Effects of Magnetic Shielding Configuration on Discharge Characteristics and Performance of a 60 mm-Diameter Low-Power Hall Thruster [PDF]
Journal of Aerospace Technology and Management, 2021 Lifetime is a main factor restraining the application of low-power Hall thruster. Magnetic shielding configuration is regarded as a promising method to prolong the lifespan of Hall thruster.
Weilong Guo +4 more
doaj +3 more sources
STF-based diagnosis of AUV thruster faults [PDF]
E3S Web of Conferences, 2022 The diagnosis of thruster faults of autonomous underwater vehicles is studied in this paper. Based on the theory of strong tracking filter (STF), the AUV motion model and the thruster fault model are established.
Jiang Chunmeng +5 more
doaj +1 more source
Pulse-mode Performance Evaluation of a Monopropellant Hydrazine Thruster [PDF]
علوم، فناوری و کاربردهای فضایی, 2023 In this study, the pulse mode performance of a monopropellant hydrazine thruster has been studied. For this purpose, a laboratory sample of a monopropellant hydrazine thruster under atmospheric pressure was fabricated and tested.
mohamad ali amirifar +3 more
doaj +1 more source
Experimental Investigation of the Performance of a Monopropellant Hydrazine Thruster in Atmospheric Conditions [PDF]
علوم، فناوری و کاربردهای فضایی, 2022 In this research, the performance of a monopropellant hydrazine thruster in atmospheric conditions has been investigated experimentally. For this purpose, after designing and constructing the thruster according to the functional requirements of the ...
mohamad ali amirifar +4 more
doaj +1 more source
Impact of Hydrogen Peroxide Concentration on Manganese Oxide and Platinum Catalyst Bed Performance
Aerospace, 2023 This study investigates the use of MnxOy/Al2O3 and Pt/Al2O3 catalysts for the decomposition of hydrogen peroxide in thrusters. It describes the purpose, procedures, performance, and conclusions coming from the test campaign of the catalyst lifetimes.
Adrian Parzybut +2 more
doaj +1 more source
A fault diagnostic approach based on PSO-HMM for underwater thrusters
Mathematical Biosciences and Engineering, 2022 In this paper, we describe an approach based on improved Hidden Markov Model (HMM) for fault diagnosis of underwater thrusters in complex marine environments.
Zhenzhong Chu +4 more
doaj +1 more source
Design and Configuration of Ground Sample Components of Low Propulsion Monopropellant Thruster Using Some Engineering Software [PDF]
فصلنامه علوم و فناوری فضایی, 2021 Monopropellant thruster are used to inject a satellite into orbit or control its position on three axes in space missions. One of them is hydrazine thruster which is widely used.
Sajjad Davari +3 more
doaj +1 more source
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
doaj +3 more sources
Naphthalene as a Cubesat Cold Gas Thruster Propellant
Frontiers in Physics, 2020 The “cubesat” form factor (multiples of 10 × 10 × 10 cm3 volume and 1.33 kg mass) has been adopted as the defacto standard for a cost effective and modular, nano-satellite platform.
Dimitrios Tsifakis +2 more
doaj +1 more source
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
doaj +1 more source