Abstract:

As the representative of hypersonic vehicles in the near space, X-51A and HTV-2 with characteristics of high speed and irregular acceleration often adopt the way of nonballistic maneuver flight, which cannot make an accurate estimation of the motion state. For tracking near space targets with four typical nonballistic maneuver types, a modified variable structure interacting multiple model (MVSIMM) algorithm is designed. This algorithm takes the current statistical (CS) model as the central model and the coordinated turn (CT) model on the left side and right side, which solves the problem of model switching delay, can be faster than compared with the traditional VSIMM algorithm on the aspect of model switching, can be achieved tracking target in the near space with higher realtime and higher accuracy. The effect of MVSIMM algorithm is better than fixed structure interacting multiple model (FSIMM) filter algorithm towards four nonballistic maneuver models with Matlab simulation results above.