Cable Control of an Aerostat Platform: Experimental Results and Model Validation

Lambert, Casey; Nahon, Meyer; Chalmers, Dean; Gilardi, Gabriele

doi:10.2514/1.22598

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…Assuming that the impact factors are 𝑢 , 𝑢 , ⋯ , 𝑢 , and the forecast object can be obtained by regression analysis. 𝑌 = 𝑏 𝑢 + 𝑏 𝑢 + ⋯ + 𝑏 𝑢 + 𝐸 , (9) where 𝑌 is the observed value of the forecast object. 𝐸 is the error.…”

Section: Arma Modelmentioning

confidence: 99%

“…Given the heterogeneous network paradigm [6] and different applications such as terrestrial communication network [7], mobile marine network [8], aerostat platform [9] and satellite communication networks [10], the form of cyberspace is often complex and heterogeneous, so the re-search of this paper is based on complex-heterogeneous cyberspace [11].…”

Section: Introductionmentioning

confidence: 99%

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Deep Neural Network Based Complex-Heterogeneous Cyberspace Cartographic Visualization

Zhang¹,

Liu²,

Wang³

et al. 2023

J Multimed Inf Syst

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It seems complicated to imagine our life without the Internet, but it is only a few decades old, and the Internet forms the most extensive cyberspace environment. Cyberspace is the non-physical environment created by joint computers inter-operating on a network. The complex heterogeneous cyberspace is a virtual computer world that encompasses a variety of computers, network devices, and systems that have been manufactured by different entities. As an essential spatial cognitive tool, the map has significantly contributed to human civilization for thousands of years. However, the cartographic elements of traditional maps are mostly geospatial entities or phenomena, and only some people apply them to draw abstract and virtual cyberspace resources, resulting in the development of cyberspace cartography lagging. Additionally, the process of data visualization involves the conversion of data into visual forms such as charts and graphs, with the aim of effectively conveying the data's importance. The cartographic visualization is to realize the visual expression of cyberspace, which is an essential basis for understanding cyberspace. Therefore, this paper introduces a deep neural network (DNN) to study complex-heterogeneous cyberspace cartographic visualization. At first, locally linear embedding is adopted to reduce the data dimensionality. Then, DNN is used to train the cartographic coordinates data obtained after data dimensionality reduction. Finally, several different data modeling methods are studied concerning temporal and spatial attributes to achieve complex-heterogeneous cyberspace cartographic visualization effectively. The simulation is powered by datasets sourced from cyberspace, which are accessible via data.world. The results of the simulation demonstrate that the suggested approach is superior in efficiency when compared to the baseline methods.

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Section: Arma Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deep Neural Network Based Complex-Heterogeneous Cyberspace Cartographic Visualization

Zhang¹,

Liu²,

Wang³

et al. 2023

J Multimed Inf Syst

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show abstract

“…Reuse of balloons is obligatory because these comprise the heaviest and most expensive component of the LAS. Also, the positioning of the tethered balloon can be precise to the fraction of meter [54]. Tethers (cables) connected to the high-altitude balloons can be used to accelerate an LVS if needed or simply to deliver launch vehicle to launch altitude before cryogenic propellants will boil off.…”

Section: Proposed Las Conceptmentioning

confidence: 99%

A Low-Cost Launch Assistance System for Orbital Launch Vehicles

Nizhnik¹

2012

International Journal of Aerospace Engineering

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The author reviews the state of art of nonrocket launch assistance systems (LASs) for spaceflight focusing on air launch options. The author proposes an alternative technologically feasible LAS based on a combination of approaches: air launch, high-altitude balloon, and tethered LAS. Proposed LAS can be implemented with the existing off-the-shelf hardware delivering 7 kg to low-earth orbit for the 5200 USD per kg. Proposed design can deliver larger reduction in price and larger orbital payloads with the future advances in the aerostats, ropes, electrical motors, and terrestrial power networks.

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“…Modeling of tethered aerostats has been proposed for a variety of systems, including 2-D analysis of aerostats in response to vertical gusts [5], tethered high-altitude balloons [6], and tritethered systems [7,8]. In all cases, the aerostat has a similar model that includes aerodynamics, buoyancy, and apparent mass whereas significantly different approaches are taken in modeling the tether.…”

mentioning

confidence: 99%

“…Although the tether is continuous, it is often modeled using discrete elements. The simplest aerostat-tether models use lumped-mass bodies connected with elastic elements [7,8] where each mass has only 3 degrees of freedom (DOF). A similar lumped-mass approach was used by Frost and Costello [9] when modeling connected munitions.…”

mentioning

confidence: 99%

Tethered Aerostat Modeling Using an Efficient Recursive Rigid-Body Dynamics Approach

Hembree

Slegers

2011

Journal of Aircraft

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Cable Control of an Aerostat Platform: Experimental Results and Model Validation

Cited by 5 publications

References 10 publications

Deep Neural Network Based Complex-Heterogeneous Cyberspace Cartographic Visualization

Deep Neural Network Based Complex-Heterogeneous Cyberspace Cartographic Visualization

A Low-Cost Launch Assistance System for Orbital Launch Vehicles

Tethered Aerostat Modeling Using an Efficient Recursive Rigid-Body Dynamics Approach

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