ANALYSIS OF THE PUFFS TRACKER WOX-1A AS A GENERAL NONLINEAR FILTER
NAVAL ORDNANCE LAB WHITE OAK MD
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Statistical analysis is made of the PUFFS Target Tracker WOX-1A. This device uses a nonlinear tracking scheme such that the estimated target position is changed in discrete steps of fixed magnitude, dependent only upon the sign of observed error at regular sampling intervals. The theoretical performance characteristics of the tracker are determined from the statisticalANALYSIS. Equations are developed for the output standard deviation of tracker position, the lag in tracker position due to bearing rates, and the equivalent integration time of the tracker as functions of the input standard deviation and the tracker step size. Experimental verification is presented for some of the results, and the qualitative operation of the tracker is discussed as an adaptive system interchanging bandwidth and output noise. Other applications for nonlinear systems of this type are mentioned, including tracking and post-filtering problems in sonar or radar, and filtering problems in navigation systems.
- Statistics and Probability