Results 61 to 70 of about 15,749 (218)

The Maintenance of Orbital States in a Floating Partial Space Elevator Using the Reinforcement Learning Method

open access: yesAerospace
A partial space elevator (PSE) is a multi-body tethered space system in which the main satellite, typically an ultra-large spacecraft or a space station in a higher orbit, is connected to a transport spacecraft in a lower orbit via a tether, maintaining ...
Weili Xu, Xuerong Yang, Gefei Shi
doaj   +1 more source

Tethered satellite system [PDF]

open access: yes
A reusable system is to be developed to enable a variety of scientific investigations to be accomplished from the shuttle, considering the use of a tethered system with manual or automated control, deployment of a satellite toward or away from the Earth,
Sisson, J.
core   +1 more source

Multimodal Locomotion of Soft Robots

open access: yesAdvanced Intelligent Systems, EarlyView.
This review comprehensively surveys recent advances in multimodal locomotion within soft robotics. Typical locomotion modes are summarized and categorized. Furthermore, the underlying mechanisms enabling multimodal locomotion are discussed and classified into three primary categories: active control‐based, reconfiguration‐based, and environment ...
Zihao Yuan   +4 more
wiley   +1 more source

Recoverable Plasma Diagnostics Package (RPDP) [PDF]

open access: yes
The recoverable plasma diagnostics package (RPDP) is an ejectable and recoverable satellite with flight and ground support systems so that it can be utilized in three modes: attached to an remote manipulator system; tethered; or as a subsatellite.
Roberts, W. T.
core   +4 more sources

Aerodynamic calculations related to tethered sub-satellite experiments [PDF]

open access: yes
The results are presented of four aerodynamic studies that were in support of a broader, preliminary inquiry concerning the potential use of downward-deployed tethered sub-satellites for in-flight aerothermodynamic research.
Potter, J. Leith, Rockaway, J. Kent
core   +1 more source

Tethered satellite control mechanism [PDF]

open access: yes, 1983
The tethered satellite control mechanisms consist of four major subsystems. The reel drive mechanism stores the tether. It is motor driven and includes a level wind to uniformly feed the tether to the reel.
Kyrias, G. M.
core   +1 more source

Tethered Satellite System (TSS) core equipment [PDF]

open access: yes
To date, three Tethered Satellite System (TSS) missions of the Italian provided scientific satellite orbiting in the ionosphere connected to U.S. Space Shuttle is foreseen.
Bonifazi, C.
core   +1 more source

First evaluation of the main parameters in the dynamics of the Small Expendable Deployer System (SEDS) for a tethered satellite [PDF]

open access: yes, 1990
The dynamics of the motion of the Small Expendable Deployer System (SEDS) is studied by using a simplified model in which no external forces (except the gravity gradient field) are applied on the tethered body and the tether is assumed massless.
Deluca, Luigi
core   +1 more source

Sum-Rate Analysis for High Altitude Platform (HAP) Drones with Tethered Balloon Relay [PDF]

open access: yes, 2017
High altitude platform (HAP) drones can provide broadband wireless connectivity to ground users in rural areas by establishing line-of-sight (LoS) links and exploiting effective beamforming techniques.
Magarini, Maurizio   +4 more
core   +2 more sources

Long-Duration Inspection of GNSS-Denied Environments with a Tethered UAV-UGV Marsupial System

open access: yesDrones
Unmanned Aerial Vehicles (UAVs) have become essential tools in inspection and emergency response operations due to their high maneuverability and ability to access hard-to-reach areas. However, their limited battery life significantly restricts their use
Simón Martínez-Rozas   +4 more
doaj   +1 more source

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