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UID:0-477@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20160720T163000

DTEND;TZID=Asia/Jerusalem:20160720T173000

DTSTAMP:20230603T191503Z

URL:https://aerospace.technion.ac.il/events/a-low-cost-laser-range-measure
 ment-based-terrain-following-concept-and-error-analysis/

SUMMARY:A Low-Cost Laser-Range-Measurement Based Terrain-Following Concept 
 and Error Analysis
DESCRIPTION:Lecturer:Arseny Livshitz\n Faculty:Department of Aerospace Engi
 neering\n Institute:Technion – Israel Institute of Technology\n Location
 :Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstra
 ct: \n Details: \n This seminar addresses the design and error assessment 
 and analysis of a low cost terrain following system for UAVs. Such a syste
 m enables an aircraft to maintain a pre-defined vertical separation (altit
 ude) with regard to the terrain surface over which it flies. First papers 
 on this subject date back to the sixties of the previous century\, focusin
 g primarily on radar based terrain following systems. To address the limit
 ations and constraints imposed by radar based systems\, new approaches hav
 e emerged which use electro-optical passive sensors (cameras) and provide 
 better compatibility to the UAV platform.\nIn this study a new approach is
  proposed to surmount the disadvantages of the previous systems and to pro
 vide a low cost terrain following solution for UAVs. This system utilizes 
 several laser range sensors in a strap-down configuration as its measureme
 nt device. The measurements obtained from the sensors are used to generate
  a desired terrain following trajectory for the aircraft. A trajectory tra
 cking algorithm is then incorporated to ensure that the aircraft remains o
 n the desired path\, thus satisfying the required altitude. The complexity
  and performance of the proposed system depends predominantly on the chose
 n layout of its sensors as well as the errors of its various components. T
 he related estimation and control algorithms designed for the terrain foll
 owing task have to address also system uncertainties and disturbances. The
  study discusses and thoroughly examines the various error factors affecti
 ng the system performance. The goal is to develop an analytical error mode
 l for the system thus pinpointing the different factors which may cause ei
 ther improvement or degradation in terrain following performance as well a
 s aid in the design process.\nThe performance of the terrain following sys
 tem is evaluated using a numerical Monte-Carlo simulation environment cons
 tructed for this purpose. The simulation results clearly demonstrate that 
 the suggested analytical error model agrees closely with the Monte-Carlo r
 esults both in trend and in values in the relevant domain. The resulting a
 nalytical error model quantifies the overall system tracking error\, outli
 nes the preferred values for various system parameters in order to achieve
  higher terrain following performance\, and mainly suggests the optimal po
 inting angle for the laser designators.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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TZID:Asia/Jerusalem

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DTSTART:20160325T030000

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