Accession Number : ADA557920


Title :   Modeling, Simulation, and Flight Test for Automatic Flight Control of the Condor Hybrid-Electric Remote Piloted Aircraft


Descriptive Note : Master's thesis


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


Personal Author(s) : Giacomo, Christopher


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a557920.pdf


Report Date : Mar 2012


Pagination or Media Count : 160


Abstract : This thesis describes the modeling and verification process for the stability and control analysis of the Condor hybrid-electric Remote-Piloted Aircraft (HE-RPA). Due to the high-aspect ratio, sailplane-like geometry of the aircraft, both longitudinal and lateral/directional aerodynamic moments and effects are investigated. The aircraft is modeled using both digital DATCOM as well as the JET5 Excel-based design tool. Static model data is used to create a detailed assessment of predictive flight characteristics and PID autopilot gains that are verified with autonomous flight test. PID gain values were determined using a six degree of freedom linear simulation with the Matlab/SIMULINK software. Flight testing revealed an over-prediction of the short period poles natural frequency, and a prediction to within 0.5% error of the long-period pole frequency. Flight test results show the tuned model PID gains produced a 21.7% and 44.1% reduction in the altitude and roll angle error, respectively. This research effort was successful in providing an analytic and simulation model for the hybrid-electric RPA, supporting first-ever flight test of parallel hybrid-electric propulsion system on a small RPA.


Descriptors :   *REMOTELY PILOTED VEHICLES , AERODYNAMIC CHARACTERISTICS , AUTOMATIC PILOTS , ELECTRIC PROPULSION , FLIGHT CONTROL SYSTEMS , FLIGHT TESTING , HYBRID PROPULSION


Subject Categories : Pilotless Aircraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE