ACROSS–DataScience

Znanstveni centar izvrsnosti za znanost o podatcima i kooperativne sustave

Centar ACROSS-DataScience djeluje kao središte suradnje akademske zajednice s poslovnim i javnim sektorom u istraživanju i razvoju novih metodologija i naprednih inženjerskih pristupa za znanost o podatcima i kooperativne sustave.


Poziv na predavanje "Computer...

Pozivamo Vas na predavanje u okviru istraživačkog seminara istraživačke jedinice za znanost o podacima:

"Computer simulation in space flight dynamics"

koje će održati prodekan za istraživanje Instituta za elektroniku i matematiku Moskovskog državnog ekonomskog sveučilišta, dr. Sergey A. Aksenov. Predavanje će se održati u utorak, 4. prosinca 2018. godine, u 14.00 sati, u Sivoj vijećnici Fakulteta elektrotehnike i računarstva Sveučilišta u Zagrebu.

Predavanje je otvoreno za sve zainteresirane, a posebno pozivamo studente.

Više informacija o predavanju i predavaču pogledajte u opširnijem sadržaju obavijesti.

Sažetak predavanja:

The talk will be oriented towards ballistic aspect of trajectory design for space missions. High-energy geocentric orbits can be drastically modified with lunar swingbys and small propulsive maneuvers, especially near the collinear Sun-Earth and Earth-Moon Lagrangian points. Lagrangian points (or libration points) are the equilibrium points in restricted three body problem describing the motion of an infinitesimal mass body in a system of two massive bodies rotating around their barycenter. An infinitesimal body placed in a collinear Lagrangian point remains motionless in respect to the massive bodies. Moreover, the occurrence of periodic or quasiperiodic motion around the Lagrangian point is possible for specific initial conditions. Since this motion is very unstable, direct numerical integration cannot be used to obtain quasiperiodic orbit around the Lagrangian point. In this talk the numerical algorithm for calculation of periodic or quasi-periodic orbits around a collinear Lagrangian point will be proposed. This is achieved by the elimination of unstable component of the motion using small corrections of a state vector. This approach was applied to simulation and study of a quasiperiodic motion around the L2 Lagrangian point of the Sun Earth system. Generalizing the results of the simulations the relation between the initial conditions and the resulting orbit type and characteristics was studied. The domains of initial conditions that correspond to various types of orbits have been described. Along with the domains corresponding to well-known quasi periodic (Lissajous Orbits and Quasi Halo Orbits) and periodic orbits (Halo Orbits, Vertical Liapunov orbits and Horisontal Liapunov orbits) the initial conditions subdomains corresponding to periodic resonant orbits in Quasi-Halo domain are described.

Životopis predavača možete vidjeti na: https://www.hse.ru/en/staff/aksenov

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