Rotorcraft Dynamics
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Rotor Wake Modeling |
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During the flight of
airplane propellers, helicopters, and tilt rotors, the rotor wake
undergoes important dynamic motions that profoundly influence vehicle
dynamics. This project seeks to correctly model this behavior.
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Aeroelasticity |
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Aeroelastic modelling of helicopter rotors with unsteady
aerodynamics and nonlinear structural deformations. Computation of
vibration and stability.
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Response to Stall |
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Structural/aerodynamic interaction due to dynamic stall of
wings and rotors. Trim methodologies in the presence of stall.
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Rim and Stability |
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Solution of rotor dynamic equations with engine dynamics
and multiple rotors involves solution of periodic-coefficient differential
equations. This task deals with finding efficient solution strategies for
this problem.
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Finite Element Analysis
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Numerical Stress Analysis |
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Methods for the numerical analysis of problems in solid
mechanics by the finite element method.
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Adaptive Finite-Element Methods |
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The p-version of the finite element method; estimation
and control of the errors of discretization and idealization in
mathematical models of physical systems. Superconvergent extraction
methods.
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Numerical Simulation of Mechanical Systems |
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Hierarchic modeling strategies in computational mechanics.
Dimensional reduction methods, analytical treatment of laminated
composites.
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Recent Publications
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| Yu, K. and Peters, D.A., "Applications of State-Space Wake Models to
Full and Partial Ground Effect", to be presented at the 2nd International
Basic Research Conference on Rotorcraft Technology, 2005, Nanjing, China
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Abstract (PDF format)
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| Peters, D.A., and Hsieh, M.A., "Improvements to Robustness
of Off-Disk Finite-State Wake Models", to be presented at the Eleventh International
Workshop on Rotorcraft Dynamics and Aeroelasticity, October 12-14, Florida Atlantic University, Boca Raton, Florida
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Abstract (PDF format)
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| Hsieh, M.A., and Peters, D.A., "Convergence and
Conditioning of Dynamic Wake Models for Flight Dynamics", to be presented at
the 31st European Rotorcraft Forum, September 13-15, Florence, Italy
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Abstract (PDF format)
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Yu, K. and Peters, D.A., "A Nonlinear State-Space Modeling of Dynamic Ground
Effect", Journal of the American Helicopter Society (to appear in July's issue)
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Abstract (PDF format)
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| Yu, K. and Peters, D.A., "A Closed-Form Representation of Three-Dimensional
State-Space Influence Coefficients", proceedings of the 61st American Helicopter
Society Annual Forum, June 1-3, 2005, Grapevine, TX, USA
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Abstract (PDF format)
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| Makinen, S. M. and Peters, D. A., "Comparison of Dynamic Wake
Models with Closed-Form Optimum Propeller Solutions," 30th European Rotorcraft Forum, Marseilles,
France, September 14-16, 2004
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Abstract (PDF format)
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| Yu, K. and Peters, D.A., "Use of Potential Flow
State-Space Inflow Modelling for Mass Source Rotors", the Aeronautical
Journal, Vol. 108, No. 1085, July 2004, pp.333-344
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Abstract (PDF format)
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| Yu, K. and Peters, D.A., "Three-Dimensional State-Space
Modeling of Ground Effect in Dynamic Flow Field", proceedings of the 60th American
Helicopter Society Annual Forum, June 7-10, 2004, Baltimore, MD, USA
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Abstract (PDF format)
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| Hsieh, M.A., Peters, D.A. and McDonnell, W.R.,
"Stability and Response of a Forward Mounted Servo-Flap Driven by a
Sub-Servo-Tab", proceedings of the AHS 4th Decennial Specialist's
Conference, Jan 21-23, 2004, San Francisco, CA, USA
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Abstract (PDF format)
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| Yu, K. and Peters, D.A., "Net Mass Flow
Components in a Three-Dimensional Unsteady Rotor Inflow Model", proceedings
of the International Mechanical Engineering Congress and Exposition 2003,
November 15-21, 2003, Washington D.C., USA, paper No. IMECE2003-42459
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Abstract (PDF format)
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| Peters, D.A. and Makinen, S.M., "A Comparison
of Prandtl and Goldstein Optimum Propeller Solutions with Finite-State
Dynamic Wake Models", presented at the International Workshop on Aeroelasticity of
Rotorcraft Systems, October, 2003, Atlanta, GA, USA
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Abstract (PDF format)
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| Yu, K. and Peters, D.A., "Use of Potential
Flow State-Space Inflow Modeling for Mass Source Rotors", proceedings of
the 29th European Rotorcraft Forum, September 16-18, 2003, Friedrichshafen,
Germany, paper No. 68
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Abstract (PDF format)
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