Modeling of Parachute Dynamics in a Synthetic Flight Mechanics Simulations Environment

Sudars, Martins; Saluzzi, Antonio; Alenia, Thales

doi:10.2514/6.2009-2943

Cited by 1 publication

(1 citation statement)

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“…The modeling of the re-entry is performed by FMST, 'Flight Mechanics Simulation Tool' 11 . FMST is a Matlab coded package, which has preset vehicle models, gravity and atmospheric models in order to perform trajectory simulations, batch and Monte Carlo analysis of aerospace vehicles.…”

Section: Modelingmentioning

confidence: 99%

Parachute Triggering Algorithms for Reentry Vehicles

Ording

Sudars

Brouwer

2010

AIAA/AAS Astrodynamics Specialist Conference

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Most re-entry vehicles utilize a Descent and Landing System (DLS) for a safe descent through the lowest part of the atmosphere. It usually requires deployment in a certain suitable range of flight conditions, which has to be estimated by limited means of navigation. This paper presents a comparison of currently used trigger methods and triggering algorithms which are based on correlation between in-flight measurements and the DLS triggering conditions, where the correlations have been extracted by multiple Monte Carlo campaigns. This approach gives a significant improvement of triggering accuracy over direct measurements for a ballistic re-entry. Also a lateral g-load safety trigger is developed to prevent the angle of attack oscillation escalation. Furthermore a sensor sensitivity analysis is performed for a lifting entry trajectory in order to support an upcoming ESA re-entry mission. The velocity drift appears to be the dominant dispersion by a factor ten for Mach estimation. Finally a case study has been performed to investigate the possibility to reduce the footprint by a dynamic parachute opening window. This could be effective for Mars reentry using a parachute able to deploy beyond Mach 2.5, which would reduce the footprint by up to several tens of kilometers. Nomenclature

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Section: Modelingmentioning

confidence: 99%