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Journal articles on the topic 'Combined propulsion complex'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Grigoryev, Andrey, and Dmitry Ulitovsky. "Computer modeling of ship combined propulsion plants." E3S Web of Conferences 244 (2021): 08004. http://dx.doi.org/10.1051/e3sconf/202124408004.

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Combined propulsion plants (CPP) are increasingly being used on modern ships of foreign and domestic construction. A feature of such plants is that the energy for the movement of the vessel is generated in them in two (or more) different types of ship engines - heat and electric ones, working on a common propulsor. Combined plants are complex electromechanical systems designed to provide propulsion in various modes of ship operation and generate electricity in a cruising mode or during a lay-up. CPP combine the advantages of traditional propulsion plant with heat main engines and electric prop

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2

Luo, Dongdong, Qing Ouyang, and Hongsheng Hu. "Design and Analysis of Combined Vibration Absorbers for Ship Propulsion Shaft Systems." Actuators 14, no. 1 (2025): 41. https://doi.org/10.3390/act14010041.

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The vibration of a ship’s propulsion shaft system directly affects the ship’s lifespan, and many studies have designed vibration absorbers only for one of the natural frequencies of a ship’s propulsion shaft system without considering the influence of multiple low-order resonance frequencies. In this paper, a vibration absorber combined with a magnetorheological elastomer vibration absorber and a rubber vibration absorber in series is designed, and it can cover two torsional natural frequency band ranges to achieve better vibration reduction performances in multiple different torsional natural

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3

Budashko, Vitalii, Albert Sandler, Sergii Khniunin, and Valentyn Bogach. "Design of the predictive management and control system for combined propulsion complex." Eastern-European Journal of Enterprise Technologies 5, no. 2 (131) (2024): 90–102. http://dx.doi.org/10.15587/1729-4061.2024.313627.

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The object of this researching is the process of maneuvering a sea-based vehicle under compressed conditions, which requires one hundred percent reserve of thrusters (THRs) of various modifications and locations. The main problem is the provision of energy-efficient control over the ship's motion at low speed in the horizontal plane using a high-level predictive controller. The hierarchy of the motion control system (MCS) is usually divided into several levels with the help of a high-level motion controller and the THR motor control distribution algorithm. This allows for a modular software st

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4

Neogi, Ishan, Vardhan Niral Shah, Pragalbh Dev Singh, and Vaibhav Joshi. "Propulsion of a combined heaving and trailing-edge morphing foil for bio-inspired applications." Physics of Fluids 35, no. 4 (2023): 043610. http://dx.doi.org/10.1063/5.0145443.

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Locomotion of aquatic animals involves flapping of their body to generate lift and thrust. Through evolution, they have mastered their ability to move through complex environments in an energy-efficient manner. A crucial component of this movement is the ability to actively bend their bodies to generate maximum thrust. This motion is widely termed as morphing. A simplification of this motion is implemented for a foil in this study to realize a thrust-generating bio-inspired device. The propulsive performance of the heaving foil undergoing a prescribed trailing-edge morphing is numerically stud

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Li, Bing-Hua, Xian-Wen Huang, Yao Zheng, Fang-Fang Xie, Jing Wang, and Jian-Feng Zou. "Performance of flapping airfoil propulsion with LBM method and DMD analysis." Modern Physics Letters B 32, no. 12n13 (2018): 1840024. http://dx.doi.org/10.1142/s0217984918400249.

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In this work, the performance of flapping airfoil propulsion at low Reynolds number of Re = 100–400 is studied numerically with the lattice Boltzmann method (LBM). Combined with immersed boundary method (IBM), the LBM has been widely used to simulate moving boundary problems. The influences of the reduced frequency on the plunging and pitching airfoil are explored. It is found that the leading-edge vertex separation and inverted wake structures are two main coherent structures, which dominate the flapping airfoil propulsion. However, the two structures play different roles in the flow and the

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Wu, Chunxiao, Yu Lu, Shewen Liu, et al. "Research on Optimization Design of Fully Parameterized Pump-Jet Propulsion." Journal of Marine Science and Engineering 10, no. 6 (2022): 766. http://dx.doi.org/10.3390/jmse10060766.

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A pump-jet propulsion system is composed of rotor, stator, and duct. The stator has the front stator type and the rear stator type; the conduit also has the acceleration conduit and the deceleration conduit two forms. It is difficult to design and evaluate the performance of a pump-jet propulsion system because of its complex structure and many changes in component parameters. Due to the limitation of time and cost in the design process of the pump-jet propulsion system, it is difficult to find the optimal scheme in the design space. However, under the guidance of an optimization algorithm, th

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7

Liberman, Ya L., E. V. Lepikhin, and L. N. Gorbunova. "DEVELOPMENT OF AN ALL-TERRAIN CHASSIS WITH COMBINED THRUSTERS." Spravochnik. Inzhenernyi zhurnal, no. 324 (March 2024): 33–37. http://dx.doi.org/10.14489/hb.2024.03.pp.033-037.

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Variants of propulsion systems for small-sized vehicles are considered; their advantages and disadvantages are noted. The modernize the all-terrain vehicle, a mover with motor wheels was taken, which has a small weigth and the least complexity of the design. The low weight of the motor wheels will significantly reduce the influence of dynamic loads on the elements of the propellers, which, in turn will significantly increase the life of the propeller. The absence of complex mechanisms in the design (transfer case, cardan gears and other rapidly wearing components) increases reliability and inc

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8

Vitalii, Budashko. "Design of the three-level multicriterial strategy of hybrid marine power plant control for a combined propulsion complex." Electrical engineering & electromechanics 2 (March 30, 2017): 62–72. https://doi.org/10.20998/2074-272X.2017.2.10.

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<strong>Purpose. </strong>Efficiency of hybrid ships power plants (SPP) combined propulsion complexes (CPC) by various criteria for energy management systems strategies. <strong>Methodology. </strong>Based on the classification system topologies SPP CPC for mechanical, electrical and hybrid types of motors schematic diagrams of management strategies for the criterion of minimum power consumption are defined. Changing the technical component of the traditional approach to building hybrid ships electric power systems (SEPS) SPP CPC the principle of modifying the structure of SEPS is applied with

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9

Vespini, Veronica, Sara Coppola, and Pietro Ferraro. "On-the-Fly Formation of Polymer Film at Water Surface." Polymers 14, no. 15 (2022): 3228. http://dx.doi.org/10.3390/polym14153228.

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The self-propulsion of bodies floating in water is of great interest for developing new robotic and intelligent systems at different scales, and whenever possible, Marangoni propulsion is an attractive candidate for the locomotion of untethered micro-robots. Significant cases have been shown using liquid and solid surfactants that allow an effective propulsion for bodies floating on water to be achieved. Here, we show for the first time a strategy for activating a twofold functionality where the self-propulsion of a floating body is combined with the formation of a polymer thin film at the wat

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10

Rao, M. Srinivasa. "Flow Analyses of Integrated Liquid Fuel RAMJET Propulsion System." Defence Science Journal 74, no. 2 (2024): 288–92. http://dx.doi.org/10.14429/dsj.74.18510.

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A CFD study is performed to check the seamless flow behaviour of the Liquid Fuel Ramjet Propulsion system which includes, air intakes, combustor and nozzle. Resolving both supersonic and subsonic flow scales in the same domain makes the simulations complex. Addition of combustion with stiff chemistry makes the simulations more difficult. CFD simulations are carried out using commercially available CFD software. Liquid fuel is injected as discrete phase and the flow turbulence is modelled using Realizable k-ε turbulence model. Jet-A + air combustion has been simulated using combined finite rate

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11

Braaksma, Jelmer, Enrico Ferlinghetti, Sonja de Groot, Matteo Lancini, Han Houdijk, and Riemer J. K. Vegter. "Calibration to Differentiate Power Output by the Manual Wheelchair User from the Pushrim-Activated Power-Assisted Wheel on a Force-Instrumented Computer-Controlled Wheelchair Ergometer." Actuators 13, no. 7 (2024): 257. http://dx.doi.org/10.3390/act13070257.

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To examine the biomechanical demands of manual wheelchair propulsion, it is crucial to determine the wheelchair user’s (WCU) force for propulsion technique parameter calculation. When using a pushrim-activated power-assisted wheelchair (PAPAW) on a wheelchair ergometer, a combined propulsion force from the WCU and PAPAW is exerted. To understand PAPAW’s assistance and distinguish the WCU’s force application from the force exerted by the PAPAW, both propulsion components must be assessed separately. In this study, a calibration of the PAPAW on an ergometer was developed to achieve this separati

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12

Liu, Jinlin, Zheng Gu, and Shuyong Liu. "Research on MDO of Ship Propulsion Shafting Dynamics Considering the Coupling Effect of a Propeller-Shafting-Hull System." Polish Maritime Research 30, no. 1 (2023): 86–97. http://dx.doi.org/10.2478/pomr-2023-0009.

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Abstract Dynamic designs for ship propulsion shafting can be categorised as complex multi-disciplinary coupling systems. The traditional single disciplinary optimisation design method has become a bottleneck, restricting the further improvement of shafting design. In this paper, taking a complex propulsion shafting as the object, a dynamic analysis model of the propeller-shafting-hull system was established. In order to analyse the coupling effect of propeller hydrodynamics on shafting dynamics, the propeller’s hydrodynamic force in the wake flow field was calculated as the input for shafting

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13

Budashko, V. V. "DESIGN OF THE THREE-LEVEL MULTICRITERIAL STRATEGY OF HYBRID MARINE POWER PLANT CONTROL FOR A COMBINED PROPULSION COMPLEX." Electrical Engineering & Electromechanics, no. 2 (April 29, 2017): 62–72. http://dx.doi.org/10.20998/2074-272x.2017.2.10.

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14

Van Griethuysen, V. J., M. R. Glickstein, and E. S. Hodge. "Integrating Subsystems and Engine System Assessments." Journal of Engineering for Gas Turbines and Power 125, no. 1 (2002): 263–69. http://dx.doi.org/10.1115/1.1496117.

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In the past, system and subsystem level assessments for propulsion systems have been a long and drawn out serial process, typically taking several months to a year or more. Data exchange from one subsystem group to the next was a manual process. This was particularly the case when different computer platforms were being utilized to run the models. Each group would optimize their particular subsystem as a separate entity. There were no approaches available to facilitate the evaluation of how a particular subsystem, when combined with the engine, would impact the overall integrated system. The a

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15

Schmid, Norbert R., Dirk C. Leinhos, and Leonhard Fottner. "Steady Performance Measurements of a Turbofan Engine With Inlet Distortions Containing Co- and Counterrotating Swirl From an Intake Diffuser for Hypersonic Flight." Journal of Turbomachinery 123, no. 2 (2000): 379–85. http://dx.doi.org/10.1115/1.1343466.

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The influence of distorted inlet flow on the steady and unsteady performance of a turbofan engine, which is a component of an air-breathing combined propulsion system for a hypersonic transport aircraft, is reported in this paper. The performance and stability of this propulsion system depend on the behavior of the turbofan engine. The complex shape of the intake duct causes inhomogeneous flow at the engine inlet plane, where total pressure and swirl distortions are present. The S-bend intakes are installed axisymmetrically left and right into the hypersonic aircraft, generating axisymmetric m

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16

Zhang, Tengfei, Rongjun Mu, Yilin Zhou, et al. "A Station-Keeping Control Strategy for a Symmetrical Spacecraft Utilizing Hybrid Low-Thrust Propulsion in the Heliocentric Displaced Orbit." Symmetry 15, no. 8 (2023): 1549. http://dx.doi.org/10.3390/sym15081549.

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The solar sail spacecraft utilizing a hybrid approach of solar sail and solar electric propulsion in the heliocentric displaced orbit is affected by external disturbances, internal unmodeled dynamics, initial injection errors, and input saturation. To solve the station-keeping control problem under such complex conditions, an adaptive control strategy is proposed. First, the dynamical equations of the spacecraft utilizing hybrid low-thrust propulsion in the cylindrical coordinate system are derived. Second, the combined disturbance acceleration introduced by external disturbances and internal

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17

Kaisong, Yuan, de la Asunción Nadal Victor, Jurado Beatriz, and Miguel Jesús Alberto Escarpa. "2D Nanomaterials Wrapped Janus Micromotors with Built-in Multiengines for Bubble, Magnetic, and Light Driven Propulsion." Chemistry of Materials 32, no. 5 (2020): 1983–92. https://doi.org/10.1021/acs.chemmater.9b04873.

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Graphene oxide, graphdyine oxide, and black-phosphorus coated micromotors integrating “three engines” for motion control using different stimuli such as chemical fuel, light, and magnetic fields are described. Micromotors can be mass-produced by wrapping gold-sputtered polystyrene microspheres with the 2D nanomaterials, followed by simultaneous assembly of Pt or MnO<sub>2</sub> nanoparticles (NPs) as bubble (catalytic)-engines, Fe<sub>2</sub>O<sub>3</sub> NPs as magnetic engines, and quantum dots (QDs) as light engines. The design and composition of micromotors are key to get

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18

Yushkov, E. A. "MODELING OF OPERATION MODES OF SHIP POWER PLANT OF COMBINED PROPULSION COMPLEX WITH CONTROL SYSTEM BASED ON ELECTRONIC CONTROLLERS." Electrical Engineering & Electromechanics, no. 6 (December 19, 2016): 39–44. http://dx.doi.org/10.20998/2074-272x.2016.6.07.

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19

Vitalii, Budashko, Sandler Albert, and Khniunin Sergii. "Improving the method of linear-quadratic control over a physical model of vessel with azimuthal thrusters." Eastern-European Journal of Enterprise Technologies 1, no. 2 (121) (2023): 49–71. https://doi.org/10.15587/1729-4061.2023.273934.

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The object of this research is the algorithms for controlling large-scale models of sea-based vehicles (SBVs). The subject of the research is a linear-quadratic method for controlling a model of the propulsion complex with azimuthal thrusters (ATs) in the aft part. The problem is the solution between the interdependent throws of surge, sway, and yaw speeds predicted by the linear controller. Input signals are the rotational speeds and the angles of ATs propeller thrusts with respect to the diametrical plane of SBVs. During the simulation, step responses of a closed system for overload and rota

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20

Tang, Peng, Fei Wang, and Yuehong Dai. "Controller Design for Different Electric Tail Rotor Operating Modes in Helicopters." International Journal of Pattern Recognition and Artificial Intelligence 33, no. 08 (2019): 1959022. http://dx.doi.org/10.1142/s0218001419590225.

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The nonlinear aerodynamics and new kinds of operation associated with helicopter electric tail rotors (ETRs) make accurate speed tracking control under complex flight conditions a key challenge confronting designers. In this paper, we present an electric propulsion system for tail rotors that uses a high-power-density permanent magnet motor. The management of aerodynamic disturbance rejection and accurate speed control are aspects of ETR design that require particularly close attention. To this end, we have developed a speed controller that is based on an active disturbance rejection control (

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21

Zeeshan, Ahmed, Mubashir Bhatti, Nouman Ijaz, Osman Bég, and Ali Kadir. "Biologically inspired transport of solid spherical nanoparticles in an electrically-conducting viscoelastic fluid with heat transfer." Thermal Science 24, no. 2 Part B (2020): 1251–60. http://dx.doi.org/10.2298/tsci180706324z.

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Bio-inspired pumping systems exploit a variety of mechanisms including peristalsis to achieve more efficient propulsion. Non-conducting, uniformly dispersed, spherical nanosized solid particles suspended in viscoelastic medium forms a complex working matrix. Electromagnetic pumping systems often employ complex working fluids. A simulation of combined electromagnetic bio-inspired propulsion is observed in the present article. Currents formation has increasingly more applications in mechanical and medical industry. A mathematical study is conducted for MHD pumping of a bi-phase nanofluid coupled

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Nista, Ludovico, and Bayindir H. Saracoglu. "Development of a robust solver to model the flow inside the engines for high-speed propulsion." MATEC Web of Conferences 304 (2019): 03013. http://dx.doi.org/10.1051/matecconf/201930403013.

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The demand for discovering new commercial routes as well as the possibility to shortening civilian long-haul flights boosted the interest of civil hypersonic vehicle designs. Among all the multiple projects started by the various nations, the European community funded project STRATOFLY aims at refining the baseline LAPCAT II-MR2.4 design for further improvements. The new aircraft would enable a flight shorter that 3 hours from Brussels to Sydney, carrying 300-passengers above the already crowed atmosphere. The wide Mach range operability, up to Mach 8, demands the use of multiple engines, lead

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23

López-Freire, Steve Alexander. "Análisis de eficiencia energética en sistemas de propulsión híbridos para vehículos terrestres." Revista Científica Ciencia y Método 1, no. 4 (2023): 56–68. https://doi.org/10.55813/gaea/rcym/v1/n4/23.

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The growing concern about climate change has prompted the study of more efficient vehicle technologies, with hybrid propulsion systems being a key alternative in the transition towards sustainable mobility. This study develops a systematic literature review focused on the energy efficiency of ground-based hybrid systems, analyzing architectural configurations and energy management strategies. Scientific sources indexed between 2018 and 2023 were consulted, employing rigorous inclusion criteria and comparative qualitative analysis techniques. The results show that combined hybrid systems are mo

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MECLEA, Mihai-Alin, Alexandru Silviu GOGA, and Mircea BOȘCOIANU. "ASPECTS REGARDING ARTIFICIAL INTELLIGENCE USE IN MILITARY AND ENGINEERING SCIENCES AIRCRAFT PROPULSION." SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCE 25 (July 31, 2024): 64–73. http://dx.doi.org/10.19062/2247-3173.2024.25.7.

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Military operations necessitate swift and informed choices under duress. This paper explores the intersection of military and engineering sciences, proposing a novel framework that leverages artificial intelligence (AI) and advanced engineering simulations to bolster military decision-making. GenAi, using a cutting-edge large language model, is employed to analyze vast datasets of historical military campaigns, engineering feats, and terrain data. By integrating GenAi's analytical prowess with physics-based engineering simulations, the framework enables the creation of high-fidelity virtual ba

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Karczewska-Lindinger, Magdalena, Vesa Linnamo, Valeria Rosso, et al. "Force Generation Profiles of Para-Nordic Sit-Skiers Representing Different Physical Impairments." Journal of Science in Sport and Exercise 3, no. 3 (2021): 281–91. http://dx.doi.org/10.1007/s42978-021-00117-1.

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Abstract Purpose To biomechanically profile force generation connected to the complex role of the trunk in double poling in a representative sample of Para-Nordic sit-skiers. Methods Twelve male World Cup Para-Nordic sit-skiers (sport classes: LW10–12) were skiing on flat snow terrain at submaximal speed of 4.5 m/s (~ 73% maximum speed). 2D video (50 Hz) and pole force analyses (1000 Hz) were performed synchronously, examining angle, force and cycle characteristics to analyse the role of the trunk in generating propulsion. Results LW10–11.5 skiers lost between 21% and 4% propulsive force versu

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26

Sanjay, H., and Biju T. Kuzhiveli. "Analysis of combined cycle Air Breathing-Cryogenic rocket engine for single stage to orbit vehicle." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012167. https://doi.org/10.1088/1757-899x/1327/1/012167.

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Abstract Single Stage to Orbit (SSTO) and hypersonic flights are very demanding and challenging technologies in which a significant amount of studies are being conducted worldwide. One of the major challenges in this technology is the development of the propulsion system of the spacecraft or aircraft. It is found that combined cycle engines have huge potential in this area and when properly used, can be utilized for SSTO as well as hypersonic travel. Towards this, a comprehensive study is being done on the available combined Cycle Engines in aerospace technology: Turbine Based Combined Cycle (

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Rossi, Massimiliano, Giancarlo Cicconofri, Alfred Beran, Giovanni Noselli, and Antonio DeSimone. "Kinematics of flagellar swimming in Euglena gracilis: Helical trajectories and flagellar shapes." Proceedings of the National Academy of Sciences 114, no. 50 (2017): 13085–90. http://dx.doi.org/10.1073/pnas.1708064114.

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The flagellar swimming of euglenids, which are propelled by a single anterior flagellum, is characterized by a generalized helical motion. The 3D nature of this swimming motion, which lacks some of the symmetries enjoyed by more common model systems, and the complex flagellar beating shapes that power it make its quantitative description challenging. In this work, we provide a quantitative, 3D, highly resolved reconstruction of the swimming trajectories and flagellar shapes of specimens of Euglena gracilis. We achieved this task by using high-speed 2D image recordings taken with a conventional

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28

Tafti, Danesh K., Long He, and K. Nagendra. "Large eddy simulation for predicting turbulent heat transfer in gas turbines." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2022 (2014): 20130322. http://dx.doi.org/10.1098/rsta.2013.0322.

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Blade cooling technology will play a critical role in the next generation of propulsion and power generation gas turbines. Accurate prediction of blade metal temperature can avoid the use of excessive compressed bypass air and allow higher turbine inlet temperature, increasing fuel efficiency and decreasing emissions. Large eddy simulation (LES) has been established to predict heat transfer coefficients with good accuracy under various non-canonical flows, but is still limited to relatively simple geometries and low Reynolds numbers. It is envisioned that the projected increase in computationa

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29

Ku, Hyun-Keun, Chang-Hwan Park, and Jang-Mok Kim. "Full Simulation Modeling of All-Electric Ship with Medium Voltage DC Power System." Energies 15, no. 12 (2022): 4184. http://dx.doi.org/10.3390/en15124184.

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This paper proposes the full simulation model for the electrical analysis of all-electric ship (AES) based on a medium voltage DC power system. The AES has become popular both in the commercial and the military areas due to a low emission, a high fuel consumption efficiency, and a wide applicability. In spite of many advantages, it is complex and difficult to construct the whole system with many mechanical and electrical components onboard. Full electrical analysis is essentially required to simplify the design of the AES, a control and optimization of a ship electric system. The proposed full

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Marín, José, and Carlos Cuenca. "Fatigue Analysis of the Structural Bottom of an Aluminum Planing Craft through Vibratory Load of the Propeller System." Ciencia y tecnología de buques 8, no. 16 (2015): 57. http://dx.doi.org/10.25043/19098642.111.

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This work analyzed the structural fatigue of a high-speed craft, which has a propeller system formed by two 493-hpengines connected through speed multipliers to water jet systems. Its aluminum alloy structure has combined-typeframing. The useful life of the boat bottom’s structure was determined considering the cyclical loads generatedby the propulsion system, using the Finite Elements method and applying the effort-number method of cycles tofailure. For this, a structural model was developed of the selected zone, which was analyzed with the SAP2000program, to obtain complex amplitudes of the

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Lindner, T. K., J. Oldeweme, P. Scholz, and J. Friedrichs. "System Performance of Wing and Propellers in a Periodic Distributed Propulsion Experiment." Journal of Physics: Conference Series 2716, no. 1 (2024): 012003. http://dx.doi.org/10.1088/1742-6596/2716/1/012003.

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Abstract The design task for distributed propulsion (DP) aircraft is more complex than conventional twin-engine designs due to the pronounced propeller wing interaction. DP concepts rely on a beneficial and robust interaction of propulsion and lifting surface. Additionally, a good DP design is optimised as a system such that each element is not optimised by itself (i.e. ηprop and CL/CD), but with consideration of the close coupled interaction. The evaluation of such an interaction driven setup is scope of this work. Thrust and torque of a periodic co-rotating DP wing are measured simultaneousl

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Dinning, P. G., J. W. Arkwright, M. Costa, et al. "Temporal relationships between wall motion, intraluminal pressure, and flow in the isolated rabbit small intestine." American Journal of Physiology-Gastrointestinal and Liver Physiology 300, no. 4 (2011): G577—G585. http://dx.doi.org/10.1152/ajpgi.00532.2010.

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Intraluminal manometry is a tool commonly used to record motility in the human digestive tract. The recorded signal results from a combination of factors, including the hydrodynamic pressure transmitted through the intestinal contents due to contraction of the gut wall and the force of the gut wall acting on the sensors in regions of a luminal occlusion. However, the actual relationships between small bowel wall contraction, the measured intraluminal pressure, and the resultant flow have not been directly addressed. Video recording and high-resolution fiber-optic manometry were used to create

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Savenko, A. E., and P. S. Savenko. "Research of current distribution by phases in asynchronous electric motor with a combined winding." Power engineering: research, equipment, technology 23, no. 5 (2022): 172–83. http://dx.doi.org/10.30724/1998-9903-2021-23-5-172-183.

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THE PURPOSE. Consider the use of propeller electric installations as part of ship electrical complexes with a single electric power system. Highlight the rudder drives as a special type of electric propulsion of ships in northern latitudes. Investigate unified electric power systems with a propeller electric installation for the existence of power exchange oscillations in them. Propose methods and means for eliminating power oscillations in such systems.METHODS. To carry out the research, a single electric power system with electric rudder propellers of the world's only asymmetric icebreaker B

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Liu, Quanwei, Junlong Yan, Hongzhao Li, et al. "Intelligent Identification of Surrounding Rock Grades Based on a Self-Developed Rock Drilling Test System." Buildings 14, no. 7 (2024): 2176. http://dx.doi.org/10.3390/buildings14072176.

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The classification of surrounding rock is crucial for formulating safe tunnel construction plans and support measures. However, the complex geological environment of tunnels presents a challenge in obtaining accurate drilling parameters for rock mass classification. This paper presents the development of a rock drilling testing system, which includes a propulsion speed acquisition system, oil pressure acquisition system, air pressure acquisition system, and an automatic data acquisition system. This system enables real-time, high-precision automatic collection and storage of parameters such as

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Budashko, Vitalii, Albert Sandler, and Valerii Shevchenko. "Optimization of the control system for an electric power system operating on a constant-power hyperbole." Eastern-European Journal of Enterprise Technologies 1, no. 8(115) (2022): 6–17. http://dx.doi.org/10.15587/1729-4061.2022.252172.

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For an electric power system (EPS) of the combined propulsion complex (CPC), working on a constant-power hyperbola (CPH), the strategy of managing power distribution between propulsion electric motors and own needs consumers has been improved. The study reported here aimed to reduce fluctuations in current consumption and load by optimizing voltage controllers and the rotation frequency of generator assemblies (GA). The system of EPS GA voltage and frequency stabilization was synthesized by determining, in the system of equations, the dynamics of the values of EPS links' time constants and the

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Vitalii, Budashko, Sandler Albert, and Shevchenko Valerii. "Optimization of the control system for an electric power system operating on a constant-power hyperbole." Eastern-European Journal of Enterprise Technologies 1, no. 8(115) (2022): 6–17. https://doi.org/10.15587/1729-4061.2022.252172.

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For an electric power system (EPS) of the combined propulsion complex (CPC), working on a constant-power hyperbola (CPH), the strategy of managing power distribution between propulsion electric motors and own needs consumers has been improved. The study reported here aimed to reduce fluctuations in current consumption and load by optimizing voltage controllers and the rotation frequency of generator assemblies (GA). The system of EPS GA voltage and frequency stabilization was synthesized by determining, in the system of equations, the dynamics of the values of EPS links' time constants and

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Vigueras-Zuniga, Marco-Osvaldo, Maria-Elena Tejeda-del-Cueto, José-Alejandro Vasquez-Santacruz, Agustín-Leobardo Herrera-May, and Agustin Valera-Medina. "Numerical Predictions of a Swirl Combustor Using Complex Chemistry Fueled with Ammonia/Hydrogen Blends." Energies 13, no. 2 (2020): 288. http://dx.doi.org/10.3390/en13020288.

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Ammonia, a chemical that contains high hydrogen quantities, has been presented as a candidate for the production of clean power generation and aerospace propulsion. Although ammonia can deliver more hydrogen per unit volume than liquid hydrogen itself, the use of ammonia in combustion systems comes with the detrimental production of nitrogen oxides, which are emissions that have up to 300 times the greenhouse potential of carbon dioxide. This factor, combined with the lower energy density of ammonia, makes new studies crucial to enable the use of the molecule through methods that reduce emissi

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Little Jr., Jack R. "Development of Scanning Microwave Technology for Ceramics in Extreme Environments." Advances in Science and Technology 65 (October 2010): 153–62. http://dx.doi.org/10.4028/www.scientific.net/ast.65.153.

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Advanced ceramic materials are required to meet increasing high temperature demands of components in advanced propulsion engines for high performance aircraft as well as increasing structural demands in ceramic-composite armor. Monitoring the structural performance of these advanced ceramic materials presents challenges. Recently a new technology, Evisive ScanTM, based on microwave interferometry has been developed that allows condition monitoring. The internationally patented Evisive Scan™ method (1, 2, 3, 4, 5, 6), utilizes microwaves to interrogate dielectric materials. The microwaves are r

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Hasaneen, Shaimaa, Haydar Alshammaa, Abeer Mahdi, and Maryam Hashim. "The effect of complex training using the intermittent method in developing the special strength ability and achievement of young shot-put player U 20." Journal of Physical Education 36, no. 2 (2024): 434–51. http://dx.doi.org/10.37359/jope.v36(2)2024.2182.

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Complex training, which is of great importance in the development of physical capabilities through change in the motor path and diversity of exercises for the same muscle groups working during the motor performance, which depends on the ability of the muscular and nervous systems in the process of compatibility, and work to apply it in the intermittent training method that works on the continuous change in the degree of difficulty of exercise (intensity of training) coordinated with rest periods and designed to develop the ability of special forces for archers to push weight and achievement, a

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Dickson, Eamonn J., Dante J. Heredia, Conor J. McCann, Grant W. Hennig, and Terence K. Smith. "The mechanisms underlying the generation of the colonic migrating motor complex in both wild-type and nNOS knockout mice." American Journal of Physiology-Gastrointestinal and Liver Physiology 298, no. 2 (2010): G222—G232. http://dx.doi.org/10.1152/ajpgi.00399.2009.

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Colonic migrating motor complexes (CMMCs) propel fecal contents and are altered in diseased states, including slow-transit constipation. However, the mechanisms underlying the CMMCs are controversial because it has been proposed that disinhibition (turning off of inhibitory neurotransmission) or excitatory nerve activity generate the CMMC. Therefore, our aims were to reexamine the mechanisms underlying the CMMC in the colon of wild-type and neuronal nitric oxide synthase (nNOS)−/− mice. CMMCs were recorded from the isolated murine large bowel using intracellular recordings of electrical activi

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ROMET-LEMONNE, GUILLAUME, EMMANUELE HELFER, VINCENT DELATOUR, et al. "BIOMIMETIC SYSTEMS SHED LIGHT ON ACTIN-BASED MOTILITY DOWN TO THE MOLECULAR SCALE." Biophysical Reviews and Letters 04, no. 01n02 (2009): 5–15. http://dx.doi.org/10.1142/s1793048009000909.

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Cell motility, one of the modular activities of living cells, elicits the response of the cell to extra-cellular signals, to move directionally, feed, divide or transport materials. The combined actions of molecular motors and re-modeling of the cytoskeleton generate forces and movement. Here we describe mechanistic approaches of force and movement produced by site-directed assembly of actin filaments. The insight derived from a biochemical analysis of the protein machineries involved in "actin-based motile processes" like cell protrusions, invaginations, organelle propulsion, is used to build

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Alhanov, Daniil S., and Vasily I. Rubtsov. "Development of the Laboratory Work: “Modeling of a Mobile Robot on Mecanum Wheels Kinematics”." ITM Web of Conferences 35 (2020): 04001. http://dx.doi.org/10.1051/itmconf/20203504001.

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The basis of any mobile robot is the chassis of a structure. The chassis is a set of parts that provide the mechanical energy transfer from the engines to the engine active elements, combined with the drives in a functional structural subsystem. The chassis and the applied propulsion determine both the mobile robot design appearance and its functional capabilities, the main of which is the ability to move in given conditions. Omnicycle movement is used in modern robotics to get additional maneuverability of the device in combination with increasing the efficiency of using a limited level of en

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Kong, Zhengmin, Yande Cui, Zhou Xia, and He Lv. "Convolution and Long Short-Term Memory Hybrid Deep Neural Networks for Remaining Useful Life Prognostics." Applied Sciences 9, no. 19 (2019): 4156. http://dx.doi.org/10.3390/app9194156.

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Reliable prediction of remaining useful life (RUL) plays an indispensable role in prognostics and health management (PHM) by reason of the increasing safety requirements of industrial equipment. Meanwhile, data-driven methods in RUL prognostics have attracted widespread interest. Deep learning as a promising data-driven method has been developed to predict RUL due to its ability to deal with abundant complex data. In this paper, a novel scheme based on a health indicator (HI) and a hybrid deep neural network (DNN) model is proposed to predict RUL by analyzing equipment degradation. Explicitly,

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Ponyaev, L., M. Kuprikov, N. Kuprikov, and R. Domjan. "Graphene Technology for Design Efficiency of the Solar Hybrid Electrical Cryoplane and Airships." IOP Conference Series: Materials Science and Engineering 1226, no. 1 (2022): 012063. http://dx.doi.org/10.1088/1757-899x/1226/1/012063.

