Nonorthogonal Measurement Axes in Laser Doppler Velocimetry.

Abstract

The measurement axes of virtually all multiaxis laser Doppler velocimeter (LDV) systems are nonorthogonal to some degree and are, in general, rotated with respect to orthogonal, Cartesian reference axes. Systematic errors are introduced into the LDV data if axis nonorthogonality and spatial orientation parameters are not properly taken into account by the data reduction equations. This report develops the general 3-space expressions for velocity vector magnitude and spatial orientation in terms of rotated, oblique LDV measurement axis parameters and the velocity vector projections measured by each of these axes. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA073700

Entities

People

  • F. L. Crosswy

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Cartesian Coordinates
  • Coordinate Systems
  • Data Reduction
  • Engineering
  • Flow
  • Fluid Flow
  • Free Stream
  • Frequency
  • Measurement
  • Orientation (Direction)
  • Radiation
  • Tennessee
  • Three Dimensional
  • United States
  • Velocimeters

Readers

  • Control Systems Engineering.
  • Fluid Dynamics.

Technology Areas

  • Directed Energy
  • Space
  • Space - Spacecraft Maneuvers