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Thrust Vectoring and After Burner System for Increasing Survivability of Micro-Jet UAVs

Thrust Vectoring and After Burner System for Increasing Survivability of Micro-Jet UAVs

Monday 26/04/2021
  • Dor Shitrit
  • Work towards MSc degree under the supervision of Professor (Emeritus) Yeshayahou Levy (Technion)
  • Department of Aerospace Engineering
  • Technion – Israel Institute of Technology
  • The talk will be given in Hebrew

A major current threat on Unmanned Aerial Vehicles (UAVs) and Air-to-Surface Missiles (ASM) is being intercepted by Surface-to-Air Missiles (SAMs) with maneuvering capabilities. There are many methods to increase the survivability of such UAV and ASM while the challenge is keeping them cost-effective and relevant to the modern battlefield.

One of the ways to increase survivability is by improving agility. Agility of an aircraft can be improved by using thrust vectoring and activation of an after burner. It enables the platform to accelerate by operating the aft burner while vectorizing the thrust -thus “breaking lock” from the potential threat.

This study aims to investigate such integration in micro turbo jet UAVs. It includes dynamic simulation of the after burner as well as the vectoring nozzle systems and their effect on the aircraft overall performance. A total of 3 engine power configurations (basic with constant nozzle, adjustable nozzle, adjustable nozzle with aft burner) and 2 vectoring configurations (with/without) are examined.

For this purpose, Dornier “DT-45” UAV and “SA7-Strella” SAM are chosen as target and interceptor demonstrators. Whole engine decks are created including designing engine control system to withstand the engine limitations during the transient state. Drag polar, stability & control derivations of the target and interceptor main characteristics are estimated. Evasive maneuver is characterized, and a dedicated aircraft control system is implemented to support it.  Finally, a quantitative analysis for the joint contribution of thrust vectoring and after burner to the survivability of the aircraft is introduced by implementation of interception simulation.

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