Tracking filter for nonballistic targets in the near space based on modified variable structure interacting multiple model

As the representative of hypersonic vehicles in the near space, X-51A and HTV-2 with high speed and irregular acceleration often adopt nonballistic maneuver flight motion, which is hard to be accurately estimated. This paper focuses on three typical nonballistic maneuver models of near space targets, and proposes a new Modified Variable Structure Interacting Multiple Model (MVSEVIM) algorithm. For the three nonballistic maneuver models, simulation results show that the MVSEVIM algorithm is better than Fixed-Structure Interacting Multiple Model(FSEVIM) filter algorithms.