disc in the soil and ensured more effective turning and mixing of plant residues. The proposed screw working body combines the simplicity of the design of the common shaft and the presence of the angle of attack and roll, which confirms its effectiveness in comparison with existing analogs. The necessary calculations were made, and the surfaces of the right and left courses were constructed with the designation of the necessary structural parameters. The application of the obtained results can simplify the design of the soil processing unit

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41

Sadovoy, Oleksiy, Vasyl Hruban, Mekhailo Fedorchuk, and Valentyna Fedorchuk. "Optimisation of solar power plant parameters for use in sprinklers in Southern Ukraine." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (July 19, 2024): 117–28. http://dx.doi.org/10.31548/machinery/3.2024.117.

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The study aimed to assess the effectiveness of integrating solar power plants into sprinklers in the Mykolaiv region. Modelling methods, practical tests and analysis of system efficiency were used to optimise the parameters of a solar power plant in the South of Ukraine. The results showed that for sprinklers in this region, a solar power plant should have sufficient capacity to meet the energy needs without significantly increasing the weight of the equipment. The most effective solution was to place the solar panels near the Zimmatic-354M machine, which ensures maximum solar energy production. The analysis showed that the use of batteries allows for uninterrupted operation of the system even with partial shading. Field tests confirmed the theoretical findings and revealed the need to improve the materials of the panels to increase their durability and resistance to dust and temperature fluctuations. Improvements to the design and use of new materials are recommended to increase the efficiency of the system in specific climatic conditions. The study also determined that the integration of solar panels into sprinklers would not adversely affect their manoeuvrability and stability. The results showed that the energy system, designed to meet the specific climatic conditions of southern Ukraine, can ensure the stable operation of sprinklers for a long time. In addition, the study revealed the need for regular maintenance of the panels to maintain their efficiency at the optimum level

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Kravets, Taras, Mykhailo Semerak, Igor Galyanchuk, Oksana Yurasova, and Andrii Kharchuk. "Analytical study on improving the efficiency and environmental friendliness of solid organic fuels." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (July 12, 2024): 84–93. http://dx.doi.org/10.31548/machinery/3.2024.84.

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The purpose of this study was to analyse methods of increasing the efficiency and environmental friendliness of the use of solid organic fuels (SOF) in electricity generation. This study employed a comprehensive approach to the analysis and optimisation of technological processes, operational systems, and environmental aspects of the use of SOF. The study found that the use of modern technologies, such as gasification and pyrolysis, considerably increases the efficiency of converting SOF into electricity. Optimisation of boiler and turbine designs and automation of fuel supply systems helps to reduce energy losses and improve overall system efficiency. It was found that the use of new materials for boilers increases their resistance to corrosion and erosion, which extends the service life of the equipment. The study also showed that the introduction of gas cleaning and secondary combustion systems significantly reduces emissions of harmful substances, which improves environmental performance. An analysis of ash utilisation opportunities showed that its use as a fertiliser or construction material is a promising area. The study proved that an integrated approach to the use of SOF can substantially increase their efficiency and environmental friendliness. The findings of the study suggest that the use of innovative methods of combustion process control allows achieving more stable and efficient power generation. It was proved that the introduction of automated monitoring and control systems reduces operating costs and increases the reliability of equipment. The study also found that the use of advanced analytical tools to predict equipment wear and tear allows for prompt preventive maintenance, which further increases the efficiency and duration of uninterrupted operation of energy systems

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Gai, Oleksandr, Oleksandr Novoseltsev, Anton Vorushylo, Olga Khomyak, and Hanna Gai. "Features of multi-agent evaluation of of microgrid systems efficiency in parallel operation with the power system according to the reliability criterion." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (May 30, 2024): 73–83. http://dx.doi.org/10.31548/machinery/3.2024.73.

