Investigation of Estimation Techniques in Optimally Guided Air-to-Air Missiles

摘要

In previous work the author sought to explain the fact that certain states estimated by an extended Kalman filter differed significantly from the same quantities generated by a truth model. Results indicated that the probable cause for this behavior was the state model of the system used in the extended Kalman filter. In the present work the study was extended to include the treatment of differences observed in system behavior when under the influence of extended Kalman filters based upon six-state and nine-state models. When the apparent anomalies in system performance are viewed in the light of filter modeling limitations, the performance of both the six-state and nine-state filters appear to be well within the bounds of expectation. A similar statement could be made for the relative performance between the two filters. Clearly, the six-state filter would not be satisfactory in a realistic environment. The nine-state filter, however, while performing quite well for the runs examined, might be made still better through improvements in its state model. Keywords: Mathematical filter estimations; Air to air missiles; Optimal guidance. (EDC)