Design and Testing of an Airbag Landing Attenuator System for a Generic Crew Return Vehicle

Cooper, Michelle H.; Sinclair, Robert; Sanders, John C.; Frigerio, Jacapo

doi:10.2514/6.2005-1616

Cited by 3 publications

(4 citation statements)

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“…Crush load orientation Rigid cell-wall (web) Rotationally flexible hinge In order to avoid bottoming out, which is an inevitable negative aspect of vented airbags; a hybrid airbag approach was proposed [5]. The system consists of an internal nonvented bag (anti-bottoming) within a larger external vented bag (energy absorber).…”

Section: Presented At the American Helicopter Society 63mentioning

confidence: 99%

“…Vented bags are generally more efficient energy dissipaters, when compared to non-vented systems. These can be grouped into two general categories: automobile type airbags [2], which rely on time sensitive deployment in order to operate correctly, and bags with blow-out plugs [1,5] which vent when a predetermined pressure is sensed. Unfortunately, when used on aircraft to improve crashworthiness, serious reliability issues can offset potential advantages in energy absorption.…”

Section: Presented At the American Helicopter Society 63mentioning

confidence: 99%

“…The first category consists of deployable devices such as hydraulic or pneumatic landing gears, vented airbags [1,2], non-vented airbags [3,4], and hybrid airbag systems [5]. Non deployable, or passive, energy absorbers belong to the second category which includes crushable honeycombs and cellular solids [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Deployable System for Crash—Load Attenuation

Kellas¹,

Jackson²

2010

J. Am. Helicopter Society

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An externally deployable honeycomb structure is investigated with respect to crash energy management for light aircraft. The new concept utilizes an expandable honeycomb-like structure to absorb impact energy by crushing. Distinguished by flexible hinges between cell wall junctions that enable effortless deployment, the new energy absorber offers most of the desirable features of an external airbag system without the limitations of poor shear stability, system complexity, and timing sensitivity. Like conventional honeycomb, once expanded, the energy absorber is transformed into a crush efficient and stable cellular structure. Other advantages, afforded by the flexible hinge feature, include a variety of deployment options such as linear, radial, and/or hybrid deployment methods. Radial deployment is utilized when omnidirectional cushioning is required. Linear deployment offers better efficiency, which is preferred when the impact orientation is known in advance. Several energy absorbers utilizing different deployment modes could also be combined to optimize overall performance and/or improve system reliability as outlined in the paper. Results from a series of component and full scale demonstration tests are presented as well as typical deployment techniques and mechanisms. LS-DYNA analytical simulations of selected tests are also presented.

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Section: Presented At the American Helicopter Society 63mentioning

confidence: 99%

Section: Presented At the American Helicopter Society 63mentioning

confidence: 99%

See 1 more Smart Citation

Deployable System for Crash—Load Attenuation

Kellas¹,

Jackson²

2010

J. Am. Helicopter Society

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“…Figure 8 shows the airbag conceptual design. 4 Each airbag consists of permanently inflated bags inside of venting bags. The venting bags utilize customized orifices that release compressed gases upon impact, controlling gas flow rates to maximize efficiency.…”

Section: B2 Airbag Testing Modelmentioning

confidence: 99%