Accession Number : ADA316795

Title :   Linear Modeling of Tiltrotor Aircraft (In Helicopter and Airplane Modes) for Stability Analysis and Preliminary Design.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Klein, Gary D.

PDF Url : ADA316795

Report Date : JUN 1996

Pagination or Media Count : 222

Abstract : This thesis investigates the linear state space modeling of a tiltrotor aircraft by modifying an existing MATLAB routine which is used for preliminary (helicopter) stability and control analysis. The modifications consist of changing existing script files along with adding new ones. The modifications result in having a routine that allows the input of tiltrotor characteristics and subsequently generates a state space model along with other stability and control characteristics. The tiltrotor modeling is validated by the input of XV-15 characteristic data into the program and performing a eigenvalue comparison with a model of a similar tiltrotor, the V-22. A more extensive comparison is performed with another XV-15 model which has been extensively used and validated with wind tunnel and flight tests.

Descriptors :   *SOFTWARE ENGINEERING, *AERODYNAMIC STABILITY, *HELICOPTERS, *TILT ROTOR AIRCRAFT, COMPUTER PROGRAM DOCUMENTATION, MATHEMATICAL MODELS, PITCH(MOTION), COMPUTER AIDED DESIGN, THESES, INPUT OUTPUT PROCESSING, EIGENVALUES, ROTOR BLADES(ROTARY WINGS), AIRCRAFT MODELS, AERODYNAMIC LIFT, FREQUENCY RESPONSE, HOVERING, TAILS(AIRCRAFT), TRIM(AERODYNAMICS), AIRCRAFT DESIGN.

Subject Categories : Aerodynamics
      Helicopters
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE