Abstract: A tracking approach with adaptive maneuver frequency is proposed in terms of tracking a Hpersonic Glide Target (HGT) with a variety of maneuver modes. The Singer model between the Constant Velocity (CV) and Constant Acceleration (CA) models is employed to represent the change of aerodynamic acceleration, followed by the establishment of a state equation for the tracking system. The measurement equation is then obtained based on the measurements for ground-based radar. In view of significantly different magnitudes between the range and angle, spherical measurements are transformed into position ones. To adapt to flexible and diverse maneuver modes of HGT, the adaptation of maneuver-frequency parameter is achieved in the Singer model based on the orthogonal principle and the Unscented Kalman Filter (UKF). An adjustment factor which can reflect the state model error is calculated via innovation of filtering and used to enlarge the maneuver frequency in the Singer model. The process noise is subsequently modified in the state equation, reducing the model error. Finally, by tracking two typical trajectories with maneuvers and making comparisons with other methods such as the interacting multiple model, the simulation results indicate that the proposed method has high tracking accuracy and little computational cost, and can well adapt to the step maneuver and the continuous maneuver with various intensity.

Key words: hypersonic glide target, target tracking, Singer model, maneuver frequency adaptation, unscented Kalman filter