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Optimal Estimation of Missile Free-Flight Trjectory. Comparative Results of Linear and Nonlinear Kalman Filter Approaches.
Final rept. Apr-Jul 80,
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
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This is a technical report on the application of optimal estimation theory for estimating the trajectory of a free-flight missile, as a means of evaluating missile performance. Several approaches were investigated linear Kalman filter working in Cartesian Coordinates and nonlinear extended Kalman filter implemented in Cartesian Coordinates. A six-degree of freedom simulation was used to generate the free-flight trajectory of the missile. A simulated radar, positioned at the origin of the inertial ground reference frame, generated range, azimuth, and elevation observation data. An analysis was conducted in the following three areas 1 initialization, 2 Q matrix weighting, and 3 observation of noise variances. The nonlinear filter approach linear dynamics with nonlinear measurements proved to exhibit superior performance over a strictly linear filter approach. further investigations in specific areas, are recommended. Author
APPROVED FOR PUBLIC RELEASE