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. Doppler systems, Laser velocimeters, Measurement, Orthogonality, Cartesian coordinates, Information, Velocity, Fluid flow.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA280276

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
  • Doppler Effect
  • Engineering
  • Flow
  • Fluid Flow
  • Free Stream
  • Laser Velocimeters
  • Measurement
  • Orientation (Direction)
  • Radiation
  • United States
  • Velocimeters
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.

Technology Areas

  • Directed Energy
  • Space
  • Space - Spacecraft Maneuvers