Results 71 to 80 of about 295,166 (297)

Optimal Heliocentric Orbit Raising of CubeSats with a Monopropellant Electrospray Multimode Propulsion System

Applied Sciences
A Multimode Propulsion System (MPS) is an innovative spacecraft thruster concept that integrates two or more propulsion modes sharing the same type of propellant.
Alessandro A. Quarta, Marco Bassetto, Giulia Becatti   +2 more
doaj   +1 more source

Digital model of the drag force of the Earth’s upper atmosphere for the design of low-orbit spacecraft

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2023
A digital model is described for estimating the drag force of the Earth's upper atmosphere acting on a low-orbit spacecraft. Unlike the classical model of aerodynamic force, the digital model is the result of a computer algorithm.
V. V. Volotsuev
doaj   +1 more source

Bonding of Hydrogel to Biometal Surfaces: Principles, Methods and Applications

Exploration, EarlyView.
This article reviews the research progress of hydrogel coatings on biometal surfaces, focusing on biometal surface pretreatment methods, hydrogel‐biometal bonding methods, and applications of hydrogel coatings on biometal surfaces. The article also discusses potential future applications of hydrogel coatings on biometal surfaces to provide a broader ...
Yujie Zhou, Luyao Zhang, Shufei Liu, Yan Wei, Yinchun Hu, Xiaojie Lian, Longfei Wang, Ziwei Liang, Weiyi Chen, Xin Xie, Di Huang   +10 more
wiley   +1 more source

Low-Thrust Transfer to Quasi-Synchronous Martian Elliptic Orbit via Nonlinear Feedback Control

Aerospace, 2023
This study considers the problem of injecting a spacecraft into an elliptic, repeating-ground-track orbit about Mars, starting from a 4-sol highly elliptical orbit, which is a typical Martian capture orbit, entered at the end of the interplanetary ...
Riccardo Santoro, Marco Pustorino, Mauro Pontani   +2 more
doaj   +1 more source

Distributed Leader‐Following Formation of Discrete‐Time Multi‐Agent LPV Systems

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper addresses the leader‐following formation consensus problem for multi‐agent systems (MASs) with agents represented by discrete‐time linear parameter‐varying (LPV) models. The scenario where each agent can be modeled with distinct time‐varying scheduling parameters is investigated with respect to compensation signals.
Paulo S. P. Pessim, Pedro H. S. Coutinho, Márcio J. Lacerda, Vicenç Puig, Reinaldo M. Palhares   +4 more
wiley   +1 more source

On Hyperexponential Stabilization of Perturbed Unicycle Dynamics

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT The problem of hyperexponential stabilization for a mobile robot is addressed by leveraging its kinematic model with external perturbations. To this end, a robust nonlinear control law is designed, and several state and time transformations are introduced, reformulating the system model to an interconnection of integrators.
Moussa Labbadi, Denis Efimov
wiley   +1 more source

Numerical Investigation of Flame-Acoustic Interaction at Resonant and Non-Resonant Conditions in a Model Combustion Chamber

Aerospace
Despite considerable research effort in the past 60 years, the occurrence of combustion instabilities in rocket engines is still not fully understood.
Tim Horchler, Stefan Fechter, Justin Hardi   +2 more
doaj   +1 more source

An earth pole-sitter using hybrid propulsion [PDF]

, 2010
In this paper we investigate optimal pole-sitter orbits using hybrid solar sail and solar electric propulsion (SEP). A pole-sitter is a spacecraft that is constantly above one of the Earth's poles, by means of a continuous thrust.
Becerra V. M., Betts J. T., Driver J. M., Fahroo F., Fornberg B., Mengali G., Powell M. J. D., Quarta A. A., Wertz J. R.   +8 more
core   +2 more sources

Perspectives, frontiers, and new horizons for plasma-based space electric propulsion

Physics of Plasmas, 2020
There are a number of pressing problems mankind is facing today that could, at least in part, be resolved by space systems. These include capabilities for fast and far-reaching telecommunication, surveying of resources and climate, and sustaining global ...
I. Levchenko, Shuyan Xu, Stéphane Mazouffre, Dan R. Lev, Daniela Pedrini, Dan M. Goebel, Laurent Garrigues, Francesco Taccogna, K. Bazaka   +8 more
semanticscholar   +1 more source

The Effect of Tip Design on Technological Performance During the Exploration of Earth, Lunar, and Martian Soil Environments

Journal of Field Robotics, EarlyView.
ABSTRACT This paper investigates the penetration performance of soil‐burrowing probes with different tip designs during shallow‐depth penetration in various media, including terrestrial soils (Hostun sand) and well‐characterized planetary soil simulants (LHS‐1 Lunar regolith simulant and MGS‐1 Martian regolith simulant).
Serena Rosa Maria Pirrone, Emanuela Del Dottore, Gunter Just, Barbara Mazzolai, Luc Sibille   +4 more
wiley   +1 more source