Results 61 to 70 of about 63,437 (256)
Physical Configuration Design of a 10N Monopropellant Hydrazine Thruster [PDF]
فصلنامه علوم و فناوری فضایی, 2019 In this paper, design and physical configuration of various components of a 10N Monopropellant Hydrazine Thruster focusing on design calculations and optimization of catalytic combustion chamber. According to this design, a prototype of the thruster will
Hadiseh Karimaei +3 more
doaj +1 more source
Some Problems of Berthing of Ships with Non-conventional Propulsions [PDF]
TransNav, 2007 The berthing manoeuvre of ship is the last stage of navigation process. The safety of berthing depends on velocity due impact the quay. In case of ships with non-conventional propulsion (mainly two stern screws and few thrust propellers) the berthing ...
Wojciech Koziol, Wieslaw Galor
doaj
Application of the NEXT Ion Thruster Lifetime Assessment to Thruster Throttling [PDF]
44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2008 Ion thrusters are low thrust, high specific impulse devices with typical operational lifetimes of 10,000 to 30,000 hr over a range of throttling conditions. The NEXT ion thruster is the latest generation of ion thrusters under development. The NEXT ion thruster currently has a qualification level propellant throughput requirement of 450 kg of xenon ...
Jonathan Van Noord, Daniel Herman
openaire +1 more source
Plasma beam characterization along the magnetic nozzle of an ECR thruster
Plasma Sources Science & Technology, 2019 Experimental characterization of plasma properties along the magnetic nozzle of an electron cyclotron resonance thruster is presented here. A permanent magnet (PM) prototype and a solenoid prototype are tested, whose main difference relies on the ...
S. Correyero +3 more
semanticscholar +1 more source
Havacılık ve Uzay Teknolojileri Dergisi, 2020 The script in this paper describes the use of propellant for plasma thrusters based on electrostatic accelerator. The generation and control of plasma is essential for the ion thrusters.
Alexander Norbach
doaj
Artificial three-body equilibria for hybrid low-thrust propulsion [PDF]
, 2008 This paper proposes a new concept of creating artificial equilibrium points in the circular restricted three body problem, where the third body uses a hybrid of solar sail and solar electric propulsion.
Baig, Shahid, McInnes, Colin R.
core +1 more source
Dependence of Thruster Configuration on Thrust Performance in Miniature Ion Thruster
JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2008 The effects of antenna shape and magnetic field configuration on thrust performance in a 30W class miniature microwave discharge ion thruster were investigated with the objective of improving its thrust performance. The ion beam currents were measured for three different antenna configurations: disc, star, and cross. The results showed that the optimum
Naoji YAMAMOTO +4 more
openaire +2 more sources
LISA pathfinder micronewton cold gas thrusters: in-flight characterization [PDF]
, 2019 The LISA Pathfinder (LPF) mission has demonstrated the ability to limit and measure the fluctuations in acceleration between two free falling test masses down to sub-femto-g levels. One of the key elements to achieve such a level of residual acceleration
Armano, M. +6 more
core +2 more sources
Experimental Verification of a Depth Controller using Model Predictive Control with Constraints onboard a Thruster Actuated AUV [PDF]
, 2012 In this work a depth and pitch controller for an autonomous underwater vehicle (AUV) is developed. This controller uses the model predictive control method to manoeuvre the vehicle whilst operating within the defined constraints of the AUV actuators ...
Furlong, M. +4 more
core +1 more source
Extended Performance 8-cm Mercury Ion Thruster [PDF]
A slightly modified 8-cm Hg ion thruster demonstrated significant increase in performance. Thrust was increased by almost a factor of five over that of the baseline thruster.
Mantenieks, M. A.
core +1 more source