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Modeling, Simulation, and Parameter Estimation of Lateral Spacecraft Fuel Slosh
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Modeling, Simulation, and Parameter Estimation of Lateral Spacecraft Fuel Slosh
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Modeling, Simulation, and Parameter Estimation of Lateral Spacecraft Fuel Slosh
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Conference Proceeding
Modeling, Simulation, and Parameter Estimation of Lateral Spacecraft Fuel Slosh
2008
Overview
Predicting the effect of fuel slosh on a spacecraft and/or launch vehicle attitude control system is a very important and a challenging task. Whether the spacecraft is under spinning or lateral moving conditions, the dynamic effect of the fuel slosh will help determine whether the spacecraft will remain on its chosen trajectory. There are three categories of slosh that can be caused by launch vehicle and/or spacecraft maneuvers when the fuel is in the presence of an acceleration field. These include bulk fluid motion, subsurface wave motion, and free surface slosh. Each of these slosh types have a periodic component that is defined by either a spinning or lateral motion. For spinning spacecraft, all three types of slosh can play a major role in determining stability. Bulk fluid motion and free surface slosh can affect the lateral slosh characteristics. For either condition, the possibility for an unpredicted coupled resonance between the spacecraft and its on board fuel can have mission threatening affects. This on-going research effort aims at improving the accuracy and efficiency of modeling techniques used to predict these types of lateral fluid motions. In particular, efforts will focus on analyzing the effects of viscoelastic diaphragms on slosh dynamics.
Publisher
NASA/Langley Research Center
