Accession Number : ADA615251


Title :   Modeling Attitude Variance in Small UAS's for Acoustic Signature Simplification Using Experimental Design in a Hardware-in-the-Loop Simulation


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Gillespie, Mitchell N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a615251.pdf


Report Date : 26 Mar 2015


Pagination or Media Count : 96


Abstract : The role and use of unmanned aerial systems (UASs) by the Department of Defense has been on the rise over the past decade. The majority of these systems are being utilized in environments where the UAS???s acoustic stealth is frequently of greater importance than radio frequency or visual stealth. Additionally, missions involving these types of systems tend to involve dynamic mission planning requirements rather than preplanned routing. Therefore, an acoustic model capable of providing real-time probability of detection information is desired. However, with present-day technology and existing acoustic models, real-time calculation of the complete acoustic signature for a small UAS (SUAS) is not feasible. This research demonstrates that the acoustic signature of the Sig Rascal 110 SUAS can be reduced by greater than 99.3% when a listener point of interest is directly below the aircraft using a methodology to model SUAS attitude variance to reduce the portion of the acoustic signature of concern. This model is developed using designed experiments in a hardware-in-the-loop simulation and uses aircraft flight parameters as factors determining attitude variance.


Descriptors :   *ACOUSTIC SIGNATURES , *DRONES , *FLIGHT CONTROL SYSTEMS , *HARDWARE IN THE LOOP , ACOUSTICS , AUTOMATIC PILOTS , DEPARTMENT OF DEFENSE , EXPERIMENTAL DESIGN , METHODOLOGY , MISSIONS , RADIOFREQUENCY , REAL TIME , SIMPLIFICATION , SIMULATION , SPHERICAL HARMONICS , THESES


Subject Categories : Pilotless Aircraft
      Flight Control and Instrumentation
      Acoustic Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE