Inversion of Ringdown Data for a Rotating Liquid Cylinder.

Abstract

Disturbance pressure data from both numerical and gyroscope experiments on ringdown of inertial waves were fitted to a sum of complex exponentials using a linearized least squares method. For the numerical experiments, frequencies and decay rates agreed with those predicted by eigenvalue calculations to within a few precent. Eigenfrequencies calculated from gyroscope data agreed with prediction to within 2% while all decay rates were greater than predicted, some by as much as 65%. An autoregressive method was developed and tested on both simulated and real data. At its present stage of development this approach was found to be inferior to the least squares method. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1983
Accession Number
ADA134742

Entities

People

  • K. D. Aldridge

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautics
  • Aircrafts
  • Algorithms
  • Aspect Ratio
  • Data Analysis
  • Data Sets
  • Energy Systems
  • Engineering
  • Engineers
  • Equations
  • Frequency
  • Information Science
  • Jet Propulsion
  • Least Squares Method
  • Physics
  • Physics Laboratories
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Inertial Navigation Systems.
  • Mathematics or Statistics