Accession Number : ADA308556

Title :   Center of Excellence in Rotorcraft Technology.

Descriptive Note : Final rept. 1 Nov 92-31 Oct 95,

Corporate Author : GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING

Personal Author(s) : Schrage, D. P. ; Armanios, E. A. ; Berdichevsky, V. L. ; Calise, A. J. ; Hanagud, S. V.

PDF Url : ADA308556

Report Date : 31 DEC 1995

Pagination or Media Count : 54

Abstract : Georgia Tech's research investigations during the reporting period focused on several analytical and experimental tasks in rotorcraft technology. In the area of Rotorcraft Aerodynamics, work continued on the development of numerical formulations for prediction of viscous flow over rotors and rotor-body combinations without resort to empirical or Lagrangian-based formulations for capturing the tip vortex. Experimental work in transient aerodynamic interactions were aimed at a new capability for, among others, a detailed study of flow separation and reattachment using a basic rotor/wing interaction experiment. In the area of Rotor Dynamics & Aeroelasticity, investigations focused on rotor vibration and trim with advanced finite-state wake aerodynamics. In the area of Structures and Materials, dynamic modeling of composite beams was investigated including the edge-zone behavior. Research in robust control theory was devoted to exploring robustness and controller order reduction issues related to the design of rotorcraft flight control systems, development of synthesis techniques for designing full envelope flight controllers without the need for gain scheduling, and neural network based and numerical investigation of a direct adaptive tracking control architecture.

Descriptors :   *ROTARY WINGS, *FLIGHT CONTROL SYSTEMS, *AERODYNAMIC CHARACTERISTICS, *ROTARY WING AIRCRAFT, VIBRATION, AERODYNAMIC STABILITY, COMPOSITE STRUCTURES, VORTICES, VORTEX SHEDDING, AEROELASTICITY, FLOW RATE, HELICOPTERS, VISCOUS FLOW, FLOW SEPARATION, AERODYNAMIC LIFT.

Subject Categories : Aerodynamics
      Helicopters
      Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE