Accession Number:

ADA164205

Title:

Kalman Filter Design for the Long Range Intercept Function of the F-4E/G Fire Control System.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1985-12-01

Pagination or Media Count:

366.0

Abstract:

This study examines reduced-order Kalman filters designed to improve performance of the F-4EG long range air-to-air missile capability LRI function. Operational requirements dictate a high degree of accuracy and constraints imposed by existing hardware mandate minimal complexity. Two linear dynamics models are proposed, one based on constant target velocity, and the other based on time-correlated target acceleration. Both are defined in inertial Cartesian coordinates aligned with north, east, and down. A nonlinear model is developed for measurements available in the existing F-4EG hardware, including range, range rate, radar antenna gimbal angles, and radar antenna rates. The models are implemented in extended Kalman filter formulations employing linear propagation equations to avoid on-line numerical integration. Performance evaluations are performed on three test trajectories using Monte Carlo analysis. Filter tuning, error budgets, adaptive techniques, and observability issues are addressed during filter evaluation. Results of the evaluation indicate the filter designs can meet the requirements of the F-4EG fire control system. Recommendations are made for continued testing and for operational implementation.

Subject Categories:

  • Numerical Mathematics
  • Active and Passive Radar Detection and Equipment
  • Fire Control and Bombing Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE