Results 11 to 20 of about 1,724 (215)
Inductive Coupling Discharge Characteristics of a 10-cm Dual-Stage 4-Grid Radiofrequency Ion Thruster [PDF]
Journal of Aerospace Technology and Management, 2021 In this study, the numerical simulations are used to simulate the discharge process of a 10-cm dual-stage 4-grid (DS4G) radiofrequency (RF) ion thruster, and the effects of RF coil turns, and electrical parameters on the key plasma parameters inside the ...
Yanxu Pu +7 more
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Adaptive control of ROVs with actuator dynamics and saturation [PDF]
Modeling, Identification and Control, 1992 A direct model reference adaptive controller (MRAC) is derived for an underwater vehicle with significant thruster dynamics and limited thruster power. The reference model decomposition (RMD) technique is used to compensate for the thruster dynamics.
Ola-Erik Fjellstad +2 more
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EPJ Techniques and Instrumentation, 2022 The lifetime of electric propulsion (EP) thrusters depends particularly on the erosion characteristics of operation relevant components, for instance, the grid hole erosion of gridded ion thrusters or the channel wall erosion of Hall effect thrusters ...
Carsten Bundesmann +8 more
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Optimized Use of Thrusters During Transit with a Passenger Ferry [PDF]
TransNav, 2020 This paper aims to address the impact that optimized use of propulsion equipment would have on a ferry during transit. Assuming that the ship arrives at it’s destination on schedule, a potential reduction in fuel consumption would cut the overall cost of
Erik Kløvning
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Blended Filter-Based Detection for Thruster Valve Failure and Control Recovery Evaluation for RLV
Algorithms, 2019 Security enhancement and cost reduction have become crucial goals for second-generation reusable launch vehicles (RLV). The thruster is an important actuator for an RLV, and its control normally requires a valve capable of high-frequency operation, which
Hongqiang Sun, Shuguang Zhang
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Aerospace, 2023 Pulsed plasma thrusters (PPT) have demonstrated enormous potential since the 1960s. One major shortcoming is their low thrust efficiency, typically
Dillon O’Reilly +6 more
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Electric Propulsion Methods for Small Satellites: A Review
Aerospace, 2021 Over 2500 active satellites are in orbit as of October 2020, with an increase of ~1000 smallsats in the past two years. Since 2012, over 1700 smallsats have been launched into orbit. It is projected that by 2025, there will be 1000 smallsats launched per
Dillon O’Reilly +2 more
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Numerical Investigation of the Hydrodynamic Characteristics of 3-Fin Surfboard Configurations
Applied Sciences, 2022 Surfing is a popular sport, with the associated market forecast to reach 2.6 billion US dollars by 2027. In the published literature, there is a range of investigations into the performance of surfboard fins. Some studies model a single fin or review the
Sam Crameri +2 more
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MATHEMATICAL MODELING OF ELECTRIC HEATING ENGINE ON START-UP
Авіаційно-космічна техніка та технологія, 2019 The subject of research in the article is the process of accelerating the working fluid in an electric heating thruster, which is part of the onboard propulsion system used in space tug.
Андрей Владимирович Погудин
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A Directional Microplasma Thruster Exhibiting a Switchable Intense Plasma Coupling
IEEE Access, 2020 Conventional cold and warm gas thrusters with low specific impulses and thrust greatly limit the capability of nanosatellites to conduct meaningful plane and attitude changes in space.
Sung-O Kim +2 more
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