Tracking of hypersonic sliding target in near-space

Abstract

According to the characteristics of hypersonic speed, strong maneuvering and acceleration gust of near-space target, a modified strong tracking filter (MSTF) algorithm based on the target characteristic analysis is proposed under the Earth centered Earth fixed (ECEF) coordinate system. For this method, unbiased transformation is used to reduce the influence of rotation, translation and linearization errors of the hypersonic target under the ECEF coordinate system firstly. Then based on the full analysis of target characteristics, a strong tracking filter (STF) model is developed to track the near-space hypersonic sliding target by changing the model parameters adaptively. Finally, reasonable detection and compensation of acceleration gust are performed to further modify the tracking accuracy of the STF model. Simulation results show that near-space target tracking can be finished more effectively than the existing methods by using the proposed algorithm.