Relationship between Local and Effective Aerodynamic Pitch-Damping Derivatives as Measured by a Forced-Oscillation Balance for Preliminary Viking Configurations

Abstract

Forced-oscillation pitch-damping balances oscillating over a small angular amplitude range about a nominal angle of attack yield an effective value of aerodynamic damping if the damping is a nonlinear function of angle of attack. Computer-simulated motion studies lead to developing a procedure to extract the local damping from the output of a forced-oscillation balance. A derivation is given of the basic integral equation relating local and effective damping. The method is applied to three preliminary unmanned Mars reentry (Viking) model configurations, and the results are discussed.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1972
Accession Number
AD0741769

Entities

People

  • J. P. Billingsley
  • W. S. Norman

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Amplitude
  • Angular Motion
  • Coefficients
  • Computational Science
  • Differential Equations
  • Equations
  • Experimental Data
  • Fourier Series
  • Frequency
  • Government Procurement
  • Integral Equations
  • Integrals
  • Mach Number
  • Oscillation
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.

Technology Areas

  • Autonomy