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Ensuring reliable electricity supply to consumers in the face of destruction of critical energy infrastructure and shortage of generating capacities in Ukraine requires the development of distribution systems and their management systems. The purpose of the study was to substantiate the development of models for ensuring the optimal structure of electrical distribution networks under the conditions of connecting micro-networks according to the reliability criterion in conditions of limited investments. The paper uses a method for assessing the structural reliability of complex electrical systems with microgrid structures and forms a rational power distribution of such structures according to the criterion of optimising the reliability indicators of the studied electric power system. A mathematical optimisation model based on a computational system was proposed, designed to solve non-convex problems with minimising integral reliability indicators, considering financial constraints and the investment efficiency curve. Based on the research, the possibilities of optimisation using the BARON solver available on the NEOS server were examined. The results of the model’s performance are demonstrated using examples, considering the parameters of distribution system objects and their limitations on network components. An algorithm and programme for solving the problem of targeting power flows of microgrid structures in multi-node regional power systems are proposed. Algorithms and scenarios for the response of dispatching services are developed, provided that investments are limited, which will ensure the survivability of the power system as a whole. It is established that the development of rational electricity flows of microgrid structures will minimise the under-supply of electric energy by specific load nodes and determine their shares in covering the demand of the energy island in conditions of power shortage. The findings can be used in the operational management of power systems

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Abilov, Rashad Saffan. "Research and improvement of the design of a sedimentation tank for hydropower and irrigation." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (June 24, 2024): 60–72. http://dx.doi.org/10.31548/machinery/3.2024.60.

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The study is devoted to the analysis and optimisation of the design of the sedimentation tank to increase the efficiency of settling solid particles in hydropower and irrigation systems. Both experimental and numerical methods were used to analyse and optimise the design of sedimentation tanks to increase their efficiency in hydropower and irrigation systems. The study examined and analysed various types of sedimentation tanks according to design schemes, flow regime, deposition dynamics and sediment flushing methods, and also considered recommended improvements for hydropower and irrigation of various types of sedimentation tanks. During the study, it was revealed that optimising the geometry of the sedimentation tank significantly increases the efficiency of solid particle deposition. Experimental data have shown that changing the angle of inclination of the walls and increasing the area of the bottom of the sedimentation tank contribute to improving the deposition of silt and sand. It has also been found that the use of special turbulent inserts reduces the particle deposition time and improves the quality of treated water. Hydraulic flow modelling has confirmed that a more uniform velocity distribution in the sedimentation tank reduces turbulence and promotes more efficient particle deposition. The introduction of automated systems for monitoring and controlling the cleaning process has made it possible to increase the reliability and stability of the sedimentation tank. As a result, it was proved that the proposed design and technological changes can significantly increase the efficiency and durability of sedimentation tanks in hydropower and irrigation. The study provides practical recommendations for improving the design of sedimentation tanks, which helps to increase their efficiency and reliability in hydropower and irrigation, thereby improving water management

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Mikhailova, Lyudmyla, Olga Zavytii, Mykola Horlachuk, Dariia Vilchinska, and Oleh Kondratiuk. "Search for innovative solutions to improve the energy system of Ukraine: World experience." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (June 7, 2024): 103–16. http://dx.doi.org/10.31548/machinery/3.2024.103.

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This study analyses the global experience of introducing innovations in the energy sector to identify effective solutions that can be applied to improve the energy system of Ukraine. The research methods included a comparative analysis of international experience in the energy sector, an assessment of the possibilities of adapting innovative technologies to Ukrainian conditions, and an examination of technical and economic aspects of integrating new solutions. The study analysed the experience of countries such as Germany, Denmark, the United States, Finland, the Netherlands, Sweden, Japan, China, France, and South Korea, which have succeeded in implementing innovative solutions in the energy sector, in particular, in the integration of renewable energy sources (RES), the development of smart networks, energy decentralisation, energy storage technologies, and energy efficiency improvement. It is identified that the most efficient approaches include the integrated use of renewable energy sources in combination with energy storage, which ensures the stability of energy supply even in conditions of uneven electricity production. The importance of smart networks for optimising energy distribution and reducing losses is also emphasised. The decentralisation of energy and the development of energy cooperatives contribute to improving energy security and community engagement. The study also showed that the introduction of smart energy management systems at the consumer level helps to increase the flexibility of the energy system and effectively respond to fluctuations in demand. In addition, it is determined that the successful implementation of innovative projects in the energy sector requires state support through subsidies and regulatory incentives. Based on international experience, it is concluded that combining technical solutions with effective management and political initiatives is key to ensuring the sustainable development of the Ukrainian energy system

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Romasevych, Yuriy, Viatcheslav Loveikin, and Viktor Krushelnytskyi. "Comparative study of PI-controller and neurocontroller performances in optimal by settling time control problems." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (July 3, 2024): 94–102. http://dx.doi.org/10.31548/machinery/3.2024.94.

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When developing control systems, an important issue arises of choosing an operator, which forms the control function. The standard approach is to use a PI- or PID-controller, a more advanced approach involves ANNs training for this purpose. A comparative analysis of the PI- and neurocontroller performances makes it possible to establish the disadvantages and advantages of each of the compared controllers, which is an important scientific and applied problem. The purpose of the work was to conduct a comparative analysis of the performance of the PI-controller and the neurocontroller based on a set of evaluation indicators for plants of the second and third orders. Such a comparison was carried out by using an approach to the synthesis of both controllers, which involved the minimization of a complex objective function. The latter is obtained as a result of reducing the problem of optimal control with constraints to the problem of unconstrained optimization. The analysis showed that according to the settling time indicator (optimization criterion), the neurocontroller has an advantage of 6.1...96.2% for the modelled plants. At the same time, according to other indicators of the control quality, the PI-controller has an advantage. In addition, the synthesis of a neurocontroller in terms of finding the minimum of the objective function is a more difficult problem. For its solution, a bigger number of iterations of the VCT-PSO optimization algorithm is required. It is rationally to set more than 1000 iterations and swarm population in the range 30…50 particles. A comparative analysis by the settling time of the neurocontroller and PI-controller, which is tuned according to engineering methods, showed significant reserves for improving this indicator. Thus, if the requirements for settling time minimization are quite strict, then it is advisable to use a neurocontroller. The obtained results will make it possible to develop recommendations for the rational choice of the control operator when solving practical problems of the control systems synthesis

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Askaraliev, Bakytbek, Kasiet Musabaeva, Baratali Koshmatov, Kanat Omurzakov, and Zhyparkul Dzhakshylykova. "Development of modern irrigation systems for improving efficiency, reducing water consumption and increasing yields." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (June 18, 2024): 47–59. http://dx.doi.org/10.31548/machinery/3.2024.47.

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The study was conducted to examine modern irrigation systems aimed at improving water efficiency, reducing water consumption and increasing crop yields. The study analysed the environmental and socio-economic aspects of modern irrigation systems, including their impact on the environment and social sustainability of agriculture. The study determined that the use of modern irrigation systems, such as drip irrigation and IoT-based automatic control systems, can significantly improve the efficiency of water use in agriculture. Data analysis demonstrated that such systems can reduce water consumption by up to 50% while increasing yields by up to 30%. The use of agricultural drones to monitor field conditions and precisely regulate irrigation helps to improve plant health and reduce labour costs. The study also determined that water recycling and reuse systems can significantly reduce the use of freshwater, which is especially important in regions with limited water resources. In general, modern irrigation technologies demonstrate high efficiency and economic feasibility, contributing to the sustainable development of agriculture. The study proved that the use of computer modelling and forecasting of plant water requirements provides optimal conditions for their growth, which further contributes to an increase in yields. The results of the study can be used in practice to develop and implement more efficient and environmentally friendly technologies in irrigation and drainage systems, which helps to reduce the negative impact on the environment through more efficient use of water resources and reduction of water runoff

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Slavinskyi, Dmytro, Tamara Bilko, Yury Cheberyachko, Sergij Vambol, and Olena Yavorska. "Research of the influence of filter element resistance on the powered air-purifying respirator service life." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (October 16, 2024): 34–46. https://doi.org/10.31548/machinery/4.2024.34.

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The purpose of the research was to determine the influence of the increasing resistance of filter elements on the service life of powered air-purifying respirators during operation in mining conditions and to substantiate the parameters of the respirator power source. The research was conducted by the computer-based simulation methods for the powered air-purifying respirator operation, which allows estimating the additional resistance of the filter caused by dust accumulation. The simulation model of the powered air-purifying respirator was developed on the basis of its physical model and, taking into account the empirical dependence of the change in the filter element resistance during dust deposition, allows determining the flow of air through the filter and the dust aerosol concentration in the working area air. The following parameters of the simulation model of a powered air-purifying respirator were substantiated: controlling action – fan rotating speed, restrictions on air flow and air pressure in the respirator mask (depending on the mode of working arrangements of the user), concentration of dust in the air of the working area, capacity of the power source, power consumption of the electric motor of the fan and control system components, parameters of filter elements (fibre packing density, filter layer thickness, fibre diameter, etc.), input concentration of dust aerosol, which made it possible to establish the relationship between the value of the filter element resistance and the time to complete discharge of the power source. A critical value of the resistance of the filter elements of the powered air-purifying respirator was established, which results in a significant discharge of the power source, based on the different flow rate of the air supplied to the undermask space at a given dust concentration in the working area. Relationship between the change in breathing resistance of the filters and the discharge of the power source was established, which allows determining the period of safe operation of the powered air-purifying respirator, based on the concentration of dust in the working area air and the user’s working arrangement. The practical value involves determining the lifespan of the powered air-purifying respirator, based on the critical value of the filter resistance, which results in the rapid discharge of the power source

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Zavodyannyi, Viktor, Mykola Voloshyn, Volodymyr Kravchenko, Valentina Zubenko, and Roman Zhesan. "Experimental study of heat exchangers and mixing machines operation optimisation methods." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (October 11, 2024): 82–93. https://doi.org/10.31548/machinery/4.2024.82.

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The study aimed to optimise the operation of heat exchangers and mixing machines to improve the efficiency of production processes. An experimental approach with models that describe the processes of heat transfer, hydraulic resistance and mixture homogeneity was used to determine the optimal equipment parameters. The study showed that optimisation of the operation of heat exchangers can lead to a significant increase in energy efficiency and a reduction in operating costs. The best results were achieved at a coolant temperature of 90°C and a pressure of 5 bar, which resulted in a maximum heat transfer of 350,000 W. The study determined that reducing the hydraulic resistance to the optimum level can reduce energy costs for pumping coolant by 15%. The study also showed that to achieve maximum homogeneity of the mixture in mixing machines, the optimal rotation speed is 400 rpm. This resulted in a mixture homogeneity index of 16. The study determined that the temperature of the components fed into the mixing machines has a significant impact on the final product quality. For example, the optimum temperature for certain components had reduced mixing time by 10%, which had contributed to an increase in overall productivity. The integration of automatic control systems, such as the automatic control system, allowed for real-time monitoring and adjustment of equipment parameters, which further increased the efficiency of production processes. In addition, the study determined that comprehensive optimisation of the parameters of the devices’ operation allows for an increase in the duration of their life cycle, reducing the frequency of maintenance by 20%. Optimisation of the operation of heat exchangers and mixing machines significantly increases production efficiency and the quality of final products, contributing to cost reduction and increasing equipment reliability

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Dovhal, Artem, and Yulian Tuz. "Methods of high voltage generation by cascading amplifiers." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (October 8, 2024): 106–17. https://doi.org/10.31548/machinery/4.2024.106.

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The purpose of this study was to create a new model of a high-voltage measuring amplifier that would include several stages of operational amplifiers to increase the operating voltage range by sequentially “virtual” connecting the output voltages of each stage. The research methodology included the use of cascaded amplifier coupling, an additive error correction scheme, as well as modelling and computational studies to optimise the design of high-voltage operational amplifiers. The study results showed that the use of high-voltage operational amplifiers RA94 provides high stability and accuracy of the output signal even under variable loads. The cascaded connection of the amplifiers helped to expand the frequency range and increase the operating voltage, which increased their efficiency. The use of an additive error correction scheme significantly reduced signal distortion, improving its quality. Modelling and computational studies optimised the design of the amplifiers, which contributed to the achievement of high technical characteristics. By combining these methods, a reliable system with improved parameters was created. The amplifiers have shown promise for a wide range of industrial and scientific applications. They can operate in difficult conditions with high accuracy. The study confirmed the importance of integrating modern technologies into the development of electronic systems. Computational studies of a new model of a high-voltage measuring amplifier demonstrate that the use of several stages of operational amplifiers together with an additive error correction scheme can significantly expand the frequency range of the amplifier and increase the operating voltage range, which leads to improved measurement quality

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