[Dottorcomp] Fwd: Avviso di seminario

[Stefano Lisini]

Segnalo il seguente seminario online organizzato dal Politecnico di Milano.

Da: Iniziative di Dipartimento <giovanni.catino a polimi.it>
Oggetto: Avviso di seminario
Data: 1 febbraio 2021 18:30:57 CET
Rispondi a: Iniziative di Dipartimento <giovanni.catino a polimi.it>

Si avvisa che in data 2/2/2021, alle ore 11:15 , presso
https://polimi-it.zoom.us/j/83891252320?pwd=aS9Oa3V5aktwWGExa3lwZnFBYm9kUT09,
nell'ambito delle iniziative della sezione di Analisi, si svolgerà il
seguente seminario:

Titolo: Minimal time optimal control for the moon lander problem
Relatore: Elsa Marchini, Politecnico di Milano
Abstract:
We study a variant of the classical safe landing optimal control
problem in aerospace, introduced by Miele in the Sixties, where the
target was to land a spacecraft on the moon by minimizing the
consumption of fuel. Assuming that the spacecraft has a failure and
that the thrust (representing the control) can act in both vertical
directions, the new target becomes to land safely by minimizing time,
no matter of what the consumption is. In dependence of the initial
data (height, velocity, and fuel), we prove that the optimal control
can be of four different kinds, all being piecewise constant. Our
analysis covers all possible situations, including the nonexistence of
a safe landing strategy due to the lack of fuel or for
heights/velocities for which also a total braking is insufficient to
stop the spacecraft.
This talk is based on a joint work with Filippo Gazzola