The movement of highly maneuvering hypersonic target has characteristics of complexity

mutability

and strong nonlinearity

aiming at the problem that single model algorithm is difficult to track such targets

a modified interacting multiple model（IMM） algorithm is proposed

this algorithm overcomes the shortage of single model algorithm tracking highly maneuvering target and normal IMM algorithm calculating likelihood function inaccurately

realizes variable dimension interaction of different sub models;cubature Kalman filtering（CKF）algorithm is used to complete high-precision nonlinear transform of radar measurement data and target states.The simulation results show that compared with single model algorithm and normal IMM algorithm

the modified IMMCKF algorithm obviously improves tracking precision of highly maneuvering hypersonic target.