A Space Free-Flying Robot (SFFR) includes an actuated base equipped with one or more manipulators to perform on-orbit missions. Distinct from fixed-based manipulators, the spacecraft (base) of a SFFR responds to dynamic reaction forces due to manipulator motions. In order to control such a system, it is essential to consider the dynamic coupling between the manipulators and the base. Explicit d...

In the paper a new method for computer aided modelling and identification of flow dynamics in molten glass is presented and numerically analysed. The process of the construction of the model occurs in several steps on which the sub-models with differentiated mathematical descriptions (with distributed or lumped differential equations) and dynamical features (with inertial and oscillatory charac...

A semi-analytic study on two-layered liquid sloshing in a horizontal excited two-dimensional rectangular tank with elastic baffle was performed. The present work is further development of the semi-analytical technique for solving single-layer problem. located lower or upper liquid. First, complex domain baffled divided into several simple sub-domains to solve analytic solution. wet mode present...

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In the present work damping effect of sloshing flows in tanks subjected to vertical harmonic oscillations is modelled through Smoothed Particle Hydrodynamics (SPH) numerical method. The prediction energy dissipation these problems interest, among others, aeronautic field appropriately address sloshing-induced loads on aircraft wings. To this purpose, an enhanced SPH scheme applied and extensive...

We present a method to compute and visualize the curvature and torsion scalar fields derived from a vector field defined on a multi-block curvilinear grid. In order to compute the curvature and torsion fields, we define a uniform Cartesian grid of points in the volume occupied by the curvilinear grid and interpolate from the curvilinear grid to the Cartesian grid to get the vector field at the ...

The sloshing phenomenon is an important field of fluid dynamics in liquid storage tanks under earthquake excitation. When the frequency gets close to tank’s natural frequency, resulting resonance could lead instability and even damage structures, followed by catastrophic economic losses environmental damages. As passive control devices, baffles are a place for energy dissipation. This study use...

In movies or on TV, a wheel can seem to rotate backwards, due to the temporal subsampling inherent in the recording process (the wagon wheel illusion). Surprisingly, this effect has also been reported under continuous light, suggesting that our visual system, too, might sample motion in discrete "snapshots." Recently, these results and their interpretation have been challenged. Here, we investi...