Stability & Control Modeling of Tiltrotor Aircraft

Abstract :-
This thesis develops a simple open-source model of a tiltrotor using the basic equations of motion. The model focused on stability and control aspects of the XV-15 aircraft using simple linear analysis and, in general, did not add in correction or scaling factors to obtain a better match with flight data. Subsequent analysis performed included a trim and time history solution. A linearized state space model was also developed and analyzed using state space matrices, Bode plots, and eigenvalue analysis. The results were validated against generic tiltrotor simulation model results and compared to flight test where available. Continue reading Stability & Control Modeling of Tiltrotor Aircraft

Control-Oriented Reduced Order Modeling of Dipteran Flapping Flight

Abstract :-
The work begins with automated measurement of insect wing motions in free flight, which are then used to calculate flight forces via an empirically-derived aerodynamics model. When paired with rigid body dynamics and experimentally measured state feedback, both the bare airframe and closed loop systems may be analyzed using frequency domain system identification. Flight dynamics models describing maneuvering about hover and cruise conditions are presented for example fruit flies (Drosophila melanogaster) and blowflies (Calliphorids). The results show that biologically measured feedback paths are appropriate for flight stabilization and sexual dimorphism is only a minor factor in flight dynamics. Continue reading Control-Oriented Reduced Order Modeling of Dipteran Flapping Flight