Results 51 to 60 of about 295,166 (297)
Generation of optimal trajectories for Earth hybrid pole sitters [PDF]
, 2011 A pole-sitter orbit is a closed path that is constantly above one of the Earth's poles, by means of continuous low thrust. This work proposes to hybridize solar sail propulsion and solar electric propulsion (SEP) on the same spacecraft, to enable such a ...
Becerra V. M. +12 more
core +1 more source
Review of State-of-the-Art Green Monopropellants: For Propulsion Systems Analysts and Designers
Aerospace, 2021 Current research trends have advanced the use of “green propellants” on a wide scale for spacecraft in various space missions; mainly for environmental sustainability and safety concerns.
A. Nosseir, A. Cervone, A. Pasini
semanticscholar +1 more source
Advanced Materials, EarlyView.Biological and biologically‐inspired functional nanostructures with structural, thermal, optical, and sensing applications are reviewed. The role of nanoscale features in biological materials on performance is described, and their blueprints are used for bio‐inspired nanomaterials, synthesized using advanced techniques (i.e., photolithography, bio ...
Chao Hsuan (Joseph) Sung +15 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz +5 more
wiley +1 more source
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроениеThe problem of selecting suboptimal parameters of an electric propulsion system as part of a spacecraft, ensuring a geostationary orbit raising mission using a Soyuz-5 launch vehicle at the initial launch stage, is investigated. An expression is obtained
A. V. Kolesov, V. V. Salmin
doaj +1 more source
Retarding potential analyzer: Principles, designs, and space applications
AIP Advances, 2020 The main emphasis of this paper is on the use of Retarding Potential Analyzers (RPAs) for measuring the electron and ion distribution functions, density, and temperature of space plasmas and the charging level of spacecraft surfaces interacting with the ...
Shu T. Lai, Catherine Miller
doaj +1 more source
E-Sail Optimal Trajectories to Heliostationary Points
Aerospace, 2023 The aim of this paper is to investigate the performance of a robotic spacecraft, whose primary propulsion system is an electric solar wind sail (E-sail), in a mission to a heliostationary point (HP)—that is, a static equilibrium point in a heliocentric ...
Alessandro A. Quarta, Giovanni Mengali
doaj +1 more source
Advanced Materials Technologies, EarlyView.This study develops a 3D optical sensor formed by mechanical buckling and equipped with wireless communication for navigation. Off‐the‐shelf electronic components are assembled onto a flexible circuit board, followed by mechanical strain‐guiding, facilitating the integration of an out‐of‐plane sensing configuration with a signal processing module. This
Chi Cong Nguyen +10 more
wiley +1 more source
Trajectory-correction propulsion system Patent [PDF]
, 1966 Spacecraft trajectory correction propulsion ...
Schmitz, B. W., Smith, W. W.
core +1 more source
A Resistive Soft Robotic Exosuit for Dynamic Body Loading in Hypogravity
Advanced Science, EarlyView.The resistive hypogravity exosuit is a lightweight wearable robotic exosuit that uses pneumatic artificial muscles to restore Earth‐like metabolic and muscular demands during locomotion in low gravity. Tested on healthy subjects in Earth and simulated Moon gravity, the suit restores energy expenditure and muscle activation without altering gait ...
Emanuele Pulvirenti +6 more
wiley +1 more source