We describe two schemes for scheduling an integrated flight and propulsion control system for an experimental vertical/short take-off and landing (V/STOL) aircraft concept in the acceleration from hover (0–120 kn) flight phase. Multivariable integrated flight and propulsion controllers are designed at several points over the V/STOL envelope and implemented as exact plant observers with state fe...

On August 25, 2004, a series of flight experiments and demonstrations were flown at the McKenna urban operations complex at Ft. Benning, GA. These experiments represented the culmination of the rotary wing segment of the DARPA Software Enabled Control program. To support these efforts, an open system Unmanned Aerial Vehicle testbed architecture was developed for the GTMax and GTSpy university-o...

Title of Document: EMERGENCY FLIGHT PLANNING FOR THE GENERALIZED TRANSPORT MODEL AIRCRAFT WITH LEFT WING DAMAGE Yunshen Tang, Master of Science, 2006 Directed By: Assistant Professor, Ella M. Atkins, Department of Aerospace Engineering A nontrivial fraction of aviation accidents are caused by in-flight damage or failures that reduce performance. Researchers are working to ensure future avionics...

regarding the role and importance of subsurface drainage in water table control, many studies have been made throughout the world to find out new techniques and more economical solutions, especially as related to different pipe envelope material and their installations. this research was conducted to investigate the use of rice husk, as drain envelope material, in drainage installations. in add...

An adaptive reconfigurable flight control system using the mode switching of multiple models is studied. The conventional mode switching method may not guarantee the stability and the performance of the system. In this study, modified adaptive mode switching and decision logic are proposed to improve the adaptiveness of the transient dynamics of a system while maintaining the stability of the c...

Abstract The research presented in this paper focuses on the development of a quasi-Linear Parameter Varying (qLPV) model for XV-15 tiltrotor aircraft. specific category qLPV modeling technique, known as stitching is employed to time-varying dynamics aircraft over entire flight envelope. In approach, discrete linear state-space models are interpolated through lookup tables function scheduling p...

Abstract. This paper presents a robust control law design for a commercial aircraft pitch autopilot dedicated to perform the approach maneuver. The design involves only the longitudinal axis. Traditionally, in the aerospace industry, the design of autopilot functions follows a process that involves the partitioning of the flight operational envelope into separate flight conditions, the design o...

During the past decade, the Navy has considerably improved its capabilities in aircraft/weapon integration. In 1989 it took more than 400 hours of wind tunnel testing, which cost 1,5000,000, and 20 flights to clear the JSOW from the F-18 to Mach 0.95. This year the MK-83 JDAM was cleared after only 60 hours of wind tunnel testing and five flights to the full F-18 aircraft envelope of Mach 1.3. ...

A model reference nonlinear dynamic inversion control law has been developed to provide a baseline controller for research into simple adaptive elements for advanced flight control laws. This controller has been implemented and tested in a hardware-in-the-loop simulation and in flight. The flight results agree well with the simulation predictions and show good handling qualities throughout the ...