Through the analysis of thecurrent statistical model based on adaptive Kalman filtering algorithm deficiency, in the current statistical model on the basis of the air resistance coefficient and nonzero acceleration, this paper proposes current semi-Markovian series motor model, the model is more in line with the actual conditions of maneuvering target. Based on this model, it puts forward some improvement adaptive Kalman filter. The simulation results show that the improved current semi-Markovian Kalman fil...