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25 Results Found

  • Article
  • Open Access
1,054 Views
22 Pages

Natural Frequencies of a Tethered Satellite System

  • Yihun Yoon,
  • Woojae Jang and
  • Jintai Chung

18 February 2025

This study investigated the natural frequencies of a tethered satellite system to enhance stability and operational reliability. Tethered satellite systems provide many advantages for space missions but exhibit inherently complex dynamics due to the...

  • Article
  • Open Access
2 Citations
2,299 Views
9 Pages

9 July 2022

The high-regioselective synthesis of bisadducts based on low-symmetry C70 has been a challenging work due to the large amount of formed regioisomers, which require tedious separation procedures for isomeric purity and block their application in diffe...

  • Article
  • Open Access
2 Citations
3,808 Views
22 Pages

22 November 2018

Recently, advancements in space technology have opened up more opportunities for human beings to work in outer space. It is expected that upsizing of manned space facilities, such as the International Space Station, will further this trend. Therefore...

  • Article
  • Open Access
11 Citations
4,495 Views
14 Pages

23 December 2021

In recent years, Tethered Space Systems (TSSs) have received significant attention in aerospace research as a result of their significant advantages: dexterousness, long life cycles and fuel-less engines. However, configurational conversion processes...

  • Article
  • Open Access
1 Citations
2,873 Views
15 Pages

Contact Analysis of Mobility Devices Based on Tension

  • Satoshi Takayama,
  • Shoichiro Takehara and
  • Ryota Yuasa

20 August 2021

Advances in space technology have opened up opportunities for human beings to work in outer space. It is expected that the upsizing of manned space facilities, such as the International Space Station, will further this trend. A unique means of transp...

  • Article
  • Open Access
2 Citations
2,386 Views
18 Pages

17 October 2024

This study investigates the dynamic behavior of a three-body tethered satellite system with a flexible tether, focusing on a scenario in which a payload is transported along the tether connecting two satellites. Traditional models use rigid tethers,...

  • Article
  • Open Access
29 Citations
6,269 Views
18 Pages

11 January 2022

The space debris problem poses a huge threat to operational satellites and has to be addressed. Multiple removal methods have been proposed to keep Earth’s orbit stable. Flexible connection capturing methods, such as the harpoon system, tether&...

  • Article
  • Open Access
3 Citations
2,395 Views
16 Pages

14 October 2022

One of the important applications of the space tethered system is formation flying. To satisfy the requirement for interferometry of ground targets by remote-sensing satellites, a new type of tethered solar sail spacecraft has been proposed in recent...

  • Article
  • Open Access
701 Views
18 Pages

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

  • Cong Xue,
  • Qiao Shi,
  • Hecun Zheng,
  • Baizheng Huan,
  • Weiran Yao,
  • Yankun Wang and
  • Xiangyu Shao

9 October 2025

This paper presents a rigid–flexible coupling dynamic modeling framework and a fixed-time control strategy for a flexible space-tethered satellite (STS) system. A high-fidelity rigid–flexible coupling dynamic model of STS is developed usi...

  • Article
  • Open Access
2 Citations
4,147 Views
18 Pages

In case of a fire at a high-rise building which is densely populated, an extension ladder is used to rescue people who have yet to evacuate to a safe place away from the fire, whereas those who are stranded at a height that is unreachable with the la...

  • Article
  • Open Access
3 Citations
1,611 Views
27 Pages

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. A nonlinear flexib...

  • Article
  • Open Access
3 Citations
2,730 Views
29 Pages

5 October 2024

Weather survival poses a significant challenge for the utilization of tethered balloons. The dynamic modeling of tethered balloon systems presents challenges due to the flexible nature of the cables and the intricate nature of gust forces. The presen...

  • Article
  • Open Access
5 Citations
4,247 Views
12 Pages

17 August 2020

The behavior of nanogels in suspension can be dramatically affected by the grafting of a canopy of end-tethered polymer chains. The architecture of the interfacial layer, defined by the grafting density and length of the polymer chains, is a crucial...

  • Article
  • Open Access
4 Citations
4,676 Views
21 Pages

Comparing Models of Lateral Station-Keeping for Pitching Hydrofoils

  • Peter Gunnarson,
  • Qiang Zhong and
  • Daniel B. Quinn

Fish must maneuver laterally to maintain their position in schools or near solid boundaries. Unsteady hydrodynamic models, such as the Theodorsen and Garrick models, predict forces on tethered oscillating hydrofoils aligned with the incoming flow. Ho...

  • Review
  • Open Access
4 Citations
3,724 Views
30 Pages

26 September 2024

Chiral pincer complexes, characterized by their rigid tridentate coordination framework, have emerged as powerful catalysts in asymmetric synthesis. This review provides a comprehensive overview of recent advancements in the development of chiral pin...

