Accession Number:

ADA231196

Title:

Kalman Filter Tracking of a Reflective Target Using Forward Looking Infrared Measurements and Laser Illumination

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1990-12-01

Pagination or Media Count:

318.0

Abstract:

This thesis investigates Kalman filter tracking of a missile hardbody, at a range of 2,000 kilometers, using forward looking infrared FLIR measurements and low-energy laser illumination of the missile hardbody. A missile reflectivity model provides realism in the simulation. The tracking scenario uses one filter, provided with FLIR measurements, to estimate the intensity centroid location of the missiles plume. A second, independent, filter estimates the center-of-mass of the missile hardbody. The center-of-mass measurements provided to this filter are computed from information gathered by scanning a low-energy laser along the first filters estimate of the missile velocity vector. Single scans of the laser produce 20 percent reflection returns, while a sweep multiple scans provides a measurement at each sample time. The need for a laser sweep results from inaccurate filter pointing of the FLIR sensor. A comparison between a one-state and two-state filter in estimating the hardbody center-of-mass shows that a one-state estimator performs as well as a two-state filter, with almost no error. The principle error in estimating the missile center-of-mass is along the centerline of the missile, for which the one-state filter is tuned. Author

Subject Categories:

  • Numerical Mathematics
  • Infrared Detection and Detectors
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE