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UID:0-268@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20201230T163000

DTEND;TZID=Asia/Jerusalem:20201230T173000

DTSTAMP:20230525T064227Z

URL:https://aerospace.technion.ac.il/events/neighboring-extremal-path-appl
 ications-for-rocket-trajectory-shaping/

SUMMARY:Neighboring Extremal Path Applications for Rocket Trajectory Shapin
 g
DESCRIPTION:Lecturer:Mor Rosenheim\n Faculty:Department of Aerospace Engine
 ering\n Institute:Technion – Israel Institute of Technology\n Location:h
 ttps://technion.zoom.us/j/98155466137?pwd=WHFrUXFvNDQzY0tkTkRUZmsrcVlEQT09
 \n Zoom: \n Abstract: \n Details: \n A guided rocket system performance is
  often evaluated by solving an optimal control problem which minimizes a p
 re-defined objective function\, e.g. control effort\, while satisfying req
 uired boundary conditions. However\, rocket guidance has constrict “real
 -time” computational and duration restrictions\, which the optimum solut
 ion methods do not satisfy.  Therefore\, there is need to efficiently obt
 ain a solution close to the optimal solution without the accompanying comp
 utational burdens.\nThe current research presents a hybrid analytic and nu
 merical approach for solving a required dynamic physics problem\, while ta
 king advantage of pre-defined optimal solution data. The chosen method\, n
 amed Neighboring Extremal Path method\, proposes a linearization of the no
 nlinear complex dynamic equations and optimality conditions around an opti
 mal reference rocket trajectory\, creating a linear “Two Point Boundary 
 Value Problem” (TPBVP). The TPBVP resulting augmented neighboring contro
 l shall drive the rocket along a required path to the desired impact point
 . Both open loop (OL) and closed loop (CL) Neighboring analyses were condu
 cted. The OL neighboring analysis was done with fixed final time and termi
 nal impact point perturbations\, using Indirect Shooting and Backwards Swe
 ep approaches of solution. The CL neighboring optimum feedback law was tes
 ted in the presence of parameter uncertainties\, using Backwards Sweep app
 roach for fixed and unspecified terminal time.\nThe analysis showed the Ne
 ighboring Extremal method validity with perturbed rocket conditions (inclu
 ding wind) while reviewing a wide range of parameter uncertainties. Mostly
 \, the analyses showed acceptable impact point errors\, however\, in order
  to fully fulfill the requirements\, an unspecified final time closed loop
  neighboring control is necessary.\nZoom Meeting
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/98155466137?pwd=WHFrUXFvNDQzY0tkTkRUZms
 rcVlEQT09

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DTSTART:20201025T010000

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