Spacecraft maneuvers and slosh control

Vreeburg, J.P.B.

doi:10.1109/mcs.2005.1432593

Cited by 37 publications

(2 citation statements)

References 2 publications

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“…Another example is the liquid sloshing in spacecrafts [7][8][9]. The non-linear sloshing of liquid fuels will exert a tremendous impact on the flight control of spacecrafts [10], which have led to an emphasis on the measurement of liquid surface topography in tanks. In order to solve the liquid sloshing associated with liquid surface deformation, many numerical simulation methods have been developed [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

3D shape measurement of complex transparent liquid surfaces using monoscopic deformed fringe transmissometry

Zhong

Huang

Dong

et al. 2019

Meas. Sci. Technol.

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The measurement of transparent liquid surface topography is of great importance in many fields such as hydrodynamics of water-walking insects, liquid sloshing and flotation, etc. However, techniques for measuring these specular and rheological surfaces, especially for surfaces with floating objects, have been lacking. Here we report a monoscopic deformed fringe transmissometry for measuring complex transparent liquid surfaces with theoretical sensitivity up to 0.40 µm. The basic principle is to reconstruct the 3D liquid surfaces by the mathematical relations between the in-plane fringe phase-shift and the out-of-plane shape of the liquid surface. It only needs to project a single fringe pattern from the bottom of the liquid and capture a single deformed image from above. A sub-pixel sampling moiré method is proposed to process the captured fringe pattern to obtain the precise phase component and the displacement field, which is then used to reconstruct the 3D shape of the liquid surface. The discontinuous fringes in the pattern also settled by covering an extracted mask to the displacement filed. The verification test of floating 3D printed characters indicates that this new technique is robust in measuring the 3D shape of complex liquid surface. The developed technique provides a versatile tool to explore interfacial phenomena such as wetting, floating, surface wave, etc.

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Section: Introductionmentioning

confidence: 99%

3D shape measurement of complex transparent liquid surfaces using monoscopic deformed fringe transmissometry

Zhong

Huang

Dong

et al. 2019

Meas. Sci. Technol.

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show abstract

“…The influence of liquid sloshing may hamper critical maneuvers in space, with a series of failures leading to catastrophe, as exemplified by problems that occurred on the ATS-V spacecraft, Intelsat IV series of spacecraft, the NEAR Shoemaker mission, and Gravity Probe B [16]. As the ratio between propellant and dry mass increases, the impact of sloshing also increases.…”

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confidence: 99%

Accurate Measurement of Nonlinear Liquid Sloshing

et al. 2015

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The accurate measurement of nonlinear liquid sloshing in a liquid-filled spacecraft is of importance for precise flight control. In this paper, a novel noncontact method combining the fringe transmission technique with the liquidlevel reflection technique has been developed to accurately evaluate such behavior. To do this, a printed fringe pattern was first placed underneath a transparent test tank with fabricated calibration tails on the wall and, when viewed from above with a high-speed camera, a series of distorted transmission-fringe images with reflected images of the liquid level at different times during the sloshing process were achieved. Combing the quantitative relationship between the shape of the liquid surface and the distortion of the transmission fringes, as well as considering the height curves of the liquid level, the three-dimensional dynamic deformation field could be calculated using multidirectional Newton iterative algorithms. Both the dynamic deformation field of the liquid surface and the residual liquid volume in the tank could be accurately measured at the same time. An experimental verification was carried out, and the results obtained demonstrated the feasibility and reliability of this new method.Superscripts i, j = index of coordinates in x and y directions n = number of scattered points

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Three‐dimensional modal analysis of sloshing under surface tension

El-Kamali¹,

Schotté²,

Ohayon³

2010

Numerical Methods in Fluids

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SUMMARYThe space structures such as satellites, probes or space stations generally contain large amounts of liquids, which can be propellants, cooling liquids, etc. The motion of these liquids can influence the vibrational behavior of the main structure and can potentially disturb the trajectory controller or the stabilization procedures. To avoid hazardous coupling between the inner liquid sloshing and the main structure movements, engineers need to know precisely the evolution of the inner liquid eigenmodes and eigenfrequencies during the mission. In this aim, we propose here a numerical approach to solve the three-dimensional linear sloshing problem of an incompressible inviscid liquid taking into account the effects of surface tension which are predominant in low-gravity environment. A variational formulation is derived from the linearization of the motion equations of the liquid near its initial equilibrium state (meniscus) and its discretization by the finite element method gives a classical spectral problem, whose solutions are the sloshing eigenmodes. While the majority of authors consider simple geometries of tanks, the advantage of the formulation presented here is to be easily applicable to real three-dimensional cases as it will be demonstrated in some application examples.

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Spacecraft maneuvers and slosh control

Cited by 37 publications

References 2 publications

3D shape measurement of complex transparent liquid surfaces using monoscopic deformed fringe transmissometry

3D shape measurement of complex transparent liquid surfaces using monoscopic deformed fringe transmissometry

Accurate Measurement of Nonlinear Liquid Sloshing

Three‐dimensional modal analysis of sloshing under surface tension

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