A Kalman Filter for Tracking Constant Thrust Theater Ballistic Missiles
NAVAL SURFACE WARFARE CENTER DAHLGREN DIV VA
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Tracking Theater Ballistic Missiles TBMs during boost phase is becoming a requirement for some engagement strategies. The requirement for boost phase tracking can be based on the needs of an early launch doctrine or can be motivated by the availability of a cue provided by an airborne search and track infraredlaser system. The standard filters require that the target being tracked have, respectively, constant velocity or constant acceleration. If a TBM does not have constant acceleration during boost a filter may not provide valid estimates of the TBMs position and velocity and, as a result, may not be able to maintain track. TBM boost profiles assuming a constant thrust and a constant rate of fuel consumption show a hyperbolically increasing acceleration. This paper presents and analyses a Kalman filter designed to track a missile experiencing hyperbolically increasing acceleration during boost phase. For purposes of comparison, the tracking results of an alpha-beta filter are provided for a general class of TBMs representative of the threat set.
- Antimissile Defense Systems
- Guided Missile Trajectories, Accuracy and Ballistics