Dynamic Modeling and Simplified UKF for Reentry Vehicle

Tracking reentry vehicle with strong maneuvers on-line is a challenging task. The key is to develop suitable dynamic models and estimation methods. Two kinds of modeling methods are discussed for reentry tracking, and the unscented filter (UKF) is introduced to the nonlinear tracking system. To reduce the computational load, three simplifications of UKF are developed. Furthermore, the feasibility and efficiency of dynamic models and simplified UKF algorithms are discussed by both theoretical analysis and simulation.