The hybrid law design based on interacting multiple model algorithm

A hybrid differential game law DGL/H based on IMM algorithm is proposed for endgame randomly maneuvering target interception to solve the robustness of traditional single guidance law and the target state estimation delayed high sensitivity. IMM/DGL/H law takes the performance advantage of three differential game laws, DGL/C, DGL/1 and DGL/0 law, into account, employs the change of model probability of IMM algorithm to detect the evasive maneuver, and then achieves the guidance law online options in use of the detection time to weaken the estimation delay for homing performance. Simulation results show that IMM algorithm for acceleration estimation can obtain higher estimation accuracy. The hybrid differential game law DGL/ H, compared with a single guidance law, has a better homing performance.