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UID:0-271@aerospace.technion.ac.il
DTSTART;TZID=Asia/Jerusalem:20210106T163000
DTEND;TZID=Asia/Jerusalem:20210106T173000
DTSTAMP:20230525T064427Z
URL:https://aerospace.technion.ac.il/events/finding-the-worst-case-behavio
r-of-an-accelerating-rocket-due-to-side-wind-disturbances/
SUMMARY:Finding the Worst-Case Behavior of an Accelerating Rocket due to Si
de-Wind Disturbances
DESCRIPTION:Lecturer:Mor Friedler\n Faculty:Aerospace engineering\n Institu
te:Technion – Israel Institute of Technology\n Location:https://technion
.zoom.us/j/97200263778\n Zoom: \n Abstract: \n Details: \n Flight control
law clearance provides the conditions needed for the system to operate in
the stability boundaries. One way to do so is to test all the parameters a
nd variables in question. This method is time and resources wasteful\, and
not free of errors. A different approach\, that has already been proven e
ffective\, is to use optimization tools. Instead of proving the system can
endure every condition\, the search can be narrowed to find only the crit
ical conditions and determine a boundary of safety.\nWhen it comes to rock
ets\, there are various factors in the acceleration phase that affect its
trajectory. A very important factor is side-winds that cause angles-of-sid
eslip that affect the rocket's motion during the acceleration phase\, and
eventually the whole trajectory by shifting the ballistic plane.\nThe chos
en optimization method for solving this problem is Neustadt's. This is a
simple method for finding the minimal effort required to bring a linear sy
stem from the initial condition to its ending condition with minimum contr
ol effort. This mathematical method was chosen since it yields a simple an
alytical solution as compare with other methods.\nThe critical side-wind
was found using a simplified model of an accelerating rocket and tested on
the full model. Since ballistic motion is always forward\, it is a common
analytical practice to express some of the equations using downrange dist
ance instead of time as the independent variable. This way\, some expressi
ons become simpler and calculations are easier.\nA sensitivity study will
be presented\, showing the critical side-wind that was found is indeed the
critical boundary for a safe launch. Furthermore\, it is shown that an ae
rodynamic controller can help widen the boundaries.\nZoom meeting
CATEGORIES:Seminars
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