Results 191 to 200 of about 63,437 (256)
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IEEE Transactions on Systems, Man, and Cybernetics: Systems, 2019
This paper investigates quantized sliding mode control of unmanned marine vehicles (UMVs) with thruster faults and nonlinearities. We give a unified model to accommodate different types of thruster faults (e.g., partial, total, time-varying stuck, hard ...
Liying Hao, He Zhang, G. Guo, Hui Li
semanticscholar +1 more source
This paper investigates quantized sliding mode control of unmanned marine vehicles (UMVs) with thruster faults and nonlinearities. We give a unified model to accommodate different types of thruster faults (e.g., partial, total, time-varying stuck, hard ...
Liying Hao, He Zhang, G. Guo, Hui Li
semanticscholar +1 more source
Performance and plume evolutions during the lifetime test of a Hall-effect thruster
Acta Astronautica, 2020To demonstrate the qualifications of the thruster lifetime, performance and reliability design, an 8000-h ground test of a Hall-effect thruster was conducted.
Junxue Ren +2 more
exaly +2 more sources
Offshore Technology Conference, 1975
ABSTRACT The large powers required for dynamic station keeping of offshore drilling platforms have to be transmitted into the highest possible thrust, exerted at the location and in the direction required. This paper gives information on hydrodynamic characteristics of controllable pitch propellers and thrusters for
C.C. Schneiders, C.C. Pronk
openaire +1 more source
ABSTRACT The large powers required for dynamic station keeping of offshore drilling platforms have to be transmitted into the highest possible thrust, exerted at the location and in the direction required. This paper gives information on hydrodynamic characteristics of controllable pitch propellers and thrusters for
C.C. Schneiders, C.C. Pronk
openaire +1 more source
Vessel Thruster-Thruster Interactions During Azimuthing Operations
24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 2005Flow interaction between thrusters is important, as many offshore vessels are equipped with rotating (azimuthing) thrusters for ease of manoeuvring and dynamic positioning. Accurate prediction of available thrust to resist horizontal environmental forces is essential allowing the realistic station-keeping capability of these vessels to be established ...
D. T. Brown, L. Ekstrom
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Adaptive synchronization for surface vessels with disturbances and saturated thruster dynamics
, 2020This work investigates the adaptive synchronization for the surface vessels with disturbances and saturated thruster dynamics. The vessel movement model becomes the three-order equation with mismatched disturbances due to the inclusion of saturated ...
Xin Hu +3 more
semanticscholar +1 more source
Numerical simulation of thruster-thruster interaction for ROV with vector layout propulsion system
Ocean Engineering, 2020The thruster-thruster interaction in the vector layout propulsion system of a remotely operated vehicle (ROV) should be considered. The influence of the deflection angle, rotation speed, and thrusters (ducted propellers) spacing on the ROV thrust ...
Bin Zhou, Min-sheng Zhao
semanticscholar +1 more source
Water and xenon ECR ion thruster—comparison in global model and experiment
Plasma Sources Science & Technology, 2020Gridded ion thrusters are one of the most commonly used types of electric propulsion, and alternative propellants have been studied for miniature ion thrusters to meet the demand of propulsion systems for micro-/nano-satellites.
Y. Nakagawa +3 more
semanticscholar +1 more source
, 2020
We developed a novel measurement apparatus and data processing technique that allow for the quantitative reconstruction of the effects of breathing mode oscillations on the main properties of the plasma in Hall thrusters. The approach is based on the use
V. Giannetti, M. Saravia, T. Andreussi
semanticscholar +1 more source
We developed a novel measurement apparatus and data processing technique that allow for the quantitative reconstruction of the effects of breathing mode oscillations on the main properties of the plasma in Hall thrusters. The approach is based on the use
V. Giannetti, M. Saravia, T. Andreussi
semanticscholar +1 more source
Plasma Sources Science & Technology, 2019
Since the inception of the Hall-effect thruster more than five decades ago, many theories have been proposed about the source(s) of the anomalous cross-field transport that is known to occur in these devices.
I. Mikellides, A. Lopez Ortega
semanticscholar +1 more source
Since the inception of the Hall-effect thruster more than five decades ago, many theories have been proposed about the source(s) of the anomalous cross-field transport that is known to occur in these devices.
I. Mikellides, A. Lopez Ortega
semanticscholar +1 more source
Electrohydrodynamic thruster for near-space applications
, 2020Studies of the lifting force of an electrohydrodynamic thruster based on a corona discharge in wire-to-cylinder geometry in a rarefied atmosphere have been carried out.
V. Khomich, V. Malanichev, I. Rebrov
semanticscholar +1 more source