  • Article
  • Open Access
6 Citations
2,700 Views
15 Pages

A Hybrid Soft Actuator Inspired by Grass-Spike: Design Approach, Dynamic Model, and Applications

  • Dong-Woon Choi,
  • Cho-Won Lee,
  • Duk-Yeon Lee,
  • Dong-Wook Lee and
  • Han-Ul Yoon

28 November 2020

This paper presents the bio-mimetic design approach, the dynamic model, and potential applications for a hybrid soft actuator. The proposed hybrid soft actuator consists of two main parts: a cylinder-shaped rigid core and soft silicone spikes wrapped...

  • Article
  • Open Access
9 Citations
4,119 Views
41 Pages

Flight Stability of Rigid Wing Airborne Wind Energy Systems

  • Filippo Trevisi,
  • Alessandro Croce and
  • Carlo E. D. Riboldi

17 November 2021

The flight mechanics of rigid wing Airborne Wind Energy Systems (AWESs) is fundamentally different from the one of conventional aircrafts. The presence of the tether largely impacts the system dynamics, making the flying craft to experience forces wh...

  • Article
  • Open Access
10 Citations
2,966 Views
16 Pages

Dynamic Stability of an Ocean Current Turbine System

  • Shueei-Muh Lin,
  • Yang-Yih Chen,
  • Hung-Chu Hsu and
  • Meng-Syue Li

6 September 2020

This paper presents a theoretical solution for the dynamic stability of the ocean current turbine system developed in Taiwan. This system is tethered to the sea floor and uses the Kuroshio Current to produce electricity. To maintain the performance o...

  • Article
  • Open Access
608 Views
19 Pages

16 October 2025

Airborne Wind Energy (AWE) systems offer benefits such as high altitude access to stronger and more stable winds, reduced environmental impact, and cost effective infrastructure. However, these systems face several challenges including complex flight...

  • Article
  • Open Access
2 Citations
2,354 Views
13 Pages

7 November 2022

The dynamical response of a tethered semiflexible polymer with self-attractive interactions and subjected to an external force field is numerically investigated by varying stiffness and self-interaction strength. The chain is confined in two spatial...

  • Review
  • Open Access
15 Citations
10,667 Views
22 Pages

A Systematic Review of Locomotion Assistance Exoskeletons: Prototype Development and Technical Challenges

  • Weiqi Lin,
  • Hui Dong,
  • Yongzhuo Gao,
  • Wenda Wang,
  • Yi Long,
  • Long He,
  • Xiwang Mao,
  • Dongmei Wu and
  • Wei Dong

Exoskeletons can track the wearer’s movements in real time, thereby enhancing physical performance or restoring mobility for individuals with gait impairments. These wearable assistive devices have demonstrated significant potential in both reh...

  • Article
  • Open Access
15 Citations
4,140 Views
17 Pages

A new topological design of fluorescent probes for sensing copper ion is disclosed. The calix[4]arene-oxacyclophane (Calix-OCP) receptor, either wired-in-series in arylene-alt-ethynylene conjugated polymers or standing alone as a sole molecular probe...

  • Article
  • Open Access
636 Views
17 Pages

Self-Consistent Field Modeling of Bottle-Brush with Aggrecan-like Side Chain

  • Ivan V. Mikhailov,
  • Ivan V. Lukiev,
  • Ekaterina B. Zhulina and
  • Oleg V. Borisov

14 October 2025

Bottle-brush polymers with aggrecan-like side chains represent a class of biomimetic macromolecules that replicate key structural and functional features of natural complexes of aggrecans with hyaluronic acid (HA) which are the major components of ar...

  • Article
  • Open Access
8 Citations
3,927 Views
17 Pages

Three-Dimensional Unsteady Aerodynamic Analysis of a Rigid-Framed Delta Kite Applied to Airborne Wind Energy

  • Iván Castro-Fernández,
  • Ricardo Borobia-Moreno,
  • Rauno Cavallaro and
  • Gonzalo Sánchez-Arriaga

2 December 2021

The validity of using a low-computational-cost model for the aerodynamic characterization of Airborne Wind Energy Systems was studied by benchmarking a three-dimensional Unsteady Panel Method (UnPaM) with experimental data from a flight test campaign...

  • Article
  • Open Access
17 Citations
6,189 Views
19 Pages

20 May 2018

In recent years, many oil and gas fields have been discovered in ultra-deep sea (UDS). Some of these fields are evaluated to have no commercial value if existing oil field development approaches are used, especially while the oil prices remain low. A...