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Abstract The problems of introducing graphene technologies into the design studies of complex aviation solutions of minimal weight are relevant for the development of high-strength and lightweight composite structures with surface solar nano film energy storage for hybrid electric cryogenic aircraft (hydrogen cryoplanes LH2) and airships (disk-shaped Thermoplane MAI). The optimal design is directly related to the higher specific characteristics of liquid hydrogen fuel systems together with cryocooling systems, taking into account the use of new graphene-based materials and thin flexible solar

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Timoshenko, V. I., L. K. Patryliak, Yu V. Knyshenko, V. M. Durachenko, and A. S. Dolinkevych. "Use of a “green” propellant in low-thrust control jet engine systems." Technical mechanics 2021, no. 4 (2021): 29–43. http://dx.doi.org/10.15407/itm2021.04.029.

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The aim of this work is to analyze the state of the art in the development and use of pollution-free (“green”) propellants in low-thrust jet engines used as actuators of spacecraft stabilization and flight control systems and to adapt computational methods to the determination of “green”-propellant engine thrust characteristics. The monopropellant that is now widely used in the above-mentioned engines is hydrazine, whose decomposition produces a jet thrust due to the gaseous reaction products flowing out of a supersonic nozzle. Because of the high toxicity of hydrazine and the complex technolo

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Pugia, Michael J., Gert Blankenstein, Ralf-Peter Peters, et al. "Microfluidic Tool Box as Technology Platform for Hand-Held Diagnostics." Clinical Chemistry 51, no. 10 (2005): 1923–32. http://dx.doi.org/10.1373/clinchem.2005.052498.

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Abstract Background: Use of microfluidics in point-of-care testing (POCT) will require on-board fluidics, self-contained reagents, and multistep reactions, all at a low cost. Disposable microchips were studied as a potential POCT platform. Methods: Micron-sized structures and capillaries were embedded in disposable plastics with mechanisms for fluidic control, metering, specimen application, separation, and mixing of nanoliter to microliter volumes. Designs allowed dry reagents to be on separate substrates and liquid reagents to be added. Control of surface energy to ±5 dyne/cm2 and mechanical

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Mackie, George. "Quentin Bone. 17 August 1931—6 July 2021." Biographical Memoirs of Fellows of the Royal Society 72 (March 2, 2022): 55–76. http://dx.doi.org/10.1098/rsbm.2021.0042.

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Quentin Bone came from a family of well-known artists but, although he shared their talents, he chose to become a scientist because of his interest in natural history. After graduating in zoology from Oxford, he joined the scientific staff of the Marine Biological Association Laboratory at Plymouth, working there until retirement in 1991 and continuing thereafter as an emeritus research fellow. He was interested in all aspects of how fish swim, the structure and innervation of their swimming muscles, their metabolism, flotation and hydrodynamics. He showed that fishes have two distinct, indepe

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Melnikov, Mikhail, and Valeriy Ivanovich Plyushchaev. "ERROR INFLUENCE OF MEASURING THE SHIP’S COORDINATES ON THE CONTROL PROCESS QUALITY." Automation and modeling in design and management 2024, no. 2 (2024): 54–64. http://dx.doi.org/10.30987/2658-6436-2024-2-54-64.

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Autopilots are an integral part of modern ships. However, at present, many tasks are emerging, including the ones in the unmanned navigation field, requiring the use of new control algorithms and new means of monitoring navigation parameters. In particular, to solve such problems as keeping a vessel on a given trajectory, automating the ships’ divergence and similar tasks, it is necessary to have means of continuous monitoring of the ship’s location. For this purpose, receivers of global navigation satellite systems can be applied. To model control processes, it is necessary to know the distri

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Dean, Robert N., Colin B. Stevens, and John J. Tatarchuk. "A Current-Controlled PCB Integrated MEMS Tilt Mirror." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2014, DPC (2014): 000588–608. http://dx.doi.org/10.4071/2014dpc-ta32.

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Introduction: MEMS Tilt Mirror - a miniature planar micro-mirror that can experience a 1-D or 2-D tilt in response to a control signal. Commonly used technologies- electrostatic, piezoelectric, electrothermal bimorph. Applications - laser beam steering, interferometers, dynamic signal analyzers, opticcal cross-connect switches. This paper describes the design, key features and applications of a System On Chip (SOC) ASIC (Application Specific Integrated Circuit) that has been developed under an Air Force SBIR program. The SOC device has been implemented by Honeywell International using their Hi

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Fakhrul Islam, Mohammed, Brian Veitch, Ayhan Akinturk, Neil Bose, and Pengfei Liu. "Performance study of podded propulsor in static azimuthing conditions." International Shipbuilding Progress 56, no. 3-4 (2009): 135–57. https://doi.org/10.3233/isp-2010-0058.

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This paper presents a comprehensive experimental study on variations of propulsive characteristics of puller and pusher podded propulsors in static azimuthing open water conditions. A custom designed experimental apparatus consisting of a six-component global dynamometer and a three-component pod dynamometer was used to measure the propulsive performance of a model pod unit in pusher and puller configurations in a towing tank. The pod model was tested to measure the forces on the whole unit as well as thrust and torque of the propeller shaft for a range of advance coefficients combined with a

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