Abstract: The tracking problem for the maneuvering target is studied and an adaptive filter is shown in the paper. In the adaptive filter we adopt the different dynamical models depending on the flight states of the airplane and present the optimal detecting method which not only detects maneuver of The airplane but also determines the fashion of the maneuver based on the three typical 'light states of the airplane; the straight line motion with constant speed, the straight line maneuver with constant-acceleration and the turn maneuver. The simulation examples show that the adaptive filter provides the higher tracking accuracy.

Key words: maneuvering target, optimal detecting, adaptive filter