An Extended Kalman Filter for Estimating Aerodynamic Coefficients.

Abstract

This report describes an extended Kalman filter (EKF) algorithm developed to estimate the aerodynamic coefficients of projectiles, based on discrete free-flight trajectory measurements. These measurements consist of three spatial positions and three angular orientations, relative to a fixed inertial coordinate system, and time-of-flight at 50 downrange positions along the trajectory. The algorithm is based upon a nonlinear six-degree-of-freedom model of a rotationally symmetric rigid body, and it incorporates a stochastic measurement model that approximates the conditions which exist in a ballistic test range.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1976
Accession Number
ADA040594

Entities

People

  • Charles M. Brown Jr.

Organizations

  • TASC, Inc

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Algorithms
  • Angular Motion
  • Computational Science
  • Computations
  • Coordinate Systems
  • Covariance
  • Equations
  • Equations Of Motion
  • Euler Angles
  • Filters
  • Inertial Navigation Systems
  • Kalman Filters
  • Mathematical Models
  • Operating Systems
  • Research Facilities

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Control Systems Engineering.