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Journal articles on the topic 'Variable load conditions'

Author: Grafiati

Published: 25 May 2024

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1

Almeida, K. C., and R. Salgado. "Optimal power flow solutions under variable load conditions." IEEE Transactions on Power Systems 15, no. 4 (2000): 1204–11. http://dx.doi.org/10.1109/59.898091.

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2

SHAO, Yimin. "Gearbox Deterioration Detection under Steady State, Variable Load, and Variable Speed Conditions." Chinese Journal of Mechanical Engineering 22, no. 02 (2009): 256. http://dx.doi.org/10.3901/cjme.2009.02.256.

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3

Zhao, Haoyang. "Classical PID Control of A Quadcopter UAV Under Variable Load Conditions." Academic Journal of Science and Technology 9, no. 2 (2024): 44–46. http://dx.doi.org/10.54097/13m5xg10.

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In recent years, the application of UAVs has become more and more extensive, resulting in a number of special operation UAVs. Quadrotor aerial robots have become one of the most popular vehicles at home and abroad because of their small size, light weight, simple structure, low cost, low requirements for takeoff and landing, and good maneuverability. UAVs are required to perform different tasks in the current complex environment, so variable loads are inevitable, and the stability of the UAV body is especially important when performing variable loads, and there are many ways to help and verify

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4

Lukasik, Konstanty, Jerome Cheron, Gustavo Avolio, et al. "Uncertainty in Large-Signal Measurements Under Variable Load Conditions." IEEE Transactions on Microwave Theory and Techniques 68, no. 8 (2020): 3532–46. http://dx.doi.org/10.1109/tmtt.2020.2995618.

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5

Pollock, H. "Simple constant frequency constant current load-resonant power supply under variable load conditions." Electronics Letters 33, no. 18 (1997): 1505. http://dx.doi.org/10.1049/el:19971063.

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6

Alwadie, Abdullah. "A Real Time Condition Monitoring System for Gears Operating under Variable Load Conditions." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 2 (2018): 493. http://dx.doi.org/10.11591/ijeecs.v9.i2.pp493-501.

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Gears are important component of the rotational power transmission system and are largely used in variable load and speed applications. The faults on the gear generate excessive vibration which leads to breakdown of the machine. Sensor based methods could diagnose gear faults but proved to be expensive and have limited applications due to heavy cost and need of access of gear box for sensor installation. The motor stator current analysis has been reported to overcome the drawbacks of the sensor based fault detection methods. However, motor stator current analysis has a limited capability for r

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7

Gao, Changlun, Junliang Huo, Zhantong Li, et al. "Research and Development of Gearbox Load Spectrum Database under Variable Working Conditions." International Journal of Emerging Technology and Advanced Engineering 11, no. 10 (2021): 29–39. http://dx.doi.org/10.46338/ijetae1021_04.

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Gearbox load spectrum is the data basis for gearbox fatigue life prediction and strength verification. As the amount of load spectrum data increases exponentially and the demand for sharing increases, it is necessary to introduce database technology to store and manage load spectrum data. In this paper, the collection and processing of load data and the compilation of load spectrum are introduced in turns firstly. Then it sums the development and research status of database technology and the technical route of combining load spectrum database up secondly. Moreover, the current status of load

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8

Chen, Chong Liang, Li Guo Liu, and Zi Feng Ni. "The Wear Mechanism of DLC Films at Variable Working Conditions." Advanced Materials Research 199-200 (February 2011): 683–88. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.683.

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The Diamond-like carbon coating (DLC) was derived by the PVCD method on the 45 steel surfaces. The frictional properties and fatigue failure of 45 steel with the DLC films were investigated under three different conditions including full contact condition, horizontal reciprocating movements and vertical reciprocating movements. It was found that (a) at full contact conditions: the increase in the load leads to the initial decrease in the frictional coefficient and then increase, and a lowest frictional coefficient of 0.205 appears at 250N; (b) at horizontal reciprocating conditions: the slow d

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Akhtulov, A. L., O. M. Kirasirov, and M. O. Kirasirov. "Features of calculation of steel structures of bridge cranes at variable loads." MATEC Web of Conferences 298 (2019): 00032. http://dx.doi.org/10.1051/matecconf/201929800032.

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The article deals with the calculation of metal bridge cranes operating under the influence of variable loads. Requirements to static and dynamic characteristics of mechanisms of load-lifting cranes are caused by specifics of work, features of a design and operating conditions of the cranes working at variable loadings. Thus, it is proposed to perform calculations of parts of crane mechanisms for endurance, operating under non-stationary variable load, based on the principle of linear summation of damage, allowing the calculation from the point of view of the load equivalent to the entire rang

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Liu, Haigang, Chu Sun, Mengyu He, Na Wang, and Yuanjun Zhou. "Analysis of Synchronous Generator Self-Excitation under Capacitive Load Condition in Variable-Frequency Aviation Power System." Machines 11, no. 1 (2022): 15. http://dx.doi.org/10.3390/machines11010015.

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As power electronic converters become more widely used in aviation power systems, the associated capacitive loads in the harmonic filter circuits increase accordingly. The risk of self-excitation of aeronautical synchronous generators due to capacitive loads is thus increased. Compared with the self-excitation of a generator in a conventional fixed-frequency power system, this process is more complicated in a variable-frequency aviation power supply (360–800 Hz), as both the varied frequency and the loading conditions contribute to the self-excitation. To quantify this effect, in our study, a

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11

Shneen, Salam Waley, Hashmia S. Dakheel, and Zainab B. Abdullah. "Design and Implementation of No Load, Constant and Variable Load for DC Servo Motor." Journal of Robotics and Control (JRC) 4, no. 3 (2023): 323–29. http://dx.doi.org/10.18196/jrc.v4i3.17387.

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Simulations were conducted to improve and design an appropriate control system and obtain a model with the required development to suit the operation of the engine with constant and variable loads, which are the proposed working conditions that are suitable for many applications. The current simulation aims to build and design a model for an electric motor (DC Servo motor) and a model for a conventional controller (PID). The proposed model addresses the cases of fixed and variable loads in terms of using the controller that improves the performance of the motor’s work for different conditions.

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Thorburn, Lukas P., Lynn S. Adler, Rebecca E. Irwin, and Evan C. Palmer-Young. "Variable effects of nicotine and anabasine on parasitized bumble bees." F1000Research 4 (September 21, 2015): 880. http://dx.doi.org/10.12688/f1000research.6870.1.

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Secondary metabolites in floral nectar have been shown to reduce parasite load in two common bumble bee species. Previous studies on the effects of nectar secondary metabolites on parasitized bees have focused on single compounds in isolation; however, in nature, bees are simultaneously exposed to multiple compounds. We tested for synergistic effects of two alkaloids found in the nectar of Nicotiana spp. plants, nicotine and anabasine, on parasite load and mortality in bumble bees (Bombus impatiens) infected with the intestinal parasite Crithidia bombi. Adult worker bees inoculated with C. bom

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Glyva, V., O. Tykhenko, L. Levchenko та V. Kolumbet. "Сontrol of electromagnetic field levels under conditions of variable energy load". Scientific papers of Donetsk National Technical University”. Series: “Computer engineering and automation” 32, № 1 (2019): 27–36. http://dx.doi.org/10.31474/2075-4272-2019-1-32-27-36.

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14

Lozano, Miguel A., Monica Carvalho, and Luis M. Serra. "Allocation of economic costs in trigeneration systems at variable load conditions." Energy and Buildings 43, no. 10 (2011): 2869–81. http://dx.doi.org/10.1016/j.enbuild.2011.07.002.

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15

Randall, R. B. "Vibration-based diagnostics of gearboxes under variable speed and load conditions." Meccanica 51, no. 12 (2016): 3227–39. http://dx.doi.org/10.1007/s11012-016-0583-z.

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16

Han, Qinkai, Xinglin Li, and Fulei Chu. "Skidding behavior of cylindrical roller bearings under time-variable load conditions." International Journal of Mechanical Sciences 135 (January 2018): 203–14. http://dx.doi.org/10.1016/j.ijmecsci.2017.11.013.

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17

Ren, Guo Quan, Wen Chen Zhang, and Ben Li. "Research on the Gearbox Fault Signal Relation to the Sensitivity of Variable Working Conditions." Applied Mechanics and Materials 494-495 (February 2014): 921–24. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.921.

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Established the gearbox fault model and simulated it at different load conditions view of the problem with gearbox experimental technique research under the variable speed and load conditions. The law between the changes of rotational speed and load with the system vibration signals was investigated and the corresponding optimal test fault condition was given. Based on this, validated the feasibility on fault diagnosis by increasing (decreasing) speed signal and found that the different load will have a different influence on the different fault signal. The different diagnostic purpose should

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Thorburn, Lukas P., Lynn S. Adler, Rebecca E. Irwin, and Evan C. Palmer-Young. "Variable effects of nicotine, anabasine, and their interactions on parasitized bumble bees." F1000Research 4 (December 16, 2015): 880. http://dx.doi.org/10.12688/f1000research.6870.2.

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Secondary metabolites in floral nectar have been shown to reduce parasite load in two common bumble bee species. Previous studies on the effects of nectar secondary metabolites on parasitized bees have focused on single compounds in isolation; however, in nature, bees are simultaneously exposed to multiple compounds. We tested for interactions between the effects of two alkaloids found in the nectar of Nicotiana spp. plants, nicotine and anabasine, on parasite load and mortality in bumble bees (Bombus impatiens) infected with the intestinal parasite Crithidia bombi. Adult worker bees inoculate

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19

Chen, Qingqiang, Yalei Yu, Jie Sun, Cainian Jing, Yanhua Zhao, and Jia Wang. "Investigation of the Wear Behavior of Surface Welding AZ91 and AZ91+Gd Alloys under Variable Loading Conditions." Crystals 11, no. 5 (2021): 554. http://dx.doi.org/10.3390/cryst11050554.

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Adding rare earth elements to magnesium alloys is an effective way to improve their wear resistance. However, the effect achieved is closely related to the friction condition. In this paper, two different types of welding wires, AZ91 magnesium alloy and AZ91 + gadolinium (Gd), were used for surface welding. Dry sliding friction and wear experiments were performed on the surfacing alloys using the pin-on-disc test. The effects of Gd addition on the wear resistance and wear mechanism of the alloy were systematically studied under low to high loads. The results show that as the load increases, th

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Naz, R., and F. M. Mahomed. "Dynamic Euler-Bernoulli Beam Equation: Classification and Reductions." Mathematical Problems in Engineering 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/520491.

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We study a dynamic fourth-order Euler-Bernoulli partial differential equation having a constant elastic modulus and area moment of inertia, a variable lineal mass densityg(x), and the applied load denoted byf(u), a function of transverse displacementu(t,x). The complete Lie group classification is obtained for different forms of the variable lineal mass densityg(x)and applied loadf(u). The equivalence transformations are constructed to simplify the determining equations for the symmetries. The principal algebra is one-dimensional and it extends to two- and three-dimensional algebras for an arb

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21

Arranz, Sofía, Abdolrasoul Sohouli, and Afzal Suleman. "Buckling Optimization of Variable Stiffness Composite Panels for Curvilinear Fibers and Grid Stiffeners." Journal of Composites Science 5, no. 12 (2021): 324. http://dx.doi.org/10.3390/jcs5120324.

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Automated Fiber Placement (AFP) machines can manufacture composite panels with curvilinear fibers. In this article, the critical buckling load of grid-stiffened curvilinear fiber composite panels is maximized using a genetic algorithm. The skin is composed of layers in which the fiber orientation varies along one spatial direction. The design variables are the fiber orientation of the panel for each layer and the stiffener layout. Manufacturing constraints in terms of maximum curvature allowable by the AFP machine are imposed for both skin and stiffener fibers. The effect of manufacturing-indu

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22

Martinez, Fredy, Holman Montiel, and Fernando Martinez. "Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 5 (2023): 5076. http://dx.doi.org/10.11591/ijece.v13i5.pp5076-5090.

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<p>In the present research, an innovative fuzzy control approach is developed specifically for synchronous buck converters utilized in renewable energy applications. The proposed control strategy effectively manages load changes, nonlinear loads, and input voltage variations while improving both stability and transient response. The method employs a fuzzy inference system (FIS) that integrates adaptive control, feedforward control, and multivariable control to guarantee optimal performance under a wide range of operating conditions. The design of the control scheme involves formulating a

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23

Sivakumar, P., and Arumugam Rajapandiyan. "Enhanced OPF for DG Penetrated Power System Network under Variable Load Conditions." Advanced Materials Research 984-985 (July 2014): 1301–5. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.1301.

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In modern power systems, distributed generation turns out to be progressively significant. Conversely, the growing utilize of distributed generators origins the concerns on the growing system hazard owing to their probable breakdown or unruly power productivity based on such renewable energy sources as wind and the sun. Power contribution at the required proportion by the grids is the chief performance consideration which depends upon the penetration of distributed generation and the accessibility of conventional sources during the load transform. In this paper, the projected approach is that

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Kozak, Dariusz, Paweł Mazuro, and Andrzej Teodorczyk. "Numerical Simulation of Two-Stage Variable Geometry Turbine." Energies 14, no. 17 (2021): 5349. http://dx.doi.org/10.3390/en14175349.

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The modern internal combustion engine (ICE) has to meet several requirements. It has to be reliable with the reduced emission of pollutant gasses and low maintenance requirements. What is more, it has to be efficient both at low-load and high-load operating conditions. For this purpose, a variable turbine geometry (VTG) turbocharger is used to provide proper engine acceleration of exhaust gases at low-load operating conditions. Such a solution is also efficient at high-load engine operating conditions. In this paper, the result of an unsteady, three-dimensional (3D) simulation of the variable

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25

Chen, Xingbin, Xinhe Min, Peng Zhang, Nini Li, Zhihong Zhong, and Yuansheng Wu. "Study on Impact Characteristics of Multistage Double Crown Face Gear Pairs considering Ratio Switching under Variable Conditions." Shock and Vibration 2020 (August 5, 2020): 1–16. http://dx.doi.org/10.1155/2020/8880093.

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This paper presents a new transmission mechanism with multistage face gears as the core components for realizing variable speeds with differential meshing. To improve face gear transmission smoothness, suppress meshing resonance, reduce noise, and optimize power transmission performance during the gear shifting process, load distribution between meshing teeth during the transmission process and impact loads during various shifting stages must be determined. Herein, we present a gear impact model considering double crown gear meshing configuration, contact deformation, variable working conditio

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26

Zagar, Philipp, Helmut Kogler, Rudolf Scheidl, and Bernd Winkler. "Hydraulic Switching Control Supplementing Speed Variable Hydraulic Drives." Actuators 9, no. 4 (2020): 129. http://dx.doi.org/10.3390/act9040129.

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Primary control of linear motion by variable speed electric motors driving a hydraulic cylinder via a constant displacement pump is an established and successful concept with a frequent use in industry. One problem arises when low or zero motion speed has to be realized under high pump pressure conditions. Such load scenarios occur frequently in certain pressing processes, e.g., for sintering or veneering. Most pumps have a lower speed limit, below which critical tribological conditions occur which impair lifespan and efficiency. In addition, pump speed control and pump fluctuation suffer from

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27

Mroziński, Stanisław, Zbigniew Lis, and Halina Egner. "Energy Dissipated in Fatigue and Creep Conditions." Materials 14, no. 16 (2021): 4724. http://dx.doi.org/10.3390/ma14164724.

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The paper presents the results of tests performed on samples made of P91 steel under combined variable and constant load conditions, at temperature T = 600 °C. The analysis of the test results was carried out with the use of the energetic description of the fatigue process. It was shown that the order of occurrence of the fatigue load and creep in the load program influences the fatigue life and the value of the energy cumulated in the sample until fracture.

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Argyropoulos, P., K. Scott, and W. M. Taama. "Dynamic response of the direct methanol fuel cell under variable load conditions." Journal of Power Sources 87, no. 1-2 (2000): 153–61. http://dx.doi.org/10.1016/s0378-7753(99)00475-9.

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29

Moshrefzadeh, Ali. "Condition monitoring and intelligent diagnosis of rolling element bearings under constant/variable load and speed conditions." Mechanical Systems and Signal Processing 149 (February 2021): 107153. http://dx.doi.org/10.1016/j.ymssp.2020.107153.

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30

Soroka, М. М. "LIMIT STATE OF ARCHES OF VARIABLE STIFFNESS." Bulletin of Odessa State Academy of Civil Engineering and Architecture, no. 81 (December 7, 2020): 97–104. http://dx.doi.org/10.31650/2415-377x-2020-81-97-104.

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Abstract. An algorithm is proposed for numerically solving the problem of finding the maximum load for flat bar systems having a rectangular section of variable height. The material is elastoplastic; its physical properties are described by the Prandtl diagram. It is assumed that the compressive and tensile strength of the material are different. The modulus of elasticity in tension and compression is the same. The limiting state of a rectangular cross section under the simultaneous action of a longitudinal force and a bending moment is described. Using the proposed algorithm, a program was de

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31

Hu, Shengqiao, Houcai Liu, Huimin Kang, Puren Ouyang, Zhicheng Liu, and Zhengjie Cui. "High Precision Hybrid Torque Control for 4-DOF Redundant Parallel Robots under Variable Load." Actuators 12, no. 6 (2023): 232. http://dx.doi.org/10.3390/act12060232.

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As regards the impact and chattering of 4-DOF redundant parallel robots that occur under high-speed variable load operating conditions, this study proposed a novel control algorithm based on torque feedforward and fuzzy computational torque feedback hybrid control, which considered both the joint friction torque and the disturbance torque caused by the variable load. First of all, a modified dynamic model under variable load was established as follows: converting terminal load change to terminal centroid coordinate change, then mapping to the calculation of terminal energy, and lastly, establi

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32

Li, Qiang, Di Liu, Shen Chen, et al. "Control strategy of bidirectional DC/DC converter under variable load state." Journal of Physics: Conference Series 2703, no. 1 (2024): 012087. http://dx.doi.org/10.1088/1742-6596/2703/1/012087.

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Abstract To improve the stability of DC/DC converters under multiple load conditions, the control strategy of Buck-Boost bidirectional DC/DC converters under variable load conditions is studied in this paper, as well as the droop control strategy for parallel operation of two machines. Based on the topology and basic control strategy of the DC/DC converter, a load current feedforward compensation strategy to achieve ideal stability of output voltage during load switching is studied; then charging and discharging control switching strategy under external power supply is proposed, which achieves

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33

Liu, Simin. "Study on Typical Aerodynamic Faults of Variable Pitch Wind Turbine." Frontiers in Computing and Intelligent Systems 3, no. 1 (2023): 16–20. http://dx.doi.org/10.54097/fcis.v3i1.6017.

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The variable-speed variable-pitch wind turbine is an important part of China's power and energy systems, and is also the main conversion form of wind energy utilization. Aiming at the problem that the traditional blade element-momentum theory cannot achieve the modeling and simulation of wind turbine plane wind unbalance caused by wind shear and tower shadow effect, the modeling and simulation numerical calculation method of aerodynamic load of wind turbine actuation disk with different blade wind unbalance pitch angles is proposed, This method can derive the analytical expressions for solving

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34

Patel, Vimal. "Performance Investigation of Variable Compression Ratio Engine." International Journal for Research in Applied Science and Engineering Technology 9, no. 10 (2021): 1296–306. http://dx.doi.org/10.22214/ijraset.2021.38577.

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Abstract: Variable Compression Ratio (VCR) engine test can be used to determine the effect of Compression Ratio (CR) on the performance and emissions of the engine. The combustion situation, when provided with a pressure transducer. The performance frequency parameters like efficiencies, power, and specific fuel consumption are determined. The combustion phenomenon is also observed through this work, we can find the optimum compression ratio for which the best performance is possible. In order to find out the optimum compression ratio, experiments were carried out on a single-cylinder four-str

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35

Krishnamoorthy, Gautham, Evan Bloom, Krishnamoorthy Viswanathan, Shuchita Sanjay Patwardhan, David John Stadem, and Steve Benson. "Measurements and Prediction of Ash Deposition in a Cyclone-Fired Boiler Operating under Variable Load Conditions." Fluids 8, no. 12 (2023): 305. http://dx.doi.org/10.3390/fluids8120305.

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Measurements of ash deposition rates were made between the secondary superheater and reheater sections of a 450 MW cyclone-fired lignite boiler as the operational load varied from 33 to 100%. Significant reductions in deposition rates with a decrease in operational load were observed. To uncover the causative mechanisms behind these observations, operational data from the power plant were used to carry out computational fluid dynamic (CFD) simulations of the boiler. After ascertaining that the gas temperatures and velocities at various sections within the boiler were being represented adequate

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36

Lee, Je-hyeon, Piljae Im, Jeffrey D. Munk, Mini Malhotra, Min-seok Kim, and Young-hak Song. "Comparison Evaluations of VRF and RTU Systems Performance on Flexible Research Platform." Advances in Civil Engineering 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/7867128.

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The energy performance of a variable refrigerant flow (VRF) system was evaluated using an occupancy-emulated research building in the southeastern region of the United States. Full- and part-load performance of the VRF system in heating and cooling seasons was compared with a conventional rooftop unit (RTU) variable-air-volume system with electric resistance heating. During both the heating and cooling seasons, full- and part-load conditions (i.e., 100%, 75%, and 50% thermal loads) were maintained alternately for 2 to 3 days each, and the energy use, thermal conditions, and coefficient of perf

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Dai, Peng, Jianping Wang, Shuping Yan, Shengzhou Huang, Fengtao Wang, and Jun Liu. "Vibration characteristics of the gear shaft-bearing system with compound defects under variable operating conditions." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 236, no. 1 (2021): 113–29. http://dx.doi.org/10.1177/14644193211055021.

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Due to the variable working conditions, there are compound defects in the gear shaft-bearing system easily, vibration signals are very complex, and the fault diagnosis of the system becomes more difficult. Thus, a 36 degrees of freedom (36-DOFs) dynamic model is established for discussing the vibration characteristics of the gear shaft-bearing system, the gear pair spalling defect is considered, there are localized defects on the inner raceway and outer raceway of the supporting bearing, the work conditions contain variable speed, variable load, speed fluctuation, and load fluctuation. The obt

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Carreno, Alvaro, Marcelo Perez, Carlos Baier, Alex Huang, Sanjay Rajendran, and Mariusz Malinowski. "Configurations, Power Topologies and Applications of Hybrid Distribution Transformers." Energies 14, no. 5 (2021): 1215. http://dx.doi.org/10.3390/en14051215.

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Distribution systems are under constant stress due to their highly variable operating conditions, which jeopardize distribution transformers and lines, degrading the end-user service. Due to transformer regulation, variable loads can generate voltage profiles out of the acceptable bands recommended by grid codes, affecting the quality of service. At the same time, nonlinear loads, such as diode bridge rectifiers without power factor correction systems, generate nonlinear currents that affect the distribution transformer operation, reducing its lifetime. Variable loads can be commonly found at

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39

Karwowski, Waldemar, Bohdana Sherehiy, Paul Ray Gaddie, Tamer Khalaf, and Peter M. Quesada. "The effects of lifting instructions on the psychophysically selected lifting load limits: A need for reappraisal." Occupational Ergonomics 7, no. 1 (2007): 43–51. http://dx.doi.org/10.3233/oer-2007-7105.

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This study investigated the effect of three different lifting instruction sets on the psychophysically selected loads. The instruction sets corresponded to three different load limit concepts: maximum acceptable weight of lift (MAWL), maximum comfortable weight of lift (MCWL), and maximum safe weight of lift (MSWL). Results demonstrated significant lifting instruction effects on the investigated dependent variables, including: selected load weight, selected load weight estimation, perceived physical effort, and perceived comfort and safety ratings associated with the selected load weights. Per

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40

Subramani, Prabu, Sugadev Mani, Wen-Cheng Lai, and Dineshkumar Ramamurthy. "Sustainable Energy Management and Control for Variable Load Conditions Using Improved Mayfly Optimization." Sustainability 14, no. 11 (2022): 6478. http://dx.doi.org/10.3390/su14116478.

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In recent trends, renewable energies are infinite, safe, and are becoming a reliable source for electricity requirements. However, they have certain variations in their results because of climate change, which is its major issue. To solve this challenge, a hybrid renewable energy system was created by combining various energy sources. Energy management strategies must be employed to determine the best possible performance of renewable energy-based hybrid systems, as well as to fulfil demand and improve system efficiency. This work describes an Energy Management System (EMS) for a Hybrid Renewa

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41

Burle, Trinadha, and V. V. S. Bhaskara Reddy Chintapalli. "Modified load flow algorithm suitable for modern power systems under variable weather conditions." Electric Power Systems Research 211 (October 2022): 108221. http://dx.doi.org/10.1016/j.epsr.2022.108221.

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42

Umbrajkaar, A. M., A. Krishnamoorthy, and R. B. Dhumale. "Vibration Analysis of Shaft Misalignment Using Machine Learning Approach under Variable Load Conditions." Shock and Vibration 2020 (July 30, 2020): 1–12. http://dx.doi.org/10.1155/2020/1650270.

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The Industry 4.0 revolution is insisting strongly for use of machine learning-based processes and condition monitoring. In this paper, emphasis is given on machine learning-based approach for condition monitoring of shaft misalignment. This work highlights combined approach of artificial neural network and support vector machine for identification and measure of shaft misalignment. The measure of misalignment requires more features to be extracted under variable load conditions. Hence, primary objective is to measure misalignment with a minimum number of extracted features. This is achieved th

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43

Facchi, A., C. Gandolfi, and M. J. Whelan. "A comparison of river water quality sampling methodologies under highly variable load conditions." Chemosphere 66, no. 4 (2007): 746–56. http://dx.doi.org/10.1016/j.chemosphere.2006.07.050.

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Teferra, Demsew Mitiku, Livingstone M. H. Ngoo, and George N. Nyakoe. "Fuzzy-Swarm Intelligence-Based Short-Term Load Forecasting Model as a Solution to Power Quality Issues Existing in Microgrid System." Journal of Electrical and Computer Engineering 2022 (April 18, 2022): 1–14. http://dx.doi.org/10.1155/2022/3107495.

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Load demand is highly stochastic and uncertain. This is because it was highly influenced by a number of variables like load type, weather conditions, time of day, the seasonality factor, economic constraints, and other randomness effects. The loads are categorized as holiday loads (national and religious), weekdays, and weekend days. The nonlinearity and uncertain characteristics of electrical load in a microgrid are one of the major sources of power quality problems in a microgrid system, and they can be handled using an accurate load forecast model. The fuzzy load prediction model can effect

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Huang, Long, Yuemin Zhao, Yadong Zhang, Miao Pan, Haishen Jiang, and Liang Dong. "Coupling mechanism of materials and screen surface motion in multi-stage variable inclination equal thickness screening process." Journal of Physics: Conference Series 2076, no. 1 (2021): 012087. http://dx.doi.org/10.1088/1742-6596/2076/1/012087.

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Abstract Multi-stage variable inclination equal-thickness screen (MSVIETS) is widely used in separating coal and mineral particles because of its large production capacity and good screening performance. In this study, the kinematic characteristics of infeed and outfeed ends surface under the conditions of load and no load was investigated by using a high-speed camera analysis system. The motion speed of the screen surface at the infeed end was approximately 5 times higher under load than under no-load conditions, and motion speed of the screen surface at the outfeed end was approximately 4 ti

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Xie, Yingjiang, Fu Niu, Jinggong Sun, and Lingshuai Meng. "Design and Analysis of a Novel Quasi-Zero Stiffness Isolator under Variable Loads." Mathematical Problems in Engineering 2022 (January 31, 2022): 1–17. http://dx.doi.org/10.1155/2022/9082752.

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The designed load of most quasi-zero stiffness (QZS) isolators is constant. The isolation performance will drop sharply once the load changes. A novel QZS isolator that can adapt to variable loads is proposed in this paper to improve the range of application of the isolator. The isolator is designed by paralleling the electromagnetic spring (ES), which provides negative stiffness, and the pneumatic spring (PS), which provides positive stiffness. The positive and negative stiffness can be adjusted by changing the pressure and coil current, which provides the possibility for the isolator to adap

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Chaudhari, Ashish J., Dnyaneshwar Panchal, Shankar Kolekar, Swapnil Kadav, Harshal Moradiya, and Vinay D. Patel. "Performance Evaluation of Diesel Engine Using Novel Variable Compression Ratio Mechanism." Advanced Science, Engineering and Medicine 12, no. 11 (2020): 1417–21. http://dx.doi.org/10.1166/asem.2020.2608.

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Increasingly stringent emission and fuel economy standards brings opportunities and research in automobile engine technology development to make it more efficient and less polluting. There are various performance improvement strategies adopted by different researchers in order to get maximum power from the minimum quantity of fuel alongside substantial reduction in exhaust gas emission. The techniques such as CRDI (Common Rail Direct Injection), VVT (Variable valve timing) and such more are commercially viable and successfully incorporated in vehicles. Along the similar track, this paper highl

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Agyeman, Kofi Afrifa, Gyeonggak Kim, Hoonyeon Jo, Seunghyeon Park, and Sekyung Han. "An Ensemble Stochastic Forecasting Framework for Variable Distributed Demand Loads." Energies 13, no. 10 (2020): 2658. http://dx.doi.org/10.3390/en13102658.

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Accurate forecasting of demand load is momentous for the efficient economic dispatch of generating units with enormous economic and reliability implications. However, with the high integration levels of grid-tie generations, the precariousness in demand load forecasts is unreliable. This paper proposes a data-driven stochastic ensemble model framework for short-term and long-term demand load forecasts. Our proposed framework reduces uncertainties in the load forecast by fusing homogenous models that capture the dynamics in load state characteristics and exploit model diversities for accurate p

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Haro-Larrode, Marta. "Variable Reactance Criteria to Mitigate Voltage Deviations in Power Transformers in Light- and Over-Load Conditions." Machines 11, no. 8 (2023): 797. http://dx.doi.org/10.3390/machines11080797.

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In this paper, variable reactance (VR) criteria are proposed to mitigate voltage deviations in power transformers under light-load inductive and capacitive conditions, as well as for over-load conditions. Under capacitive load conditions, power transformers are affected by the Ferranti effect as much as AC lines are and can suffer damage if a large over-voltage is present at the secondary winding. A classical solution for this is the installation of expensive and bulky inductive reactors at different locations of the AC lines to absorb the reactive power. Instead, this paper addresses VR techn

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Khristich, Anna L., Svitlana A. Kolot, and Viktor Polic. "Designing a professional burnout correction program based on life-purpose orientations in wartime conditions." Herald of Advanced Information Technology 6, no. 1 (2023): 81–96. http://dx.doi.org/10.15276/hait.06.2023.6.

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The work is devoted to substantiation of possibility of reduction of failure rate of thermal mode support system when operating with variable load by control of reliability indicators of thermoelectric cooler. A mathematical model for evaluating the effect of variable thermal load on reliability indicators of a single-cascade thermoelectric cooler at a given temperature level of cooling, medium temperature, geometry of thermocouple branches for various current modes of operation is considered. The relationship between the cooler steady-state operation time and mass and heat capacity of the str

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