Results 31 to 40 of about 1,773 (142)

Putting It All Together: Adding Value to the Global Ocean and Climate Observing Systems With Complete Self-Consistent Ocean State and Parameter Estimates

Frontiers in Marine Science, 2019
In 1999, the consortium on Estimating the Circulation and Climate of the Ocean (ECCO) set out to synthesize the hydrographic data collected by the World Ocean Circulation Experiment (WOCE) and the satellite sea surface height measurements into a complete
Patrick Heimbach, Patrick Heimbach, Patrick Heimbach, Ichiro Fukumori, Christopher N. Hill, Rui M. Ponte, Detlef Stammer, Carl Wunsch, Carl Wunsch, Jean-Michel Campin, Bruce Cornuelle, Ian Fenty, Gaël Forget, Armin Köhl, Matthew Mazloff, Dimitris Menemenlis, An T. Nguyen, Christopher Piecuch, David Trossman, Ariane Verdy, Ou Wang, Hong Zhang   +21 more
doaj   +1 more source

Dynamics and Staged Deployment Strategy for a Spinning Tethered Satellite System

Aerospace
This paper investigates flexible multibody dynamic modeling and a staged deployment strategy for large-scale spinning tethered satellite systems, targeting deployment instability, inefficiencies, and tension-induced fracture risks.
Yue Zhang, Kai Chen, Jiawen Guo, Cheng Wei   +3 more
doaj   +1 more source

Dynamic analysis of the tethered satellite system considering uncertain but bounded parameters

Defence Technology
Dynamic analysis of the tethered satellite system (TSS) can provide a fundamental guideline to the evaluation of performance and robust design of the system examined.
Xin Jiang, Zhengfeng Bai
doaj   +1 more source

Controlled Deployment of a Tethered Satellite System [PDF]

PAMM, 2003
AbstractThe deployment of a tethered satellite system undoubtedly represents one of the most critical phases in a tether mission: due to its complicated dynamics, high amplitude oscillations are likely to rise in the system, and it will take a long time to reach the desired stable radial equilibrium state.
openaire   +1 more source

Non-linear Free Periodic Oscillations Of A Tethered Satellite System [PDF]

Journal of Sound and Vibration, 1994
Abstract This paper deals with the non-linear dynamics of a tethered satellite system, with particular reference to periodic transverse oscillations. The motion is governed by two integro-differential equations with quadratic non-linear terms associated to gyroscopic forces. Notwithstanding the weakness of the non-linearities, the closeness of the in-
LUONGO, Angelo, Vestroni F.
openaire   +3 more sources

Fixed-Time Attitude Control for a Flexible Space-Tethered Satellite via a Nonsingular Terminal Sliding-Mode Controller

Aerospace
This paper presents a rigid–flexible coupling dynamic modeling framework and a fixed-time control strategy for a flexible space-tethered satellite (STS) system.
Cong Xue, Qiao Shi, Hecun Zheng, Baizheng Huan, Weiran Yao, Yankun Wang, Xiangyu Shao   +6 more
doaj   +1 more source

Model and Dynamic Analysis of a Three-Body Tethered Satellite System in Three Dimensions

Applied Sciences
The three-body tethered satellite system is a new potential technology for the purposes of orbital transportation. In contrast to conventional orbit transfer methods, this system is expected to transport space supplies to a predetermined orbital altitude
Teng He, ZhanXia Zhu
doaj   +1 more source

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

Aerospace
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

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

Drones
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, David Alejo, José Javier Carpio, Fernando Caballero, Luis Merino   +4 more
doaj   +1 more source

Feedback Control for Satellite Orbit Transfer by a Tethered Satellite System

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2009
This study deals with co-planar orbital transfer of a satellite using a tether extension/retrieval mechanism. By controlling the pitch motion of the tether system, the designated velocity increment for the orbital transfer can be achieved at a prescribed position in orbit.
HOKAMOTO, Shinji, KOGA, Shohei
openaire   +2 more sources