dc.contributor.advisor Wood, E. Roberts dc.contributor.advisor King, Robert L. dc.contributor.author Weissenfels, Robert D. dc.date March, 2000 dc.date.accessioned 2012-08-09T19:29:06Z dc.date.available 2012-08-09T19:29:06Z dc.date.issued 2000-03 dc.identifier.uri http://handle.dtic.mil/100.2/ADA377881 dc.identifier.uri http://hdl.handle.net/10945/9390 dc.description.abstract This thesis formulates the full nonlinear equations of motion for determining the stability of helicopter coupled rotor-fuselage motion utilizing MATLAB(registered)'s Symbolic Math Toolbox. Using the extended symbolic processor toolbox, the goal of this work was to eliminate the time consuming process of convening Fortran or C code generated by the symbolic processor, MAPLE(registered) into a MATLAB(registered) useable format where it is further incorporated into an S-function' to be used in the dynamic simulation environment. The formulation of the equations of motion utilized in this process is unique in that it uses the complete set of nonlinear terms in the equations of motions without utilizing ordering schemes, small angle assumptions, linearizing techniques, or other simplifying assumptions. After derivation, the equations of motion are numerically integrated using the dynamic simulation software SIMULINK(registered) and a time history plot is generated of blade and fuselage motion. The equations of motion are regenerated with each time step allowing the adjustment of characteristic structural, blade and dampening properties. These time traces can be used to explore the effects of damping nonlinearities, structural nonlinearities, active control, individual blade control, and damper failure on ground resonance. en_US dc.format.extent xvi, 94 p.;28 cm. en_US dc.language.iso en_US dc.publisher Monterey, California. Naval Postgraduate School en_US dc.rights Approved for public release, distribution unlimited. en_US dc.title Full nonlinear simulation of helicopter coupled rotor-fuselage motion using MATLAB Symbolic processor and dynamic simulation en_US dc.type Thesis en_US dc.description.service U.S. Navy (U.S.N.) author. en_US etd.thesisdegree.name M.S. in Aeronautical Engineering en_US etd.thesisdegree.level Masters en_US etd.thesisdegree.discipline Aeronautical Engineering en_US etd.thesisdegree.grantor Naval Postgraduate School en_US
﻿