Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"phugoid"”.
-
Simultaneous identification of short period and phugoid stability parameters using an advanced maximum likelihood method
… great promise in obtaining the short period and phugoid stability derivatives from one maneuver. Extraction of the short period stability parameters in the presence of the phugoid was easy, straight forward, and yielded results similar to those obtained from pure short period data.
-
An analytical investigation of aircraft handling qualities
… longitudinal short-period control. The lateral phugoid mode is also investigated and the conclusion reached is that this mode cannot be controlled in a manner resulting in "good" pilot ratings. Comparison of the results obtained for the longitudinal short-period mode with experimental data …
-
Closed-loop Reference Model adaptive control : with application to very flexible aircraft
… the flexible aircraft had instability in the phugoid mode for large dihedral angles and that including the flexible dynamics was necessary to arrive at an appropriate trim condition. In this thesis, we show how these large dihedral excursions can occur in the presence of turbulence, by …
-
A Simplified Icing Model for Simulation and Analysis of Dynamic Effects
… is recorded for the damping ratios of the phugoid and Dutch roll. However, it is the short term oscillation that experiences a degradation by one level of handling qualities on the Cooper-Harper scale.
-
Dynamic Stability and Handling Qualities of Small Unmanned-Aerial-Vehicles UNMANNED-AERIAL-VEHICLES
<p>General aircraft dynamic stability theory was used to predict the natural frequencies, damping ratios and time constants of the dynamic modes for three specific small UAVs with wingspans on the scale from 0.6 meters to 1.2 meters. Using USAF DatCom methods, a spreadsheet program for predicting …